mirror of
https://github.com/Luzifer/badge-gen.git
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Fix missing vendor libraries
This commit is contained in:
parent
8be6301e9b
commit
7a77571dbd
7 changed files with 731 additions and 0 deletions
8
Godeps/Godeps.json
generated
8
Godeps/Godeps.json
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@ -82,6 +82,14 @@
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"ImportPath": "golang.org/x/image/math/fixed",
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"ImportPath": "golang.org/x/image/math/fixed",
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"Rev": "97680175a5267bb8b31f1923e7a66df98013b11a"
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"Rev": "97680175a5267bb8b31f1923e7a66df98013b11a"
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},
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},
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{
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"ImportPath": "golang.org/x/net/context",
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"Rev": "ef00b378c73f107bf44d5c9b69875255ce89b79a"
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},
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{
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"ImportPath": "golang.org/x/net/context/ctxhttp",
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"Rev": "ef00b378c73f107bf44d5c9b69875255ce89b79a"
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},
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{
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{
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"ImportPath": "gopkg.in/yaml.v2",
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"ImportPath": "gopkg.in/yaml.v2",
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"Rev": "53feefa2559fb8dfa8d81baad31be332c97d6c77"
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"Rev": "53feefa2559fb8dfa8d81baad31be332c97d6c77"
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27
vendor/golang.org/x/net/LICENSE
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vendored
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27
vendor/golang.org/x/net/LICENSE
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vendored
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Copyright (c) 2009 The Go Authors. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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|
notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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|
copyright notice, this list of conditions and the following disclaimer
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|
in the documentation and/or other materials provided with the
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|
distribution.
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* Neither the name of Google Inc. nor the names of its
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|
contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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|
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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22
vendor/golang.org/x/net/PATENTS
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vendored
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vendor/golang.org/x/net/PATENTS
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Additional IP Rights Grant (Patents)
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"This implementation" means the copyrightable works distributed by
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Google as part of the Go project.
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Google hereby grants to You a perpetual, worldwide, non-exclusive,
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no-charge, royalty-free, irrevocable (except as stated in this section)
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patent license to make, have made, use, offer to sell, sell, import,
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transfer and otherwise run, modify and propagate the contents of this
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|
implementation of Go, where such license applies only to those patent
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claims, both currently owned or controlled by Google and acquired in
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the future, licensable by Google that are necessarily infringed by this
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implementation of Go. This grant does not include claims that would be
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infringed only as a consequence of further modification of this
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implementation. If you or your agent or exclusive licensee institute or
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order or agree to the institution of patent litigation against any
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entity (including a cross-claim or counterclaim in a lawsuit) alleging
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that this implementation of Go or any code incorporated within this
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implementation of Go constitutes direct or contributory patent
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infringement, or inducement of patent infringement, then any patent
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rights granted to you under this License for this implementation of Go
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shall terminate as of the date such litigation is filed.
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156
vendor/golang.org/x/net/context/context.go
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vendored
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156
vendor/golang.org/x/net/context/context.go
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// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package context defines the Context type, which carries deadlines,
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// cancelation signals, and other request-scoped values across API boundaries
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// and between processes.
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//
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// Incoming requests to a server should create a Context, and outgoing calls to
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// servers should accept a Context. The chain of function calls between must
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// propagate the Context, optionally replacing it with a modified copy created
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// using WithDeadline, WithTimeout, WithCancel, or WithValue.
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//
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// Programs that use Contexts should follow these rules to keep interfaces
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// consistent across packages and enable static analysis tools to check context
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// propagation:
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//
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// Do not store Contexts inside a struct type; instead, pass a Context
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// explicitly to each function that needs it. The Context should be the first
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// parameter, typically named ctx:
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//
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// func DoSomething(ctx context.Context, arg Arg) error {
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// // ... use ctx ...
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// }
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//
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// Do not pass a nil Context, even if a function permits it. Pass context.TODO
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// if you are unsure about which Context to use.
