Migrate to pongo2 as template engine

Signed-off-by: Knut Ahlers <knut@ahlers.me>

Gopkg.lock

@@ -7,6 +7,12 @@
   revision = "7aef1d393c1e2d0758901853b59981c7adc67c7e"
   version = "v1.2.0"
 
+[[projects]]
+  name = "github.com/flosch/pongo2"
+  packages = ["."]
+  revision = "5e81b817a0c48c1c57cdf1a9056cf76bdee02ca9"
+  version = "v3.0"
+
 [[projects]]
   name = "github.com/golang/protobuf"
   packages = ["proto"]
@@ -71,7 +77,7 @@
     ".",
     "internal"
   ]
-  revision = "a032972e28060ca4f5644acffae3dfc268cc09db"
+  revision = "543e37812f10c46c622c9575afd7ad22f22a12ba"
 
 [[projects]]
   branch = "master"
@@ -111,6 +117,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "5c8716b27c705f289d6f7f32bb73a18ed53b7a0028f30fcd1d7f3906f5087aaa"
+  inputs-digest = "8231595c752fdf2d3c5a412ea10826718df940e6afb2c9e501aa79ee84704dba"
   solver-name = "gps-cdcl"
   solver-version = 1

Gopkg.toml

@@ -24,6 +24,10 @@
   name = "github.com/Luzifer/rconfig"
   version = "1.2.0"
 
+[[constraint]]
+  name = "github.com/flosch/pongo2"
+  version = "3.0.0"
+
 [[constraint]]
   name = "github.com/google/go-github"
   version = "15.0.0"

main.go

@@ -9,13 +9,12 @@ import (
 	"os"
 	"regexp"
 	"strings"
-	"text/template"
 
 	"golang.org/x/oauth2"
 
 	"github.com/Luzifer/rconfig"
+	"github.com/flosch/pongo2"
 	"github.com/google/go-github/github"
-	"github.com/gosimple/slug"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -170,33 +169,29 @@ func render(repo *github.Repository) error {
 		return err
 	}
 
-	tpl, err := template.New("output").Funcs(tplFuncs()).Parse(string(tplRaw))
+	tpl, err := pongo2.FromString(string(tplRaw))
 	if err != nil {
 		return err
 	}
 
-	return tpl.Execute(outFile, repo)
+	return tpl.ExecuteWriter(pongo2.Context{
+		"repo": repo,
+	}, outFile)
 }
 
 func getOutfile(repo *github.Repository) (string, error) {
-	tpl, err := template.New("outfile").Funcs(tplFuncs()).Parse(cfg.Output)
+	tpl, err := pongo2.FromString(cfg.Output)
 	if err != nil {
 		return "", err
 	}
 	buf := new(bytes.Buffer)
 
-	err = tpl.Execute(buf, repo)
+	err = tpl.ExecuteWriter(pongo2.Context{
+		"repo": repo,
+	}, buf)
 	return buf.String(), err
 }
 
 func simpleReplace(s, old, new string) string {
 	return strings.Replace(s, old, new, -1)
 }
-
-func tplFuncs() template.FuncMap {
-	return template.FuncMap{
-		"chkPtrBool": func(i *bool) bool { return i != nil && *i },
-		"slugify":    slug.Make,
-		"replace":    simpleReplace,
-	}
-}

template.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"strings"
+
+	"github.com/flosch/pongo2"
+	"github.com/gosimple/slug"
+)
+
+func init() {
+	pongo2.RegisterFilter("groovy_save", tplGroovyFileSave)
+	pongo2.RegisterFilter("slugify", tplSlugify)
+}
+
+func tplSlugify(in, param *pongo2.Value) (*pongo2.Value, *pongo2.Error) {
+	return pongo2.AsValue(slug.Make(in.String())), nil
+}
+
+func tplGroovyFileSave(in, param *pongo2.Value) (*pongo2.Value, *pongo2.Error) {
+	return pongo2.AsValue(strings.Replace(in.String(), "-", "_", -1)), nil
+}

vendor/github.com/flosch/pongo2/.gitignore

@@ -0,0 +1,40 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+.idea
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+
+.project
+EBNF.txt
+test1.tpl
+pongo2_internal_test.go
+tpl-error.out
+/count.out
+/cover.out
+*.swp
+*.iml
+/cpu.out
+/mem.out
+/pongo2.test
+*.error
+/profile
+/coverage.out
+/pongo2_internal_test.ignore

vendor/github.com/flosch/pongo2/.travis.yml

@@ -0,0 +1,12 @@
+language: go
+
+go:
+  - 1.3
+  - tip
+install:
+  - go get code.google.com/p/go.tools/cmd/cover
+  - go get github.com/mattn/goveralls
+  - go get gopkg.in/check.v1
+script:
+  - go test -v -covermode=count -coverprofile=coverage.out -bench . -cpu 1,4
+  - '[ "${TRAVIS_PULL_REQUEST}" = "false" ] && $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci -repotoken $COVERALLS_TOKEN || true'

vendor/github.com/flosch/pongo2/AUTHORS

@@ -0,0 +1,10 @@
+Main author and maintainer of pongo2:
+
+* Florian Schlachter <flori@n-schlachter.de>
+
+Contributors (in no specific order):
+
+* @romanoaugusto88
+* @vitalbh
+
+Feel free to add yourself to the list or to modify your entry if you did a contribution.

vendor/github.com/flosch/pongo2/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-2014 Florian Schlachter
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/flosch/pongo2/README.md

@@ -0,0 +1,248 @@
+# [pongo](https://en.wikipedia.org/wiki/Pongo_%28genus%29)2
+
+[![GoDoc](https://godoc.org/github.com/flosch/pongo2?status.png)](https://godoc.org/github.com/flosch/pongo2)
+[![Build Status](https://travis-ci.org/flosch/pongo2.svg?branch=master)](https://travis-ci.org/flosch/pongo2)
+[![Coverage Status](https://coveralls.io/repos/flosch/pongo2/badge.png?branch=master)](https://coveralls.io/r/flosch/pongo2?branch=master)
+[![gratipay](http://img.shields.io/badge/gratipay-support%20pongo-brightgreen.svg)](https://gratipay.com/flosch/)
+[![Bountysource](https://www.bountysource.com/badge/tracker?tracker_id=3654947)](https://www.bountysource.com/trackers/3654947-pongo2?utm_source=3654947&utm_medium=shield&utm_campaign=TRACKER_BADGE)
+
+pongo2 is the successor of [pongo](https://github.com/flosch/pongo), a Django-syntax like templating-language.
+
+Install/update using `go get` (no dependencies required by pongo2):
+```
+go get -u github.com/flosch/pongo2
+```
+
+Please use the [issue tracker](https://github.com/flosch/pongo2/issues) if you're encountering any problems with pongo2 or if you need help with implementing tags or filters ([create a ticket!](https://github.com/flosch/pongo2/issues/new)). If possible, please use [playground](https://www.florian-schlachter.de/pongo2/) to create a short test case on what's wrong and include the link to the snippet in your issue.
+
+**New**: [Try pongo2 out in the pongo2 playground.](https://www.florian-schlachter.de/pongo2/)
+
+## First impression of a template
+
+```HTML+Django
+<html><head><title>Our admins and users</title></head>
+{# This is a short example to give you a quick overview of pongo2's syntax. #}
+
+{% macro user_details(user, is_admin=false) %}
+	<div class="user_item">
+		<!-- Let's indicate a user's good karma -->
+		<h2 {% if (user.karma >= 40) || (user.karma > calc_avg_karma(userlist)+5) %}
+			class="karma-good"{% endif %}>
+			
+			<!-- This will call user.String() automatically if available: -->
+			{{ user }}
+		</h2>
+
+		<!-- Will print a human-readable time duration like "3 weeks ago" -->
+		<p>This user registered {{ user.register_date|naturaltime }}.</p>
+		
+		<!-- Let's allow the users to write down their biography using markdown;
+		     we will only show the first 15 words as a preview -->
+		<p>The user's biography:</p>
+		<p>{{ user.biography|markdown|truncatewords_html:15 }}
+			<a href="/user/{{ user.id }}/">read more</a></p>
+		
+		{% if is_admin %}<p>This user is an admin!</p>{% endif %}
+	</div>
+{% endmacro %}
+
+<body>
+	<!-- Make use of the macro defined above to avoid repetitive HTML code
+	     since we want to use the same code for admins AND members -->
+	
+	<h1>Our admins</h1>
+	{% for admin in adminlist %}
+		{{ user_details(admin, true) }}
+	{% endfor %}
+	
+	<h1>Our members</h1>
+	{% for user in userlist %}
+		{{ user_details(user) }}
+	{% endfor %}
+</body>
+</html>
+```
+
+## Development status
+
+**Latest stable release**: v3.0 (`go get -u gopkg.in/flosch/pongo2.v3` / [`v3`](https://github.com/flosch/pongo2/tree/v3)-branch) [[read the announcement](https://www.florian-schlachter.de/post/pongo2-v3/)]
+
+**Current development**: v4 (`master`-branch)
+
+*Note*: With the release of pongo v4 the branch v2 will be deprecated.
+
+**Deprecated versions** (not supported anymore): v1
+
+| Topic                                | Status                                                                                 |
+| ------------------------------------ | -------------------------------------------------------------------------------------- |       
+| Django version compatibility:        | [1.7](https://docs.djangoproject.com/en/1.7/ref/templates/builtins/)                  |
+| *Missing* (planned) **filters**:     | none ([hints](https://github.com/flosch/pongo2/blob/master/filters_builtin.go#L3))     | 
+| *Missing* (planned) **tags**:        | none ([hints](https://github.com/flosch/pongo2/blob/master/tags.go#L3))                |
+
+Please also have a look on the [caveats](https://github.com/flosch/pongo2#caveats) and on the [official add-ons](https://github.com/flosch/pongo2#official).
+
+## Features (and new in pongo2)
+
+ * Entirely rewritten from the ground-up.
+ * [Advanced C-like expressions](https://github.com/flosch/pongo2/blob/master/template_tests/expressions.tpl).
+ * [Complex function calls within expressions](https://github.com/flosch/pongo2/blob/master/template_tests/function_calls_wrapper.tpl).
+ * [Easy API to create new filters and tags](http://godoc.org/github.com/flosch/pongo2#RegisterFilter) ([including parsing arguments](http://godoc.org/github.com/flosch/pongo2#Parser))
+ * Additional features:
+    * Macros including importing macros from other files (see [template_tests/macro.tpl](https://github.com/flosch/pongo2/blob/master/template_tests/macro.tpl))
+    * [Template sandboxing](https://godoc.org/github.com/flosch/pongo2#TemplateSet) ([directory patterns](http://golang.org/pkg/path/filepath/#Match), banned tags/filters)
+
+## Recent API changes within pongo2
+
+If you're using the `master`-branch of pongo2, you might be interested in this section. Since pongo2 is still in development (even though there is a first stable release!), there could be (backwards-incompatible) API changes over time. To keep track of these and therefore make it painless for you to adapt your codebase, I'll list them here.
+
+ * Function signature for tag and filter parsing/execution changed (`error` return type changed to `*Error`).
+ * `INodeEvaluator` has been removed and got replaced by `IEvaluator`. You can change your existing tags/filters by simply replacing the interface.
+ * Two new helper functions: [`RenderTemplateFile()`](https://godoc.org/github.com/flosch/pongo2#RenderTemplateFile) and [`RenderTemplateString()`](https://godoc.org/github.com/flosch/pongo2#RenderTemplateString).
+ * `Template.ExecuteRW()` is now [`Template.ExecuteWriter()`](https://godoc.org/github.com/flosch/pongo2#Template.ExecuteWriter)
+ * `Template.Execute*()` functions do now take a `pongo2.Context` directly (no pointer anymore).
+
+## How you can help
+
+ * Write [filters](https://github.com/flosch/pongo2/blob/master/filters_builtin.go#L3) / [tags](https://github.com/flosch/pongo2/blob/master/tags.go#L4) (see [tutorial](https://www.florian-schlachter.de/post/pongo2/)) by forking pongo2 and sending pull requests
+ * Write/improve code tests (use the following command to see what tests are missing: `go test -v -cover -covermode=count -coverprofile=cover.out && go tool cover -html=cover.out`)
+ * Write/improve template tests (see the `template_tests/` directory)
+ * Write middleware, libraries and websites using pongo2. :-)
+
+# Documentation
+
+For a documentation on how the templating language works you can [head over to the Django documentation](https://docs.djangoproject.com/en/dev/topics/templates/). pongo2 aims to be compatible with it.
+
+You can access pongo2's API documentation on [godoc](https://godoc.org/github.com/flosch/pongo2).
+
+## Blog post series
+
+ * [pongo2 v2 released](https://www.florian-schlachter.de/post/pongo2-v2/)
+ * [pongo2 1.0 released](https://www.florian-schlachter.de/post/pongo2-10/) [August 8th 2014]
+ * [pongo2 playground](https://www.florian-schlachter.de/post/pongo2-playground/) [August 1st 2014]
+ * [Release of pongo2 1.0-rc1 + pongo2-addons](https://www.florian-schlachter.de/post/pongo2-10-rc1/) [July 30th 2014]
+ * [Introduction to pongo2 + migration- and "how to write tags/filters"-tutorial.](https://www.florian-schlachter.de/post/pongo2/) [June 29th 2014]
+
+## Caveats 
+
+### Filters
+
+ * **date** / **time**: The `date` and `time` filter are taking the Golang specific time- and date-format (not Django's one) currently. [Take a look on the format here](http://golang.org/pkg/time/#Time.Format).
+ * **stringformat**: `stringformat` does **not** take Python's string format syntax as a parameter, instead it takes Go's. Essentially `{{ 3.14|stringformat:"pi is %.2f" }}` is `fmt.Sprintf("pi is %.2f", 3.14)`.
+ * **escape** / **force_escape**: Unlike Django's behaviour, the `escape`-filter is applied immediately. Therefore there is no need for a `force_escape`-filter yet.
+
+### Tags
+
+ * **for**: All the `forloop` fields (like `forloop.counter`) are written with a capital letter at the beginning. For example, the `counter` can be accessed by `forloop.Counter` and the parentloop by `forloop.Parentloop`.
+ * **now**: takes Go's time format (see **date** and **time**-filter).
+
+### Misc
+
+ * **not in-operator**: You can check whether a map/struct/string contains a key/field/substring by using the in-operator (or the negation of it):
+    `{% if key in map %}Key is in map{% else %}Key not in map{% endif %}` or `{% if !(key in map) %}Key is NOT in map{% else %}Key is in map{% endif %}`.
+
+# Add-ons, libraries and helpers
+
+## Official
+
+ * [ponginae](https://github.com/flosch/ponginae) - A web-framework for Go (using pongo2).
+ * [pongo2-tools](https://github.com/flosch/pongo2-tools) - Official tools and helpers for pongo2
+ * [pongo2-addons](https://github.com/flosch/pongo2-addons) - Official additional filters/tags for pongo2 (for example a **markdown**-filter). They are in their own repository because they're relying on 3rd-party-libraries.
+
+## 3rd-party
+
+ * [beego-pongo2](https://github.com/oal/beego-pongo2) - A tiny little helper for using Pongo2 with [Beego](https://github.com/astaxie/beego).
+ * [beego-pongo2.v2](https://github.com/ipfans/beego-pongo2.v2) - Same as `beego-pongo2`, but for pongo2 v2.
+ * [macaron-pongo2](https://github.com/macaron-contrib/pongo2) - pongo2 support for [Macaron](https://github.com/Unknwon/macaron), a modular web framework.
+ * [ginpongo2](https://github.com/ngerakines/ginpongo2) - middleware for [gin](github.com/gin-gonic/gin) to use pongo2 templates
+ * [pongo2-trans](https://github.com/fromYukki/pongo2trans) - `trans`-tag implementation for internationalization
+
+Please add your project to this list and send me a pull request when you've developed something nice for pongo2.
+
+# API-usage examples
+
+Please see the documentation for a full list of provided API methods.
+
+## A tiny example (template string)
+
+```Go
+// Compile the template first (i. e. creating the AST)
+tpl, err := pongo2.FromString("Hello {{ name|capfirst }}!")
+if err != nil {
+	panic(err)
+}
+// Now you can render the template with the given 
+// pongo2.Context how often you want to.
+out, err := tpl.Execute(pongo2.Context{"name": "florian"})
+if err != nil {
+	panic(err)
+}
+fmt.Println(out) // Output: Hello Florian!
+```
+
+## Example server-usage (template file)
+
+```Go
+package main
+
+import (
+	"github.com/flosch/pongo2"
+	"net/http"
+)
+
+// Pre-compiling the templates at application startup using the
+// little Must()-helper function (Must() will panic if FromFile()
+// or FromString() will return with an error - that's it).
+// It's faster to pre-compile it anywhere at startup and only
+// execute the template later.
+var tplExample = pongo2.Must(pongo2.FromFile("example.html"))
+
+func examplePage(w http.ResponseWriter, r *http.Request) {
+	// Execute the template per HTTP request
+	err := tplExample.ExecuteWriter(pongo2.Context{"query": r.FormValue("query")}, w)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}
+
+func main() {
+	http.HandleFunc("/", examplePage)
+	http.ListenAndServe(":8080", nil)
+}
+```
+
+# Benchmark
+
+The benchmarks have been run on the my machine (`Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz`) using the command:
+
+    go test -bench . -cpu 1,2,4,8
+
+All benchmarks are compiling (depends on the benchmark) and executing the `template_tests/complex.tpl` template.
+
+The results are:
+
+    BenchmarkExecuteComplexWithSandboxActive                50000             60450 ns/op
+    BenchmarkExecuteComplexWithSandboxActive-2              50000             56998 ns/op
+    BenchmarkExecuteComplexWithSandboxActive-4              50000             60343 ns/op
+    BenchmarkExecuteComplexWithSandboxActive-8              50000             64229 ns/op
+    BenchmarkCompileAndExecuteComplexWithSandboxActive      10000            164410 ns/op
+    BenchmarkCompileAndExecuteComplexWithSandboxActive-2    10000            156682 ns/op
+    BenchmarkCompileAndExecuteComplexWithSandboxActive-4    10000            164821 ns/op
+    BenchmarkCompileAndExecuteComplexWithSandboxActive-8    10000            171806 ns/op
+    BenchmarkParallelExecuteComplexWithSandboxActive        50000             60428 ns/op
+    BenchmarkParallelExecuteComplexWithSandboxActive-2      50000             31887 ns/op
+    BenchmarkParallelExecuteComplexWithSandboxActive-4     100000             22810 ns/op
+    BenchmarkParallelExecuteComplexWithSandboxActive-8     100000             18820 ns/op
+    BenchmarkExecuteComplexWithoutSandbox                   50000             56942 ns/op
+    BenchmarkExecuteComplexWithoutSandbox-2                 50000             56168 ns/op
+    BenchmarkExecuteComplexWithoutSandbox-4                 50000             57838 ns/op
+    BenchmarkExecuteComplexWithoutSandbox-8                 50000             60539 ns/op
+    BenchmarkCompileAndExecuteComplexWithoutSandbox         10000            162086 ns/op
+    BenchmarkCompileAndExecuteComplexWithoutSandbox-2       10000            159771 ns/op
+    BenchmarkCompileAndExecuteComplexWithoutSandbox-4       10000            163826 ns/op
+    BenchmarkCompileAndExecuteComplexWithoutSandbox-8       10000            169062 ns/op
+    BenchmarkParallelExecuteComplexWithoutSandbox           50000             57152 ns/op
+    BenchmarkParallelExecuteComplexWithoutSandbox-2         50000             30276 ns/op
+    BenchmarkParallelExecuteComplexWithoutSandbox-4        100000             22065 ns/op
+    BenchmarkParallelExecuteComplexWithoutSandbox-8        100000             18034 ns/op
+
+Benchmarked on October 2nd 2014.

vendor/github.com/flosch/pongo2/context.go

@@ -0,0 +1,122 @@
+package pongo2
+
+import (
+	"fmt"
+	"regexp"
+)
+
+var reIdentifiers = regexp.MustCompile("^[a-zA-Z0-9_]+$")
+
+// Use this Context type to provide constants, variables, instances or functions to your template.
+//
+// pongo2 automatically provides meta-information or functions through the "pongo2"-key.
+// Currently, context["pongo2"] contains the following keys:
+//  1. version: returns the version string
+//
+// Template examples for accessing items from your context:
+//     {{ myconstant }}
+//     {{ myfunc("test", 42) }}
+//     {{ user.name }}
+//     {{ pongo2.version }}
+type Context map[string]interface{}
+
+func (c Context) checkForValidIdentifiers() *Error {
+	for k, v := range c {
+		if !reIdentifiers.MatchString(k) {
+			return &Error{
+				Sender:   "checkForValidIdentifiers",
+				ErrorMsg: fmt.Sprintf("Context-key '%s' (value: '%+v') is not a valid identifier.", k, v),
+			}
+		}
+	}
+	return nil
+}
+
+func (c Context) Update(other Context) Context {
+	for k, v := range other {
+		c[k] = v
+	}
+	return c
+}
+
+// If you're writing a custom tag, your tag's Execute()-function will
+// have access to the ExecutionContext. This struct stores anything
+// about the current rendering process's Context including
+// the Context provided by the user (field Public).
+// You can safely use the Private context to provide data to the user's
+// template (like a 'forloop'-information). The Shared-context is used
+// to share data between tags. All ExecutionContexts share this context.
+//
+// Please be careful when accessing the Public data.
+// PLEASE DO NOT MODIFY THE PUBLIC CONTEXT (read-only).
+//
+// To create your own execution context within tags, use the
+// NewChildExecutionContext(parent) function.
+type ExecutionContext struct {
+	template *Template
+
+	Autoescape bool
+	Public     Context
+	Private    Context
+	Shared     Context
+}
+
+var pongo2MetaContext = Context{
+	"version": Version,
+}
+
+func newExecutionContext(tpl *Template, ctx Context) *ExecutionContext {
+	privateCtx := make(Context)
+
+	// Make the pongo2-related funcs/vars available to the context
+	privateCtx["pongo2"] = pongo2MetaContext
+
+	return &ExecutionContext{
+		template: tpl,
+
+		Public:     ctx,
+		Private:    privateCtx,
+		Autoescape: true,
+	}
+}
+
+func NewChildExecutionContext(parent *ExecutionContext) *ExecutionContext {
+	newctx := &ExecutionContext{
+		template: parent.template,
+
+		Public:     parent.Public,
+		Private:    make(Context),
+		Autoescape: parent.Autoescape,
+	}
+	newctx.Shared = parent.Shared
+
+	// Copy all existing private items
+	newctx.Private.Update(parent.Private)
+
+	return newctx
+}
+
+func (ctx *ExecutionContext) Error(msg string, token *Token) *Error {
+	filename := ctx.template.name
+	var line, col int
+	if token != nil {
+		// No tokens available
+		// TODO: Add location (from where?)
+		filename = token.Filename
+		line = token.Line
+		col = token.Col
+	}
+	return &Error{
+		Template: ctx.template,
+		Filename: filename,
+		Line:     line,
+		Column:   col,
+		Token:    token,
+		Sender:   "execution",
+		ErrorMsg: msg,
+	}
+}
+
+func (ctx *ExecutionContext) Logf(format string, args ...interface{}) {
+	ctx.template.set.logf(format, args...)
+}

vendor/github.com/flosch/pongo2/doc.go

@@ -0,0 +1,31 @@
+// A Django-syntax like template-engine
+//
+// Blog posts about pongo2 (including introduction and migration):
+// https://www.florian-schlachter.de/?tag=pongo2
+//
+// Complete documentation on the template language:
+// https://docs.djangoproject.com/en/dev/topics/templates/
+//
+// Try out pongo2 live in the pongo2 playground:
+// https://www.florian-schlachter.de/pongo2/
+//
+// Make sure to read README.md in the repository as well.
+//
+// A tiny example with template strings:
+//
+// (Snippet on playground: https://www.florian-schlachter.de/pongo2/?id=1206546277)
+//
+//     // Compile the template first (i. e. creating the AST)
+//     tpl, err := pongo2.FromString("Hello {{ name|capfirst }}!")
+//     if err != nil {
+//         panic(err)
+//     }
+//     // Now you can render the template with the given
+//     // pongo2.Context how often you want to.
+//     out, err := tpl.Execute(pongo2.Context{"name": "fred"})
+//     if err != nil {
+//         panic(err)
+//     }
+//     fmt.Println(out) // Output: Hello Fred!
+//
+package pongo2

vendor/github.com/flosch/pongo2/docs/examples.md

@@ -0,0 +1 @@
+(Stub, TBA)

vendor/github.com/flosch/pongo2/docs/filters.md

@@ -0,0 +1,68 @@
+TODO:
+
+* What are filters?
+* List+explain all existing filters (pongo2 + pongo2-addons)
+
+Implemented filters so far which needs documentation:
+
+* escape
+* safe
+* escapejs
+* add
+* addslashes
+* capfirst
+* center
+* cut
+* date
+* default
+* default_if_none
+* divisibleby
+* first
+* floatformat
+* get_digit
+* iriencode
+* join
+* last
+* length
+* length_is
+* linebreaks
+* linebreaksbr
+* linenumbers
+* ljust
+* lower
+* make_list
+* phone2numeric
+* pluralize
+* random
+* removetags
+* rjust
+* slice
+* stringformat
+* striptags
+* time
+* title
+* truncatechars
+* truncatechars_html
+* truncatewords
+* truncatewords_html
+* upper
+* urlencode
+* urlize
+* urlizetrunc
+* wordcount
+* wordwrap
+* yesno
+
+* filesizeformat*
+* slugify*
+* truncatesentences*
+* truncatesentences_html*
+* markdown*
+* intcomma*
+* ordinal*
+* naturalday*
+* timesince*
+* timeuntil*
+* naturaltime*
+
+Filters marked with * are available through [pongo2-addons](https://github.com/flosch/pongo2-addons).

