commit 28b00846319eb6b2d9902e3b1a8acee8494b73f6
Author: Knut Ahlers <knut@ahlers.me>
Date:   Wed Feb 7 10:02:13 2018 +0100

    Initial version

diff --git a/filters.go b/filters.go
new file mode 100644
index 0000000..8dc45c4
--- /dev/null
+++ b/filters.go
@@ -0,0 +1,34 @@
+package main
+
+import (
+	"context"
+
+	"github.com/google/go-github/github"
+	log "github.com/sirupsen/logrus"
+)
+
+type filterFunc func(*github.Repository) bool
+
+var filters = map[string]filterFunc{
+	"fork":       filterFork,
+	"dockerfile": filterDockerfile,
+	"public":     filterPublic,
+}
+
+func filterDockerfile(repo *github.Repository) bool {
+	ctx := context.Background()
+	_, _, resp, err := client.Repositories.GetContents(ctx, *repo.Owner.Login, *repo.Name, "Dockerfile", nil)
+	if err != nil {
+		if resp.StatusCode == 404 {
+			return false
+		}
+
+		log.WithError(err).Error("Error while looking for Dockerfile")
+		return false
+	}
+
+	return true
+}
+
+func filterFork(repo *github.Repository) bool   { return repo.Fork != nil && *repo.Fork }
+func filterPublic(repo *github.Repository) bool { return repo.Private != nil && !*repo.Private }
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..148ebb9
--- /dev/null
+++ b/main.go
@@ -0,0 +1,197 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"regexp"
+	"strings"
+	"text/template"
+
+	"golang.org/x/oauth2"
+
+	"github.com/Luzifer/rconfig"
+	"github.com/google/go-github/github"
+	"github.com/gosimple/slug"
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	cfg = struct {
+		Filters        []string `flag:"filter,f" default:"" description:"Filters to match the repos against"`
+		GithubToken    string   `flag:"token" default:"" env:"GITHUB_TOKEN" description:"Token to access Github API"`
+		LogLevel       string   `flag:"log-level" default:"info" description:"Log level for output (debug, info, warn, error, fatal)"`
+		NameRegex      string   `flag:"name-regex" default:".*" description:"Regex to match the name against"`
+		Output         string   `flag:"out,o" default:"-" description:"File to write to (- = stdout)"`
+		Template       string   `flag:"template" default:"" description:"Template file to use for rendering" validate:"nonzero"`
+		VersionAndExit bool     `flag:"version" default:"false" description:"Prints current version and exits"`
+	}{}
+
+	client *github.Client
+
+	version = "dev"
+)
+
+func init() {
+	if err := rconfig.ParseAndValidate(&cfg); err != nil {
+		log.Fatalf("Unable to parse commandline options: %s", err)
+	}
+
+	if l, err := log.ParseLevel(cfg.LogLevel); err != nil {
+		log.WithError(err).Fatalf("Could not parse log level")
+	} else {
+		log.SetLevel(l)
+	}
+
+	if cfg.VersionAndExit {
+		fmt.Printf("repo-template %s\n", version)
+		os.Exit(0)
+	}
+}
+
+func main() {
+	ctx := context.Background()
+	ts := oauth2.StaticTokenSource(
+		&oauth2.Token{AccessToken: cfg.GithubToken},
+	)
+	tc := oauth2.NewClient(ctx, ts)
+
+	client = github.NewClient(tc)
+
+	repos, err := fetchRepos()
+	if err != nil {
+		log.WithError(err).Fatal("Error while fetching repos")
+	}
+
+	for _, repo := range repos {
+		if !regexp.MustCompile(cfg.NameRegex).MatchString(*repo.FullName) {
+			continue
+		}
+
+		skip := false
+
+		for _, f := range cfg.Filters {
+			if f == "" {
+				continue
+			}
+
+			var (
+				inverse = false
+				filter  = f
+			)
+
+			if strings.HasPrefix(filter, "no-") {
+				inverse = true
+				filter = filter[3:]
+			}
+
+			if filters[filter](repo) == inverse {
+				log.WithFields(log.Fields{
+					"filter": filter,
+					"repo":   *repo.FullName,
+				}).Debug("Repo was filtered")
+				skip = true
+			}
+		}
+
+		if skip {
+			continue
+		}
+
+		log.WithFields(log.Fields{
+			"repo":    *repo.FullName,
+			"private": *repo.Private,
+			"fork":    *repo.Fork,
+		}).Print("Found repo")
+
+		if err := render(repo); err != nil {
+			log.WithError(err).Error("Unable to render output")
+			continue
+		}
+	}
+}
+
+func fetchRepos() ([]*github.Repository, error) {
+	var (
+		ctx   = context.Background()
+		repos = []*github.Repository{}
+	)
+
+	opt := &github.RepositoryListOptions{
+		ListOptions: github.ListOptions{PerPage: 100},
+	}
+
+	for {
+		rs, res, err := client.Repositories.List(ctx, "", opt)
+
+		if err != nil {
+			return nil, err
+		}
+
+		repos = append(repos, rs...)
+
+		if res.NextPage == 0 {
+			break
+		}
+		opt.Page = res.NextPage
+	}
+
+	return repos, nil
+}
+
+func render(repo *github.Repository) error {
+	var outFile io.Writer
+	if cfg.Output == "-" {
+		outFile = os.Stdout
+	} else {
+		outName, err := getOutfile(repo)
+		if err != nil {
+			return err
+		}
+
+		log.WithFields(log.Fields{
+			"repo":    *repo.FullName,
+			"outName": outName,
+		}).Debug("")
+
+		f, err := os.Create(outName)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+		outFile = f
+	}
+
+	tplRaw, err := ioutil.ReadFile(cfg.Template)
+	if err != nil {
+		return err
+	}
+
+	tpl, err := template.New("output").Funcs(tplFuncs()).Parse(string(tplRaw))
+	if err != nil {
+		return err
+	}
+
+	return tpl.Execute(outFile, repo)
+}
+
+func getOutfile(repo *github.Repository) (string, error) {
+	tpl, err := template.New("outfile").Funcs(tplFuncs()).Parse(cfg.Output)
+	if err != nil {
+		return "", err
+	}
+	buf := new(bytes.Buffer)
+
+	err = tpl.Execute(buf, repo)
+	return buf.String(), err
+}
+
+func tplFuncs() template.FuncMap {
+	return template.FuncMap{
+		"chkPtrBool": func(i *bool) bool { return i != nil && *i },
+		"slugify":    slug.Make,
+	}
+}