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//
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// Use context Values only for request-scoped data that transits processes and
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// APIs, not for passing optional parameters to functions.
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//
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// The same Context may be passed to functions running in different goroutines;
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// Contexts are safe for simultaneous use by multiple goroutines.
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//
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// See http://blog.golang.org/context for example code for a server that uses
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// Contexts.
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package context
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import "time"
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// A Context carries a deadline, a cancelation signal, and other values across
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// API boundaries.
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//
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// Context's methods may be called by multiple goroutines simultaneously.
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type Context interface {
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// Deadline returns the time when work done on behalf of this context
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// should be canceled. Deadline returns ok==false when no deadline is
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// set. Successive calls to Deadline return the same results.
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Deadline() (deadline time.Time, ok bool)
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// Done returns a channel that's closed when work done on behalf of this
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// context should be canceled. Done may return nil if this context can
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// never be canceled. Successive calls to Done return the same value.
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//
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// WithCancel arranges for Done to be closed when cancel is called;
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// WithDeadline arranges for Done to be closed when the deadline
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// expires; WithTimeout arranges for Done to be closed when the timeout
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// elapses.
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//
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// Done is provided for use in select statements:
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//
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// // Stream generates values with DoSomething and sends them to out
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// // until DoSomething returns an error or ctx.Done is closed.
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// func Stream(ctx context.Context, out chan<- Value) error {
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// for {
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// v, err := DoSomething(ctx)
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// if err != nil {
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// return err
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// }
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// select {
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// case <-ctx.Done():
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// return ctx.Err()
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// case out <- v:
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// }
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// }
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// }
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//
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// See http://blog.golang.org/pipelines for more examples of how to use
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// a Done channel for cancelation.
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Done() <-chan struct{}
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// Err returns a non-nil error value after Done is closed. Err returns
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// Canceled if the context was canceled or DeadlineExceeded if the
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// context's deadline passed. No other values for Err are defined.
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// After Done is closed, successive calls to Err return the same value.
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Err() error
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// Value returns the value associated with this context for key, or nil
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// if no value is associated with key. Successive calls to Value with
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// the same key returns the same result.
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//
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// Use context values only for request-scoped data that transits
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// processes and API boundaries, not for passing optional parameters to
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// functions.
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//
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// A key identifies a specific value in a Context. Functions that wish
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// to store values in Context typically allocate a key in a global
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// variable then use that key as the argument to context.WithValue and
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// Context.Value. A key can be any type that supports equality;
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// packages should define keys as an unexported type to avoid
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// collisions.
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//
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// Packages that define a Context key should provide type-safe accessors
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// for the values stores using that key:
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//
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// // Package user defines a User type that's stored in Contexts.
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// package user
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//
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// import "golang.org/x/net/context"
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//
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// // User is the type of value stored in the Contexts.
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// type User struct {...}
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//
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// // key is an unexported type for keys defined in this package.
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// // This prevents collisions with keys defined in other packages.
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// type key int
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//
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// // userKey is the key for user.User values in Contexts. It is
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// // unexported; clients use user.NewContext and user.FromContext
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// // instead of using this key directly.
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// var userKey key = 0
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//
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// // NewContext returns a new Context that carries value u.
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// func NewContext(ctx context.Context, u *User) context.Context {
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// return context.WithValue(ctx, userKey, u)
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// }
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//
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// // FromContext returns the User value stored in ctx, if any.
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// func FromContext(ctx context.Context) (*User, bool) {
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// u, ok := ctx.Value(userKey).(*User)
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// return u, ok
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// }
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Value(key interface{}) interface{}
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}
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// Background returns a non-nil, empty Context. It is never canceled, has no
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// values, and has no deadline. It is typically used by the main function,
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// initialization, and tests, and as the top-level Context for incoming
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// requests.