vendor/github.com/flosch/pongo2/docs/index.md

@@ -0,0 +1 @@
+(Stub, TBA)

vendor/github.com/flosch/pongo2/docs/macros.md

@@ -0,0 +1 @@
+(Stub, TBA)

vendor/github.com/flosch/pongo2/docs/tags.md

@@ -0,0 +1,31 @@
+TODO:
+
+* What are tags?
+* List+explain all existing tags (pongo2 + pongo2-addons)
+
+Implemented tags so far which needs documentation:
+
+* autoescape
+* block
+* comment
+* cycle
+* extends
+* filter
+* firstof
+* for
+* if
+* ifchanged
+* ifequal
+* ifnotequal
+* import
+* include
+* lorem
+* macro
+* now
+* set
+* spaceless
+* ssi
+* templatetag
+* verbatim
+* widthratio
+* with

vendor/github.com/flosch/pongo2/docs/template_sets.md

@@ -0,0 +1 @@
+(Stub, TBA)

vendor/github.com/flosch/pongo2/error.go

@@ -0,0 +1,86 @@
+package pongo2
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+// This Error type is being used to address an error during lexing, parsing or
+// execution. If you want to return an error object (for example in your own
+// tag or filter) fill this object with as much information as you have.
+// Make sure "Sender" is always given (if you're returning an error within
+// a filter, make Sender equals 'filter:yourfilter'; same goes for tags: 'tag:mytag').
+// It's okay if you only fill in ErrorMsg if you don't have any other details at hand.
+type Error struct {
+	Template *Template
+	Filename string
+	Line     int
+	Column   int
+	Token    *Token
+	Sender   string
+	ErrorMsg string
+}
+
+func (e *Error) updateFromTokenIfNeeded(template *Template, t *Token) *Error {
+	if e.Template == nil {
+		e.Template = template
+	}
+
+	if e.Token == nil {
+		e.Token = t
+		if e.Line <= 0 {
+			e.Line = t.Line
+			e.Column = t.Col
+		}
+	}
+
+	return e
+}
+
+// Returns a nice formatted error string.
+func (e *Error) Error() string {
+	s := "[Error"
+	if e.Sender != "" {
+		s += " (where: " + e.Sender + ")"
+	}
+	if e.Filename != "" {
+		s += " in " + e.Filename
+	}
+	if e.Line > 0 {
+		s += fmt.Sprintf(" | Line %d Col %d", e.Line, e.Column)
+		if e.Token != nil {
+			s += fmt.Sprintf(" near '%s'", e.Token.Val)
+		}
+	}
+	s += "] "
+	s += e.ErrorMsg
+	return s
+}
+
+// Returns the affected line from the original template, if available.
+func (e *Error) RawLine() (line string, available bool) {
+	if e.Line <= 0 || e.Filename == "<string>" {
+		return "", false
+	}
+
+	filename := e.Filename
+	if e.Template != nil {
+		filename = e.Template.set.resolveFilename(e.Template, e.Filename)
+	}
+	file, err := os.Open(filename)
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	l := 0
+	for scanner.Scan() {
+		l++
+		if l == e.Line {
+			return scanner.Text(), true
+		}
+	}
+	return "", false
+}

vendor/github.com/flosch/pongo2/filters.go

@@ -0,0 +1,133 @@
+package pongo2
+
+import (
+	"fmt"
+)
+
+type FilterFunction func(in *Value, param *Value) (out *Value, err *Error)
+
+var filters map[string]FilterFunction
+
+func init() {
+	filters = make(map[string]FilterFunction)
+}
+
+// Registers a new filter. If there's already a filter with the same
+// name, RegisterFilter will panic. You usually want to call this
+// function in the filter's init() function:
+// http://golang.org/doc/effective_go.html#init
+//
+// See http://www.florian-schlachter.de/post/pongo2/ for more about
+// writing filters and tags.
+func RegisterFilter(name string, fn FilterFunction) {
+	_, existing := filters[name]
+	if existing {
+		panic(fmt.Sprintf("Filter with name '%s' is already registered.", name))
+	}
+	filters[name] = fn
+}
+
+// Replaces an already registered filter with a new implementation. Use this
+// function with caution since it allows you to change existing filter behaviour.
+func ReplaceFilter(name string, fn FilterFunction) {
+	_, existing := filters[name]
+	if !existing {
+		panic(fmt.Sprintf("Filter with name '%s' does not exist (therefore cannot be overridden).", name))
+	}
+	filters[name] = fn
+}
+
+// Like ApplyFilter, but panics on an error
+func MustApplyFilter(name string, value *Value, param *Value) *Value {
+	val, err := ApplyFilter(name, value, param)
+	if err != nil {
+		panic(err)
+	}
+	return val
+}
+
+// Applies a filter to a given value using the given parameters. Returns a *pongo2.Value or an error.
+func ApplyFilter(name string, value *Value, param *Value) (*Value, *Error) {
+	fn, existing := filters[name]
+	if !existing {
+		return nil, &Error{
+			Sender:   "applyfilter",
+			ErrorMsg: fmt.Sprintf("Filter with name '%s' not found.", name),
+		}
+	}
+
+	// Make sure param is a *Value
+	if param == nil {
+		param = AsValue(nil)
+	}
+
+	return fn(value, param)
+}
+
+type filterCall struct {
+	token *Token
+
+	name      string
+	parameter IEvaluator
+
+	filterFunc FilterFunction
+}
+
+func (fc *filterCall) Execute(v *Value, ctx *ExecutionContext) (*Value, *Error) {
+	var param *Value
+	var err *Error
+
+	if fc.parameter != nil {
+		param, err = fc.parameter.Evaluate(ctx)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		param = AsValue(nil)
+	}
+
+	filtered_value, err := fc.filterFunc(v, param)
+	if err != nil {
+		return nil, err.updateFromTokenIfNeeded(ctx.template, fc.token)
+	}
+	return filtered_value, nil
+}
+
+// Filter = IDENT | IDENT ":" FilterArg | IDENT "|" Filter
+func (p *Parser) parseFilter() (*filterCall, *Error) {
+	ident_token := p.MatchType(TokenIdentifier)
+
+	// Check filter ident
+	if ident_token == nil {
+		return nil, p.Error("Filter name must be an identifier.", nil)
+	}
+
+	filter := &filterCall{
+		token: ident_token,
+		name:  ident_token.Val,
+	}
+
+	// Get the appropriate filter function and bind it
+	filterFn, exists := filters[ident_token.Val]
+	if !exists {
+		return nil, p.Error(fmt.Sprintf("Filter '%s' does not exist.", ident_token.Val), ident_token)
+	}
+
+	filter.filterFunc = filterFn
+
+	// Check for filter-argument (2 tokens needed: ':' ARG)
+	if p.Match(TokenSymbol, ":") != nil {
+		if p.Peek(TokenSymbol, "}}") != nil {
+			return nil, p.Error("Filter parameter required after ':'.", nil)
+		}
+
+		// Get filter argument expression
+		v, err := p.parseVariableOrLiteral()
+		if err != nil {
+			return nil, err
+		}
+		filter.parameter = v
+	}
+
+	return filter, nil
+}

vendor/github.com/flosch/pongo2/filters_builtin.go

@@ -0,0 +1,903 @@
+package pongo2
+
+/* Filters that are provided through github.com/flosch/pongo2-addons:
+   ------------------------------------------------------------------
+
+   filesizeformat
+   slugify
+   timesince
+   timeuntil
+
+   Filters that won't be added:
+   ----------------------------
+
+   get_static_prefix (reason: web-framework specific)
+   pprint (reason: python-specific)
+   static (reason: web-framework specific)
+
+   Reconsideration (not implemented yet):
+   --------------------------------------
+
+   force_escape (reason: not yet needed since this is the behaviour of pongo2's escape filter)
+   safeseq (reason: same reason as `force_escape`)
+   unordered_list (python-specific; not sure whether needed or not)
+   dictsort (python-specific; maybe one could add a filter to sort a list of structs by a specific field name)
+   dictsortreversed (see dictsort)
+*/
+
+import (
+	"bytes"
+	"fmt"
+	"math/rand"
+	"net/url"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+	"unicode/utf8"
+)
+
+func init() {
+	rand.Seed(time.Now().Unix())
+
+	RegisterFilter("escape", filterEscape)
+	RegisterFilter("safe", filterSafe)
+	RegisterFilter("escapejs", filterEscapejs)
+
+	RegisterFilter("add", filterAdd)
+	RegisterFilter("addslashes", filterAddslashes)
+	RegisterFilter("capfirst", filterCapfirst)
+	RegisterFilter("center", filterCenter)
+	RegisterFilter("cut", filterCut)
+	RegisterFilter("date", filterDate)
+	RegisterFilter("default", filterDefault)
+	RegisterFilter("default_if_none", filterDefaultIfNone)
+	RegisterFilter("divisibleby", filterDivisibleby)
+	RegisterFilter("first", filterFirst)
+	RegisterFilter("floatformat", filterFloatformat)
+	RegisterFilter("get_digit", filterGetdigit)
+	RegisterFilter("iriencode", filterIriencode)
+	RegisterFilter("join", filterJoin)
+	RegisterFilter("last", filterLast)
+	RegisterFilter("length", filterLength)
+	RegisterFilter("length_is", filterLengthis)
+	RegisterFilter("linebreaks", filterLinebreaks)
+	RegisterFilter("linebreaksbr", filterLinebreaksbr)
+	RegisterFilter("linenumbers", filterLinenumbers)
+	RegisterFilter("ljust", filterLjust)
+	RegisterFilter("lower", filterLower)
+	RegisterFilter("make_list", filterMakelist)
+	RegisterFilter("phone2numeric", filterPhone2numeric)
+	RegisterFilter("pluralize", filterPluralize)
+	RegisterFilter("random", filterRandom)
+	RegisterFilter("removetags", filterRemovetags)
+	RegisterFilter("rjust", filterRjust)
+	RegisterFilter("slice", filterSlice)
+	RegisterFilter("stringformat", filterStringformat)
+	RegisterFilter("striptags", filterStriptags)
+	RegisterFilter("time", filterDate) // time uses filterDate (same golang-format)
+	RegisterFilter("title", filterTitle)
+	RegisterFilter("truncatechars", filterTruncatechars)
+	RegisterFilter("truncatechars_html", filterTruncatecharsHtml)
+	RegisterFilter("truncatewords", filterTruncatewords)
+	RegisterFilter("truncatewords_html", filterTruncatewordsHtml)
+	RegisterFilter("upper", filterUpper)
+	RegisterFilter("urlencode", filterUrlencode)
+	RegisterFilter("urlize", filterUrlize)
+	RegisterFilter("urlizetrunc", filterUrlizetrunc)
+	RegisterFilter("wordcount", filterWordcount)
+	RegisterFilter("wordwrap", filterWordwrap)
+	RegisterFilter("yesno", filterYesno)
+
+	RegisterFilter("float", filterFloat)     // pongo-specific
+	RegisterFilter("integer", filterInteger) // pongo-specific
+}
+
+func filterTruncatecharsHelper(s string, newLen int) string {
+	runes := []rune(s)
+	if newLen < len(runes) {
+		if newLen >= 3 {
+			return fmt.Sprintf("%s...", string(runes[:newLen-3]))
+		}
+		// Not enough space for the ellipsis
+		return string(runes[:newLen])
+	}
+	return string(runes)
+}
+
+func filterTruncateHtmlHelper(value string, new_output *bytes.Buffer, cond func() bool, fn func(c rune, s int, idx int) int, finalize func()) {
+	vLen := len(value)
+	tag_stack := make([]string, 0)
+	idx := 0
+
+	for idx < vLen && !cond() {
+		c, s := utf8.DecodeRuneInString(value[idx:])
+		if c == utf8.RuneError {
+			idx += s
+			continue
+		}
+
+		if c == '<' {
+			new_output.WriteRune(c)
+			idx += s // consume "<"
+
+			if idx+1 < vLen {
+				if value[idx] == '/' {
+					// Close tag
+
+					new_output.WriteString("/")
+
+					tag := ""
+					idx += 1 // consume "/"
+
+					for idx < vLen {
+						c2, size2 := utf8.DecodeRuneInString(value[idx:])
+						if c2 == utf8.RuneError {
+							idx += size2
+							continue
+						}
+
+						// End of tag found
+						if c2 == '>' {
+							idx++ // consume ">"
+							break
+						}
+						tag += string(c2)
+						idx += size2
+					}
+
+					if len(tag_stack) > 0 {
+						// Ideally, the close tag is TOP of tag stack
+						// In malformed HTML, it must not be, so iterate through the stack and remove the tag
+						for i := len(tag_stack) - 1; i >= 0; i-- {
+							if tag_stack[i] == tag {
+								// Found the tag
+								tag_stack[i] = tag_stack[len(tag_stack)-1]
+								tag_stack = tag_stack[:len(tag_stack)-1]
+								break
+							}
+						}
+					}
+
+					new_output.WriteString(tag)
+					new_output.WriteString(">")
+				} else {
+					// Open tag
+
+					tag := ""
+
+					params := false
+					for idx < vLen {
+						c2, size2 := utf8.DecodeRuneInString(value[idx:])
+						if c2 == utf8.RuneError {
+							idx += size2
+							continue
+						}
+
+						new_output.WriteRune(c2)
+
+						// End of tag found
+						if c2 == '>' {
+							idx++ // consume ">"
+							break
+						}
+
+						if !params {
+							if c2 == ' ' {
+								params = true
+							} else {
+								tag += string(c2)
+							}
+						}
+
+						idx += size2
+					}
+
+					// Add tag to stack
+					tag_stack = append(tag_stack, tag)
+				}
+			}
+		} else {
+			idx = fn(c, s, idx)
+		}
+	}
+
+	finalize()
+
+	for i := len(tag_stack) - 1; i >= 0; i-- {
+		tag := tag_stack[i]
+		// Close everything from the regular tag stack
+		new_output.WriteString(fmt.Sprintf("</%s>", tag))
+	}
+}
+
+func filterTruncatechars(in *Value, param *Value) (*Value, *Error) {
+	s := in.String()
+	newLen := param.Integer()
+	return AsValue(filterTruncatecharsHelper(s, newLen)), nil
+}
+
+func filterTruncatecharsHtml(in *Value, param *Value) (*Value, *Error) {
+	value := in.String()
+	newLen := max(param.Integer()-3, 0)
+
+	new_output := bytes.NewBuffer(nil)
+
+	textcounter := 0
+
+	filterTruncateHtmlHelper(value, new_output, func() bool {
+		return textcounter >= newLen
+	}, func(c rune, s int, idx int) int {
+		textcounter++
+		new_output.WriteRune(c)
+
+		return idx + s
+	}, func() {
+		if textcounter >= newLen && textcounter < len(value) {
+			new_output.WriteString("...")
+		}
+	})
+
+	return AsSafeValue(new_output.String()), nil
+}
+
+func filterTruncatewords(in *Value, param *Value) (*Value, *Error) {
+	words := strings.Fields(in.String())
+	n := param.Integer()
+	if n <= 0 {
+		return AsValue(""), nil
+	}
+	nlen := min(len(words), n)
+	out := make([]string, 0, nlen)
+	for i := 0; i < nlen; i++ {
+		out = append(out, words[i])
+	}
+
+	if n < len(words) {
+		out = append(out, "...")
+	}
+
+	return AsValue(strings.Join(out, " ")), nil
+}
+
+func filterTruncatewordsHtml(in *Value, param *Value) (*Value, *Error) {
+	value := in.String()
+	newLen := max(param.Integer(), 0)
+
+	new_output := bytes.NewBuffer(nil)
+
+	wordcounter := 0
+
+	filterTruncateHtmlHelper(value, new_output, func() bool {
+		return wordcounter >= newLen
+	}, func(_ rune, _ int, idx int) int {
+		// Get next word
+		word_found := false
+
+		for idx < len(value) {
+			c2, size2 := utf8.DecodeRuneInString(value[idx:])
+			if c2 == utf8.RuneError {
+				idx += size2
+				continue
+			}
+
+			if c2 == '<' {
+				// HTML tag start, don't consume it
+				return idx
+			}
+
+			new_output.WriteRune(c2)
+			idx += size2
+
+			if c2 == ' ' || c2 == '.' || c2 == ',' || c2 == ';' {
+				// Word ends here, stop capturing it now
+				break
+			} else {
+				word_found = true
+			}
+		}
+
+		if word_found {
+			wordcounter++
+		}
+
+		return idx
+	}, func() {
+		if wordcounter >= newLen {
+			new_output.WriteString("...")
+		}
+	})
+
+	return AsSafeValue(new_output.String()), nil
+}
+
+func filterEscape(in *Value, param *Value) (*Value, *Error) {
+	output := strings.Replace(in.String(), "&", "&amp;", -1)
+	output = strings.Replace(output, ">", "&gt;", -1)
+	output = strings.Replace(output, "<", "&lt;", -1)
+	output = strings.Replace(output, "\"", "&quot;", -1)
+	output = strings.Replace(output, "'", "&#39;", -1)
+	return AsValue(output), nil
+}
+
+func filterSafe(in *Value, param *Value) (*Value, *Error) {
+	return in, nil // nothing to do here, just to keep track of the safe application
+}
+
+func filterEscapejs(in *Value, param *Value) (*Value, *Error) {
+	sin := in.String()
+
+	var b bytes.Buffer
+
+	idx := 0
+	for idx < len(sin) {
+		c, size := utf8.DecodeRuneInString(sin[idx:])
+		if c == utf8.RuneError {
+			idx += size
+			continue
+		}
+
+		if c == '\\' {
+			// Escape seq?
+			if idx+1 < len(sin) {
+				switch sin[idx+1] {
+				case 'r':
+					b.WriteString(fmt.Sprintf(`\u%04X`, '\r'))
+					idx += 2
+					continue
+				case 'n':
+					b.WriteString(fmt.Sprintf(`\u%04X`, '\n'))
+					idx += 2
+					continue
+					/*case '\'':
+						b.WriteString(fmt.Sprintf(`\u%04X`, '\''))
+						idx += 2
+						continue
+					case '"':
+						b.WriteString(fmt.Sprintf(`\u%04X`, '"'))
+						idx += 2
+						continue*/
+				}
+			}
+		}
+
+		if (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == ' ' || c == '/' {
+			b.WriteRune(c)
+		} else {
+			b.WriteString(fmt.Sprintf(`\u%04X`, c))
+		}
+
+		idx += size
+	}
+
+	return AsValue(b.String()), nil
+}
+
+func filterAdd(in *Value, param *Value) (*Value, *Error) {
+	if in.IsNumber() && param.IsNumber() {
+		if in.IsFloat() || param.IsFloat() {
+			return AsValue(in.Float() + param.Float()), nil
+		} else {
+			return AsValue(in.Integer() + param.Integer()), nil
+		}
+	}
+	// If in/param is not a number, we're relying on the
+	// Value's String() convertion and just add them both together
+	return AsValue(in.String() + param.String()), nil
+}
+
+func filterAddslashes(in *Value, param *Value) (*Value, *Error) {
+	output := strings.Replace(in.String(), "\\", "\\\\", -1)
+	output = strings.Replace(output, "\"", "\\\"", -1)
+	output = strings.Replace(output, "'", "\\'", -1)
+	return AsValue(output), nil
+}
+
+func filterCut(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(strings.Replace(in.String(), param.String(), "", -1)), nil
+}
+
+func filterLength(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(in.Len()), nil
+}
+
+func filterLengthis(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(in.Len() == param.Integer()), nil
+}
+
+func filterDefault(in *Value, param *Value) (*Value, *Error) {
+	if !in.IsTrue() {
+		return param, nil
+	}
+	return in, nil
+}
+
+func filterDefaultIfNone(in *Value, param *Value) (*Value, *Error) {
+	if in.IsNil() {
+		return param, nil
+	}
+	return in, nil
+}
+
+func filterDivisibleby(in *Value, param *Value) (*Value, *Error) {
+	if param.Integer() == 0 {
+		return AsValue(false), nil
+	}
+	return AsValue(in.Integer()%param.Integer() == 0), nil
+}
+
+func filterFirst(in *Value, param *Value) (*Value, *Error) {
+	if in.CanSlice() && in.Len() > 0 {
+		return in.Index(0), nil
+	}
+	return AsValue(""), nil
+}
+
+func filterFloatformat(in *Value, param *Value) (*Value, *Error) {
+	val := in.Float()
+
+	decimals := -1
+	if !param.IsNil() {
+		// Any argument provided?
+		decimals = param.Integer()
+	}
+
+	// if the argument is not a number (e. g. empty), the default
+	// behaviour is trim the result
+	trim := !param.IsNumber()
+
+	if decimals <= 0 {
+		// argument is negative or zero, so we
+		// want the output being trimmed
+		decimals = -decimals
+		trim = true
+	}
+
+	if trim {
+		// Remove zeroes
+		if float64(int(val)) == val {
+			return AsValue(in.Integer()), nil
+		}
+	}
+
+	return AsValue(strconv.FormatFloat(val, 'f', decimals, 64)), nil
+}
+
+func filterGetdigit(in *Value, param *Value) (*Value, *Error) {
+	i := param.Integer()
+	l := len(in.String()) // do NOT use in.Len() here!
+	if i <= 0 || i > l {
+		return in, nil
+	}
+	return AsValue(in.String()[l-i] - 48), nil
+}
+
+const filterIRIChars = "/#%[]=:;$&()+,!?*@'~"
+
+func filterIriencode(in *Value, param *Value) (*Value, *Error) {
+	var b bytes.Buffer
+
+	sin := in.String()
+	for _, r := range sin {
+		if strings.IndexRune(filterIRIChars, r) >= 0 {
+			b.WriteRune(r)
+		} else {
+			b.WriteString(url.QueryEscape(string(r)))
+		}
+	}
+
+	return AsValue(b.String()), nil
+}
+
+func filterJoin(in *Value, param *Value) (*Value, *Error) {
+	if !in.CanSlice() {
+		return in, nil
+	}
+	sep := param.String()
+	sl := make([]string, 0, in.Len())
+	for i := 0; i < in.Len(); i++ {
+		sl = append(sl, in.Index(i).String())
+	}
+	return AsValue(strings.Join(sl, sep)), nil
+}
+
+func filterLast(in *Value, param *Value) (*Value, *Error) {
+	if in.CanSlice() && in.Len() > 0 {
+		return in.Index(in.Len() - 1), nil
+	}
+	return AsValue(""), nil
+}
+
+func filterUpper(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(strings.ToUpper(in.String())), nil
+}
+
+func filterLower(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(strings.ToLower(in.String())), nil
+}
+
+func filterMakelist(in *Value, param *Value) (*Value, *Error) {
+	s := in.String()
+	result := make([]string, 0, len(s))
+	for _, c := range s {
+		result = append(result, string(c))
+	}
+	return AsValue(result), nil
+}
+
+func filterCapfirst(in *Value, param *Value) (*Value, *Error) {
+	if in.Len() <= 0 {
+		return AsValue(""), nil
+	}
+	t := in.String()
+	r, size := utf8.DecodeRuneInString(t)
+	return AsValue(strings.ToUpper(string(r)) + t[size:]), nil
+}
+
+func filterCenter(in *Value, param *Value) (*Value, *Error) {
+	width := param.Integer()
+	slen := in.Len()
+	if width <= slen {
+		return in, nil
+	}
+
+	spaces := width - slen
+	left := spaces/2 + spaces%2
+	right := spaces / 2
+
+	return AsValue(fmt.Sprintf("%s%s%s", strings.Repeat(" ", left),
+		in.String(), strings.Repeat(" ", right))), nil
+}
+
+func filterDate(in *Value, param *Value) (*Value, *Error) {
+	t, is_time := in.Interface().(time.Time)
+	if !is_time {
+		return nil, &Error{
+			Sender:   "filter:date",
+			ErrorMsg: "Filter input argument must be of type 'time.Time'.",
+		}
+	}
+	return AsValue(t.Format(param.String())), nil
+}
+
+func filterFloat(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(in.Float()), nil
+}
+
+func filterInteger(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(in.Integer()), nil
+}
+
+func filterLinebreaks(in *Value, param *Value) (*Value, *Error) {
+	if in.Len() == 0 {
+		return in, nil
+	}
+
+	var b bytes.Buffer
+
+	// Newline = <br />
+	// Double newline = <p>...</p>
+	lines := strings.Split(in.String(), "\n")
+	lenlines := len(lines)
+
+	opened := false
+
+	for idx, line := range lines {
+
+		if !opened {
+			b.WriteString("<p>")
+			opened = true
+		}
+
+		b.WriteString(line)
+
+		if idx < lenlines-1 && strings.TrimSpace(lines[idx]) != "" {
+			// We've not reached the end
+			if strings.TrimSpace(lines[idx+1]) == "" {
+				// Next line is empty
+				if opened {
+					b.WriteString("</p>")
+					opened = false
+				}
+			} else {
+				b.WriteString("<br />")
+			}
+		}
+	}
+
+	if opened {
+		b.WriteString("</p>")
+	}
+
+	return AsValue(b.String()), nil
+}
+
+func filterLinebreaksbr(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(strings.Replace(in.String(), "\n", "<br />", -1)), nil
+}
+
+func filterLinenumbers(in *Value, param *Value) (*Value, *Error) {
+	lines := strings.Split(in.String(), "\n")
+	output := make([]string, 0, len(lines))
+	for idx, line := range lines {
+		output = append(output, fmt.Sprintf("%d. %s", idx+1, line))
+	}
+	return AsValue(strings.Join(output, "\n")), nil
+}
+
+func filterLjust(in *Value, param *Value) (*Value, *Error) {
+	times := param.Integer() - in.Len()
+	if times < 0 {
+		times = 0
+	}
+	return AsValue(fmt.Sprintf("%s%s", in.String(), strings.Repeat(" ", times))), nil
+}
+
+func filterUrlencode(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(url.QueryEscape(in.String())), nil
+}
+
+// TODO: This regexp could do some work
+var filterUrlizeURLRegexp = regexp.MustCompile(`((((http|https)://)|www\.|((^|[ ])[0-9A-Za-z_\-]+(\.com|\.net|\.org|\.info|\.biz|\.de))))(?U:.*)([ ]+|$)`)
+var filterUrlizeEmailRegexp = regexp.MustCompile(`(\w+@\w+\.\w{2,4})`)
+
+func filterUrlizeHelper(input string, autoescape bool, trunc int) string {
+	sout := filterUrlizeURLRegexp.ReplaceAllStringFunc(input, func(raw_url string) string {
+		var prefix string
+		var suffix string
+		if strings.HasPrefix(raw_url, " ") {
+			prefix = " "
+		}
+		if strings.HasSuffix(raw_url, " ") {
+			suffix = " "
+		}
+
+		raw_url = strings.TrimSpace(raw_url)
+
+		t, err := ApplyFilter("iriencode", AsValue(raw_url), nil)
+		if err != nil {
+			panic(err)
+		}
+		url := t.String()
+
+		if !strings.HasPrefix(url, "http") {
+			url = fmt.Sprintf("http://%s", url)
+		}
+
+		title := raw_url
+
+		if trunc > 3 && len(title) > trunc {
+			title = fmt.Sprintf("%s...", title[:trunc-3])
+		}
+
+		if autoescape {
+			t, err := ApplyFilter("escape", AsValue(title), nil)
+			if err != nil {
+				panic(err)
+			}
+			title = t.String()
+		}
+
+		return fmt.Sprintf(`%s<a href="%s" rel="nofollow">%s</a>%s`, prefix, url, title, suffix)
+	})
+
+	sout = filterUrlizeEmailRegexp.ReplaceAllStringFunc(sout, func(mail string) string {
+
+		title := mail
+
+		if trunc > 3 && len(title) > trunc {
+			title = fmt.Sprintf("%s...", title[:trunc-3])
+		}
+
+		return fmt.Sprintf(`<a href="mailto:%s">%s</a>`, mail, title)
+	})
+
+	return sout
+}
+
+func filterUrlize(in *Value, param *Value) (*Value, *Error) {
+	autoescape := true
+	if param.IsBool() {
+		autoescape = param.Bool()
+	}
+
+	return AsValue(filterUrlizeHelper(in.String(), autoescape, -1)), nil
+}
+
+func filterUrlizetrunc(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(filterUrlizeHelper(in.String(), true, param.Integer())), nil
+}
+
+func filterStringformat(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(fmt.Sprintf(param.String(), in.Interface())), nil
+}
+
+var re_striptags = regexp.MustCompile("<[^>]*?>")
+
+func filterStriptags(in *Value, param *Value) (*Value, *Error) {
+	s := in.String()
+
+	// Strip all tags
+	s = re_striptags.ReplaceAllString(s, "")
+
+	return AsValue(strings.TrimSpace(s)), nil
+}
+
+// https://en.wikipedia.org/wiki/Phoneword
+var filterPhone2numericMap = map[string]string{
+	"a": "2", "b": "2", "c": "2", "d": "3", "e": "3", "f": "3", "g": "4", "h": "4", "i": "4", "j": "5", "k": "5",
+	"l": "5", "m": "6", "n": "6", "o": "6", "p": "7", "q": "7", "r": "7", "s": "7", "t": "8", "u": "8", "v": "8",
+	"w": "9", "x": "9", "y": "9", "z": "9",
+}
+
+func filterPhone2numeric(in *Value, param *Value) (*Value, *Error) {
+	sin := in.String()
+	for k, v := range filterPhone2numericMap {
+		sin = strings.Replace(sin, k, v, -1)
+		sin = strings.Replace(sin, strings.ToUpper(k), v, -1)
+	}
+	return AsValue(sin), nil
+}
+
+func filterPluralize(in *Value, param *Value) (*Value, *Error) {
+	if in.IsNumber() {
+		// Works only on numbers
+		if param.Len() > 0 {
+			endings := strings.Split(param.String(), ",")
+			if len(endings) > 2 {
+				return nil, &Error{
+					Sender:   "filter:pluralize",
+					ErrorMsg: "You cannot pass more than 2 arguments to filter 'pluralize'.",
+				}
+			}
+			if len(endings) == 1 {
+				// 1 argument
+				if in.Integer() != 1 {
+					return AsValue(endings[0]), nil
+				}
+			} else {
+				if in.Integer() != 1 {
+					// 2 arguments
+					return AsValue(endings[1]), nil
+				}
+				return AsValue(endings[0]), nil
+			}
+		} else {
+			if in.Integer() != 1 {
+				// return default 's'
+				return AsValue("s"), nil
+			}
+		}
+
+		return AsValue(""), nil
+	} else {
+		return nil, &Error{
+			Sender:   "filter:pluralize",
+			ErrorMsg: "Filter 'pluralize' does only work on numbers.",
+		}
+	}
+}
+
+func filterRandom(in *Value, param *Value) (*Value, *Error) {
+	if !in.CanSlice() || in.Len() <= 0 {
+		return in, nil
+	}
+	i := rand.Intn(in.Len())
+	return in.Index(i), nil
+}
+
+func filterRemovetags(in *Value, param *Value) (*Value, *Error) {
+	s := in.String()
+	tags := strings.Split(param.String(), ",")
+
+	// Strip only specific tags
+	for _, tag := range tags {
+		re := regexp.MustCompile(fmt.Sprintf("</?%s/?>", tag))
+		s = re.ReplaceAllString(s, "")
+	}
+
+	return AsValue(strings.TrimSpace(s)), nil
+}
+
+func filterRjust(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(fmt.Sprintf(fmt.Sprintf("%%%ds", param.Integer()), in.String())), nil
+}
+
+func filterSlice(in *Value, param *Value) (*Value, *Error) {
+	comp := strings.Split(param.String(), ":")
+	if len(comp) != 2 {
+		return nil, &Error{
+			Sender:   "filter:slice",
+			ErrorMsg: "Slice string must have the format 'from:to' [from/to can be omitted, but the ':' is required]",
+		}
+	}
+
+	if !in.CanSlice() {
+		return in, nil
+	}
+
+	from := AsValue(comp[0]).Integer()
+	to := in.Len()
+
+	if from > to {
+		from = to
+	}
+
+	vto := AsValue(comp[1]).Integer()
+	if vto >= from && vto <= in.Len() {
+		to = vto
+	}
+
+	return in.Slice(from, to), nil
+}
+
+func filterTitle(in *Value, param *Value) (*Value, *Error) {
+	if !in.IsString() {
+		return AsValue(""), nil
+	}
+	return AsValue(strings.Title(strings.ToLower(in.String()))), nil
+}
+
+func filterWordcount(in *Value, param *Value) (*Value, *Error) {
+	return AsValue(len(strings.Fields(in.String()))), nil
+}
+
+func filterWordwrap(in *Value, param *Value) (*Value, *Error) {
+	words := strings.Fields(in.String())
+	words_len := len(words)
+	wrap_at := param.Integer()
+	if wrap_at <= 0 {
+		return in, nil
+	}
+
+	linecount := words_len/wrap_at + words_len%wrap_at
+	lines := make([]string, 0, linecount)
+	for i := 0; i < linecount; i++ {
+		lines = append(lines, strings.Join(words[wrap_at*i:min(wrap_at*(i+1), words_len)], " "))
+	}
+	return AsValue(strings.Join(lines, "\n")), nil
+}
+
+func filterYesno(in *Value, param *Value) (*Value, *Error) {
+	choices := map[int]string{
+		0: "yes",
+		1: "no",
+		2: "maybe",
+	}
+	param_string := param.String()
+	custom_choices := strings.Split(param_string, ",")
+	if len(param_string) > 0 {
+		if len(custom_choices) > 3 {
+			return nil, &Error{
+				Sender:   "filter:yesno",
+				ErrorMsg: fmt.Sprintf("You cannot pass more than 3 options to the 'yesno'-filter (got: '%s').", param_string),
+			}
+		}
+		if len(custom_choices) < 2 {
+			return nil, &Error{
+				Sender:   "filter:yesno",
+				ErrorMsg: fmt.Sprintf("You must pass either no or at least 2 arguments to the 'yesno'-filter (got: '%s').", param_string),
+			}
+		}
+
+		// Map to the options now
+		choices[0] = custom_choices[0]
+		choices[1] = custom_choices[1]
+		if len(custom_choices) == 3 {
+			choices[2] = custom_choices[2]
+		}
+	}
+
+	// maybe
+	if in.IsNil() {
+		return AsValue(choices[2]), nil
+	}
+
+	// yes
+	if in.IsTrue() {
+		return AsValue(choices[0]), nil
+	}
+
+	// no
+	return AsValue(choices[1]), nil
+}