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func Background() Context {
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return background
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}
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// TODO returns a non-nil, empty Context. Code should use context.TODO when
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// it's unclear which Context to use or it is not yet available (because the
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// surrounding function has not yet been extended to accept a Context
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// parameter). TODO is recognized by static analysis tools that determine
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// whether Contexts are propagated correctly in a program.
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func TODO() Context {
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return todo
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}
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// A CancelFunc tells an operation to abandon its work.
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// A CancelFunc does not wait for the work to stop.
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// After the first call, subsequent calls to a CancelFunc do nothing.
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type CancelFunc func()
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146
vendor/golang.org/x/net/context/ctxhttp/ctxhttp.go
generated
vendored
Normal file
146
vendor/golang.org/x/net/context/ctxhttp/ctxhttp.go
generated
vendored
Normal file
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@ -0,0 +1,146 @@
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|
// Copyright 2015 The Go Authors. All rights reserved.
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|
// Use of this source code is governed by a BSD-style
|
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|
// license that can be found in the LICENSE file.
|
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|
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// Package ctxhttp provides helper functions for performing context-aware HTTP requests.
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package ctxhttp
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import (
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"io"
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"net/http"
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"net/url"
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"strings"
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"golang.org/x/net/context"
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)
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func nop() {}
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var (
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testHookContextDoneBeforeHeaders = nop
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testHookDoReturned = nop
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testHookDidBodyClose = nop
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)
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// Do sends an HTTP request with the provided http.Client and returns an HTTP response.
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// If the client is nil, http.DefaultClient is used.
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|
// If the context is canceled or times out, ctx.Err() will be returned.
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|
func Do(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
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|
if client == nil {
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|
client = http.DefaultClient
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|
}
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|
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|
// TODO(djd): Respect any existing value of req.Cancel.
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|
cancel := make(chan struct{})
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|
req.Cancel = cancel
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|
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|
type responseAndError struct {
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|
resp *http.Response
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|
err error
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|
}
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|
result := make(chan responseAndError, 1)
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|
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|
// Make local copies of test hooks closed over by goroutines below.
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|
// Prevents data races in tests.
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|
testHookDoReturned := testHookDoReturned
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|
testHookDidBodyClose := testHookDidBodyClose
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|
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|
go func() {
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|
resp, err := client.Do(req)
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|
testHookDoReturned()
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|
result <- responseAndError{resp, err}
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|
}()
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|
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var resp *http.Response
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|
|
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|
select {
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|
case <-ctx.Done():
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|
testHookContextDoneBeforeHeaders()
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|
close(cancel)
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|
// Clean up after the goroutine calling client.Do:
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|
go func() {
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|
if r := <-result; r.resp != nil {
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||||||
|
testHookDidBodyClose()
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||||||
|
r.resp.Body.Close()
|
||||||
|
}
|
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|
}()
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|
return nil, ctx.Err()
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|
case r := <-result:
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||||||
|
var err error
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||||||
|
resp, err = r.resp, r.err
|
||||||
|
if err != nil {
|
||||||
|
return resp, err
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
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|
c := make(chan struct{})
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|
go func() {
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||||||
|
select {
|
||||||
|
case <-ctx.Done():
|
||||||
|
close(cancel)
|
||||||
|
case <-c:
|
||||||
|
// The response's Body is closed.
|
||||||
|
}
|
||||||
|
}()
|
||||||
|
resp.Body = ¬ifyingReader{resp.Body, c}
|
||||||
|
|
||||||
|
return resp, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// Get issues a GET request via the Do function.
|
||||||
|
func Get(ctx context.Context, client *http.Client, url string) (*http.Response, error) {
|
||||||
|
req, err := http.NewRequest("GET", url, nil)
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
return Do(ctx, client, req)
|
||||||
|
}
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||||||
|
|
||||||
|
// Head issues a HEAD request via the Do function.
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||||||
|
func Head(ctx context.Context, client *http.Client, url string) (*http.Response, error) {
|
||||||
|
req, err := http.NewRequest("HEAD", url, nil)
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
return Do(ctx, client, req)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Post issues a POST request via the Do function.