vendor/github.com/flosch/pongo2/helpers.go

@@ -0,0 +1,15 @@
+package pongo2
+
+func max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}

vendor/github.com/flosch/pongo2/lexer.go

@@ -0,0 +1,421 @@
+package pongo2
+
+import (
+	"fmt"
+	"strings"
+	"unicode/utf8"
+)
+
+const (
+	TokenError = iota
+	EOF
+
+	TokenHTML
+
+	TokenKeyword
+	TokenIdentifier
+	TokenString
+	TokenNumber
+	TokenSymbol
+)
+
+var (
+	tokenSpaceChars                = " \n\r\t"
+	tokenIdentifierChars           = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_"
+	tokenIdentifierCharsWithDigits = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_0123456789"
+	tokenDigits                    = "0123456789"
+
+	// Available symbols in pongo2 (within filters/tag)
+	TokenSymbols = []string{
+		// 3-Char symbols
+
+		// 2-Char symbols
+		"==", ">=", "<=", "&&", "||", "{{", "}}", "{%", "%}", "!=", "<>",
+
+		// 1-Char symbol
+		"(", ")", "+", "-", "*", "<", ">", "/", "^", ",", ".", "!", "|", ":", "=", "%",
+	}
+
+	// Available keywords in pongo2
+	TokenKeywords = []string{"in", "and", "or", "not", "true", "false", "as", "export"}
+)
+
+type TokenType int
+type Token struct {
+	Filename string
+	Typ      TokenType
+	Val      string
+	Line     int
+	Col      int
+}
+
+type lexerStateFn func() lexerStateFn
+type lexer struct {
+	name      string
+	input     string
+	start     int // start pos of the item
+	pos       int // current pos
+	width     int // width of last rune
+	tokens    []*Token
+	errored   bool
+	startline int
+	startcol  int
+	line      int
+	col       int
+
+	in_verbatim   bool
+	verbatim_name string
+}
+
+func (t *Token) String() string {
+	val := t.Val
+	if len(val) > 1000 {
+		val = fmt.Sprintf("%s...%s", val[:10], val[len(val)-5:len(val)])
+	}
+
+	typ := ""
+	switch t.Typ {
+	case TokenHTML:
+		typ = "HTML"
+	case TokenError:
+		typ = "Error"
+	case TokenIdentifier:
+		typ = "Identifier"
+	case TokenKeyword:
+		typ = "Keyword"
+	case TokenNumber:
+		typ = "Number"
+	case TokenString:
+		typ = "String"
+	case TokenSymbol:
+		typ = "Symbol"
+	default:
+		typ = "Unknown"
+	}
+
+	return fmt.Sprintf("<Token Typ=%s (%d) Val='%s' Line=%d Col=%d>",
+		typ, t.Typ, val, t.Line, t.Col)
+}
+
+func lex(name string, input string) ([]*Token, *Error) {
+	l := &lexer{
+		name:      name,
+		input:     input,
+		tokens:    make([]*Token, 0, 100),
+		line:      1,
+		col:       1,
+		startline: 1,
+		startcol:  1,
+	}
+	l.run()
+	if l.errored {
+		errtoken := l.tokens[len(l.tokens)-1]
+		return nil, &Error{
+			Filename: name,
+			Line:     errtoken.Line,
+			Column:   errtoken.Col,
+			Sender:   "lexer",
+			ErrorMsg: errtoken.Val,
+		}
+	}
+	return l.tokens, nil
+}
+
+func (l *lexer) value() string {
+	return l.input[l.start:l.pos]
+}
+
+func (l *lexer) length() int {
+	return l.pos - l.start
+}
+
+func (l *lexer) emit(t TokenType) {
+	tok := &Token{
+		Filename: l.name,
+		Typ:      t,
+		Val:      l.value(),
+		Line:     l.startline,
+		Col:      l.startcol,
+	}
+
+	if t == TokenString {
+		// Escape sequence \" in strings
+		tok.Val = strings.Replace(tok.Val, `\"`, `"`, -1)
+		tok.Val = strings.Replace(tok.Val, `\\`, `\`, -1)
+	}
+
+	l.tokens = append(l.tokens, tok)
+	l.start = l.pos
+	l.startline = l.line
+	l.startcol = l.col
+}
+
+func (l *lexer) next() rune {
+	if l.pos >= len(l.input) {
+		l.width = 0
+		return EOF
+	}
+	r, w := utf8.DecodeRuneInString(l.input[l.pos:])
+	l.width = w
+	l.pos += l.width
+	l.col += l.width
+	return r
+}
+
+func (l *lexer) backup() {
+	l.pos -= l.width
+	l.col -= l.width
+}
+
+func (l *lexer) peek() rune {
+	r := l.next()
+	l.backup()
+	return r
+}
+
+func (l *lexer) ignore() {
+	l.start = l.pos
+	l.startline = l.line
+	l.startcol = l.col
+}
+
+func (l *lexer) accept(what string) bool {
+	if strings.IndexRune(what, l.next()) >= 0 {
+		return true
+	}
+	l.backup()
+	return false
+}
+
+func (l *lexer) acceptRun(what string) {
+	for strings.IndexRune(what, l.next()) >= 0 {
+	}
+	l.backup()
+}
+
+func (l *lexer) errorf(format string, args ...interface{}) lexerStateFn {
+	t := &Token{
+		Filename: l.name,
+		Typ:      TokenError,
+		Val:      fmt.Sprintf(format, args...),
+		Line:     l.startline,
+		Col:      l.startcol,
+	}
+	l.tokens = append(l.tokens, t)
+	l.errored = true
+	l.startline = l.line
+	l.startcol = l.col
+	return nil
+}
+
+func (l *lexer) eof() bool {
+	return l.start >= len(l.input)-1
+}
+
+func (l *lexer) run() {
+	for {
+		// TODO: Support verbatim tag names
+		// https://docs.djangoproject.com/en/dev/ref/templates/builtins/#verbatim
+		if l.in_verbatim {
+			name := l.verbatim_name
+			if name != "" {
+				name += " "
+			}
+			if strings.HasPrefix(l.input[l.pos:], fmt.Sprintf("{%% endverbatim %s%%}", name)) { // end verbatim
+				if l.pos > l.start {
+					l.emit(TokenHTML)
+				}
+				w := len("{% endverbatim %}")
+				l.pos += w
+				l.col += w
+				l.ignore()
+				l.in_verbatim = false
+			}
+		} else if strings.HasPrefix(l.input[l.pos:], "{% verbatim %}") { // tag
+			if l.pos > l.start {
+				l.emit(TokenHTML)
+			}
+			l.in_verbatim = true
+			w := len("{% verbatim %}")
+			l.pos += w
+			l.col += w
+			l.ignore()
+		}
+
+		if !l.in_verbatim {
+			// Ignore single-line comments {# ... #}
+			if strings.HasPrefix(l.input[l.pos:], "{#") {
+				if l.pos > l.start {
+					l.emit(TokenHTML)
+				}
+
+				l.pos += 2 // pass '{#'
+				l.col += 2
+
+				for {
+					switch l.peek() {
+					case EOF:
+						l.errorf("Single-line comment not closed.")
+						return
+					case '\n':
+						l.errorf("Newline not permitted in a single-line comment.")
+						return
+					}
+
+					if strings.HasPrefix(l.input[l.pos:], "#}") {
+						l.pos += 2 // pass '#}'
+						l.col += 2
+						break
+					}
+
+					l.next()
+				}
+				l.ignore() // ignore whole comment
+
+				// Comment skipped
+				continue // next token
+			}
+
+			if strings.HasPrefix(l.input[l.pos:], "{{") || // variable
+				strings.HasPrefix(l.input[l.pos:], "{%") { // tag
+				if l.pos > l.start {
+					l.emit(TokenHTML)
+				}
+				l.tokenize()
+				if l.errored {
+					return
+				}
+				continue
+			}
+		}
+
+		switch l.peek() {
+		case '\n':
+			l.line++
+			l.col = 0
+		}
+		if l.next() == EOF {
+			break
+		}
+	}
+
+	if l.pos > l.start {
+		l.emit(TokenHTML)
+	}
+
+	if l.in_verbatim {
+		l.errorf("verbatim-tag not closed, got EOF.")
+	}
+}
+
+func (l *lexer) tokenize() {
+	for state := l.stateCode; state != nil; {
+		state = state()
+	}
+}
+
+func (l *lexer) stateCode() lexerStateFn {
+outer_loop:
+	for {
+		switch {
+		case l.accept(tokenSpaceChars):
+			if l.value() == "\n" {
+				return l.errorf("Newline not allowed within tag/variable.")
+			}
+			l.ignore()
+			continue
+		case l.accept(tokenIdentifierChars):
+			return l.stateIdentifier
+		case l.accept(tokenDigits):
+			return l.stateNumber
+		case l.accept(`"`):
+			return l.stateString
+		}
+
+		// Check for symbol
+		for _, sym := range TokenSymbols {
+			if strings.HasPrefix(l.input[l.start:], sym) {
+				l.pos += len(sym)
+				l.col += l.length()
+				l.emit(TokenSymbol)
+
+				if sym == "%}" || sym == "}}" {
+					// Tag/variable end, return after emit
+					return nil
+				}
+
+				continue outer_loop
+			}
+		}
+
+		if l.pos < len(l.input) {
+			return l.errorf("Unknown character: %q (%d)", l.peek(), l.peek())
+		}
+
+		break
+	}
+
+	// Normal shut down
+	return nil
+}
+
+func (l *lexer) stateIdentifier() lexerStateFn {
+	l.acceptRun(tokenIdentifierChars)
+	l.acceptRun(tokenIdentifierCharsWithDigits)
+	for _, kw := range TokenKeywords {
+		if kw == l.value() {
+			l.emit(TokenKeyword)
+			return l.stateCode
+		}
+	}
+	l.emit(TokenIdentifier)
+	return l.stateCode
+}
+
+func (l *lexer) stateNumber() lexerStateFn {
+	l.acceptRun(tokenDigits)
+	/*
+		Maybe context-sensitive number lexing?
+		* comments.0.Text // first comment
+		* usercomments.1.0 // second user, first comment
+		* if (score >= 8.5) // 8.5 as a number
+
+		if l.peek() == '.' {
+			l.accept(".")
+			if !l.accept(tokenDigits) {
+				return l.errorf("Malformed number.")
+			}
+			l.acceptRun(tokenDigits)
+		}
+	*/
+	l.emit(TokenNumber)
+	return l.stateCode
+}
+
+func (l *lexer) stateString() lexerStateFn {
+	l.ignore()
+	l.startcol -= 1 // we're starting the position at the first "
+	for !l.accept(`"`) {
+		switch l.next() {
+		case '\\':
+			// escape sequence
+			switch l.peek() {
+			case '"', '\\':
+				l.next()
+			default:
+				return l.errorf("Unknown escape sequence: \\%c", l.peek())
+			}
+		case EOF:
+			return l.errorf("Unexpected EOF, string not closed.")
+		case '\n':
+			return l.errorf("Newline in string is not allowed.")
+		}
+	}
+	l.backup()
+	l.emit(TokenString)
+
+	l.next()
+	l.ignore()
+
+	return l.stateCode
+}

vendor/github.com/flosch/pongo2/nodes.go

@@ -0,0 +1,20 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+// The root document
+type nodeDocument struct {
+	Nodes []INode
+}
+
+func (doc *nodeDocument) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	for _, n := range doc.Nodes {
+		err := n.Execute(ctx, buffer)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

vendor/github.com/flosch/pongo2/nodes_html.go

@@ -0,0 +1,14 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type nodeHTML struct {
+	token *Token
+}
+
+func (n *nodeHTML) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	buffer.WriteString(n.token.Val)
+	return nil
+}

vendor/github.com/flosch/pongo2/nodes_wrapper.go

@@ -0,0 +1,20 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type NodeWrapper struct {
+	Endtag string
+	nodes  []INode
+}
+
+func (wrapper *NodeWrapper) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	for _, n := range wrapper.nodes {
+		err := n.Execute(ctx, buffer)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

vendor/github.com/flosch/pongo2/parser.go

@@ -0,0 +1,267 @@
+package pongo2
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+)
+
+type INode interface {
+	Execute(*ExecutionContext, *bytes.Buffer) *Error
+}
+
+type IEvaluator interface {
+	INode
+	GetPositionToken() *Token
+	Evaluate(*ExecutionContext) (*Value, *Error)
+	FilterApplied(name string) bool
+}
+
+// The parser provides you a comprehensive and easy tool to
+// work with the template document and arguments provided by
+// the user for your custom tag.
+//
+// The parser works on a token list which will be provided by pongo2.
+// A token is a unit you can work with. Tokens are either of type identifier,
+// string, number, keyword, HTML or symbol.
+//
+// (See Token's documentation for more about tokens)
+type Parser struct {
+	name       string
+	idx        int
+	tokens     []*Token
+	last_token *Token
+
+	// if the parser parses a template document, here will be
+	// a reference to it (needed to access the template through Tags)
+	template *Template
+}
+
+// Creates a new parser to parse tokens.
+// Used inside pongo2 to parse documents and to provide an easy-to-use
+// parser for tag authors
+func newParser(name string, tokens []*Token, template *Template) *Parser {
+	p := &Parser{
+		name:     name,
+		tokens:   tokens,
+		template: template,
+	}
+	if len(tokens) > 0 {
+		p.last_token = tokens[len(tokens)-1]
+	}
+	return p
+}
+
+// Consume one token. It will be gone forever.
+func (p *Parser) Consume() {
+	p.ConsumeN(1)
+}
+
+// Consume N tokens. They will be gone forever.
+func (p *Parser) ConsumeN(count int) {
+	p.idx += count
+}
+
+// Returns the current token.
+func (p *Parser) Current() *Token {
+	return p.Get(p.idx)
+}
+
+// Returns the CURRENT token if the given type matches.
+// Consumes this token on success.
+func (p *Parser) MatchType(typ TokenType) *Token {
+	if t := p.PeekType(typ); t != nil {
+		p.Consume()
+		return t
+	}
+	return nil
+}
+
+// Returns the CURRENT token if the given type AND value matches.
+// Consumes this token on success.
+func (p *Parser) Match(typ TokenType, val string) *Token {
+	if t := p.Peek(typ, val); t != nil {
+		p.Consume()
+		return t
+	}
+	return nil
+}
+
+// Returns the CURRENT token if the given type AND *one* of
+// the given values matches.
+// Consumes this token on success.
+func (p *Parser) MatchOne(typ TokenType, vals ...string) *Token {
+	for _, val := range vals {
+		if t := p.Peek(typ, val); t != nil {
+			p.Consume()
+			return t
+		}
+	}
+	return nil
+}
+
+// Returns the CURRENT token if the given type matches.
+// It DOES NOT consume the token.
+func (p *Parser) PeekType(typ TokenType) *Token {
+	return p.PeekTypeN(0, typ)
+}
+
+// Returns the CURRENT token if the given type AND value matches.
+// It DOES NOT consume the token.
+func (p *Parser) Peek(typ TokenType, val string) *Token {
+	return p.PeekN(0, typ, val)
+}
+
+// Returns the CURRENT token if the given type AND *one* of
+// the given values matches.
+// It DOES NOT consume the token.
+func (p *Parser) PeekOne(typ TokenType, vals ...string) *Token {
+	for _, v := range vals {
+		t := p.PeekN(0, typ, v)
+		if t != nil {
+			return t
+		}
+	}
+	return nil
+}
+
+// Returns the tokens[current position + shift] token if the
+// given type AND value matches for that token.
+// DOES NOT consume the token.
+func (p *Parser) PeekN(shift int, typ TokenType, val string) *Token {
+	t := p.Get(p.idx + shift)
+	if t != nil {
+		if t.Typ == typ && t.Val == val {
+			return t
+		}
+	}
+	return nil
+}
+
+// Returns the tokens[current position + shift] token if the given type matches.
+// DOES NOT consume the token for that token.
+func (p *Parser) PeekTypeN(shift int, typ TokenType) *Token {
+	t := p.Get(p.idx + shift)
+	if t != nil {
+		if t.Typ == typ {
+			return t
+		}
+	}
+	return nil
+}
+
+// Returns the UNCONSUMED token count.
+func (p *Parser) Remaining() int {
+	return len(p.tokens) - p.idx
+}
+
+// Returns the total token count.
+func (p *Parser) Count() int {
+	return len(p.tokens)
+}
+
+// Returns tokens[i] or NIL (if i >= len(tokens))
+func (p *Parser) Get(i int) *Token {
+	if i < len(p.tokens) {
+		return p.tokens[i]
+	}
+	return nil
+}
+
+// Returns tokens[current-position + shift] or NIL
+// (if (current-position + i) >= len(tokens))
+func (p *Parser) GetR(shift int) *Token {
+	i := p.idx + shift
+	return p.Get(i)
+}
+
+// Produces a nice error message and returns an error-object.
+// The 'token'-argument is optional. If provided, it will take
+// the token's position information. If not provided, it will
+// automatically use the CURRENT token's position information.
+func (p *Parser) Error(msg string, token *Token) *Error {
+	if token == nil {
+		// Set current token
+		token = p.Current()
+		if token == nil {
+			// Set to last token
+			if len(p.tokens) > 0 {
+				token = p.tokens[len(p.tokens)-1]
+			}
+		}
+	}
+	var line, col int
+	if token != nil {
+		line = token.Line
+		col = token.Col
+	}
+	return &Error{
+		Template: p.template,
+		Filename: p.name,
+		Sender:   "parser",
+		Line:     line,
+		Column:   col,
+		Token:    token,
+		ErrorMsg: msg,
+	}
+}
+
+// Wraps all nodes between starting tag and "{% endtag %}" and provides
+// one simple interface to execute the wrapped nodes.
+// It returns a parser to process provided arguments to the tag.
+func (p *Parser) WrapUntilTag(names ...string) (*NodeWrapper, *Parser, *Error) {
+	wrapper := &NodeWrapper{}
+
+	tagArgs := make([]*Token, 0)
+
+	for p.Remaining() > 0 {
+		// New tag, check whether we have to stop wrapping here
+		if p.Peek(TokenSymbol, "{%") != nil {
+			tag_ident := p.PeekTypeN(1, TokenIdentifier)
+
+			if tag_ident != nil {
+				// We've found a (!) end-tag
+
+				found := false
+				for _, n := range names {
+					if tag_ident.Val == n {
+						found = true
+						break
+					}
+				}
+
+				// We only process the tag if we've found an end tag
+				if found {
+					// Okay, endtag found.
+					p.ConsumeN(2) // '{%' tagname
+
+					for {
+						if p.Match(TokenSymbol, "%}") != nil {
+							// Okay, end the wrapping here
+							wrapper.Endtag = tag_ident.Val
+							return wrapper, newParser(p.template.name, tagArgs, p.template), nil
+						} else {
+							t := p.Current()
+							p.Consume()
+							if t == nil {
+								return nil, nil, p.Error("Unexpected EOF.", p.last_token)
+							}
+							tagArgs = append(tagArgs, t)
+						}
+					}
+				}
+			}
+
+		}
+
+		// Otherwise process next element to be wrapped
+		node, err := p.parseDocElement()
+		if err != nil {
+			return nil, nil, err
+		}
+		wrapper.nodes = append(wrapper.nodes, node)
+	}
+
+	return nil, nil, p.Error(fmt.Sprintf("Unexpected EOF, expected tag %s.", strings.Join(names, " or ")),
+		p.last_token)
+}

vendor/github.com/flosch/pongo2/parser_document.go

@@ -0,0 +1,54 @@
+package pongo2
+
+// Doc = { ( Filter | Tag | HTML ) }
+func (p *Parser) parseDocElement() (INode, *Error) {
+	t := p.Current()
+
+	switch t.Typ {
+	case TokenHTML:
+		p.Consume() // consume HTML element
+		return &nodeHTML{token: t}, nil
+	case TokenSymbol:
+		switch t.Val {
+		case "{{":
+			// parse variable
+			variable, err := p.parseVariableElement()
+			if err != nil {
+				return nil, err
+			}
+			return variable, nil
+		case "{%":
+			// parse tag
+			tag, err := p.parseTagElement()
+			if err != nil {
+				return nil, err
+			}
+			return tag, nil
+		}
+	}
+	return nil, p.Error("Unexpected token (only HTML/tags/filters in templates allowed)", t)
+}
+
+func (tpl *Template) parse() *Error {
+	tpl.parser = newParser(tpl.name, tpl.tokens, tpl)
+	doc, err := tpl.parser.parseDocument()
+	if err != nil {
+		return err
+	}
+	tpl.root = doc
+	return nil
+}
+
+func (p *Parser) parseDocument() (*nodeDocument, *Error) {
+	doc := &nodeDocument{}
+
+	for p.Remaining() > 0 {
+		node, err := p.parseDocElement()
+		if err != nil {
+			return nil, err
+		}
+		doc.Nodes = append(doc.Nodes, node)
+	}
+
+	return doc, nil
+}