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||||||
|
func Post(ctx context.Context, client *http.Client, url string, bodyType string, body io.Reader) (*http.Response, error) {
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||||||
|
req, err := http.NewRequest("POST", url, body)
|
||||||
|
if err != nil {
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||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
req.Header.Set("Content-Type", bodyType)
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||||||
|
return Do(ctx, client, req)
|
||||||
|
}
|
||||||
|
|
||||||
|
// PostForm issues a POST request via the Do function.
|
||||||
|
func PostForm(ctx context.Context, client *http.Client, url string, data url.Values) (*http.Response, error) {
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||||||
|
return Post(ctx, client, url, "application/x-www-form-urlencoded", strings.NewReader(data.Encode()))
|
||||||
|
}
|
||||||
|
|
||||||
|
// notifyingReader is an io.ReadCloser that closes the notify channel after
|
||||||
|
// Close is called or a Read fails on the underlying ReadCloser.
|
||||||
|
type notifyingReader struct {
|
||||||
|
io.ReadCloser
|
||||||
|
notify chan<- struct{}
|
||||||
|
}
|
||||||
|
|
||||||
|
func (r *notifyingReader) Read(p []byte) (int, error) {
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||||||
|
n, err := r.ReadCloser.Read(p)
|
||||||
|
if err != nil && r.notify != nil {
|
||||||
|
close(r.notify)
|
||||||
|
r.notify = nil
|
||||||
|
}
|
||||||
|
return n, err
|
||||||
|
}
|
||||||
|
|
||||||
|
func (r *notifyingReader) Close() error {
|
||||||
|
err := r.ReadCloser.Close()
|
||||||
|
if r.notify != nil {
|
||||||
|
close(r.notify)
|
||||||
|
r.notify = nil
|
||||||
|
}
|
||||||
|
return err
|
||||||
|
}
|
72
vendor/golang.org/x/net/context/go17.go
generated
vendored
Normal file
72
vendor/golang.org/x/net/context/go17.go
generated
vendored
Normal file
|
@ -0,0 +1,72 @@
|
||||||
|
// Copyright 2016 The Go Authors. All rights reserved.
|
||||||
|
// Use of this source code is governed by a BSD-style
|
||||||
|
// license that can be found in the LICENSE file.
|
||||||
|
|
||||||
|
// +build go1.7
|
||||||
|
|
||||||
|
package context
|
||||||
|
|
||||||
|
import (
|
||||||
|
"context" // standard library's context, as of Go 1.7
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
var (
|
||||||
|
todo = context.TODO()
|
||||||
|
background = context.Background()
|
||||||
|
)
|
||||||
|
|
||||||
|
// Canceled is the error returned by Context.Err when the context is canceled.
|
||||||
|
var Canceled = context.Canceled
|
||||||
|
|
||||||
|
// DeadlineExceeded is the error returned by Context.Err when the context's
|
||||||
|
// deadline passes.
|
||||||
|
var DeadlineExceeded = context.DeadlineExceeded
|
||||||
|
|
||||||
|
// WithCancel returns a copy of parent with a new Done channel. The returned
|
||||||
|
// context's Done channel is closed when the returned cancel function is called
|
||||||
|
// or when the parent context's Done channel is closed, whichever happens first.
|
||||||
|
//
|
||||||
|
// Canceling this context releases resources associated with it, so code should
|
||||||
|
// call cancel as soon as the operations running in this Context complete.
|
||||||
|
func WithCancel(parent Context) (ctx Context, cancel CancelFunc) {
|
||||||
|
ctx, f := context.WithCancel(parent)
|
||||||
|
return ctx, CancelFunc(f)
|
||||||
|
}
|
||||||
|
|
||||||
|
// WithDeadline returns a copy of the parent context with the deadline adjusted
|
||||||
|
// to be no later than d. If the parent's deadline is already earlier than d,
|
||||||
|
// WithDeadline(parent, d) is semantically equivalent to parent. The returned
|
||||||
|
// context's Done channel is closed when the deadline expires, when the returned
|
||||||
|
// cancel function is called, or when the parent context's Done channel is
|
||||||
|
// closed, whichever happens first.
|
||||||
|
//
|
||||||
|
// Canceling this context releases resources associated with it, so code should
|
||||||
|
// call cancel as soon as the operations running in this Context complete.
|
||||||
|
func WithDeadline(parent Context, deadline time.Time) (Context, CancelFunc) {
|
||||||
|
ctx, f := context.WithDeadline(parent, deadline)
|
||||||
|
return ctx, CancelFunc(f)
|
||||||
|
}
|
||||||
|
|
||||||
|
// WithTimeout returns WithDeadline(parent, time.Now().Add(timeout)).
|
||||||
|
//
|
||||||
|
// Canceling this context releases resources associated with it, so code should
|
||||||
|
// call cancel as soon as the operations running in this Context complete:
|
||||||
|
//
|
||||||
|
// func slowOperationWithTimeout(ctx context.Context) (Result, error) {
|
||||||
|
// ctx, cancel := context.WithTimeout(ctx, 100*time.Millisecond)
|
||||||
|
// defer cancel() // releases resources if slowOperation completes before timeout elapses
|
||||||
|
// return slowOperation(ctx)
|
||||||
|
// }
|
||||||
|
func WithTimeout(parent Context, timeout time.Duration) (Context, CancelFunc) {
|
||||||
|
return WithDeadline(parent, time.Now().Add(timeout))
|
||||||
|
}
|
||||||
|
|
||||||
|
// WithValue returns a copy of parent in which the value associated with key is
|
||||||
|
// val.
|
||||||
|
//
|
||||||
|
// Use context Values only for request-scoped data that transits processes and
|
||||||
|
// APIs, not for passing optional parameters to functions.
|
||||||
|
func WithValue(parent Context, key interface{}, val interface{}) Context {
|
||||||
|
return context.WithValue(parent, key, val)
|
||||||
|
}
|
300
vendor/golang.org/x/net/context/pre_go17.go
generated
vendored
Normal file
300
vendor/golang.org/x/net/context/pre_go17.go
generated
vendored
Normal file
|
@ -0,0 +1,300 @@
|
||||||
|
// Copyright 2014 The Go Authors. All rights reserved.
|
||||||
|
// Use of this source code is governed by a BSD-style
|
||||||
|
// license that can be found in the LICENSE file.
|
||||||
|
|
||||||
|
// +build !go1.7
|
||||||
|
|
||||||
|
package context
|
||||||
|
|
||||||
|
import (
|
||||||
|
"errors"
|
||||||
|
"fmt"
|
||||||
|
"sync"
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
// An emptyCtx is never canceled, has no values, and has no deadline. It is not
|
||||||
|
// struct{}, since vars of this type must have distinct addresses.
|
||||||
|
type emptyCtx int
|
||||||
|
|
||||||
|
func (*emptyCtx) Deadline() (deadline time.Time, ok bool) {
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
func (*emptyCtx) Done() <-chan struct{} {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func (*emptyCtx) Err() error {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func (*emptyCtx) Value(key interface{}) interface{} {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func (e *emptyCtx) String() string {
|
||||||
|
switch e {
|
||||||
|
case background:
|
||||||
|
return "context.Background"
|
||||||
|
case todo:
|
||||||
|
return "context.TODO"
|
||||||
|
}
|
||||||
|
return "unknown empty Context"
|
||||||
|
}
|
||||||
|
|
||||||
|
var (
|
||||||
|
background = new(emptyCtx)
|
||||||
|
todo = new(emptyCtx)
|
||||||
|
)
|
||||||
|
|
||||||
|
// Canceled is the error returned by Context.Err when the context is canceled.