vendor/github.com/flosch/pongo2/parser_expression.go

@@ -0,0 +1,499 @@
+package pongo2
+
+import (
+	"bytes"
+	"fmt"
+	"math"
+)
+
+type Expression struct {
+	// TODO: Add location token?
+	expr1    IEvaluator
+	expr2    IEvaluator
+	op_token *Token
+}
+
+type relationalExpression struct {
+	// TODO: Add location token?
+	expr1    IEvaluator
+	expr2    IEvaluator
+	op_token *Token
+}
+
+type simpleExpression struct {
+	negate        bool
+	negative_sign bool
+	term1         IEvaluator
+	term2         IEvaluator
+	op_token      *Token
+}
+
+type term struct {
+	// TODO: Add location token?
+	factor1  IEvaluator
+	factor2  IEvaluator
+	op_token *Token
+}
+
+type power struct {
+	// TODO: Add location token?
+	power1 IEvaluator
+	power2 IEvaluator
+}
+
+func (expr *Expression) FilterApplied(name string) bool {
+	return expr.expr1.FilterApplied(name) && (expr.expr2 == nil ||
+		(expr.expr2 != nil && expr.expr2.FilterApplied(name)))
+}
+
+func (expr *relationalExpression) FilterApplied(name string) bool {
+	return expr.expr1.FilterApplied(name) && (expr.expr2 == nil ||
+		(expr.expr2 != nil && expr.expr2.FilterApplied(name)))
+}
+
+func (expr *simpleExpression) FilterApplied(name string) bool {
+	return expr.term1.FilterApplied(name) && (expr.term2 == nil ||
+		(expr.term2 != nil && expr.term2.FilterApplied(name)))
+}
+
+func (t *term) FilterApplied(name string) bool {
+	return t.factor1.FilterApplied(name) && (t.factor2 == nil ||
+		(t.factor2 != nil && t.factor2.FilterApplied(name)))
+}
+
+func (p *power) FilterApplied(name string) bool {
+	return p.power1.FilterApplied(name) && (p.power2 == nil ||
+		(p.power2 != nil && p.power2.FilterApplied(name)))
+}
+
+func (expr *Expression) GetPositionToken() *Token {
+	return expr.expr1.GetPositionToken()
+}
+
+func (expr *relationalExpression) GetPositionToken() *Token {
+	return expr.expr1.GetPositionToken()
+}
+
+func (expr *simpleExpression) GetPositionToken() *Token {
+	return expr.term1.GetPositionToken()
+}
+
+func (expr *term) GetPositionToken() *Token {
+	return expr.factor1.GetPositionToken()
+}
+
+func (expr *power) GetPositionToken() *Token {
+	return expr.power1.GetPositionToken()
+}
+
+func (expr *Expression) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	value, err := expr.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+	buffer.WriteString(value.String())
+	return nil
+}
+
+func (expr *relationalExpression) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	value, err := expr.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+	buffer.WriteString(value.String())
+	return nil
+}
+
+func (expr *simpleExpression) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	value, err := expr.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+	buffer.WriteString(value.String())
+	return nil
+}
+
+func (expr *term) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	value, err := expr.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+	buffer.WriteString(value.String())
+	return nil
+}
+
+func (expr *power) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	value, err := expr.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+	buffer.WriteString(value.String())
+	return nil
+}
+
+func (expr *Expression) Evaluate(ctx *ExecutionContext) (*Value, *Error) {
+	v1, err := expr.expr1.Evaluate(ctx)
+	if err != nil {
+		return nil, err
+	}
+	if expr.expr2 != nil {
+		v2, err := expr.expr2.Evaluate(ctx)
+		if err != nil {
+			return nil, err
+		}
+		switch expr.op_token.Val {
+		case "and", "&&":
+			return AsValue(v1.IsTrue() && v2.IsTrue()), nil
+		case "or", "||":
+			return AsValue(v1.IsTrue() || v2.IsTrue()), nil
+		default:
+			panic(fmt.Sprintf("unimplemented: %s", expr.op_token.Val))
+		}
+	} else {
+		return v1, nil
+	}
+}
+
+func (expr *relationalExpression) Evaluate(ctx *ExecutionContext) (*Value, *Error) {
+	v1, err := expr.expr1.Evaluate(ctx)
+	if err != nil {
+		return nil, err
+	}
+	if expr.expr2 != nil {
+		v2, err := expr.expr2.Evaluate(ctx)
+		if err != nil {
+			return nil, err
+		}
+		switch expr.op_token.Val {
+		case "<=":
+			if v1.IsFloat() || v2.IsFloat() {
+				return AsValue(v1.Float() <= v2.Float()), nil
+			} else {
+				return AsValue(v1.Integer() <= v2.Integer()), nil
+			}
+		case ">=":
+			if v1.IsFloat() || v2.IsFloat() {
+				return AsValue(v1.Float() >= v2.Float()), nil
+			} else {
+				return AsValue(v1.Integer() >= v2.Integer()), nil
+			}
+		case "==":
+			return AsValue(v1.EqualValueTo(v2)), nil
+		case ">":
+			if v1.IsFloat() || v2.IsFloat() {
+				return AsValue(v1.Float() > v2.Float()), nil
+			} else {
+				return AsValue(v1.Integer() > v2.Integer()), nil
+			}
+		case "<":
+			if v1.IsFloat() || v2.IsFloat() {
+				return AsValue(v1.Float() < v2.Float()), nil
+			} else {
+				return AsValue(v1.Integer() < v2.Integer()), nil
+			}
+		case "!=", "<>":
+			return AsValue(!v1.EqualValueTo(v2)), nil
+		case "in":
+			return AsValue(v2.Contains(v1)), nil
+		default:
+			panic(fmt.Sprintf("unimplemented: %s", expr.op_token.Val))
+		}
+	} else {
+		return v1, nil
+	}
+}
+
+func (expr *simpleExpression) Evaluate(ctx *ExecutionContext) (*Value, *Error) {
+	t1, err := expr.term1.Evaluate(ctx)
+	if err != nil {
+		return nil, err
+	}
+	result := t1
+
+	if expr.negate {
+		result = result.Negate()
+	}
+
+	if expr.negative_sign {
+		if result.IsNumber() {
+			switch {
+			case result.IsFloat():
+				result = AsValue(-1 * result.Float())
+			case result.IsInteger():
+				result = AsValue(-1 * result.Integer())
+			default:
+				panic("not possible")
+			}
+		} else {
+			return nil, ctx.Error("Negative sign on a non-number expression", expr.GetPositionToken())
+		}
+	}
+
+	if expr.term2 != nil {
+		t2, err := expr.term2.Evaluate(ctx)
+		if err != nil {
+			return nil, err
+		}
+		switch expr.op_token.Val {
+		case "+":
+			if result.IsFloat() || t2.IsFloat() {
+				// Result will be a float
+				return AsValue(result.Float() + t2.Float()), nil
+			} else {
+				// Result will be an integer
+				return AsValue(result.Integer() + t2.Integer()), nil
+			}
+		case "-":
+			if result.IsFloat() || t2.IsFloat() {
+				// Result will be a float
+				return AsValue(result.Float() - t2.Float()), nil
+			} else {
+				// Result will be an integer
+				return AsValue(result.Integer() - t2.Integer()), nil
+			}
+		default:
+			panic("unimplemented")
+		}
+	}
+
+	return result, nil
+}
+
+func (t *term) Evaluate(ctx *ExecutionContext) (*Value, *Error) {
+	f1, err := t.factor1.Evaluate(ctx)
+	if err != nil {
+		return nil, err
+	}
+	if t.factor2 != nil {
+		f2, err := t.factor2.Evaluate(ctx)
+		if err != nil {
+			return nil, err
+		}
+		switch t.op_token.Val {
+		case "*":
+			if f1.IsFloat() || f2.IsFloat() {
+				// Result will be float
+				return AsValue(f1.Float() * f2.Float()), nil
+			}
+			// Result will be int
+			return AsValue(f1.Integer() * f2.Integer()), nil
+		case "/":
+			if f1.IsFloat() || f2.IsFloat() {
+				// Result will be float
+				return AsValue(f1.Float() / f2.Float()), nil
+			}
+			// Result will be int
+			return AsValue(f1.Integer() / f2.Integer()), nil
+		case "%":
+			// Result will be int
+			return AsValue(f1.Integer() % f2.Integer()), nil
+		default:
+			panic("unimplemented")
+		}
+	} else {
+		return f1, nil
+	}
+}
+
+func (pw *power) Evaluate(ctx *ExecutionContext) (*Value, *Error) {
+	p1, err := pw.power1.Evaluate(ctx)
+	if err != nil {
+		return nil, err
+	}
+	if pw.power2 != nil {
+		p2, err := pw.power2.Evaluate(ctx)
+		if err != nil {
+			return nil, err
+		}
+		return AsValue(math.Pow(p1.Float(), p2.Float())), nil
+	} else {
+		return p1, nil
+	}
+}
+
+func (p *Parser) parseFactor() (IEvaluator, *Error) {
+	if p.Match(TokenSymbol, "(") != nil {
+		expr, err := p.ParseExpression()
+		if err != nil {
+			return nil, err
+		}
+		if p.Match(TokenSymbol, ")") == nil {
+			return nil, p.Error("Closing bracket expected after expression", nil)
+		}
+		return expr, nil
+	}
+
+	return p.parseVariableOrLiteralWithFilter()
+}
+
+func (p *Parser) parsePower() (IEvaluator, *Error) {
+	pw := new(power)
+
+	power1, err := p.parseFactor()
+	if err != nil {
+		return nil, err
+	}
+	pw.power1 = power1
+
+	if p.Match(TokenSymbol, "^") != nil {
+		power2, err := p.parsePower()
+		if err != nil {
+			return nil, err
+		}
+		pw.power2 = power2
+	}
+
+	if pw.power2 == nil {
+		// Shortcut for faster evaluation
+		return pw.power1, nil
+	}
+
+	return pw, nil
+}
+
+func (p *Parser) parseTerm() (IEvaluator, *Error) {
+	return_term := new(term)
+
+	factor1, err := p.parsePower()
+	if err != nil {
+		return nil, err
+	}
+	return_term.factor1 = factor1
+
+	for p.PeekOne(TokenSymbol, "*", "/", "%") != nil {
+		if return_term.op_token != nil {
+			// Create new sub-term
+			return_term = &term{
+				factor1: return_term,
+			}
+		}
+
+		op := p.Current()
+		p.Consume()
+
+		factor2, err := p.parsePower()
+		if err != nil {
+			return nil, err
+		}
+
+		return_term.op_token = op
+		return_term.factor2 = factor2
+	}
+
+	if return_term.op_token == nil {
+		// Shortcut for faster evaluation
+		return return_term.factor1, nil
+	}
+
+	return return_term, nil
+}
+
+func (p *Parser) parseSimpleExpression() (IEvaluator, *Error) {
+	expr := new(simpleExpression)
+
+	if sign := p.MatchOne(TokenSymbol, "+", "-"); sign != nil {
+		if sign.Val == "-" {
+			expr.negative_sign = true
+		}
+	}
+
+	if p.Match(TokenSymbol, "!") != nil || p.Match(TokenKeyword, "not") != nil {
+		expr.negate = true
+	}
+
+	term1, err := p.parseTerm()
+	if err != nil {
+		return nil, err
+	}
+	expr.term1 = term1
+
+	for p.PeekOne(TokenSymbol, "+", "-") != nil {
+		if expr.op_token != nil {
+			// New sub expr
+			expr = &simpleExpression{
+				term1: expr,
+			}
+		}
+
+		op := p.Current()
+		p.Consume()
+
+		term2, err := p.parseTerm()
+		if err != nil {
+			return nil, err
+		}
+
+		expr.term2 = term2
+		expr.op_token = op
+	}
+
+	if expr.negate == false && expr.negative_sign == false && expr.term2 == nil {
+		// Shortcut for faster evaluation
+		return expr.term1, nil
+	}
+
+	return expr, nil
+}
+
+func (p *Parser) parseRelationalExpression() (IEvaluator, *Error) {
+	expr1, err := p.parseSimpleExpression()
+	if err != nil {
+		return nil, err
+	}
+
+	expr := &relationalExpression{
+		expr1: expr1,
+	}
+
+	if t := p.MatchOne(TokenSymbol, "==", "<=", ">=", "!=", "<>", ">", "<"); t != nil {
+		expr2, err := p.parseRelationalExpression()
+		if err != nil {
+			return nil, err
+		}
+		expr.op_token = t
+		expr.expr2 = expr2
+	} else if t := p.MatchOne(TokenKeyword, "in"); t != nil {
+		expr2, err := p.parseSimpleExpression()
+		if err != nil {
+			return nil, err
+		}
+		expr.op_token = t
+		expr.expr2 = expr2
+	}
+
+	if expr.expr2 == nil {
+		// Shortcut for faster evaluation
+		return expr.expr1, nil
+	}
+
+	return expr, nil
+}
+
+func (p *Parser) ParseExpression() (IEvaluator, *Error) {
+	rexpr1, err := p.parseRelationalExpression()
+	if err != nil {
+		return nil, err
+	}
+
+	exp := &Expression{
+		expr1: rexpr1,
+	}
+
+	if p.PeekOne(TokenSymbol, "&&", "||") != nil || p.PeekOne(TokenKeyword, "and", "or") != nil {
+		op := p.Current()
+		p.Consume()
+		expr2, err := p.ParseExpression()
+		if err != nil {
+			return nil, err
+		}
+		exp.expr2 = expr2
+		exp.op_token = op
+	}
+
+	if exp.expr2 == nil {
+		// Shortcut for faster evaluation
+		return exp.expr1, nil
+	}
+
+	return exp, nil
+}

vendor/github.com/flosch/pongo2/pongo2.go

@@ -0,0 +1,14 @@
+package pongo2
+
+// Version string
+const Version = "v3"
+
+// Helper function which panics, if a Template couldn't
+// successfully parsed. This is how you would use it:
+//     var baseTemplate = pongo2.Must(pongo2.FromFile("templates/base.html"))
+func Must(tpl *Template, err error) *Template {
+	if err != nil {
+		panic(err)
+	}
+	return tpl
+}

vendor/github.com/flosch/pongo2/pongo2_issues_test.go

@@ -0,0 +1,20 @@
+package pongo2
+
+import (
+	"testing"
+
+	. "gopkg.in/check.v1"
+)
+
+// Hook up gocheck into the "go test" runner.
+
+func TestIssues(t *testing.T) { TestingT(t) }
+
+type IssueTestSuite struct{}
+
+var _ = Suite(&IssueTestSuite{})
+
+func (s *TestSuite) TestIssues(c *C) {
+	// Add a test for any issue
+	c.Check(42, Equals, 42)
+}

vendor/github.com/flosch/pongo2/pongo2_template_test.go

@@ -0,0 +1,539 @@
+package pongo2
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"testing"
+	"time"
+)
+
+var admin_list = []string{"user2"}
+
+var time1 = time.Date(2014, 06, 10, 15, 30, 15, 0, time.UTC)
+var time2 = time.Date(2011, 03, 21, 8, 37, 56, 12, time.UTC)
+
+type post struct {
+	Text    string
+	Created time.Time
+}
+
+type user struct {
+	Name      string
+	Validated bool
+}
+
+type comment struct {
+	Author *user
+	Date   time.Time
+	Text   string
+}
+
+func is_admin(u *user) bool {
+	for _, a := range admin_list {
+		if a == u.Name {
+			return true
+		}
+	}
+	return false
+}
+
+func (u *user) Is_admin() *Value {
+	return AsValue(is_admin(u))
+}
+
+func (u *user) Is_admin2() bool {
+	return is_admin(u)
+}
+
+func (p *post) String() string {
+	return ":-)"
+}
+
+/*
+ * Start setup sandbox
+ */
+
+type tagSandboxDemoTag struct {
+}
+
+func (node *tagSandboxDemoTag) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	buffer.WriteString("hello")
+	return nil
+}
+
+func tagSandboxDemoTagParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	return &tagSandboxDemoTag{}, nil
+}
+
+func BannedFilterFn(in *Value, params *Value) (*Value, *Error) {
+	return in, nil
+}
+
+func init() {
+	DefaultSet.Debug = true
+
+	RegisterFilter("banned_filter", BannedFilterFn)
+	RegisterFilter("unbanned_filter", BannedFilterFn)
+	RegisterTag("banned_tag", tagSandboxDemoTagParser)
+	RegisterTag("unbanned_tag", tagSandboxDemoTagParser)
+
+	DefaultSet.BanFilter("banned_filter")
+	DefaultSet.BanTag("banned_tag")
+
+	// Allow different kind of levels inside template_tests/
+	abs_path, err := filepath.Abs("./template_tests/*")
+	if err != nil {
+		panic(err)
+	}
+	DefaultSet.SandboxDirectories = append(DefaultSet.SandboxDirectories, abs_path)
+
+	abs_path, err = filepath.Abs("./template_tests/*/*")
+	if err != nil {
+		panic(err)
+	}
+	DefaultSet.SandboxDirectories = append(DefaultSet.SandboxDirectories, abs_path)
+
+	abs_path, err = filepath.Abs("./template_tests/*/*/*")
+	if err != nil {
+		panic(err)
+	}
+	DefaultSet.SandboxDirectories = append(DefaultSet.SandboxDirectories, abs_path)
+
+	// Allow pongo2 temp files
+	DefaultSet.SandboxDirectories = append(DefaultSet.SandboxDirectories, "/tmp/pongo2_*")
+
+	f, err := ioutil.TempFile("/tmp/", "pongo2_")
+	if err != nil {
+		panic("cannot write to /tmp/")
+	}
+	f.Write([]byte("Hello from pongo2"))
+	DefaultSet.Globals["temp_file"] = f.Name()
+}
+
+/*
+ * End setup sandbox
+ */
+
+var tplContext = Context{
+	"number": 11,
+	"simple": map[string]interface{}{
+		"number":        42,
+		"name":          "john doe",
+		"included_file": "INCLUDES.helper",
+		"nil":           nil,
+		"uint":          uint(8),
+		"float":         float64(3.1415),
+		"str":           "string",
+		"chinese_hello_world": "你好世界",
+		"bool_true":           true,
+		"bool_false":          false,
+		"newline_text": `this is a text
+with a new line in it`,
+		"long_text": `This is a simple text.
+
+This too, as a paragraph.
+Right?
+
+Yep!`,
+		"escape_js_test":     `escape sequences \r\n\'\" special chars "?!=$<>`,
+		"one_item_list":      []int{99},
+		"multiple_item_list": []int{1, 1, 2, 3, 5, 8, 13, 21, 34, 55},
+		"misc_list":          []interface{}{"Hello", 99, 3.14, "good"},
+		"escape_text":        "This is \\a Test. \"Yep\". 'Yep'.",
+		"xss":                "<script>alert(\"uh oh\");</script>",
+		"intmap": map[int]string{
+			1: "one",
+			2: "two",
+			5: "five",
+		},
+		"func_add": func(a, b int) int {
+			return a + b
+		},
+		"func_add_iface": func(a, b interface{}) interface{} {
+			return a.(int) + b.(int)
+		},
+		"func_variadic": func(msg string, args ...interface{}) string {
+			return fmt.Sprintf(msg, args...)
+		},
+		"func_variadic_sum_int": func(args ...int) int {
+			// Create a sum
+			s := 0
+			for _, i := range args {
+				s += i
+			}
+			return s
+		},
+		"func_variadic_sum_int2": func(args ...*Value) *Value {
+			// Create a sum
+			s := 0
+			for _, i := range args {
+				s += i.Integer()
+			}
+			return AsValue(s)
+		},
+	},
+	"complex": map[string]interface{}{
+		"is_admin": is_admin,
+		"post": post{
+			Text:    "<h2>Hello!</h2><p>Welcome to my new blog page. I'm using pongo2 which supports {{ variables }} and {% tags %}.</p>",
+			Created: time2,
+		},
+		"comments": []*comment{
+			&comment{
+				Author: &user{
+					Name:      "user1",
+					Validated: true,
+				},
+				Date: time1,
+				Text: "\"pongo2 is nice!\"",
+			},
+			&comment{
+				Author: &user{
+					Name:      "user2",
+					Validated: true,
+				},
+				Date: time2,
+				Text: "comment2 with <script>unsafe</script> tags in it",
+			},
+			&comment{
+				Author: &user{
+					Name:      "user3",
+					Validated: false,
+				},
+				Date: time1,
+				Text: "<b>hello!</b> there",
+			},
+		},
+		"comments2": []*comment{
+			&comment{
+				Author: &user{
+					Name:      "user1",
+					Validated: true,
+				},
+				Date: time2,
+				Text: "\"pongo2 is nice!\"",
+			},
+			&comment{
+				Author: &user{
+					Name:      "user1",
+					Validated: true,
+				},
+				Date: time1,
+				Text: "comment2 with <script>unsafe</script> tags in it",
+			},
+			&comment{
+				Author: &user{
+					Name:      "user3",
+					Validated: false,
+				},
+				Date: time1,
+				Text: "<b>hello!</b> there",
+			},
+		},
+	},
+}
+
+func TestTemplates(t *testing.T) {
+	debug = true
+
+	// Add a global to the default set
+	Globals["this_is_a_global_variable"] = "this is a global text"
+
+	matches, err := filepath.Glob("./template_tests/*.tpl")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for idx, match := range matches {
+		t.Logf("[Template %3d] Testing '%s'", idx+1, match)
+		tpl, err := FromFile(match)
+		if err != nil {
+			t.Fatalf("Error on FromFile('%s'): %s", match, err.Error())
+		}
+		test_filename := fmt.Sprintf("%s.out", match)
+		test_out, rerr := ioutil.ReadFile(test_filename)
+		if rerr != nil {
+			t.Fatalf("Error on ReadFile('%s'): %s", test_filename, rerr.Error())
+		}
+		tpl_out, err := tpl.ExecuteBytes(tplContext)
+		if err != nil {
+			t.Fatalf("Error on Execute('%s'): %s", match, err.Error())
+		}
+		if bytes.Compare(test_out, tpl_out) != 0 {
+			t.Logf("Template (rendered) '%s': '%s'", match, tpl_out)
+			err_filename := filepath.Base(fmt.Sprintf("%s.error", match))
+			err := ioutil.WriteFile(err_filename, []byte(tpl_out), 0600)
+			if err != nil {
+				t.Fatalf(err.Error())
+			}
+			t.Logf("get a complete diff with command: 'diff -ya %s %s'", test_filename, err_filename)
+			t.Errorf("Failed: test_out != tpl_out for %s", match)
+		}
+	}
+}
+
+func TestExecutionErrors(t *testing.T) {
+	debug = true
+
+	matches, err := filepath.Glob("./template_tests/*-execution.err")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for idx, match := range matches {
+		t.Logf("[Errors %3d] Testing '%s'", idx+1, match)
+
+		test_data, err := ioutil.ReadFile(match)
+		tests := strings.Split(string(test_data), "\n")
+
+		check_filename := fmt.Sprintf("%s.out", match)
+		check_data, err := ioutil.ReadFile(check_filename)
+		if err != nil {
+			t.Fatalf("Error on ReadFile('%s'): %s", check_filename, err.Error())
+		}
+		checks := strings.Split(string(check_data), "\n")
+
+		if len(checks) != len(tests) {
+			t.Fatal("Template lines != Checks lines")
+		}
+
+		for idx, test := range tests {
+			if strings.TrimSpace(test) == "" {
+				continue
+			}
+			if strings.TrimSpace(checks[idx]) == "" {
+				t.Fatalf("[%s Line %d] Check is empty (must contain an regular expression).",
+					match, idx+1)
+			}
+
+			tpl, err := FromString(test)
+			if err != nil {
+				t.Fatalf("Error on FromString('%s'): %s", test, err.Error())
+			}
+
+			_, err = tpl.ExecuteBytes(tplContext)
+			if err == nil {
+				t.Fatalf("[%s Line %d] Expected error for (got none): %s",
+					match, idx+1, tests[idx])
+			}
+
+			re := regexp.MustCompile(fmt.Sprintf("^%s$", checks[idx]))
+			if !re.MatchString(err.Error()) {
+				t.Fatalf("[%s Line %d] Error for '%s' (err = '%s') does not match the (regexp-)check: %s",
+					match, idx+1, test, err.Error(), checks[idx])
+			}
+		}
+	}
+}
+
+func TestCompilationErrors(t *testing.T) {
+	debug = true
+
+	matches, err := filepath.Glob("./template_tests/*-compilation.err")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for idx, match := range matches {
+		t.Logf("[Errors %3d] Testing '%s'", idx+1, match)
+
+		test_data, err := ioutil.ReadFile(match)
+		tests := strings.Split(string(test_data), "\n")
+
+		check_filename := fmt.Sprintf("%s.out", match)
+		check_data, err := ioutil.ReadFile(check_filename)
+		if err != nil {
+			t.Fatalf("Error on ReadFile('%s'): %s", check_filename, err.Error())
+		}
+		checks := strings.Split(string(check_data), "\n")
+
+		if len(checks) != len(tests) {
+			t.Fatal("Template lines != Checks lines")
+		}
+
+		for idx, test := range tests {
+			if strings.TrimSpace(test) == "" {
+				continue
+			}
+			if strings.TrimSpace(checks[idx]) == "" {
+				t.Fatalf("[%s Line %d] Check is empty (must contain an regular expression).",
+					match, idx+1)
+			}
+
+			_, err = FromString(test)
+			if err == nil {
+				t.Fatalf("[%s | Line %d] Expected error for (got none): %s", match, idx+1, tests[idx])
+			}
+			re := regexp.MustCompile(fmt.Sprintf("^%s$", checks[idx]))
+			if !re.MatchString(err.Error()) {
+				t.Fatalf("[%s | Line %d] Error for '%s' (err = '%s') does not match the (regexp-)check: %s",
+					match, idx+1, test, err.Error(), checks[idx])
+			}
+		}
+	}
+}
+
+func TestBaseDirectory(t *testing.T) {
+	mustStr := "Hello from template_tests/base_dir_test/"
+
+	s := NewSet("test set with base directory")
+	s.Globals["base_directory"] = "template_tests/base_dir_test/"
+	if err := s.SetBaseDirectory(s.Globals["base_directory"].(string)); err != nil {
+		t.Fatal(err)
+	}
+
+	matches, err := filepath.Glob("./template_tests/base_dir_test/subdir/*")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, match := range matches {
+		match = strings.Replace(match, "template_tests/base_dir_test/", "", -1)
+
+		tpl, err := s.FromFile(match)
+		if err != nil {
+			t.Fatal(err)
+		}
+		out, err := tpl.Execute(nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if out != mustStr {
+			t.Errorf("%s: out ('%s') != mustStr ('%s')", match, out, mustStr)
+		}
+	}
+}
+
+func BenchmarkCache(b *testing.B) {
+	cache_set := NewSet("cache set")
+	for i := 0; i < b.N; i++ {
+		tpl, err := cache_set.FromCache("template_tests/complex.tpl")
+		if err != nil {
+			b.Fatal(err)
+		}
+		_, err = tpl.ExecuteBytes(tplContext)
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkCacheDebugOn(b *testing.B) {
+	cache_debug_set := NewSet("cache set")
+	cache_debug_set.Debug = true
+	for i := 0; i < b.N; i++ {
+		tpl, err := cache_debug_set.FromFile("template_tests/complex.tpl")
+		if err != nil {
+			b.Fatal(err)
+		}
+		_, err = tpl.ExecuteBytes(tplContext)
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkExecuteComplexWithSandboxActive(b *testing.B) {
+	tpl, err := FromFile("template_tests/complex.tpl")
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_, err = tpl.ExecuteBytes(tplContext)
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkCompileAndExecuteComplexWithSandboxActive(b *testing.B) {
+	buf, err := ioutil.ReadFile("template_tests/complex.tpl")
+	if err != nil {
+		b.Fatal(err)
+	}
+	preloadedTpl := string(buf)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		tpl, err := FromString(preloadedTpl)
+		if err != nil {
+			b.Fatal(err)
+		}
+
+		_, err = tpl.ExecuteBytes(tplContext)
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkParallelExecuteComplexWithSandboxActive(b *testing.B) {
+	tpl, err := FromFile("template_tests/complex.tpl")
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.ResetTimer()
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			_, err := tpl.ExecuteBytes(tplContext)
+			if err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}
+
+func BenchmarkExecuteComplexWithoutSandbox(b *testing.B) {
+	s := NewSet("set without sandbox")
+	tpl, err := s.FromFile("template_tests/complex.tpl")
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_, err = tpl.ExecuteBytes(tplContext)
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkCompileAndExecuteComplexWithoutSandbox(b *testing.B) {
+	buf, err := ioutil.ReadFile("template_tests/complex.tpl")
+	if err != nil {
+		b.Fatal(err)
+	}
+	preloadedTpl := string(buf)
+
+	s := NewSet("set without sandbox")
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		tpl, err := s.FromString(preloadedTpl)
+		if err != nil {
+			b.Fatal(err)
+		}
+
+		_, err = tpl.ExecuteBytes(tplContext)
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkParallelExecuteComplexWithoutSandbox(b *testing.B) {
+	s := NewSet("set without sandbox")
+	tpl, err := s.FromFile("template_tests/complex.tpl")
+	if err != nil {
+		b.Fatal(err)
+	}
+	b.ResetTimer()
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			_, err := tpl.ExecuteBytes(tplContext)
+			if err != nil {
+				b.Fatal(err)
+			}
+		}
+	})
+}

vendor/github.com/flosch/pongo2/pongo2_test.go

@@ -0,0 +1,66 @@
+package pongo2
+
+import (
+	"testing"
+
+	. "gopkg.in/check.v1"
+)
+
+// Hook up gocheck into the "go test" runner.
+
+func Test(t *testing.T) { TestingT(t) }
+
+type TestSuite struct {
+	tpl *Template
+}
+
+var (
+	_           = Suite(&TestSuite{})
+	test_suite2 = NewSet("test suite 2")
+)
+
+func parseTemplate(s string, c Context) string {
+	t, err := test_suite2.FromString(s)
+	if err != nil {
+		panic(err)
+	}
+	out, err := t.Execute(c)
+	if err != nil {
+		panic(err)
+	}
+	return out
+}
+
+func parseTemplateFn(s string, c Context) func() {
+	return func() {
+		parseTemplate(s, c)
+	}
+}
+
+func (s *TestSuite) TestMisc(c *C) {
+	// Must
+	// TODO: Add better error message (see issue #18)
+	c.Check(func() { Must(test_suite2.FromFile("template_tests/inheritance/base2.tpl")) },
+		PanicMatches,
+		`\[Error \(where: fromfile\) in template_tests/inheritance/doesnotexist.tpl | Line 1 Col 12 near 'doesnotexist.tpl'\] open template_tests/inheritance/doesnotexist.tpl: no such file or directory`)
+
+	// Context
+	c.Check(parseTemplateFn("", Context{"'illegal": nil}), PanicMatches, ".*not a valid identifier.*")
+
+	// Registers
+	c.Check(func() { RegisterFilter("escape", nil) }, PanicMatches, ".*is already registered.*")
+	c.Check(func() { RegisterTag("for", nil) }, PanicMatches, ".*is already registered.*")
+
+	// ApplyFilter
+	v, err := ApplyFilter("title", AsValue("this is a title"), nil)
+	if err != nil {
+		c.Fatal(err)
+	}
+	c.Check(v.String(), Equals, "This Is A Title")
+	c.Check(func() {
+		_, err := ApplyFilter("doesnotexist", nil, nil)
+		if err != nil {
+			panic(err)
+		}
+	}, PanicMatches, `\[Error \(where: applyfilter\)\] Filter with name 'doesnotexist' not found.`)
+}

vendor/github.com/flosch/pongo2/tags.go

@@ -0,0 +1,132 @@
+package pongo2
+
+/* Incomplete:
+   -----------
+
+   verbatim (only the "name" argument is missing for verbatim)
+
+   Reconsideration:
+   ----------------
+
+   debug (reason: not sure what to output yet)
+   regroup / Grouping on other properties (reason: maybe too python-specific; not sure how useful this would be in Go)
+
+   Following built-in tags wont be added:
+   --------------------------------------
+
+   csrf_token (reason: web-framework specific)
+   load (reason: python-specific)
+   url (reason: web-framework specific)
+*/
+
+import (
+	"fmt"
+)
+
+type INodeTag interface {
+	INode
+}
+
+// This is the function signature of the tag's parser you will have
+// to implement in order to create a new tag.
+//
+// 'doc' is providing access to the whole document while 'arguments'
+// is providing access to the user's arguments to the tag:
+//
+//     {% your_tag_name some "arguments" 123 %}
+//
+// start_token will be the *Token with the tag's name in it (here: your_tag_name).
+//
+// Please see the Parser documentation on how to use the parser.
+// See RegisterTag()'s documentation for more information about
+// writing a tag as well.
+type TagParser func(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error)
+
+type tag struct {
+	name   string
+	parser TagParser
+}
+
+var tags map[string]*tag
+
+func init() {
+	tags = make(map[string]*tag)
+}
+
+// Registers a new tag. If there's already a tag with the same
+// name, RegisterTag will panic. You usually want to call this
+// function in the tag's init() function:
+// http://golang.org/doc/effective_go.html#init
+//
+// See http://www.florian-schlachter.de/post/pongo2/ for more about
+// writing filters and tags.
+func RegisterTag(name string, parserFn TagParser) {
+	_, existing := tags[name]
+	if existing {
+		panic(fmt.Sprintf("Tag with name '%s' is already registered.", name))
+	}
+	tags[name] = &tag{
+		name:   name,
+		parser: parserFn,
+	}
+}
+
+// Replaces an already registered tag with a new implementation. Use this
+// function with caution since it allows you to change existing tag behaviour.
+func ReplaceTag(name string, parserFn TagParser) {
+	_, existing := tags[name]
+	if !existing {
+		panic(fmt.Sprintf("Tag with name '%s' does not exist (therefore cannot be overridden).", name))
+	}
+	tags[name] = &tag{
+		name:   name,
+		parser: parserFn,
+	}
+}
+
+// Tag = "{%" IDENT ARGS "%}"
+func (p *Parser) parseTagElement() (INodeTag, *Error) {
+	p.Consume() // consume "{%"
+	token_name := p.MatchType(TokenIdentifier)
+
+	// Check for identifier
+	if token_name == nil {
+		return nil, p.Error("Tag name must be an identifier.", nil)
+	}
+
+	// Check for the existing tag
+	tag, exists := tags[token_name.Val]
+	if !exists {
+		// Does not exists
+		return nil, p.Error(fmt.Sprintf("Tag '%s' not found (or beginning tag not provided)", token_name.Val), token_name)
+	}
+
+	// Check sandbox tag restriction
+	if _, is_banned := p.template.set.bannedTags[token_name.Val]; is_banned {
+		return nil, p.Error(fmt.Sprintf("Usage of tag '%s' is not allowed (sandbox restriction active).", token_name.Val), token_name)
+	}
+
+	args_token := make([]*Token, 0)
+	for p.Peek(TokenSymbol, "%}") == nil && p.Remaining() > 0 {
+		// Add token to args
+		args_token = append(args_token, p.Current())
+		p.Consume() // next token
+	}
+
+	// EOF?
+	if p.Remaining() == 0 {
+		return nil, p.Error("Unexpectedly reached EOF, no tag end found.", p.last_token)
+	}
+
+	p.Match(TokenSymbol, "%}")
+
+	arg_parser := newParser(p.name, args_token, p.template)
+	if len(args_token) == 0 {
+		// This is done to have nice EOF error messages
+		arg_parser.last_token = token_name
+	}
+
+	p.template.level++
+	defer func() { p.template.level-- }()
+	return tag.parser(p, token_name, arg_parser)
+}

vendor/github.com/flosch/pongo2/tags_autoescape.go

@@ -0,0 +1,56 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagAutoescapeNode struct {
+	wrapper    *NodeWrapper
+	autoescape bool
+}
+
+func (node *tagAutoescapeNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	old := ctx.Autoescape
+	ctx.Autoescape = node.autoescape
+
+	err := node.wrapper.Execute(ctx, buffer)
+	if err != nil {
+		return err
+	}
+
+	ctx.Autoescape = old
+
+	return nil
+}
+
+func tagAutoescapeParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	autoescape_node := &tagAutoescapeNode{}
+
+	wrapper, _, err := doc.WrapUntilTag("endautoescape")
+	if err != nil {
+		return nil, err
+	}
+	autoescape_node.wrapper = wrapper
+
+	mode_token := arguments.MatchType(TokenIdentifier)
+	if mode_token == nil {
+		return nil, arguments.Error("A mode is required for autoescape-tag.", nil)
+	}
+	if mode_token.Val == "on" {
+		autoescape_node.autoescape = true
+	} else if mode_token.Val == "off" {
+		autoescape_node.autoescape = false
+	} else {
+		return nil, arguments.Error("Only 'on' or 'off' is valid as an autoescape-mode.", nil)
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed autoescape-tag arguments.", nil)
+	}
+
+	return autoescape_node, nil
+}
+
+func init() {
+	RegisterTag("autoescape", tagAutoescapeParser)
+}

vendor/github.com/flosch/pongo2/tags_block.go

@@ -0,0 +1,94 @@
+package pongo2
+
+import (
+	"bytes"
+	"fmt"
+)
+
+type tagBlockNode struct {
+	name string
+}
+
+func (node *tagBlockNode) getBlockWrapperByName(tpl *Template) *NodeWrapper {
+	var t *NodeWrapper
+	if tpl.child != nil {
+		// First ask the child for the block
+		t = node.getBlockWrapperByName(tpl.child)
+	}
+	if t == nil {
+		// Child has no block, lets look up here at parent
+		t = tpl.blocks[node.name]
+	}
+	return t
+}
+
+func (node *tagBlockNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	tpl := ctx.template
+	if tpl == nil {
+		panic("internal error: tpl == nil")
+	}
+	// Determine the block to execute
+	block_wrapper := node.getBlockWrapperByName(tpl)
+	if block_wrapper == nil {
+		// fmt.Printf("could not find: %s\n", node.name)
+		return ctx.Error("internal error: block_wrapper == nil in tagBlockNode.Execute()", nil)
+	}
+	err := block_wrapper.Execute(ctx, buffer)
+	if err != nil {
+		return err
+	}
+
+	// TODO: Add support for {{ block.super }}
+
+	return nil
+}
+
+func tagBlockParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	if arguments.Count() == 0 {
+		return nil, arguments.Error("Tag 'block' requires an identifier.", nil)
+	}
+
+	name_token := arguments.MatchType(TokenIdentifier)
+	if name_token == nil {
+		return nil, arguments.Error("First argument for tag 'block' must be an identifier.", nil)
+	}
+
+	if arguments.Remaining() != 0 {
+		return nil, arguments.Error("Tag 'block' takes exactly 1 argument (an identifier).", nil)
+	}
+
+	wrapper, endtagargs, err := doc.WrapUntilTag("endblock")
+	if err != nil {
+		return nil, err
+	}
+	if endtagargs.Remaining() > 0 {
+		endtagname_token := endtagargs.MatchType(TokenIdentifier)
+		if endtagname_token != nil {
+			if endtagname_token.Val != name_token.Val {
+				return nil, endtagargs.Error(fmt.Sprintf("Name for 'endblock' must equal to 'block'-tag's name ('%s' != '%s').",
+					name_token.Val, endtagname_token.Val), nil)
+			}
+		}
+
+		if endtagname_token == nil || endtagargs.Remaining() > 0 {
+			return nil, endtagargs.Error("Either no or only one argument (identifier) allowed for 'endblock'.", nil)
+		}
+	}
+
+	tpl := doc.template
+	if tpl == nil {
+		panic("internal error: tpl == nil")
+	}
+	_, has_block := tpl.blocks[name_token.Val]
+	if !has_block {
+		tpl.blocks[name_token.Val] = wrapper
+	} else {
+		return nil, arguments.Error(fmt.Sprintf("Block named '%s' already defined", name_token.Val), nil)
+	}
+
+	return &tagBlockNode{name: name_token.Val}, nil
+}
+
+func init() {
+	RegisterTag("block", tagBlockParser)
+}

vendor/github.com/flosch/pongo2/tags_comment.go

@@ -0,0 +1,31 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagCommentNode struct{}
+
+func (node *tagCommentNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	return nil
+}
+
+func tagCommentParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	comment_node := &tagCommentNode{}
+
+	// TODO: Process the endtag's arguments (see django 'comment'-tag documentation)
+	_, _, err := doc.WrapUntilTag("endcomment")
+	if err != nil {
+		return nil, err
+	}
+
+	if arguments.Count() != 0 {
+		return nil, arguments.Error("Tag 'comment' does not take any argument.", nil)
+	}
+
+	return comment_node, nil
+}
+
+func init() {
+	RegisterTag("comment", tagCommentParser)
+}

vendor/github.com/flosch/pongo2/tags_cycle.go

@@ -0,0 +1,110 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagCycleValue struct {
+	node  *tagCycleNode
+	value *Value
+}
+
+type tagCycleNode struct {
+	position *Token
+	args     []IEvaluator
+	idx      int
+	as_name  string
+	silent   bool
+}
+
+func (cv *tagCycleValue) String() string {
+	return cv.value.String()
+}
+
+func (node *tagCycleNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	item := node.args[node.idx%len(node.args)]
+	node.idx++
+
+	val, err := item.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+
+	if t, ok := val.Interface().(*tagCycleValue); ok {
+		// {% cycle "test1" "test2"
+		// {% cycle cycleitem %}
+
+		// Update the cycle value with next value
+		item := t.node.args[t.node.idx%len(t.node.args)]
+		t.node.idx++
+
+		val, err := item.Evaluate(ctx)
+		if err != nil {
+			return err
+		}
+
+		t.value = val
+
+		if !t.node.silent {
+			buffer.WriteString(val.String())
+		}
+	} else {
+		// Regular call
+
+		cycle_value := &tagCycleValue{
+			node:  node,
+			value: val,
+		}
+
+		if node.as_name != "" {
+			ctx.Private[node.as_name] = cycle_value
+		}
+		if !node.silent {
+			buffer.WriteString(val.String())
+		}
+	}
+
+	return nil
+}
+
+// HINT: We're not supporting the old comma-seperated list of expresions argument-style
+func tagCycleParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	cycle_node := &tagCycleNode{
+		position: start,
+	}
+
+	for arguments.Remaining() > 0 {
+		node, err := arguments.ParseExpression()
+		if err != nil {
+			return nil, err
+		}
+		cycle_node.args = append(cycle_node.args, node)
+
+		if arguments.MatchOne(TokenKeyword, "as") != nil {
+			// as
+
+			name_token := arguments.MatchType(TokenIdentifier)
+			if name_token == nil {
+				return nil, arguments.Error("Name (identifier) expected after 'as'.", nil)
+			}
+			cycle_node.as_name = name_token.Val
+
+			if arguments.MatchOne(TokenIdentifier, "silent") != nil {
+				cycle_node.silent = true
+			}
+
+			// Now we're finished
+			break
+		}
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed cycle-tag.", nil)
+	}
+
+	return cycle_node, nil
+}
+
+func init() {
+	RegisterTag("cycle", tagCycleParser)
+}

vendor/github.com/flosch/pongo2/tags_extends.go

@@ -0,0 +1,56 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagExtendsNode struct {
+	filename string
+}
+
+func (node *tagExtendsNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	return nil
+}
+
+func tagExtendsParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	extends_node := &tagExtendsNode{}
+
+	if doc.template.level > 1 {
+		return nil, arguments.Error("The 'extends' tag can only defined on root level.", start)
+	}
+
+	if doc.template.parent != nil {
+		// Already one parent
+		return nil, arguments.Error("This template has already one parent.", start)
+	}
+
+	if filename_token := arguments.MatchType(TokenString); filename_token != nil {
+		// prepared, static template
+
+		// Get parent's filename
+		parent_filename := doc.template.set.resolveFilename(doc.template, filename_token.Val)
+
+		// Parse the parent
+		parent_template, err := doc.template.set.FromFile(parent_filename)
+		if err != nil {
+			return nil, err.(*Error)
+		}
+
+		// Keep track of things
+		parent_template.child = doc.template
+		doc.template.parent = parent_template
+		extends_node.filename = parent_filename
+	} else {
+		return nil, arguments.Error("Tag 'extends' requires a template filename as string.", nil)
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Tag 'extends' does only take 1 argument.", nil)
+	}
+
+	return extends_node, nil
+}
+
+func init() {
+	RegisterTag("extends", tagExtendsParser)
+}

vendor/github.com/flosch/pongo2/tags_filter.go

@@ -0,0 +1,95 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type nodeFilterCall struct {
+	name       string
+	param_expr IEvaluator
+}
+
+type tagFilterNode struct {
+	position    *Token
+	bodyWrapper *NodeWrapper
+	filterChain []*nodeFilterCall
+}
+
+func (node *tagFilterNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	temp := bytes.NewBuffer(make([]byte, 0, 1024)) // 1 KiB size
+
+	err := node.bodyWrapper.Execute(ctx, temp)
+	if err != nil {
+		return err
+	}
+
+	value := AsValue(temp.String())
+
+	for _, call := range node.filterChain {
+		var param *Value
+		if call.param_expr != nil {
+			param, err = call.param_expr.Evaluate(ctx)
+			if err != nil {
+				return err
+			}
+		} else {
+			param = AsValue(nil)
+		}
+		value, err = ApplyFilter(call.name, value, param)
+		if err != nil {
+			return ctx.Error(err.Error(), node.position)
+		}
+	}
+
+	buffer.WriteString(value.String())
+
+	return nil
+}
+
+func tagFilterParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	filter_node := &tagFilterNode{
+		position: start,
+	}
+
+	wrapper, _, err := doc.WrapUntilTag("endfilter")
+	if err != nil {
+		return nil, err
+	}
+	filter_node.bodyWrapper = wrapper
+
+	for arguments.Remaining() > 0 {
+		filterCall := &nodeFilterCall{}
+
+		name_token := arguments.MatchType(TokenIdentifier)
+		if name_token == nil {
+			return nil, arguments.Error("Expected a filter name (identifier).", nil)
+		}
+		filterCall.name = name_token.Val
+
+		if arguments.MatchOne(TokenSymbol, ":") != nil {
+			// Filter parameter
+			// NOTICE: we can't use ParseExpression() here, because it would parse the next filter "|..." as well in the argument list
+			expr, err := arguments.parseVariableOrLiteral()
+			if err != nil {
+				return nil, err
+			}
+			filterCall.param_expr = expr
+		}
+
+		filter_node.filterChain = append(filter_node.filterChain, filterCall)
+
+		if arguments.MatchOne(TokenSymbol, "|") == nil {
+			break
+		}
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed filter-tag arguments.", nil)
+	}
+
+	return filter_node, nil
+}
+
+func init() {
+	RegisterTag("filter", tagFilterParser)
+}

vendor/github.com/flosch/pongo2/tags_firstof.go

@@ -0,0 +1,53 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagFirstofNode struct {
+	position *Token
+	args     []IEvaluator
+}
+
+func (node *tagFirstofNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	for _, arg := range node.args {
+		val, err := arg.Evaluate(ctx)
+		if err != nil {
+			return err
+		}
+
+		if val.IsTrue() {
+			if ctx.Autoescape && !arg.FilterApplied("safe") {
+				val, err = ApplyFilter("escape", val, nil)
+				if err != nil {
+					return err
+				}
+			}
+
+			buffer.WriteString(val.String())
+			return nil
+		}
+	}
+
+	return nil
+}
+
+func tagFirstofParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	firstof_node := &tagFirstofNode{
+		position: start,
+	}
+
+	for arguments.Remaining() > 0 {
+		node, err := arguments.ParseExpression()
+		if err != nil {
+			return nil, err
+		}
+		firstof_node.args = append(firstof_node.args, node)
+	}
+
+	return firstof_node, nil
+}
+
+func init() {
+	RegisterTag("firstof", tagFirstofParser)
+}

vendor/github.com/flosch/pongo2/tags_for.go

@@ -0,0 +1,158 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagForNode struct {
+	key              string
+	value            string // only for maps: for key, value in map
+	object_evaluator IEvaluator
+	reversed         bool
+
+	bodyWrapper  *NodeWrapper
+	emptyWrapper *NodeWrapper
+}
+
+type tagForLoopInformation struct {
+	Counter     int
+	Counter0    int
+	Revcounter  int
+	Revcounter0 int
+	First       bool
+	Last        bool
+	Parentloop  *tagForLoopInformation
+}
+
+func (node *tagForNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) (forError *Error) {
+	// Backup forloop (as parentloop in public context), key-name and value-name
+	forCtx := NewChildExecutionContext(ctx)
+	parentloop := forCtx.Private["forloop"]
+
+	// Create loop struct
+	loopInfo := &tagForLoopInformation{
+		First: true,
+	}
+
+	// Is it a loop in a loop?
+	if parentloop != nil {
+		loopInfo.Parentloop = parentloop.(*tagForLoopInformation)
+	}
+
+	// Register loopInfo in public context
+	forCtx.Private["forloop"] = loopInfo
+
+	obj, err := node.object_evaluator.Evaluate(forCtx)
+	if err != nil {
+		return err
+	}
+
+	obj.IterateOrder(func(idx, count int, key, value *Value) bool {
+		// There's something to iterate over (correct type and at least 1 item)
+
+		// Update loop infos and public context
+		forCtx.Private[node.key] = key
+		if value != nil {
+			forCtx.Private[node.value] = value
+		}
+		loopInfo.Counter = idx + 1
+		loopInfo.Counter0 = idx
+		if idx == 1 {
+			loopInfo.First = false
+		}
+		if idx+1 == count {
+			loopInfo.Last = true
+		}
+		loopInfo.Revcounter = count - idx        // TODO: Not sure about this, have to look it up
+		loopInfo.Revcounter0 = count - (idx + 1) // TODO: Not sure about this, have to look it up
+
+		// Render elements with updated context
+		err := node.bodyWrapper.Execute(forCtx, buffer)
+		if err != nil {
+			forError = err
+			return false
+		}
+		return true
+	}, func() {
+		// Nothing to iterate over (maybe wrong type or no items)
+		if node.emptyWrapper != nil {
+			err := node.emptyWrapper.Execute(forCtx, buffer)
+			if err != nil {
+				forError = err
+			}
+		}
+	}, node.reversed)
+
+	return nil
+}
+
+func tagForParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	for_node := &tagForNode{}
+
+	// Arguments parsing
+	var value_token *Token
+	key_token := arguments.MatchType(TokenIdentifier)
+	if key_token == nil {
+		return nil, arguments.Error("Expected an key identifier as first argument for 'for'-tag", nil)
+	}
+
+	if arguments.Match(TokenSymbol, ",") != nil {
+		// Value name is provided
+		value_token = arguments.MatchType(TokenIdentifier)
+		if value_token == nil {
+			return nil, arguments.Error("Value name must be an identifier.", nil)
+		}
+	}
+
+	if arguments.Match(TokenKeyword, "in") == nil {
+		return nil, arguments.Error("Expected keyword 'in'.", nil)
+	}
+
+	object_evaluator, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	for_node.object_evaluator = object_evaluator
+	for_node.key = key_token.Val
+	if value_token != nil {
+		for_node.value = value_token.Val
+	}
+
+	if arguments.MatchOne(TokenIdentifier, "reversed") != nil {
+		for_node.reversed = true
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed for-loop arguments.", nil)
+	}
+
+	// Body wrapping
+	wrapper, endargs, err := doc.WrapUntilTag("empty", "endfor")
+	if err != nil {
+		return nil, err
+	}
+	for_node.bodyWrapper = wrapper
+
+	if endargs.Count() > 0 {
+		return nil, endargs.Error("Arguments not allowed here.", nil)
+	}
+
+	if wrapper.Endtag == "empty" {
+		// if there's an else in the if-statement, we need the else-Block as well
+		wrapper, endargs, err = doc.WrapUntilTag("endfor")
+		if err != nil {
+			return nil, err
+		}
+		for_node.emptyWrapper = wrapper
+
+		if endargs.Count() > 0 {
+			return nil, endargs.Error("Arguments not allowed here.", nil)
+		}
+	}
+
+	return for_node, nil
+}
+
+func init() {
+	RegisterTag("for", tagForParser)
+}

vendor/github.com/flosch/pongo2/tags_if.go

@@ -0,0 +1,81 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagIfNode struct {
+	conditions []IEvaluator
+	wrappers   []*NodeWrapper
+}
+
+func (node *tagIfNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	for i, condition := range node.conditions {
+		result, err := condition.Evaluate(ctx)
+		if err != nil {
+			return err
+		}
+
+		if result.IsTrue() {
+			return node.wrappers[i].Execute(ctx, buffer)
+		} else {
+			// Last condition?
+			if len(node.conditions) == i+1 && len(node.wrappers) > i+1 {
+				return node.wrappers[i+1].Execute(ctx, buffer)
+			}
+		}
+	}
+	return nil
+}
+
+func tagIfParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	if_node := &tagIfNode{}
+
+	// Parse first and main IF condition
+	condition, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	if_node.conditions = append(if_node.conditions, condition)
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("If-condition is malformed.", nil)
+	}
+
+	// Check the rest
+	for {
+		wrapper, tag_args, err := doc.WrapUntilTag("elif", "else", "endif")
+		if err != nil {
+			return nil, err
+		}
+		if_node.wrappers = append(if_node.wrappers, wrapper)
+
+		if wrapper.Endtag == "elif" {
+			// elif can take a condition
+			condition, err := tag_args.ParseExpression()
+			if err != nil {
+				return nil, err
+			}
+			if_node.conditions = append(if_node.conditions, condition)
+
+			if tag_args.Remaining() > 0 {
+				return nil, tag_args.Error("Elif-condition is malformed.", nil)
+			}
+		} else {
+			if tag_args.Count() > 0 {
+				// else/endif can't take any conditions
+				return nil, tag_args.Error("Arguments not allowed here.", nil)
+			}
+		}
+
+		if wrapper.Endtag == "endif" {
+			break
+		}
+	}
+
+	return if_node, nil
+}
+
+func init() {
+	RegisterTag("if", tagIfParser)
+}

vendor/github.com/flosch/pongo2/tags_ifchanged.go

@@ -0,0 +1,117 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagIfchangedNode struct {
+	watched_expr []IEvaluator
+	last_values  []*Value
+	last_content []byte
+	thenWrapper  *NodeWrapper
+	elseWrapper  *NodeWrapper
+}
+
+func (node *tagIfchangedNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+
+	if len(node.watched_expr) == 0 {
+		// Check against own rendered body
+
+		buf := bytes.NewBuffer(make([]byte, 0, 1024)) // 1 KiB
+		err := node.thenWrapper.Execute(ctx, buf)
+		if err != nil {
+			return err
+		}
+
+		buf_bytes := buf.Bytes()
+		if !bytes.Equal(node.last_content, buf_bytes) {
+			// Rendered content changed, output it
+			buffer.Write(buf_bytes)
+			node.last_content = buf_bytes
+		}
+	} else {
+		now_values := make([]*Value, 0, len(node.watched_expr))
+		for _, expr := range node.watched_expr {
+			val, err := expr.Evaluate(ctx)
+			if err != nil {
+				return err
+			}
+			now_values = append(now_values, val)
+		}
+
+		// Compare old to new values now
+		changed := len(node.last_values) == 0
+
+		for idx, old_val := range node.last_values {
+			if !old_val.EqualValueTo(now_values[idx]) {
+				changed = true
+				break // we can stop here because ONE value changed
+			}
+		}
+
+		node.last_values = now_values
+
+		if changed {
+			// Render thenWrapper
+			err := node.thenWrapper.Execute(ctx, buffer)
+			if err != nil {
+				return err
+			}
+		} else {
+			// Render elseWrapper
+			err := node.elseWrapper.Execute(ctx, buffer)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func tagIfchangedParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	ifchanged_node := &tagIfchangedNode{}
+
+	for arguments.Remaining() > 0 {
+		// Parse condition
+		expr, err := arguments.ParseExpression()
+		if err != nil {
+			return nil, err
+		}
+		ifchanged_node.watched_expr = append(ifchanged_node.watched_expr, expr)
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Ifchanged-arguments are malformed.", nil)
+	}
+
+	// Wrap then/else-blocks
+	wrapper, endargs, err := doc.WrapUntilTag("else", "endifchanged")
+	if err != nil {
+		return nil, err
+	}
+	ifchanged_node.thenWrapper = wrapper
+
+	if endargs.Count() > 0 {
+		return nil, endargs.Error("Arguments not allowed here.", nil)
+	}
+
+	if wrapper.Endtag == "else" {
+		// if there's an else in the if-statement, we need the else-Block as well
+		wrapper, endargs, err = doc.WrapUntilTag("endifchanged")
+		if err != nil {
+			return nil, err
+		}
+		ifchanged_node.elseWrapper = wrapper
+
+		if endargs.Count() > 0 {
+			return nil, endargs.Error("Arguments not allowed here.", nil)
+		}
+	}
+
+	return ifchanged_node, nil
+}
+
+func init() {
+	RegisterTag("ifchanged", tagIfchangedParser)
+}

vendor/github.com/flosch/pongo2/tags_ifequal.go

@@ -0,0 +1,83 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagIfEqualNode struct {
+	var1, var2  IEvaluator
+	thenWrapper *NodeWrapper
+	elseWrapper *NodeWrapper
+}
+
+func (node *tagIfEqualNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	r1, err := node.var1.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+	r2, err := node.var2.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+
+	result := r1.EqualValueTo(r2)
+
+	if result {
+		return node.thenWrapper.Execute(ctx, buffer)
+	} else {
+		if node.elseWrapper != nil {
+			return node.elseWrapper.Execute(ctx, buffer)
+		}
+	}
+	return nil
+}
+
+func tagIfEqualParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	ifequal_node := &tagIfEqualNode{}
+
+	// Parse two expressions
+	var1, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	var2, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	ifequal_node.var1 = var1
+	ifequal_node.var2 = var2
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("ifequal only takes 2 arguments.", nil)
+	}
+
+	// Wrap then/else-blocks
+	wrapper, endargs, err := doc.WrapUntilTag("else", "endifequal")
+	if err != nil {
+		return nil, err
+	}
+	ifequal_node.thenWrapper = wrapper
+
+	if endargs.Count() > 0 {
+		return nil, endargs.Error("Arguments not allowed here.", nil)
+	}
+
+	if wrapper.Endtag == "else" {
+		// if there's an else in the if-statement, we need the else-Block as well
+		wrapper, endargs, err = doc.WrapUntilTag("endifequal")
+		if err != nil {
+			return nil, err
+		}
+		ifequal_node.elseWrapper = wrapper
+
+		if endargs.Count() > 0 {
+			return nil, endargs.Error("Arguments not allowed here.", nil)
+		}
+	}
+
+	return ifequal_node, nil
+}
+
+func init() {
+	RegisterTag("ifequal", tagIfEqualParser)
+}