|
||||||
|
var Canceled = errors.New("context canceled")
|
||||||
|
|
||||||
|
// DeadlineExceeded is the error returned by Context.Err when the context's
|
||||||
|
// deadline passes.
|
||||||
|
var DeadlineExceeded = errors.New("context deadline exceeded")
|
||||||
|
|
||||||
|
// WithCancel returns a copy of parent with a new Done channel. The returned
|
||||||
|
// context's Done channel is closed when the returned cancel function is called
|
||||||
|
// or when the parent context's Done channel is closed, whichever happens first.
|
||||||
|
//
|
||||||
|
// Canceling this context releases resources associated with it, so code should
|
||||||
|
// call cancel as soon as the operations running in this Context complete.
|
||||||
|
func WithCancel(parent Context) (ctx Context, cancel CancelFunc) {
|
||||||
|
c := newCancelCtx(parent)
|
||||||
|
propagateCancel(parent, c)
|
||||||
|
return c, func() { c.cancel(true, Canceled) }
|
||||||
|
}
|
||||||
|
|
||||||
|
// newCancelCtx returns an initialized cancelCtx.
|
||||||
|
func newCancelCtx(parent Context) *cancelCtx {
|
||||||
|
return &cancelCtx{
|
||||||
|
Context: parent,
|
||||||
|
done: make(chan struct{}),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// propagateCancel arranges for child to be canceled when parent is.
|
||||||
|
func propagateCancel(parent Context, child canceler) {
|
||||||
|
if parent.Done() == nil {
|
||||||
|
return // parent is never canceled
|
||||||
|
}
|
||||||
|
if p, ok := parentCancelCtx(parent); ok {
|
||||||
|
p.mu.Lock()
|
||||||
|
if p.err != nil {
|
||||||
|
// parent has already been canceled
|
||||||
|
child.cancel(false, p.err)
|
||||||
|
} else {
|
||||||
|
if p.children == nil {
|
||||||
|
p.children = make(map[canceler]bool)
|
||||||
|
}
|
||||||
|
p.children[child] = true
|
||||||
|
}
|
||||||
|
p.mu.Unlock()
|
||||||
|
} else {
|
||||||
|
go func() {
|
||||||
|
select {
|
||||||
|
case <-parent.Done():
|
||||||
|
child.cancel(false, parent.Err())
|
||||||
|
case <-child.Done():
|
||||||
|
}
|
||||||
|
}()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// parentCancelCtx follows a chain of parent references until it finds a
|
||||||
|
// *cancelCtx. This function understands how each of the concrete types in this
|
||||||
|
// package represents its parent.
|
||||||
|
func parentCancelCtx(parent Context) (*cancelCtx, bool) {
|
||||||
|
for {
|
||||||
|
switch c := parent.(type) {
|
||||||
|
case *cancelCtx:
|
||||||
|
return c, true
|
||||||
|
case *timerCtx:
|
||||||
|
return c.cancelCtx, true
|
||||||
|
case *valueCtx:
|
||||||
|
parent = c.Context
|
||||||
|
default:
|
||||||
|
return nil, false
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// removeChild removes a context from its parent.
|
||||||
|
func removeChild(parent Context, child canceler) {
|
||||||
|
p, ok := parentCancelCtx(parent)
|
||||||
|
if !ok {
|
||||||
|
return
|
||||||
|
}
|
||||||
|
p.mu.Lock()
|
||||||
|
if p.children != nil {
|
||||||
|
delete(p.children, child)
|
||||||
|
}
|
||||||
|
p.mu.Unlock()
|
||||||
|
}
|
||||||
|
|
||||||
|
// A canceler is a context type that can be canceled directly. The
|
||||||
|
// implementations are *cancelCtx and *timerCtx.
|
||||||
|
type canceler interface {
|
||||||
|
cancel(removeFromParent bool, err error)
|
||||||
|
Done() <-chan struct{}
|
||||||
|
}
|
||||||
|
|
||||||
|
// A cancelCtx can be canceled. When canceled, it also cancels any children
|
||||||
|
// that implement canceler.