vendor/github.com/flosch/pongo2/tags_ifnotequal.go

@@ -0,0 +1,83 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagIfNotEqualNode struct {
+	var1, var2  IEvaluator
+	thenWrapper *NodeWrapper
+	elseWrapper *NodeWrapper
+}
+
+func (node *tagIfNotEqualNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	r1, err := node.var1.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+	r2, err := node.var2.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+
+	result := !r1.EqualValueTo(r2)
+
+	if result {
+		return node.thenWrapper.Execute(ctx, buffer)
+	} else {
+		if node.elseWrapper != nil {
+			return node.elseWrapper.Execute(ctx, buffer)
+		}
+	}
+	return nil
+}
+
+func tagIfNotEqualParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	ifnotequal_node := &tagIfNotEqualNode{}
+
+	// Parse two expressions
+	var1, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	var2, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	ifnotequal_node.var1 = var1
+	ifnotequal_node.var2 = var2
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("ifequal only takes 2 arguments.", nil)
+	}
+
+	// Wrap then/else-blocks
+	wrapper, endargs, err := doc.WrapUntilTag("else", "endifequal")
+	if err != nil {
+		return nil, err
+	}
+	ifnotequal_node.thenWrapper = wrapper
+
+	if endargs.Count() > 0 {
+		return nil, endargs.Error("Arguments not allowed here.", nil)
+	}
+
+	if wrapper.Endtag == "else" {
+		// if there's an else in the if-statement, we need the else-Block as well
+		wrapper, endargs, err = doc.WrapUntilTag("endifequal")
+		if err != nil {
+			return nil, err
+		}
+		ifnotequal_node.elseWrapper = wrapper
+
+		if endargs.Count() > 0 {
+			return nil, endargs.Error("Arguments not allowed here.", nil)
+		}
+	}
+
+	return ifnotequal_node, nil
+}
+
+func init() {
+	RegisterTag("ifnotequal", tagIfNotEqualParser)
+}

vendor/github.com/flosch/pongo2/tags_import.go

@@ -0,0 +1,86 @@
+package pongo2
+
+import (
+	"bytes"
+	"fmt"
+)
+
+type tagImportNode struct {
+	position *Token
+	filename string
+	template *Template
+	macros   map[string]*tagMacroNode // alias/name -> macro instance
+}
+
+func (node *tagImportNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	for name, macro := range node.macros {
+		func(name string, macro *tagMacroNode) {
+			ctx.Private[name] = func(args ...*Value) *Value {
+				return macro.call(ctx, args...)
+			}
+		}(name, macro)
+	}
+	return nil
+}
+
+func tagImportParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	import_node := &tagImportNode{
+		position: start,
+		macros:   make(map[string]*tagMacroNode),
+	}
+
+	filename_token := arguments.MatchType(TokenString)
+	if filename_token == nil {
+		return nil, arguments.Error("Import-tag needs a filename as string.", nil)
+	}
+
+	import_node.filename = doc.template.set.resolveFilename(doc.template, filename_token.Val)
+
+	if arguments.Remaining() == 0 {
+		return nil, arguments.Error("You must at least specify one macro to import.", nil)
+	}
+
+	// Compile the given template
+	tpl, err := doc.template.set.FromFile(import_node.filename)
+	if err != nil {
+		return nil, err.(*Error).updateFromTokenIfNeeded(doc.template, start)
+	}
+
+	for arguments.Remaining() > 0 {
+		macro_name_token := arguments.MatchType(TokenIdentifier)
+		if macro_name_token == nil {
+			return nil, arguments.Error("Expected macro name (identifier).", nil)
+		}
+
+		as_name := macro_name_token.Val
+		if arguments.Match(TokenKeyword, "as") != nil {
+			alias_token := arguments.MatchType(TokenIdentifier)
+			if alias_token == nil {
+				return nil, arguments.Error("Expected macro alias name (identifier).", nil)
+			}
+			as_name = alias_token.Val
+		}
+
+		macro_instance, has := tpl.exported_macros[macro_name_token.Val]
+		if !has {
+			return nil, arguments.Error(fmt.Sprintf("Macro '%s' not found (or not exported) in '%s'.", macro_name_token.Val,
+				import_node.filename), macro_name_token)
+		}
+
+		import_node.macros[as_name] = macro_instance
+
+		if arguments.Remaining() == 0 {
+			break
+		}
+
+		if arguments.Match(TokenSymbol, ",") == nil {
+			return nil, arguments.Error("Expected ','.", nil)
+		}
+	}
+
+	return import_node, nil
+}
+
+func init() {
+	RegisterTag("import", tagImportParser)
+}

vendor/github.com/flosch/pongo2/tags_include.go

@@ -0,0 +1,132 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagIncludeNode struct {
+	tpl                *Template
+	filename_evaluator IEvaluator
+	lazy               bool
+	only               bool
+	filename           string
+	with_pairs         map[string]IEvaluator
+}
+
+func (node *tagIncludeNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	// Building the context for the template
+	include_ctx := make(Context)
+
+	// Fill the context with all data from the parent
+	if !node.only {
+		include_ctx.Update(ctx.Public)
+		include_ctx.Update(ctx.Private)
+	}
+
+	// Put all custom with-pairs into the context
+	for key, value := range node.with_pairs {
+		val, err := value.Evaluate(ctx)
+		if err != nil {
+			return err
+		}
+		include_ctx[key] = val
+	}
+
+	// Execute the template
+	if node.lazy {
+		// Evaluate the filename
+		filename, err := node.filename_evaluator.Evaluate(ctx)
+		if err != nil {
+			return err
+		}
+
+		if filename.String() == "" {
+			return ctx.Error("Filename for 'include'-tag evaluated to an empty string.", nil)
+		}
+
+		// Get include-filename
+		included_filename := ctx.template.set.resolveFilename(ctx.template, filename.String())
+
+		included_tpl, err2 := ctx.template.set.FromFile(included_filename)
+		if err2 != nil {
+			return err2.(*Error)
+		}
+		err2 = included_tpl.ExecuteWriter(include_ctx, buffer)
+		if err2 != nil {
+			return err2.(*Error)
+		}
+		return nil
+	} else {
+		// Template is already parsed with static filename
+		err := node.tpl.ExecuteWriter(include_ctx, buffer)
+		if err != nil {
+			return err.(*Error)
+		}
+		return nil
+	}
+}
+
+func tagIncludeParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	include_node := &tagIncludeNode{
+		with_pairs: make(map[string]IEvaluator),
+	}
+
+	if filename_token := arguments.MatchType(TokenString); filename_token != nil {
+		// prepared, static template
+
+		// Get include-filename
+		included_filename := doc.template.set.resolveFilename(doc.template, filename_token.Val)
+
+		// Parse the parent
+		include_node.filename = included_filename
+		included_tpl, err := doc.template.set.FromFile(included_filename)
+		if err != nil {
+			return nil, err.(*Error).updateFromTokenIfNeeded(doc.template, filename_token)
+		}
+		include_node.tpl = included_tpl
+	} else {
+		// No String, then the user wants to use lazy-evaluation (slower, but possible)
+		filename_evaluator, err := arguments.ParseExpression()
+		if err != nil {
+			return nil, err.updateFromTokenIfNeeded(doc.template, filename_token)
+		}
+		include_node.filename_evaluator = filename_evaluator
+		include_node.lazy = true
+	}
+
+	// After having parsed the filename we're gonna parse the with+only options
+	if arguments.Match(TokenIdentifier, "with") != nil {
+		for arguments.Remaining() > 0 {
+			// We have at least one key=expr pair (because of starting "with")
+			key_token := arguments.MatchType(TokenIdentifier)
+			if key_token == nil {
+				return nil, arguments.Error("Expected an identifier", nil)
+			}
+			if arguments.Match(TokenSymbol, "=") == nil {
+				return nil, arguments.Error("Expected '='.", nil)
+			}
+			value_expr, err := arguments.ParseExpression()
+			if err != nil {
+				return nil, err.updateFromTokenIfNeeded(doc.template, key_token)
+			}
+
+			include_node.with_pairs[key_token.Val] = value_expr
+
+			// Only?
+			if arguments.Match(TokenIdentifier, "only") != nil {
+				include_node.only = true
+				break // stop parsing arguments because it's the last option
+			}
+		}
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed 'include'-tag arguments.", nil)
+	}
+
+	return include_node, nil
+}
+
+func init() {
+	RegisterTag("include", tagIncludeParser)
+}

vendor/github.com/flosch/pongo2/tags_lorem.go

@@ -0,0 +1,132 @@
+package pongo2
+
+import (
+	"bytes"
+	"math/rand"
+	"strings"
+	"time"
+)
+
+var (
+	tagLoremParagraphs = strings.Split(tagLoremText, "\n")
+	tagLoremWords      = strings.Fields(tagLoremText)
+)
+
+type tagLoremNode struct {
+	position *Token
+	count    int    // number of paragraphs
+	method   string // w = words, p = HTML paragraphs, b = plain-text (default is b)
+	random   bool   // does not use the default paragraph "Lorem ipsum dolor sit amet, ..."
+}
+
+func (node *tagLoremNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	switch node.method {
+	case "b":
+		if node.random {
+			for i := 0; i < node.count; i++ {
+				if i > 0 {
+					buffer.WriteString("\n")
+				}
+				par := tagLoremParagraphs[rand.Intn(len(tagLoremParagraphs))]
+				buffer.WriteString(par)
+			}
+		} else {
+			for i := 0; i < node.count; i++ {
+				if i > 0 {
+					buffer.WriteString("\n")
+				}
+				par := tagLoremParagraphs[i%len(tagLoremParagraphs)]
+				buffer.WriteString(par)
+			}
+		}
+	case "w":
+		if node.random {
+			for i := 0; i < node.count; i++ {
+				if i > 0 {
+					buffer.WriteString(" ")
+				}
+				word := tagLoremWords[rand.Intn(len(tagLoremWords))]
+				buffer.WriteString(word)
+			}
+		} else {
+			for i := 0; i < node.count; i++ {
+				if i > 0 {
+					buffer.WriteString(" ")
+				}
+				word := tagLoremWords[i%len(tagLoremWords)]
+				buffer.WriteString(word)
+			}
+		}
+	case "p":
+		if node.random {
+			for i := 0; i < node.count; i++ {
+				if i > 0 {
+					buffer.WriteString("\n")
+				}
+				buffer.WriteString("<p>")
+				par := tagLoremParagraphs[rand.Intn(len(tagLoremParagraphs))]
+				buffer.WriteString(par)
+				buffer.WriteString("</p>")
+			}
+		} else {
+			for i := 0; i < node.count; i++ {
+				if i > 0 {
+					buffer.WriteString("\n")
+				}
+				buffer.WriteString("<p>")
+				par := tagLoremParagraphs[i%len(tagLoremParagraphs)]
+				buffer.WriteString(par)
+				buffer.WriteString("</p>")
+
+			}
+		}
+	default:
+		panic("unsupported method")
+	}
+
+	return nil
+}
+
+func tagLoremParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	lorem_node := &tagLoremNode{
+		position: start,
+		count:    1,
+		method:   "b",
+	}
+
+	if count_token := arguments.MatchType(TokenNumber); count_token != nil {
+		lorem_node.count = AsValue(count_token.Val).Integer()
+	}
+
+	if method_token := arguments.MatchType(TokenIdentifier); method_token != nil {
+		if method_token.Val != "w" && method_token.Val != "p" && method_token.Val != "b" {
+			return nil, arguments.Error("lorem-method must be either 'w', 'p' or 'b'.", nil)
+		}
+
+		lorem_node.method = method_token.Val
+	}
+
+	if arguments.MatchOne(TokenIdentifier, "random") != nil {
+		lorem_node.random = true
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed lorem-tag arguments.", nil)
+	}
+
+	return lorem_node, nil
+}
+
+func init() {
+	rand.Seed(time.Now().Unix())
+
+	RegisterTag("lorem", tagLoremParser)
+}
+
+const tagLoremText = `Lorem ipsum dolor sit amet, consectetur adipisici elit, sed eiusmod tempor incidunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquid ex ea commodi consequat. Quis aute iure reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint obcaecat cupiditat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.
+Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.
+Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat.
+Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis.
+At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, At accusam aliquyam diam diam dolore dolores duo eirmod eos erat, et nonumy sed tempor et et invidunt justo labore Stet clita ea et gubergren, kasd magna no rebum. sanctus sea sed takimata ut vero voluptua. est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.
+Consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.`

vendor/github.com/flosch/pongo2/tags_macro.go

@@ -0,0 +1,149 @@
+package pongo2
+
+import (
+	"bytes"
+	"fmt"
+)
+
+type tagMacroNode struct {
+	position   *Token
+	name       string
+	args_order []string
+	args       map[string]IEvaluator
+	exported   bool
+
+	wrapper *NodeWrapper
+}
+
+func (node *tagMacroNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	ctx.Private[node.name] = func(args ...*Value) *Value {
+		return node.call(ctx, args...)
+	}
+
+	return nil
+}
+
+func (node *tagMacroNode) call(ctx *ExecutionContext, args ...*Value) *Value {
+	args_ctx := make(Context)
+
+	for k, v := range node.args {
+		if v == nil {
+			// User did not provided a default value
+			args_ctx[k] = nil
+		} else {
+			// Evaluate the default value
+			value_expr, err := v.Evaluate(ctx)
+			if err != nil {
+				ctx.Logf(err.Error())
+				return AsSafeValue(err.Error())
+			}
+
+			args_ctx[k] = value_expr
+		}
+	}
+
+	if len(args) > len(node.args_order) {
+		// Too many arguments, we're ignoring them and just logging into debug mode.
+		err := ctx.Error(fmt.Sprintf("Macro '%s' called with too many arguments (%d instead of %d).",
+			node.name, len(args), len(node.args_order)), nil).updateFromTokenIfNeeded(ctx.template, node.position)
+
+		ctx.Logf(err.Error()) // TODO: This is a workaround, because the error is not returned yet to the Execution()-methods
+		return AsSafeValue(err.Error())
+	}
+
+	// Make a context for the macro execution
+	macroCtx := NewChildExecutionContext(ctx)
+
+	// Register all arguments in the private context
+	macroCtx.Private.Update(args_ctx)
+
+	for idx, arg_value := range args {
+		macroCtx.Private[node.args_order[idx]] = arg_value.Interface()
+	}
+
+	var b bytes.Buffer
+	err := node.wrapper.Execute(macroCtx, &b)
+	if err != nil {
+		return AsSafeValue(err.updateFromTokenIfNeeded(ctx.template, node.position).Error())
+	}
+
+	return AsSafeValue(b.String())
+}
+
+func tagMacroParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	macro_node := &tagMacroNode{
+		position: start,
+		args:     make(map[string]IEvaluator),
+	}
+
+	name_token := arguments.MatchType(TokenIdentifier)
+	if name_token == nil {
+		return nil, arguments.Error("Macro-tag needs at least an identifier as name.", nil)
+	}
+	macro_node.name = name_token.Val
+
+	if arguments.MatchOne(TokenSymbol, "(") == nil {
+		return nil, arguments.Error("Expected '('.", nil)
+	}
+
+	for arguments.Match(TokenSymbol, ")") == nil {
+		arg_name_token := arguments.MatchType(TokenIdentifier)
+		if arg_name_token == nil {
+			return nil, arguments.Error("Expected argument name as identifier.", nil)
+		}
+		macro_node.args_order = append(macro_node.args_order, arg_name_token.Val)
+
+		if arguments.Match(TokenSymbol, "=") != nil {
+			// Default expression follows
+			arg_default_expr, err := arguments.ParseExpression()
+			if err != nil {
+				return nil, err
+			}
+			macro_node.args[arg_name_token.Val] = arg_default_expr
+		} else {
+			// No default expression
+			macro_node.args[arg_name_token.Val] = nil
+		}
+
+		if arguments.Match(TokenSymbol, ")") != nil {
+			break
+		}
+		if arguments.Match(TokenSymbol, ",") == nil {
+			return nil, arguments.Error("Expected ',' or ')'.", nil)
+		}
+	}
+
+	if arguments.Match(TokenKeyword, "export") != nil {
+		macro_node.exported = true
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed macro-tag.", nil)
+	}
+
+	// Body wrapping
+	wrapper, endargs, err := doc.WrapUntilTag("endmacro")
+	if err != nil {
+		return nil, err
+	}
+	macro_node.wrapper = wrapper
+
+	if endargs.Count() > 0 {
+		return nil, endargs.Error("Arguments not allowed here.", nil)
+	}
+
+	if macro_node.exported {
+		// Now register the macro if it wants to be exported
+		_, has := doc.template.exported_macros[macro_node.name]
+		if has {
+			return nil, doc.Error(fmt.Sprintf("Another macro with name '%s' already exported.", macro_node.name), start)
+		}
+		doc.template.exported_macros[macro_node.name] = macro_node
+	}
+
+	return macro_node, nil
+}
+
+func init() {
+	RegisterTag("macro", tagMacroParser)
+}

vendor/github.com/flosch/pongo2/tags_now.go

@@ -0,0 +1,51 @@
+package pongo2
+
+import (
+	"bytes"
+	"time"
+)
+
+type tagNowNode struct {
+	position *Token
+	format   string
+	fake     bool
+}
+
+func (node *tagNowNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	var t time.Time
+	if node.fake {
+		t = time.Date(2014, time.February, 05, 18, 31, 45, 00, time.UTC)
+	} else {
+		t = time.Now()
+	}
+
+	buffer.WriteString(t.Format(node.format))
+
+	return nil
+}
+
+func tagNowParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	now_node := &tagNowNode{
+		position: start,
+	}
+
+	format_token := arguments.MatchType(TokenString)
+	if format_token == nil {
+		return nil, arguments.Error("Expected a format string.", nil)
+	}
+	now_node.format = format_token.Val
+
+	if arguments.MatchOne(TokenIdentifier, "fake") != nil {
+		now_node.fake = true
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed now-tag arguments.", nil)
+	}
+
+	return now_node, nil
+}
+
+func init() {
+	RegisterTag("now", tagNowParser)
+}

vendor/github.com/flosch/pongo2/tags_set.go

@@ -0,0 +1,52 @@
+package pongo2
+
+import "bytes"
+
+type tagSetNode struct {
+	name       string
+	expression IEvaluator
+}
+
+func (node *tagSetNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	// Evaluate expression
+	value, err := node.expression.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+
+	ctx.Private[node.name] = value
+	return nil
+}
+
+func tagSetParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	node := &tagSetNode{}
+
+	// Parse variable name
+	typeToken := arguments.MatchType(TokenIdentifier)
+	if typeToken == nil {
+		return nil, arguments.Error("Expected an identifier.", nil)
+	}
+	node.name = typeToken.Val
+
+	if arguments.Match(TokenSymbol, "=") == nil {
+		return nil, arguments.Error("Expected '='.", nil)
+	}
+
+	// Variable expression
+	keyExpression, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	node.expression = keyExpression
+
+	// Remaining arguments
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed 'set'-tag arguments.", nil)
+	}
+
+	return node, nil
+}
+
+func init() {
+	RegisterTag("set", tagSetParser)
+}

vendor/github.com/flosch/pongo2/tags_spaceless.go

@@ -0,0 +1,54 @@
+package pongo2
+
+import (
+	"bytes"
+	"regexp"
+)
+
+type tagSpacelessNode struct {
+	wrapper *NodeWrapper
+}
+
+var tagSpacelessRegexp = regexp.MustCompile(`(?U:(<.*>))([\t\n\v\f\r ]+)(?U:(<.*>))`)
+
+func (node *tagSpacelessNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	b := bytes.NewBuffer(make([]byte, 0, 1024)) // 1 KiB
+
+	err := node.wrapper.Execute(ctx, b)
+	if err != nil {
+		return err
+	}
+
+	s := b.String()
+	// Repeat this recursively
+	changed := true
+	for changed {
+		s2 := tagSpacelessRegexp.ReplaceAllString(s, "$1$3")
+		changed = s != s2
+		s = s2
+	}
+
+	buffer.WriteString(s)
+
+	return nil
+}
+
+func tagSpacelessParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	spaceless_node := &tagSpacelessNode{}
+
+	wrapper, _, err := doc.WrapUntilTag("endspaceless")
+	if err != nil {
+		return nil, err
+	}
+	spaceless_node.wrapper = wrapper
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed spaceless-tag arguments.", nil)
+	}
+
+	return spaceless_node, nil
+}
+
+func init() {
+	RegisterTag("spaceless", tagSpacelessParser)
+}

vendor/github.com/flosch/pongo2/tags_ssi.go

@@ -0,0 +1,69 @@
+package pongo2
+
+import (
+	"bytes"
+	"io/ioutil"
+)
+
+type tagSSINode struct {
+	filename string
+	content  string
+	template *Template
+}
+
+func (node *tagSSINode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	if node.template != nil {
+		// Execute the template within the current context
+		includeCtx := make(Context)
+		includeCtx.Update(ctx.Public)
+		includeCtx.Update(ctx.Private)
+
+		err := node.template.ExecuteWriter(includeCtx, buffer)
+		if err != nil {
+			return err.(*Error)
+		}
+	} else {
+		// Just print out the content
+		buffer.WriteString(node.content)
+	}
+	return nil
+}
+
+func tagSSIParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	ssi_node := &tagSSINode{}
+
+	if file_token := arguments.MatchType(TokenString); file_token != nil {
+		ssi_node.filename = file_token.Val
+
+		if arguments.Match(TokenIdentifier, "parsed") != nil {
+			// parsed
+			temporary_tpl, err := doc.template.set.FromFile(doc.template.set.resolveFilename(doc.template, file_token.Val))
+			if err != nil {
+				return nil, err.(*Error).updateFromTokenIfNeeded(doc.template, file_token)
+			}
+			ssi_node.template = temporary_tpl
+		} else {
+			// plaintext
+			buf, err := ioutil.ReadFile(doc.template.set.resolveFilename(doc.template, file_token.Val))
+			if err != nil {
+				return nil, (&Error{
+					Sender:   "tag:ssi",
+					ErrorMsg: err.Error(),
+				}).updateFromTokenIfNeeded(doc.template, file_token)
+			}
+			ssi_node.content = string(buf)
+		}
+	} else {
+		return nil, arguments.Error("First argument must be a string.", nil)
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed SSI-tag argument.", nil)
+	}
+
+	return ssi_node, nil
+}
+
+func init() {
+	RegisterTag("ssi", tagSSIParser)
+}

vendor/github.com/flosch/pongo2/tags_templatetag.go

@@ -0,0 +1,49 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagTemplateTagNode struct {
+	content string
+}
+
+var templateTagMapping = map[string]string{
+	"openblock":     "{%",
+	"closeblock":    "%}",
+	"openvariable":  "{{",
+	"closevariable": "}}",
+	"openbrace":     "{",
+	"closebrace":    "}",
+	"opencomment":   "{#",
+	"closecomment":  "#}",
+}
+
+func (node *tagTemplateTagNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	buffer.WriteString(node.content)
+	return nil
+}
+
+func tagTemplateTagParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	tt_node := &tagTemplateTagNode{}
+
+	if arg_token := arguments.MatchType(TokenIdentifier); arg_token != nil {
+		output, found := templateTagMapping[arg_token.Val]
+		if !found {
+			return nil, arguments.Error("Argument not found", arg_token)
+		}
+		tt_node.content = output
+	} else {
+		return nil, arguments.Error("Identifier expected.", nil)
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed templatetag-tag argument.", nil)
+	}
+
+	return tt_node, nil
+}
+
+func init() {
+	RegisterTag("templatetag", tagTemplateTagParser)
+}

vendor/github.com/flosch/pongo2/tags_widthratio.go

@@ -0,0 +1,84 @@
+package pongo2
+
+import (
+	"bytes"
+	"fmt"
+	"math"
+)
+
+type tagWidthratioNode struct {
+	position     *Token
+	current, max IEvaluator
+	width        IEvaluator
+	ctx_name     string
+}
+
+func (node *tagWidthratioNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	current, err := node.current.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+
+	max, err := node.max.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+
+	width, err := node.width.Evaluate(ctx)
+	if err != nil {
+		return err
+	}
+
+	value := int(math.Ceil(current.Float()/max.Float()*width.Float() + 0.5))
+
+	if node.ctx_name == "" {
+		buffer.WriteString(fmt.Sprintf("%d", value))
+	} else {
+		ctx.Private[node.ctx_name] = value
+	}
+
+	return nil
+}
+
+func tagWidthratioParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	widthratio_node := &tagWidthratioNode{
+		position: start,
+	}
+
+	current, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	widthratio_node.current = current
+
+	max, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	widthratio_node.max = max
+
+	width, err := arguments.ParseExpression()
+	if err != nil {
+		return nil, err
+	}
+	widthratio_node.width = width
+
+	if arguments.MatchOne(TokenKeyword, "as") != nil {
+		// Name follows
+		name_token := arguments.MatchType(TokenIdentifier)
+		if name_token == nil {
+			return nil, arguments.Error("Expected name (identifier).", nil)
+		}
+		widthratio_node.ctx_name = name_token.Val
+	}
+
+	if arguments.Remaining() > 0 {
+		return nil, arguments.Error("Malformed widthratio-tag arguments.", nil)
+	}
+
+	return widthratio_node, nil
+}
+
+func init() {
+	RegisterTag("widthratio", tagWidthratioParser)
+}

vendor/github.com/flosch/pongo2/tags_with.go

@@ -0,0 +1,92 @@
+package pongo2
+
+import (
+	"bytes"
+)
+
+type tagWithNode struct {
+	with_pairs map[string]IEvaluator
+	wrapper    *NodeWrapper
+}
+
+func (node *tagWithNode) Execute(ctx *ExecutionContext, buffer *bytes.Buffer) *Error {
+	//new context for block
+	withctx := NewChildExecutionContext(ctx)
+
+	// Put all custom with-pairs into the context
+	for key, value := range node.with_pairs {
+		val, err := value.Evaluate(ctx)
+		if err != nil {
+			return err
+		}
+		withctx.Private[key] = val
+	}
+
+	return node.wrapper.Execute(withctx, buffer)
+}
+
+func tagWithParser(doc *Parser, start *Token, arguments *Parser) (INodeTag, *Error) {
+	with_node := &tagWithNode{
+		with_pairs: make(map[string]IEvaluator),
+	}
+
+	if arguments.Count() == 0 {
+		return nil, arguments.Error("Tag 'with' requires at least one argument.", nil)
+	}
+
+	wrapper, endargs, err := doc.WrapUntilTag("endwith")
+	if err != nil {
+		return nil, err
+	}
+	with_node.wrapper = wrapper
+
+	if endargs.Count() > 0 {
+		return nil, endargs.Error("Arguments not allowed here.", nil)
+	}
+
+	// Scan through all arguments to see which style the user uses (old or new style).
+	// If we find any "as" keyword we will enforce old style; otherwise we will use new style.
+	old_style := false // by default we're using the new_style
+	for i := 0; i < arguments.Count(); i++ {
+		if arguments.PeekN(i, TokenKeyword, "as") != nil {
+			old_style = true
+			break
+		}
+	}
+
+	for arguments.Remaining() > 0 {
+		if old_style {
+			value_expr, err := arguments.ParseExpression()
+			if err != nil {
+				return nil, err
+			}
+			if arguments.Match(TokenKeyword, "as") == nil {
+				return nil, arguments.Error("Expected 'as' keyword.", nil)
+			}
+			key_token := arguments.MatchType(TokenIdentifier)
+			if key_token == nil {
+				return nil, arguments.Error("Expected an identifier", nil)
+			}
+			with_node.with_pairs[key_token.Val] = value_expr
+		} else {
+			key_token := arguments.MatchType(TokenIdentifier)
+			if key_token == nil {
+				return nil, arguments.Error("Expected an identifier", nil)
+			}
+			if arguments.Match(TokenSymbol, "=") == nil {
+				return nil, arguments.Error("Expected '='.", nil)
+			}
+			value_expr, err := arguments.ParseExpression()
+			if err != nil {
+				return nil, err
+			}
+			with_node.with_pairs[key_token.Val] = value_expr
+		}
+	}
+
+	return with_node, nil
+}
+
+func init() {
+	RegisterTag("with", tagWithParser)
+}

vendor/github.com/flosch/pongo2/template.go

@@ -0,0 +1,164 @@
+package pongo2
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+)
+
+type Template struct {
+	set *TemplateSet
+
+	// Input
+	is_tpl_string bool
+	name          string
+	tpl           string
+	size          int
+
+	// Calculation
+	tokens []*Token
+	parser *Parser
+
+	// first come, first serve (it's important to not override existing entries in here)
+	level           int
+	parent          *Template
+	child           *Template
+	blocks          map[string]*NodeWrapper
+	exported_macros map[string]*tagMacroNode
+
+	// Output
+	root *nodeDocument
+}
+
+func newTemplateString(set *TemplateSet, tpl string) (*Template, error) {
+	return newTemplate(set, "<string>", true, tpl)
+}
+
+func newTemplate(set *TemplateSet, name string, is_tpl_string bool, tpl string) (*Template, error) {
+	// Create the template
+	t := &Template{
+		set:             set,
+		is_tpl_string:   is_tpl_string,
+		name:            name,
+		tpl:             tpl,
+		size:            len(tpl),
+		blocks:          make(map[string]*NodeWrapper),
+		exported_macros: make(map[string]*tagMacroNode),
+	}
+
+	// Tokenize it
+	tokens, err := lex(name, tpl)
+	if err != nil {
+		return nil, err
+	}
+	t.tokens = tokens
+
+	// For debugging purposes, show all tokens:
+	/*for i, t := range tokens {
+		fmt.Printf("%3d. %s\n", i, t)
+	}*/
+
+	// Parse it
+	err = t.parse()
+	if err != nil {
+		return nil, err
+	}
+
+	return t, nil
+}
+
+func (tpl *Template) execute(context Context) (*bytes.Buffer, error) {
+	// Create output buffer
+	// We assume that the rendered template will be 30% larger
+	buffer := bytes.NewBuffer(make([]byte, 0, int(float64(tpl.size)*1.3)))
+
+	// Determine the parent to be executed (for template inheritance)
+	parent := tpl
+	for parent.parent != nil {
+		parent = parent.parent
+	}
+
+	// Create context if none is given
+	newContext := make(Context)
+	newContext.Update(tpl.set.Globals)
+
+	if context != nil {
+		newContext.Update(context)
+
+		if len(newContext) > 0 {
+			// Check for context name syntax
+			err := newContext.checkForValidIdentifiers()
+			if err != nil {
+				return nil, err
+			}
+
+			// Check for clashes with macro names
+			for k, _ := range newContext {
+				_, has := tpl.exported_macros[k]
+				if has {
+					return nil, &Error{
+						Filename: tpl.name,
+						Sender:   "execution",
+						ErrorMsg: fmt.Sprintf("Context key name '%s' clashes with macro '%s'.", k, k),
+					}
+				}
+			}
+		}
+	}
+
+	// Create operational context
+	ctx := newExecutionContext(parent, newContext)
+
+	// Run the selected document
+	err := parent.root.Execute(ctx, buffer)
+	if err != nil {
+		return nil, err
+	}
+	return buffer, nil
+}
+
+// Executes the template with the given context and writes to writer (io.Writer)
+// on success. Context can be nil. Nothing is written on error; instead the error
+// is being returned.
+func (tpl *Template) ExecuteWriter(context Context, writer io.Writer) error {
+	buffer, err := tpl.execute(context)
+	if err != nil {
+		return err
+	}
+
+	l := buffer.Len()
+	n, werr := buffer.WriteTo(writer)
+	if int(n) != l {
+		panic(fmt.Sprintf("error on writing template: n(%d) != buffer.Len(%d)", n, l))
+	}
+	if werr != nil {
+		return &Error{
+			Filename: tpl.name,
+			Sender:   "execution",
+			ErrorMsg: werr.Error(),
+		}
+	}
+	return nil
+}
+
+// Executes the template and returns the rendered template as a []byte
+func (tpl *Template) ExecuteBytes(context Context) ([]byte, error) {
+	// Execute template
+	buffer, err := tpl.execute(context)
+	if err != nil {
+		return nil, err
+	}
+	return buffer.Bytes(), nil
+}
+
+// Executes the template and returns the rendered template as a string
+func (tpl *Template) Execute(context Context) (string, error) {
+	// Execute template
+	buffer, err := tpl.execute(context)
+	if err != nil {
+		return "", err
+	}
+
+	return buffer.String(), nil
+
+}

vendor/github.com/flosch/pongo2/template_sets.go

@@ -0,0 +1,296 @@
+package pongo2
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"sync"
+)
+
+// A template set allows you to create your own group of templates with their own global context (which is shared
+// among all members of the set), their own configuration (like a specific base directory) and their own sandbox.
+// It's useful for a separation of different kind of templates (e. g. web templates vs. mail templates).
+type TemplateSet struct {
+	name string
+
+	// Globals will be provided to all templates created within this template set
+	Globals Context
+
+	// If debug is true (default false), ExecutionContext.Logf() will work and output to STDOUT. Furthermore,
+	// FromCache() won't cache the templates. Make sure to synchronize the access to it in case you're changing this
+	// variable during program execution (and template compilation/execution).
+	Debug bool
+
+	// Base directory: If you set the base directory (string is non-empty), all filename lookups in tags/filters are
+	// relative to this directory. If it's empty, all lookups are relative to the current filename which is importing.
+	baseDirectory string
+
+	// Sandbox features
+	// - Limit access to directories (using SandboxDirectories)
+	// - Disallow access to specific tags and/or filters (using BanTag() and BanFilter())
+	//
+	// You can limit file accesses (for all tags/filters which are using pongo2's file resolver technique)
+	// to these sandbox directories. All default pongo2 filters/tags are respecting these restrictions.
+	// For example, if you only have your base directory in the list, a {% ssi "/etc/passwd" %} will not work.
+	// No items in SandboxDirectories means no restrictions at all.
+	//
+	// For efficiency reasons you can ban tags/filters only *before* you have added your first
+	// template to the set (restrictions are statically checked). After you added one, it's not possible anymore
+	// (for your personal security).
+	//
+	// SandboxDirectories can be changed at runtime. Please synchronize the access to it if you need to change it
+	// after you've added your first template to the set. You *must* use this match pattern for your directories:
+	// http://golang.org/pkg/path/filepath/#Match
+	SandboxDirectories   []string
+	firstTemplateCreated bool
+	bannedTags           map[string]bool
+	bannedFilters        map[string]bool
+
+	// Template cache (for FromCache())
+	templateCache      map[string]*Template
+	templateCacheMutex sync.Mutex
+}
+
+// Create your own template sets to separate different kind of templates (e. g. web from mail templates) with
+// different globals or other configurations (like base directories).
+func NewSet(name string) *TemplateSet {
+	return &TemplateSet{
+		name:          name,
+		Globals:       make(Context),
+		bannedTags:    make(map[string]bool),
+		bannedFilters: make(map[string]bool),
+		templateCache: make(map[string]*Template),
+	}
+}
+
+// Use this function to set your template set's base directory. This directory will be used for any relative
+// path in filters, tags and From*-functions to determine your template.
+func (set *TemplateSet) SetBaseDirectory(name string) error {
+	// Make the path absolute
+	if !filepath.IsAbs(name) {
+		abs, err := filepath.Abs(name)
+		if err != nil {
+			return err
+		}
+		name = abs
+	}
+
+	// Check for existence
+	fi, err := os.Stat(name)
+	if err != nil {
+		return err
+	}
+	if !fi.IsDir() {
+		return fmt.Errorf("The given path '%s' is not a directory.")
+	}
+
+	set.baseDirectory = name
+	return nil
+}
+
+func (set *TemplateSet) BaseDirectory() string {
+	return set.baseDirectory
+}
+
+// Ban a specific tag for this template set. See more in the documentation for TemplateSet.
+func (set *TemplateSet) BanTag(name string) {
+	_, has := tags[name]
+	if !has {
+		panic(fmt.Sprintf("Tag '%s' not found.", name))
+	}
+	if set.firstTemplateCreated {
+		panic("You cannot ban any tags after you've added your first template to your template set.")
+	}
+	_, has = set.bannedTags[name]
+	if has {
+		panic(fmt.Sprintf("Tag '%s' is already banned.", name))
+	}
+	set.bannedTags[name] = true
+}
+
+// Ban a specific filter for this template set. See more in the documentation for TemplateSet.
+func (set *TemplateSet) BanFilter(name string) {
+	_, has := filters[name]
+	if !has {
+		panic(fmt.Sprintf("Filter '%s' not found.", name))
+	}
+	if set.firstTemplateCreated {
+		panic("You cannot ban any filters after you've added your first template to your template set.")
+	}
+	_, has = set.bannedFilters[name]
+	if has {
+		panic(fmt.Sprintf("Filter '%s' is already banned.", name))
+	}
+	set.bannedFilters[name] = true
+}
+
+// FromCache() is a convenient method to cache templates. It is thread-safe
+// and will only compile the template associated with a filename once.
+// If TemplateSet.Debug is true (for example during development phase),
+// FromCache() will not cache the template and instead recompile it on any
+// call (to make changes to a template live instantaneously).
+// Like FromFile(), FromCache() takes a relative path to a set base directory.
+// Sandbox restrictions apply (if given).
+func (set *TemplateSet) FromCache(filename string) (*Template, error) {
+	if set.Debug {
+		// Recompile on any request
+		return set.FromFile(filename)
+	} else {
+		// Cache the template
+		cleaned_filename := set.resolveFilename(nil, filename)
+
+		set.templateCacheMutex.Lock()
+		defer set.templateCacheMutex.Unlock()
+
+		tpl, has := set.templateCache[cleaned_filename]
+
+		// Cache miss
+		if !has {
+			tpl, err := set.FromFile(cleaned_filename)
+			if err != nil {
+				return nil, err
+			}
+			set.templateCache[cleaned_filename] = tpl
+			return tpl, nil
+		}
+
+		// Cache hit
+		return tpl, nil
+	}
+}
+
+// Loads  a template from string and returns a Template instance.
+func (set *TemplateSet) FromString(tpl string) (*Template, error) {
+	set.firstTemplateCreated = true
+
+	return newTemplateString(set, tpl)
+}
+
+// Loads a template from a filename and returns a Template instance.
+// If a base directory is set, the filename must be either relative to it
+// or be an absolute path. Sandbox restrictions (SandboxDirectories) apply
+// if given.
+func (set *TemplateSet) FromFile(filename string) (*Template, error) {
+	set.firstTemplateCreated = true
+
+	buf, err := ioutil.ReadFile(set.resolveFilename(nil, filename))
+	if err != nil {
+		return nil, &Error{
+			Filename: filename,
+			Sender:   "fromfile",
+			ErrorMsg: err.Error(),
+		}
+	}
+	return newTemplate(set, filename, false, string(buf))
+}
+
+// Shortcut; renders a template string directly. Panics when providing a
+// malformed template or an error occurs during execution.
+func (set *TemplateSet) RenderTemplateString(s string, ctx Context) string {
+	set.firstTemplateCreated = true
+
+	tpl := Must(set.FromString(s))
+	result, err := tpl.Execute(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return result
+}
+
+// Shortcut; renders a template file directly. Panics when providing a
+// malformed template or an error occurs during execution.
+func (set *TemplateSet) RenderTemplateFile(fn string, ctx Context) string {
+	set.firstTemplateCreated = true
+
+	tpl := Must(set.FromFile(fn))
+	result, err := tpl.Execute(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return result
+}
+
+func (set *TemplateSet) logf(format string, args ...interface{}) {
+	if set.Debug {
+		logger.Printf(fmt.Sprintf("[template set: %s] %s", set.name, format), args...)
+	}
+}
+
+// Resolves a filename relative to the base directory. Absolute paths are allowed.
+// If sandbox restrictions are given (SandboxDirectories), they will be respected and checked.
+// On sandbox restriction violation, resolveFilename() panics.
+func (set *TemplateSet) resolveFilename(tpl *Template, filename string) (resolved_path string) {
+	if len(set.SandboxDirectories) > 0 {
+		defer func() {
+			// Remove any ".." or other crap
+			resolved_path = filepath.Clean(resolved_path)
+
+			// Make the path absolute
+			abs_path, err := filepath.Abs(resolved_path)
+			if err != nil {
+				panic(err)
+			}
+			resolved_path = abs_path
+
+			// Check against the sandbox directories (once one pattern matches, we're done and can allow it)
+			for _, pattern := range set.SandboxDirectories {
+				matched, err := filepath.Match(pattern, resolved_path)
+				if err != nil {
+					panic("Wrong sandbox directory match pattern (see http://golang.org/pkg/path/filepath/#Match).")
+				}
+				if matched {
+					// OK!
+					return
+				}
+			}
+
+			// No pattern matched, we have to log+deny the request
+			set.logf("Access attempt outside of the sandbox directories (blocked): '%s'", resolved_path)
+			resolved_path = ""
+		}()
+	}
+
+	if filepath.IsAbs(filename) {
+		return filename
+	}
+
+	if set.baseDirectory == "" {
+		if tpl != nil {
+			if tpl.is_tpl_string {
+				return filename
+			}
+			base := filepath.Dir(tpl.name)
+			return filepath.Join(base, filename)
+		}
+		return filename
+	} else {
+		return filepath.Join(set.baseDirectory, filename)
+	}
+}
+
+// Logging function (internally used)
+func logf(format string, items ...interface{}) {
+	if debug {
+		logger.Printf(format, items...)
+	}
+}
+
+var (
+	debug  bool // internal debugging
+	logger = log.New(os.Stdout, "[pongo2] ", log.LstdFlags)
+
+	// Creating a default set
+	DefaultSet = NewSet("default")
+
+	// Methods on the default set
+	FromString           = DefaultSet.FromString
+	FromFile             = DefaultSet.FromFile
+	FromCache            = DefaultSet.FromCache
+	RenderTemplateString = DefaultSet.RenderTemplateString
+	RenderTemplateFile   = DefaultSet.RenderTemplateFile
+
+	// Globals for the default set
+	Globals = DefaultSet.Globals
+)

vendor/github.com/flosch/pongo2/template_tests/autoescape.tpl

@@ -0,0 +1,10 @@
+{{ "<script>alert('xss');</script>" }}
+{% autoescape off %}
+{{ "<script>alert('xss');</script>" }}
+{% endautoescape %}
+{% autoescape on %}
+{{ "<script>alert('xss');</script>" }}
+{% endautoescape %}
+{% autoescape off %}
+{{ "<script>alert('xss');</script>"|escape }}
+{% endautoescape %}

vendor/github.com/flosch/pongo2/template_tests/autoescape.tpl.out

@@ -0,0 +1,9 @@
+<script>alert('xss');</script>
+
+<script>alert('xss');</script>
+
+
+&lt;script&gt;alert(&#39;xss&#39;);&lt;/script&gt;
+
+
+&lt;script&gt;alert(&#39;xss&#39;);&lt;/script&gt;

vendor/github.com/flosch/pongo2/template_tests/base_dir_test/base.html

@@ -0,0 +1 @@
+Hello from {{ base_directory }}

vendor/github.com/flosch/pongo2/template_tests/base_dir_test/subdir/include.html

@@ -0,0 +1 @@
+{% include "base.html" %}

vendor/github.com/flosch/pongo2/template_tests/base_dir_test/subdir/index.html

@@ -0,0 +1 @@
+{% extends "base.html" %}

vendor/github.com/flosch/pongo2/template_tests/base_dir_test/subdir/ssi.html

@@ -0,0 +1 @@
+{% ssi "base.html" parsed %}

vendor/github.com/flosch/pongo2/template_tests/complex.tpl

@@ -0,0 +1,32 @@
+{# A more complex template using pongo2 (fully django-compatible template) #}
+<!DOCTYPE html>
+<html>
+
+<head>
+	<title>My blog page</title>
+</head>
+
+<body>
+	<h1>Blogpost</h1>
+	<div id="content">
+		{{ complex.post.Text|safe }}
+	</div>
+
+	<h1>Comments</h1>
+
+	{% for comment in complex.comments %}
+		<h2>{{ forloop.Counter }}. Comment ({{ forloop.Revcounter}} comment{{ forloop.Revcounter|pluralize:"s" }} left)</h2>
+		<p>From: {{ comment.Author.Name }} ({{ comment.Author.Validated|yesno:"validated,not validated,unknown validation status" }})</p>
+
+		{% if complex.is_admin(comment.Author) %}
+			<p>This user is an admin (verify: {{ comment.Author.Is_admin }})!</p>
+		{% else %}
+			<p>This user is not admin!</p>
+		{% endif %}
+
+		<p>Written {{ comment.Date }}</p>
+		<p>{{ comment.Text|striptags }}</p>
+	{% endfor %}
+</body>
+
+</html>

vendor/github.com/flosch/pongo2/template_tests/complex.tpl.out

@@ -0,0 +1,50 @@
+
+<!DOCTYPE html>
+<html>
+
+<head>
+	<title>My blog page</title>
+</head>
+
+<body>
+	<h1>Blogpost</h1>
+	<div id="content">
+		<h2>Hello!</h2><p>Welcome to my new blog page. I'm using pongo2 which supports {{ variables }} and {% tags %}.</p>
+	</div>
+
+	<h1>Comments</h1>
+
+	
+		<h2>1. Comment (3 comments left)</h2>
+		<p>From: user1 (validated)</p>
+
+		
+			<p>This user is not admin!</p>
+		
+
+		<p>Written 2014-06-10 15:30:15 +0000 UTC</p>
+		<p>&quot;pongo2 is nice!&quot;</p>
+	
+		<h2>2. Comment (2 comments left)</h2>
+		<p>From: user2 (validated)</p>
+
+		
+			<p>This user is an admin (verify: True)!</p>
+		
+
+		<p>Written 2011-03-21 08:37:56.000000012 +0000 UTC</p>
+		<p>comment2 with unsafe tags in it</p>
+	
+		<h2>3. Comment (1 comment left)</h2>
+		<p>From: user3 (not validated)</p>
+
+		
+			<p>This user is not admin!</p>
+		
+
+		<p>Written 2014-06-10 15:30:15 +0000 UTC</p>
+		<p>hello! there</p>
+	
+</body>
+
+</html>

vendor/github.com/flosch/pongo2/template_tests/cycle.tpl

@@ -0,0 +1,22 @@
+{% for item in simple.multiple_item_list %}
+    '{% cycle "item1" simple.name simple.number %}'
+{% endfor %}
+{% for item in simple.multiple_item_list %}
+    '{% cycle "item1" simple.name simple.number as cycleitem %}'
+    May I present the cycle item again: '{{ cycleitem }}'
+{% endfor %}
+{% for item in simple.multiple_item_list %}
+    '{% cycle "item1" simple.name simple.number as cycleitem silent %}'
+    May I present the cycle item: '{{ cycleitem }}'
+{% endfor %}
+{% for item in simple.multiple_item_list %}
+    '{% cycle "item1" simple.name simple.number as cycleitem silent %}'
+    May I present the cycle item: '{{ cycleitem }}'
+    {% include "inheritance/cycle_include.tpl" %}
+{% endfor %}
+'{% cycle "item1" simple.name simple.number as cycleitem %}'
+'{% cycle cycleitem %}'
+'{% cycle "item1" simple.name simple.number as cycleitem silent %}'
+'{{ cycleitem }}'
+'{% cycle cycleitem %}'
+'{{ cycleitem }}'

vendor/github.com/flosch/pongo2/template_tests/cycle.tpl.out

@@ -0,0 +1,130 @@
+
+    'item1'
+
+    'john doe'
+
+    '42'
+
+    'item1'
+
+    'john doe'
+
+    '42'
+
+    'item1'
+
+    'john doe'
+
+    '42'
+
+    'item1'
+
+
+    'item1'
+    May I present the cycle item again: 'item1'
+
+    'john doe'
+    May I present the cycle item again: 'john doe'
+
+    '42'
+    May I present the cycle item again: '42'
+
+    'item1'
+    May I present the cycle item again: 'item1'
+
+    'john doe'
+    May I present the cycle item again: 'john doe'
+
+    '42'
+    May I present the cycle item again: '42'
+
+    'item1'
+    May I present the cycle item again: 'item1'
+
+    'john doe'
+    May I present the cycle item again: 'john doe'
+
+    '42'
+    May I present the cycle item again: '42'
+
+    'item1'
+    May I present the cycle item again: 'item1'
+
+
+    ''
+    May I present the cycle item: 'item1'
+
+    ''
+    May I present the cycle item: 'john doe'
+
+    ''
+    May I present the cycle item: '42'
+
+    ''
+    May I present the cycle item: 'item1'
+
+    ''
+    May I present the cycle item: 'john doe'
+
+    ''
+    May I present the cycle item: '42'
+
+    ''
+    May I present the cycle item: 'item1'
+
+    ''
+    May I present the cycle item: 'john doe'
+
+    ''
+    May I present the cycle item: '42'
+
+    ''
+    May I present the cycle item: 'item1'
+
+
+    ''
+    May I present the cycle item: 'item1'
+    Included 'item1'.
+
+    ''
+    May I present the cycle item: 'john doe'
+    Included 'john doe'.
+
+    ''
+    May I present the cycle item: '42'
+    Included '42'.
+
+    ''
+    May I present the cycle item: 'item1'
+    Included 'item1'.
+
+    ''
+    May I present the cycle item: 'john doe'
+    Included 'john doe'.
+
+    ''
+    May I present the cycle item: '42'
+    Included '42'.
+
+    ''
+    May I present the cycle item: 'item1'
+    Included 'item1'.
+
+    ''
+    May I present the cycle item: 'john doe'
+    Included 'john doe'.
+
+    ''
+    May I present the cycle item: '42'
+    Included '42'.
+
+    ''
+    May I present the cycle item: 'item1'
+    Included 'item1'.
+
+'item1'
+'john doe'
+''
+'item1'
+''
+'john doe'

vendor/github.com/flosch/pongo2/template_tests/expressions.tpl

@@ -0,0 +1,53 @@
+integers and complex expressions
+{{ 10-100 }}
+{{ -(10-100) }}
+{{ -(-(10-100)) }}
+{{ -1 * (-(-(10-100))) }}
+{{ -1 * (-(-(10-100)) ^ 2) ^ 3 + 3 * (5 - 17) + 1 + 2 }}
+
+floats
+{{ 5.5 }}
+{{ 5.172841 }}
+{{ 5.5 - 1.5 == 4 }}
+{{ 5.5 - 1.5 == 4.0 }}
+
+mul/div
+{{ 2 * 5 }}
+{{ 2 * 5.0 }}
+{{ 2 * 0 }}
+{{ 2.5 * 5.3 }}
+{{ 1/2 }}
+{{ 1/2.0 }}
+{{ 1/0.000001 }}
+
+logic expressions
+{{ !true }}
+{{ !(true || false) }}
+{{ true || false }}
+{{ true or false }}
+{{ false or false }}
+{{ false || false }}
+{{ true && (true && (true && (true && (1 == 1 || false)))) }}
+
+float comparison
+{{ 5.5 <= 5.5 }}
+{{ 5.5 < 5.5 }}
+{{ 5.5 > 5.5 }}
+{{ 5.5 >= 5.5 }}
+
+remainders
+{{ (simple.number+7)%7 }}
+{{ (simple.number+7)%7 == 0 }}
+{{ (simple.number+7)%6 }}
+
+in/not in
+{{ 5 in simple.intmap }}
+{{ 2 in simple.intmap }}
+{{ 7 in simple.intmap }}
+{{ !(5 in simple.intmap) }}
+{{ not(7 in simple.intmap) }}
+
+issue #48 (associativity for infix operators)
+{{ 34/3*3 }}
+{{ 10 + 24 / 6 / 2 }}
+{{ 6 - 4 - 2 }}

vendor/github.com/flosch/pongo2/template_tests/expressions.tpl.out

@@ -0,0 +1,53 @@
+integers and complex expressions
+-90
+90
+-90
+90
+531440999967.000000
+
+floats
+5.500000
+5.172841
+False
+True
+
+mul/div
+10
+10.000000
+0
+13.250000
+0
+0.500000
+1000000.000000
+
+logic expressions
+False
+False
+True
+True
+False
+False
+True
+
+float comparison
+True
+False
+False
+True
+
+remainders
+0
+True
+1
+
+in/not in
+True
+True
+False
+False
+True
+
+issue #48 (associativity for infix operators)
+33
+12
+0

vendor/github.com/flosch/pongo2/template_tests/extends.tpl

@@ -0,0 +1,3 @@
+{% extends "inheritance/base.tpl" %}
+
+{% block content %}Extends' content{% endblock %}

vendor/github.com/flosch/pongo2/template_tests/extends.tpl.out

@@ -0,0 +1 @@
+Start#This is base's bodyExtends' content#End

vendor/github.com/flosch/pongo2/template_tests/filters-compilation.err

@@ -0,0 +1,5 @@
+{{ }}
+{{ (1 - 1 }}
+{{ 1|float: }}
+{{ "test"|non_existent_filter }}
+{{ "test"|"test" }}

vendor/github.com/flosch/pongo2/template_tests/filters-compilation.err.out

@@ -0,0 +1,5 @@
+.*Expected either a number, string, keyword or identifier\.
+.*Closing bracket expected after expression
+.*Filter parameter required after ':'.*
+.*Filter 'non_existent_filter' does not exist\.
+.*Filter name must be an identifier\.

vendor/github.com/flosch/pongo2/template_tests/filters-execution.err

@@ -0,0 +1,3 @@
+{{ -(true || false) }}
+{{ simple.func_add("test", 5) }}
+{{ simple.func_variadic_sum_int("foo") }}

vendor/github.com/flosch/pongo2/template_tests/filters-execution.err.out

@@ -0,0 +1,3 @@
+.*where: execution.*Negative sign on a non\-number expression
+.*Function input argument 0 of 'simple.func_add' must be of type int or \*pongo2.Value \(not string\).
+.*Function variadic input argument of 'simple.func_variadic_sum_int' must be of type int or \*pongo2.Value \(not string\).