|
||||||
|
type cancelCtx struct {
|
||||||
|
Context
|
||||||
|
|
||||||
|
done chan struct{} // closed by the first cancel call.
|
||||||
|
|
||||||
|
mu sync.Mutex
|
||||||
|
children map[canceler]bool // set to nil by the first cancel call
|
||||||
|
err error // set to non-nil by the first cancel call
|
||||||
|
}
|
||||||
|
|
||||||
|
func (c *cancelCtx) Done() <-chan struct{} {
|
||||||
|
return c.done
|
||||||
|
}
|
||||||
|
|
||||||
|
func (c *cancelCtx) Err() error {
|
||||||
|
c.mu.Lock()
|
||||||
|
defer c.mu.Unlock()
|
||||||
|
return c.err
|
||||||
|
}
|
||||||
|
|
||||||
|
func (c *cancelCtx) String() string {
|
||||||
|
return fmt.Sprintf("%v.WithCancel", c.Context)
|
||||||
|
}
|
||||||
|
|
||||||
|
// cancel closes c.done, cancels each of c's children, and, if
|
||||||
|
// removeFromParent is true, removes c from its parent's children.
|
||||||
|
func (c *cancelCtx) cancel(removeFromParent bool, err error) {
|
||||||
|
if err == nil {
|
||||||
|
panic("context: internal error: missing cancel error")
|
||||||
|
}
|
||||||
|
c.mu.Lock()
|
||||||
|
if c.err != nil {
|
||||||
|
c.mu.Unlock()
|
||||||
|
return // already canceled
|
||||||
|
}
|
||||||
|
c.err = err
|
||||||
|
close(c.done)
|
||||||
|
for child := range c.children {
|
||||||
|
// NOTE: acquiring the child's lock while holding parent's lock.
|
||||||
|
child.cancel(false, err)
|
||||||
|
}
|
||||||
|
c.children = nil
|
||||||
|
c.mu.Unlock()
|
||||||
|
|
||||||
|
if removeFromParent {
|
||||||
|
removeChild(c.Context, c)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// WithDeadline returns a copy of the parent context with the deadline adjusted
|
||||||
|
// to be no later than d. If the parent's deadline is already earlier than d,
|
||||||
|
// WithDeadline(parent, d) is semantically equivalent to parent. The returned
|
||||||
|
// context's Done channel is closed when the deadline expires, when the returned
|
||||||
|
// cancel function is called, or when the parent context's Done channel is
|
||||||
|
// closed, whichever happens first.
|
||||||
|
//
|
||||||
|
// Canceling this context releases resources associated with it, so code should
|
||||||
|
// call cancel as soon as the operations running in this Context complete.
|
||||||
|
func WithDeadline(parent Context, deadline time.Time) (Context, CancelFunc) {
|
||||||
|
if cur, ok := parent.Deadline(); ok && cur.Before(deadline) {
|
||||||
|
// The current deadline is already sooner than the new one.
|
||||||
|
return WithCancel(parent)
|
||||||
|
}
|
||||||
|
c := &timerCtx{
|
||||||
|
cancelCtx: newCancelCtx(parent),
|
||||||
|
deadline: deadline,
|
||||||
|
}
|
||||||
|
propagateCancel(parent, c)
|
||||||
|
d := deadline.Sub(time.Now())
|
||||||
|
if d <= 0 {
|
||||||
|
c.cancel(true, DeadlineExceeded) // deadline has already passed
|
||||||
|
return c, func() { c.cancel(true, Canceled) }
|
||||||
|
}
|
||||||
|
c.mu.Lock()
|
||||||
|
defer c.mu.Unlock()
|
||||||
|
if c.err == nil {
|
||||||
|
c.timer = time.AfterFunc(d, func() {
|
||||||
|
c.cancel(true, DeadlineExceeded)
|
||||||
|
})
|
||||||
|
}
|
||||||
|
return c, func() { c.cancel(true, Canceled) }
|
||||||
|
}
|
||||||
|
|
||||||
|
// A timerCtx carries a timer and a deadline. It embeds a cancelCtx to
|
||||||
|
// implement Done and Err. It implements cancel by stopping its timer then
|
||||||
|
// delegating to cancelCtx.cancel.