vendor/github.com/flosch/pongo2/template_tests/filters.tpl

@@ -0,0 +1,304 @@
+add
+{{ 5|add:2 }}
+{{ 5|add:simple.number }}
+{{ 5|add:nothing }}
+{{ 5|add:"test" }}
+{{ "hello "|add:"john doe" }}
+{{ "hello "|add:simple.name }}
+
+addslashes
+{{ "plain text"|addslashes|safe }}
+{{ simple.escape_text|addslashes|safe }}
+
+capfirst
+{{ ""|capfirst }}
+{{ 5|capfirst }}
+{{ "h"|capfirst }}
+{{ "hello there!"|capfirst }}
+{{ simple.chinese_hello_world|capfirst }}
+
+cut
+{{ 15|cut:"5" }}
+{{ "Hello world"|cut: " " }}
+
+default
+{{ simple.nothing|default:"n/a" }}
+{{ nothing|default:simple.number }}
+{{ simple.number|default:"n/a" }}
+{{ 5|default:"n/a" }}
+
+default_if_none
+{{ simple.nothing|default_if_none:"n/a" }}
+{{ ""|default_if_none:"n/a" }}
+{{ nil|default_if_none:"n/a" }}
+
+get_digit
+{{ 1234567890|get_digit:0 }}
+{{ 1234567890|get_digit }}
+{{ 1234567890|get_digit:2 }}
+{{ 1234567890|get_digit:"4" }}
+{{ 1234567890|get_digit:10 }}
+{{ 1234567890|get_digit:15 }}
+
+safe
+{{ "<script>" }}
+{{ "<script>"|safe }}
+
+escape
+{{ "<script>"|safe|escape }}
+
+title
+{{ ""|title }}
+{{ 5|title }}
+{{ "h"|title }}
+{{ "hello there!"|title }}
+{{ "HELLO THERE!"|title }}
+{{ "hELLO tHERE!"|title }}
+{{ simple.chinese_hello_world|title }}
+
+truncatechars
+{{ "Joel is a slug"|truncatechars:9 }}
+{{ "Joel is a slug"|truncatechars:13 }}
+{{ "Joel is a slug"|truncatechars:14 }}
+{{ simple.chinese_hello_world|truncatechars:1 }}
+{{ simple.chinese_hello_world|truncatechars:2 }}
+
+divisibleby
+{{ 21|divisibleby:3 }}
+{{ 21|divisibleby:"3" }}
+{{ 21|float|divisibleby:"3" }}
+{{ 22|divisibleby:"3" }}
+{{ 85|divisibleby:simple.number }}
+{{ 84|divisibleby:simple.number }}
+
+striptags
+{{ "<strong><i>Hello!</i></strong>"|striptags|safe }}
+
+removetags
+{{ "<strong><i>Hello!</i></strong>"|removetags:"i"|safe }}
+
+yesno
+{{ simple.bool_true|yesno }}
+{{ simple.bool_false|yesno }}
+{{ simple.nil|yesno }}
+{{ simple.nothing|yesno }}
+{{ simple.bool_true|yesno:"ja,nein,vielleicht" }}
+{{ simple.bool_false|yesno:"ja,nein,vielleicht" }}
+{{ simple.nothing|yesno:"ja,nein" }}
+
+pluralize
+customer{{ 0|pluralize }}
+customer{{ 1|pluralize }}
+customer{{ 2|pluralize }}
+cherr{{ 0|pluralize:"y,ies" }}
+cherr{{ 1|pluralize:"y,ies" }}
+cherr{{ 2|pluralize:"y,ies" }}
+walrus{{ 0|pluralize:"es" }}
+walrus{{ 1|pluralize:"es" }}
+walrus{{ simple.number|pluralize:"es" }}
+
+random
+{{ 5|random }}
+{{ ""|random }}
+{{ "h"|random }}
+{{ simple.one_item_list|random }}
+
+first
+{{ "Test"|first }}
+{{ complex.comments|first }}
+{{ 5|first }}
+{{ true|first }}
+{{ nothing|first }}
+{{ simple.chinese_hello_world|first }}
+
+last
+{{ "Test"|last }}
+{{ complex.comments|last }}
+{{ 5|last }}
+{{ true|last }}
+{{ nothing|last }}
+{{ simple.chinese_hello_world|last }}
+
+urlencode
+{{ "http://www.example.org/foo?a=b&c=d"|urlencode }}
+
+linebreaksbr
+{{ simple.newline_text|linebreaksbr }}
+{{ ""|linebreaksbr }}
+{{ "hallo"|linebreaksbr }}
+
+length_is
+{{ simple.name|length_is:8 }}
+{{ simple.name|length_is:10 }}
+{{ simple.name|length_is:"8" }}
+{{ simple.name|length_is:"10" }}
+{{ 5|length_is:1 }}
+{{ simple.chinese_hello_world|length_is:4 }}
+{{ simple.chinese_hello_world|length_is:3 }}
+{{ simple.chinese_hello_world|length_is:5 }}
+
+integer
+{{ "foobar"|integer }}
+{{ nothing|integer }}
+{{ "5.4"|float|integer }}
+{{ "5.5"|float|integer }}
+{{ "5.6"|float|integer }}
+{{ 6|float|integer }}
+{{ -100|integer }}
+
+float
+{{ "foobar"|float }}
+{{ nil|float }}
+{{ "5.5"|float }}
+{{ 5|float }}
+{{ "5.6"|integer|float }}
+{{ -100|float }}
+{% if 5.5 == 5.500000 %}5.5 is 5.500000{% endif %}
+{% if 5.5 != 5.500001 %}5.5 is not 5.500001{% endif %}
+
+floatformat
+{{ 34.23234|floatformat }}
+{{ 34.00000|floatformat }}
+{{ 34.26000|floatformat }}
+{{ "34.23234"|floatformat }}
+{{ "34.00000"|floatformat }}
+{{ "34.26000"|floatformat }}
+{{ 34.23234|floatformat:3 }}
+{{ 34.00000|floatformat:3 }}
+{{ 34.26000|floatformat:3 }}
+{{ 34.23234|floatformat:"0" }}
+{{ 34.00000|floatformat:"0" }}
+{{ 39.56000|floatformat:"0" }}
+{{ 34.23234|floatformat:"-3" }}
+{{ 34.00000|floatformat:"-3" }}
+{{ 34.26000|floatformat:"-3" }}
+
+join
+{{ simple.misc_list|join:", " }}
+
+stringformat
+{{ simple.float|stringformat:"%.2f" }}
+{{ simple.uint|stringformat:"Test: %d" }}
+{{ simple.chinese_hello_world|stringformat:"Chinese: %s" }}
+
+make_list
+{{ simple.name|make_list|join:", " }}
+{% for char in simple.name|make_list %}{{ char }}{% endfor %}
+
+center
+'{{ "test"|center:3 }}'
+'{{ "test"|center:19 }}'
+'{{ "test"|center:20 }}'
+{{ "test"|center:20|length }}
+'{{ "test2"|center:19 }}'
+'{{ "test2"|center:20 }}'
+{{ "test2"|center:20|length }}
+'{{ simple.chinese_hello_world|center:20 }}'
+
+ljust
+'{{ "test"|ljust:"2" }}'
+'{{ "test"|ljust:"20" }}'
+{{ "test"|ljust:"20"|length }}
+'{{ simple.chinese_hello_world|ljust:10 }}'
+
+rjust
+'{{ "test"|rjust:"2" }}'
+'{{ "test"|rjust:"20" }}'
+{{ "test"|rjust:"20"|length }}
+'{{ simple.chinese_hello_world|rjust:10 }}'
+
+wordcount
+{{ ""|wordcount }}
+{% filter wordcount %}{% lorem 25 w %}{% endfilter %}
+
+wordwrap
+{{ ""|wordwrap:2 }}
+{% filter wordwrap:5 %}{% lorem 26 w %}{% endfilter %}
+
+iriencode
+{{ "?foo=123&bar=yes"|iriencode }}
+
+linebreaks
+{{ ""|linebreaks|safe }}
+{{ simple.newline_text|linebreaks|safe }}
+{{ simple.long_text|linebreaks|safe }}
+{{ simple.name|linebreaks|safe }}
+
+linenumbers
+{% filter linenumbers %}{% lorem 10 %}{% endfilter %}
+
+phone2numeric
+{{ "999-PONGO2"|phone2numeric }}
+
+truncatewords
+{% filter truncatewords:9 %}{% lorem 25 w %}{% endfilter %}
+{% filter wordcount %}{% filter truncatewords:9 %}{% lorem 25 w %}{% endfilter %}{% endfilter %}
+{{ simple.chinese_hello_world|truncatewords:0 }}
+{{ simple.chinese_hello_world|truncatewords:1 }}
+{{ simple.chinese_hello_world|truncatewords:2 }}
+
+urlize
+{{ "http://www.florian-schlachter.de"|urlize|safe }}
+{{ "www.florian-schlachter.de"|urlize|safe }}
+{{ "florian-schlachter.de"|urlize|safe }}
+{% filter urlize:true|safe %}
+Please mail me at demo@example.com or visit mit on:
+- lorem ipsum github.com/flosch/pongo2 lorem ipsum
+- lorem ipsum http://www.florian-schlachter.de lorem ipsum
+- lorem ipsum https://www.florian-schlachter.de lorem ipsum
+- lorem ipsum https://www.florian-schlachter.de lorem ipsum
+- lorem ipsum www.florian-schlachter.de lorem ipsum
+- lorem ipsum www.florian-schlachter.de/test="test" lorem ipsum
+{% endfilter %}
+--
+{% filter urlize:false|safe %}
+Please mail me at demo@example.com or visit mit on:
+- lorem ipsum github.com/flosch/pongo2 lorem ipsum
+- lorem ipsum http://www.florian-schlachter.de lorem ipsum
+- lorem ipsum https://www.florian-schlachter.de lorem ipsum
+- lorem ipsum https://www.florian-schlachter.de lorem ipsum
+- lorem ipsum www.florian-schlachter.de lorem ipsum
+- lorem ipsum www.florian-schlachter.de/test="test" lorem ipsum
+{% endfilter %}
+
+urlizetrunc
+{% filter urlizetrunc:15|safe %}
+Please mail me at demo@example.com or visit mit on:
+- lorem ipsum github.com/flosch/pongo2 lorem ipsum
+- lorem ipsum http://www.florian-schlachter.de lorem ipsum
+- lorem ipsum https://www.florian-schlachter.de lorem ipsum
+- lorem ipsum https://www.florian-schlachter.de lorem ipsum
+- lorem ipsum www.florian-schlachter.de lorem ipsum
+- lorem ipsum www.florian-schlachter.de/test="test" lorem ipsum
+{% endfilter %}
+
+escapejs
+{{ simple.escape_js_test|escapejs|safe }}
+
+slice
+{{ simple.multiple_item_list|slice:":99"|join:"," }}
+{{ simple.multiple_item_list|slice:"99:"|join:"," }}
+{{ simple.multiple_item_list|slice:":3"|join:"," }}
+{{ simple.multiple_item_list|slice:"3:5"|join:"," }}
+{{ simple.multiple_item_list|slice:"2:"|join:"," }}
+{{ simple.multiple_item_list|slice:"2:3"|join:"," }}
+{{ simple.multiple_item_list|slice:"2:1"|join:"," }}
+{{ "Test"|slice:"1:3" }}
+{{ simple.chinese_hello_world|slice:"1:3" }}
+
+truncatechars_html
+{{ "This is a long test which will be cutted after some chars."|truncatechars_html:25 }}
+{{ "<div class=\"foo\"><ul class=\"foo\"><li class=\"foo\"><p class=\"foo\">This is a long test which will be cutted after some chars.</p></li></ul></div>"|truncatechars_html:25 }}
+{{ "<p class='test' id='foo'>This is a long test which will be cutted after some chars.</p>"|truncatechars_html:25 }}
+{{ "<a name='link'><p>This </a>is a long test which will be cutted after some chars.</p>"|truncatechars_html:25 }}
+{{ "<p>This </a>is a long test which will be cutted after some chars.</p>"|truncatechars_html:25 }}
+{{ "<p>This is a long test which will be cutted after some chars.</p>"|truncatechars_html:7 }}
+
+truncatewords_html
+{{ "This is a long test which will be cutted after some words."|truncatewords_html:25|safe }}
+{{ "<div class=\"foo\"><ul class=\"foo\"><li class=\"foo\"><p class=\"foo\">This is a long test which will be cutted after some chars.</p></li></ul></div>"|truncatewords_html:5 }}
+{{ "<p>This. is. a. long test. Test test, test.</p>"|truncatewords_html:8 }}
+{{ "<a name='link' href=\"https://....\"><p class=\"foo\">This </a>is a long test, which will be cutted after some words.</p>"|truncatewords_html:5 }}
+{{ "<p>This </a>is a long test, which will be cutted after some words.</p>"|truncatewords_html:5 }}
+{{ "<p>This is a long test which will be cutted after some words.</p>"|truncatewords_html:2 }}
+{{ "<p>This is a long test which will be cutted after some words.</p>"|truncatewords_html:0 }}

vendor/github.com/flosch/pongo2/template_tests/filters.tpl.out

@@ -0,0 +1,318 @@
+add
+7
+47
+5
+5test
+hello john doe
+hello john doe
+
+addslashes
+plain text
+This is \\a Test. \"Yep\". \'Yep\'.
+
+capfirst
+
+
+H
+Hello there!
+你好世界
+
+cut
+1
+Helloworld
+
+default
+n/a
+42
+42
+5
+
+default_if_none
+n/a
+
+n/a
+
+get_digit
+1234567890
+1234567890
+9
+7
+1
+1234567890
+
+safe
+<script>
+<script>
+
+escape
+&lt;script&gt;
+
+title
+
+
+H
+Hello There!
+Hello There!
+Hello There!
+你好世界
+
+truncatechars
+Joel i...
+Joel is a ...
+Joel is a slug
+你
+你好
+
+divisibleby
+True
+True
+True
+False
+False
+True
+
+striptags
+Hello!
+
+removetags
+<strong>Hello!</strong>
+
+yesno
+yes
+no
+maybe
+maybe
+ja
+nein
+maybe
+
+pluralize
+customers
+customer
+customers
+cherries
+cherry
+cherries
+walruses
+walrus
+walruses
+
+random
+5
+
+h
+99
+
+first
+T
+<pongo2.comment Value>
+
+
+
+你
+
+last
+t
+<pongo2.comment Value>
+
+
+
+界
+
+urlencode
+http%3A%2F%2Fwww.example.org%2Ffoo%3Fa%3Db%26c%3Dd
+
+linebreaksbr
+this is a text&lt;br /&gt;with a new line in it
+
+hallo
+
+length_is
+True
+False
+True
+False
+False
+True
+False
+False
+
+integer
+0
+0
+5
+5
+5
+6
+-100
+
+float
+0.000000
+0.000000
+5.500000
+5.000000
+5.000000
+-100.000000
+5.5 is 5.500000
+5.5 is not 5.500001
+
+floatformat
+34.2
+34
+34.3
+34.2
+34
+34.3
+34.232
+34.000
+34.260
+34
+34
+40
+34.232
+34
+34.260
+
+join
+Hello, 99, 3.140000, good
+
+stringformat
+3.14
+Test: 8
+Chinese: 你好世界
+
+make_list
+j, o, h, n,  , d, o, e
+john doe
+
+center
+'test'
+'        test       '
+'        test        '
+20
+'       test2       '
+'        test2       '
+20
+'        你好世界        '
+
+ljust
+'test'
+'test                '
+20
+'你好世界      '
+
+rjust
+'test'
+'                test'
+20
+'      你好世界'
+
+wordcount
+0
+25
+
+wordwrap
+
+Lorem ipsum dolor sit amet,
+consectetur adipisici elit, sed eiusmod
+tempor incidunt ut labore et
+dolore magna aliqua. Ut enim
+ad minim veniam, quis nostrud
+exercitation
+
+iriencode
+?foo=123&amp;bar=yes
+
+linebreaks
+
+<p>this is a text<br />with a new line in it</p>
+<p>This is a simple text.</p><p>This too, as a paragraph.<br />Right?</p><p>Yep!</p>
+<p>john doe</p>
+
+linenumbers
+1. Lorem ipsum dolor sit amet, consectetur adipisici elit, sed eiusmod tempor incidunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquid ex ea commodi consequat. Quis aute iure reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint obcaecat cupiditat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+2. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.
+3. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.
+4. Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat.
+5. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis.
+6. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, At accusam aliquyam diam diam dolore dolores duo eirmod eos erat, et nonumy sed tempor et et invidunt justo labore Stet clita ea et gubergren, kasd magna no rebum. sanctus sea sed takimata ut vero voluptua. est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.
+7. Consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.
+8. Lorem ipsum dolor sit amet, consectetur adipisici elit, sed eiusmod tempor incidunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquid ex ea commodi consequat. Quis aute iure reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint obcaecat cupiditat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+9. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.
+10. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.
+
+phone2numeric
+999-766462
+
+truncatewords
+Lorem ipsum dolor sit amet, consectetur adipisici elit, sed ...
+10
+
+你好世界
+你好世界
+
+urlize
+<a href="http://www.florian-schlachter.de" rel="nofollow">http://www.florian-schlachter.de</a>
+<a href="http://www.florian-schlachter.de" rel="nofollow">www.florian-schlachter.de</a>
+<a href="http://florian-schlachter.de" rel="nofollow">florian-schlachter.de</a>
+
+Please mail me at <a href="mailto:demo@example.com">demo@example.com</a> or visit mit on:
+- lorem ipsum <a href="http://github.com/flosch/pongo2" rel="nofollow">github.com/flosch/pongo2</a> lorem ipsum
+- lorem ipsum <a href="http://www.florian-schlachter.de" rel="nofollow">http://www.florian-schlachter.de</a> lorem ipsum
+- lorem ipsum <a href="https://www.florian-schlachter.de" rel="nofollow">https://www.florian-schlachter.de</a> lorem ipsum
+- lorem ipsum <a href="https://www.florian-schlachter.de" rel="nofollow">https://www.florian-schlachter.de</a> lorem ipsum
+- lorem ipsum <a href="http://www.florian-schlachter.de" rel="nofollow">www.florian-schlachter.de</a> lorem ipsum
+- lorem ipsum <a href="http://www.florian-schlachter.de/test=%22test%22" rel="nofollow">www.florian-schlachter.de/test=&quot;test&quot;</a> lorem ipsum
+
+--
+
+Please mail me at <a href="mailto:demo@example.com">demo@example.com</a> or visit mit on:
+- lorem ipsum <a href="http://github.com/flosch/pongo2" rel="nofollow">github.com/flosch/pongo2</a> lorem ipsum
+- lorem ipsum <a href="http://www.florian-schlachter.de" rel="nofollow">http://www.florian-schlachter.de</a> lorem ipsum
+- lorem ipsum <a href="https://www.florian-schlachter.de" rel="nofollow">https://www.florian-schlachter.de</a> lorem ipsum
+- lorem ipsum <a href="https://www.florian-schlachter.de" rel="nofollow">https://www.florian-schlachter.de</a> lorem ipsum
+- lorem ipsum <a href="http://www.florian-schlachter.de" rel="nofollow">www.florian-schlachter.de</a> lorem ipsum
+- lorem ipsum <a href="http://www.florian-schlachter.de/test=%22test%22" rel="nofollow">www.florian-schlachter.de/test="test"</a> lorem ipsum
+
+
+urlizetrunc
+
+Please mail me at <a href="mailto:demo@example.com">demo@example...</a> or visit mit on:
+- lorem ipsum <a href="http://github.com/flosch/pongo2" rel="nofollow">github.com/f...</a> lorem ipsum
+- lorem ipsum <a href="http://www.florian-schlachter.de" rel="nofollow">http://www.f...</a> lorem ipsum
+- lorem ipsum <a href="https://www.florian-schlachter.de" rel="nofollow">https://www....</a> lorem ipsum
+- lorem ipsum <a href="https://www.florian-schlachter.de" rel="nofollow">https://www....</a> lorem ipsum
+- lorem ipsum <a href="http://www.florian-schlachter.de" rel="nofollow">www.florian-...</a> lorem ipsum
+- lorem ipsum <a href="http://www.florian-schlachter.de/test=%22test%22" rel="nofollow">www.florian-...</a> lorem ipsum
+
+
+escapejs
+escape sequences \u000D\u000A\u005C\u0027\u005C\u0022 special chars \u0022\u003F\u0021\u003D\u0024\u003C\u003E
+
+slice
+1,1,2,3,5,8,13,21,34,55
+
+1,1,2
+3,5
+2,3,5,8,13,21,34,55
+2
+2,3,5,8,13,21,34,55
+es
+好世
+
+truncatechars_html
+This is a long test wh...
+<div class="foo"><ul class="foo"><li class="foo"><p class="foo">This is a long test wh...</p></li></ul></div>
+<p class='test' id='foo'>This is a long test wh...</p>
+<a name='link'><p>This </a>is a long test wh...</p>
+<p>This </a>is a long test wh...</p>
+<p>This...</p>
+
+truncatewords_html
+This is a long test which will be cutted after some words.
+<div class="foo"><ul class="foo"><li class="foo"><p class="foo">This is a long test ...</p></li></ul></div>
+<p>This. is. a. long test. Test test, test....</p>
+<a name='link' href="https://...."><p class="foo">This </a>is a long test,...</p>
+<p>This </a>is a long test,...</p>
+<p>This is ...</p>
+...

vendor/github.com/flosch/pongo2/template_tests/firstof.tpl

@@ -0,0 +1,7 @@
+{% firstof doesnotexist 42 %}
+{% firstof doesnotexist "<script>alert('xss');</script>" %}
+{% firstof doesnotexist "<script>alert('xss');</script>"|safe %}
+{% firstof doesnotexist simple.uint 42 %}
+{% firstof doesnotexist "test" simple.number 42 %}
+{% firstof %}
+{% firstof "test" "test2" %}

vendor/github.com/flosch/pongo2/template_tests/firstof.tpl.out

@@ -0,0 +1,7 @@
+42
+<script>alert('xss');</script>
+<script>alert('xss');</script>
+8
+test
+
+test

vendor/github.com/flosch/pongo2/template_tests/for.tpl

@@ -0,0 +1,9 @@
+{% for comment in complex.comments %}[{{ forloop.Counter }} {{ forloop.Counter0 }} {{ forloop.First }} {{ forloop.Last }} {{ forloop.Revcounter }} {{ forloop.Revcounter0 }}] {{ comment.Author.Name }}
+
+{# nested loop #}
+{% for char in comment.Text %}{{forloop.Parentloop.Counter0}}.{{forloop.Counter0}}:{{ char|safe }} {% endfor %}
+
+{% endfor %}
+
+reversed
+'{% for item in simple.multiple_item_list reversed %}{{ item }} {% endfor %}'

vendor/github.com/flosch/pongo2/template_tests/for.tpl.out

@@ -0,0 +1,19 @@
+[1 0 True False 3 2] user1
+
+
+0.0:" 0.1:p 0.2:o 0.3:n 0.4:g 0.5:o 0.6:2 0.7:  0.8:i 0.9:s 0.10:  0.11:n 0.12:i 0.13:c 0.14:e 0.15:! 0.16:" 
+
+[2 1 False False 2 1] user2
+
+
+1.0:c 1.1:o 1.2:m 1.3:m 1.4:e 1.5:n 1.6:t 1.7:2 1.8:  1.9:w 1.10:i 1.11:t 1.12:h 1.13:  1.14:< 1.15:s 1.16:c 1.17:r 1.18:i 1.19:p 1.20:t 1.21:> 1.22:u 1.23:n 1.24:s 1.25:a 1.26:f 1.27:e 1.28:< 1.29:/ 1.30:s 1.31:c 1.32:r 1.33:i 1.34:p 1.35:t 1.36:> 1.37:  1.38:t 1.39:a 1.40:g 1.41:s 1.42:  1.43:i 1.44:n 1.45:  1.46:i 1.47:t 
+
+[3 2 False True 1 0] user3
+
+
+2.0:< 2.1:b 2.2:> 2.3:h 2.4:e 2.5:l 2.6:l 2.7:o 2.8:! 2.9:< 2.10:/ 2.11:b 2.12:> 2.13:  2.14:t 2.15:h 2.16:e 2.17:r 2.18:e 
+
+
+
+reversed
+'55 34 21 13 8 5 3 2 1 1 '

vendor/github.com/flosch/pongo2/template_tests/function_calls_wrapper.tpl

@@ -0,0 +1,11 @@
+{{ simple.func_add(simple.func_add(5, 15), simple.number) + 17 }}
+{{ simple.func_add_iface(simple.func_add_iface(5, 15), simple.number) + 17 }}
+{{ simple.func_variadic("hello") }}
+{{ simple.func_variadic("hello, %s", simple.name) }}
+{{ simple.func_variadic("%d + %d %s %d", 5, simple.number, "is", 49) }}
+{{ simple.func_variadic_sum_int() }}
+{{ simple.func_variadic_sum_int(1) }}
+{{ simple.func_variadic_sum_int(1, 19, 185) }}
+{{ simple.func_variadic_sum_int2() }}
+{{ simple.func_variadic_sum_int2(2) }}
+{{ simple.func_variadic_sum_int2(1, 7, 100) }}

vendor/github.com/flosch/pongo2/template_tests/function_calls_wrapper.tpl.out

@@ -0,0 +1,11 @@
+79
+79
+hello
+hello, john doe
+5 + 42 is 49
+0
+1
+205
+0
+2
+108

vendor/github.com/flosch/pongo2/template_tests/if.tpl

@@ -0,0 +1,17 @@
+{% if nothing %}false{% else %}true{% endif %}
+{% if simple %}simple != nil{% endif %}
+{% if simple.uint %}uint != 0{% endif %}
+{% if simple.float %}float != 0.0{% endif %}
+{% if !simple %}false{% else %}!simple{% endif %}
+{% if !simple.uint %}false{% else %}!simple.uint{% endif %}
+{% if !simple.float %}false{% else %}!simple.float{% endif %}
+{% if "Text" in complex.post %}text field in complex.post{% endif %}
+{% if 5 in simple.intmap %}5 in simple.intmap{% endif %}
+{% if !0.0 %}!0.0{% endif %}
+{% if !0 %}!0{% endif %}
+{% if simple.number == 43 %}no{% else %}42{% endif %}
+{% if simple.number < 42 %}false{% elif simple.number > 42 %}no{% elif simple.number >= 42 %}yes{% else %}no{% endif %}
+{% if simple.number < 42 %}false{% elif simple.number > 42 %}no{% elif simple.number != 42 %}no{% else %}yes{% endif %}
+{% if 0 %}!0{% elif nothing %}nothing{% else %}true{% endif %}
+{% if 0 %}!0{% elif simple.float %}simple.float{% else %}false{% endif %}
+{% if 0 %}!0{% elif !simple.float %}false{% elif "Text" in complex.post%}Elseif with no else{% endif %}

vendor/github.com/flosch/pongo2/template_tests/if.tpl.out

@@ -0,0 +1,17 @@
+true
+simple != nil
+uint != 0
+float != 0.0
+!simple
+!simple.uint
+!simple.float
+text field in complex.post
+5 in simple.intmap
+!0.0
+!0
+42
+yes
+yes
+true
+simple.float
+Elseif with no else

vendor/github.com/flosch/pongo2/template_tests/ifchanged.tpl

@@ -0,0 +1,9 @@
+{% for comment in complex.comments2 %}
+    {% ifchanged %}New comment from another user {{ comment.Author.Name }}{% endifchanged %}
+    {% ifchanged comment.Author.Validated %}
+        Validated changed to {{ comment.Author.Validated }}
+    {% else %}
+        Validated value not changed
+    {% endifchanged %}
+    {% ifchanged comment.Author.Name comment.Date %}Comment's author name or date changed{% endifchanged %}
+{% endfor %}

vendor/github.com/flosch/pongo2/template_tests/ifchanged.tpl.out

@@ -0,0 +1,18 @@
+
+    New comment from another user user1
+    
+        Validated changed to True
+    
+    Comment's author name or date changed
+
+    
+    
+        Validated value not changed
+    
+    Comment's author name or date changed
+
+    New comment from another user user3
+    
+        Validated changed to False
+    
+    Comment's author name or date changed

vendor/github.com/flosch/pongo2/template_tests/includes.helper

@@ -0,0 +1 @@
+I'm {{ what_am_i }}{{ number }}

vendor/github.com/flosch/pongo2/template_tests/includes.tpl

@@ -0,0 +1,4 @@
+Start '{% include "includes.helper" %}' End
+Start '{% include "includes.helper" with what_am_i=simple.name only %}' End
+Start '{% include "includes.helper" with what_am_i=simple.name %}' End
+Start '{% include simple.included_file|lower with number=7 what_am_i="guest" %}' End

vendor/github.com/flosch/pongo2/template_tests/includes.tpl.out

@@ -0,0 +1,4 @@
+Start 'I'm 11' End
+Start 'I'm john doe' End
+Start 'I'm john doe11' End
+Start 'I'm guest7' End

vendor/github.com/flosch/pongo2/template_tests/inheritance/base.tpl

@@ -0,0 +1,3 @@
+{% extends "inheritance2/skeleton.tpl" %}
+
+{% block body %}This is base's body{% block content %}Default content{% endblock %}{% endblock %}

vendor/github.com/flosch/pongo2/template_tests/inheritance/base2.tpl

@@ -0,0 +1 @@
+{% include "doesnotexist.tpl" %}

vendor/github.com/flosch/pongo2/template_tests/inheritance/cycle_include.tpl

@@ -0,0 +1 @@
+Included '{{ cycleitem }}'.

vendor/github.com/flosch/pongo2/template_tests/inheritance/inheritance2/skeleton.tpl

@@ -0,0 +1 @@
+Start#{% block body %}Default body{% endblock %}#End