|
||||||
|
type timerCtx struct {
|
||||||
|
*cancelCtx
|
||||||
|
timer *time.Timer // Under cancelCtx.mu.
|
||||||
|
|
||||||
|
deadline time.Time
|
||||||
|
}
|
||||||
|
|
||||||
|
func (c *timerCtx) Deadline() (deadline time.Time, ok bool) {
|
||||||
|
return c.deadline, true
|
||||||
|
}
|
||||||
|
|
||||||
|
func (c *timerCtx) String() string {
|
||||||
|
return fmt.Sprintf("%v.WithDeadline(%s [%s])", c.cancelCtx.Context, c.deadline, c.deadline.Sub(time.Now()))
|
||||||
|
}
|
||||||
|
|
||||||
|
func (c *timerCtx) cancel(removeFromParent bool, err error) {
|
||||||
|
c.cancelCtx.cancel(false, err)
|
||||||
|
if removeFromParent {
|
||||||
|
// Remove this timerCtx from its parent cancelCtx's children.
|
||||||
|
removeChild(c.cancelCtx.Context, c)
|
||||||
|
}
|
||||||
|
c.mu.Lock()
|
||||||
|
if c.timer != nil {
|
||||||
|
c.timer.Stop()
|
||||||
|
c.timer = nil
|
||||||
|
}
|
||||||
|
c.mu.Unlock()
|
||||||
|
}
|
||||||
|
|
||||||
|
// WithTimeout returns WithDeadline(parent, time.Now().Add(timeout)).
|
||||||
|
//
|
||||||
|
// Canceling this context releases resources associated with it, so code should
|
||||||
|
// call cancel as soon as the operations running in this Context complete:
|
||||||
|
//
|
||||||
|
// func slowOperationWithTimeout(ctx context.Context) (Result, error) {
|
||||||
|
// ctx, cancel := context.WithTimeout(ctx, 100*time.Millisecond)
|
||||||
|
// defer cancel() // releases resources if slowOperation completes before timeout elapses
|
||||||
|
// return slowOperation(ctx)
|
||||||
|
// }
|
||||||
|
func WithTimeout(parent Context, timeout time.Duration) (Context, CancelFunc) {
|
||||||
|
return WithDeadline(parent, time.Now().Add(timeout))
|
||||||
|
}
|
||||||
|
|
||||||
|
// WithValue returns a copy of parent in which the value associated with key is
|
||||||
|
// val.
|
||||||
|
//
|
||||||
|
// Use context Values only for request-scoped data that transits processes and
|
||||||
|
// APIs, not for passing optional parameters to functions.
|
||||||
|
func WithValue(parent Context, key interface{}, val interface{}) Context {
|
||||||
|
return &valueCtx{parent, key, val}
|
||||||
|
}
|
||||||
|
|
||||||
|
// A valueCtx carries a key-value pair. It implements Value for that key and
|
||||||
|
// delegates all other calls to the embedded Context.
|
||||||
|
type valueCtx struct {
|
||||||
|
Context
|
||||||
|
key, val interface{}
|
||||||
|
}
|
||||||
|
|
||||||
|
func (c *valueCtx) String() string {
|
||||||
|
return fmt.Sprintf("%v.WithValue(%#v, %#v)", c.Context, c.key, c.val)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (c *valueCtx) Value(key interface{}) interface{} {
|
||||||
|
if c.key == key {
|
||||||
|
return c.val
|
||||||
|
}
|
||||||
|
return c.Context.Value(key)
|
||||||
|
}
|
Loading…
Reference in a new issue