brew release

brew/brew.go

@@ -0,0 +1,97 @@
+package brew
+
+import (
+	"bytes"
+	"context"
+	"crypto/sha256"
+	"fmt"
+	"strings"
+
+	"github.com/alecthomas/template"
+	"github.com/google/go-github/github"
+	"github.com/goreleaser/releaser/config"
+	"golang.org/x/oauth2"
+)
+
+const formulae = `class {{ .Name }} < Formula
+  desc "{{ .Desc }}"
+  homepage "{{ .Homepage }}"
+  url "https://github.com/{{ .Repo }}/releases/download/{{ .Tag }}/{{ .BinaryName }}_Darwin_x86_64.tar.gz"
+  head "https://github.com/{{ .Repo }}.git"
+
+  def install
+    bin.install "{{ .BinaryName }}"
+  end
+end
+`
+
+type templateData struct {
+	Name, Desc, Homepage, Repo, Tag, BinaryName string
+}
+
+func Brew(version string, config config.ProjectConfig) error {
+	fmt.Println("Updating brew formulae...")
+	ts := oauth2.StaticTokenSource(
+		&oauth2.Token{AccessToken: config.Token},
+	)
+	tc := oauth2.NewClient(context.Background(), ts)
+	client := github.NewClient(tc)
+	parts := strings.Split(config.Brew.Repo, "/")
+
+	tmpl, err := template.New(config.BinaryName).Parse(formulae)
+	if err != nil {
+		return err
+	}
+
+	data, err := dataFor(version, config, client)
+	if err != nil {
+		return err
+	}
+
+	var out bytes.Buffer
+	tmpl.Execute(&out, data)
+
+	_, _, err = client.Repositories.UpdateFile(
+		parts[0],
+		parts[1],
+		config.BinaryName+".rb",
+		&github.RepositoryContentFileOptions{
+			Committer: &github.CommitAuthor{
+				Name:  github.String("goreleaserbot"),
+				Email: github.String("bot@goreleaser"),
+			},
+			Content: out.Bytes(),
+			Message: github.String(config.BinaryName + " version " + version),
+			SHA:     github.String(fmt.Sprintf("%s", sha256.Sum256(out.Bytes()))),
+		},
+	)
+	return err
+}
+
+func dataFor(version string, config config.ProjectConfig, client *github.Client) (result templateData, err error) {
+	var homepage string
+	var description string
+	parts := strings.Split(config.Repo, "/")
+	rep, _, err := client.Repositories.Get(parts[0], parts[1])
+	if err != nil {
+		return result, err
+	}
+	if rep.Homepage == nil {
+		homepage = *rep.HTMLURL
+	} else {
+		homepage = *rep.Homepage
+	}
+	if rep.Description == nil {
+		description = "TODO"
+	} else {
+		description = *rep.Description
+	}
+	return templateData{
+		Name:       strings.Title(config.BinaryName),
+		Desc:       description,
+		Homepage:   homepage,
+		Repo:       config.Repo,
+		Tag:        version,
+		BinaryName: config.BinaryName,
+	}, err
+}

main.go

@@ -4,10 +4,11 @@ import (
 	"fmt"
 	"log"
 
+	"github.com/goreleaser/releaser/brew"
 	"github.com/goreleaser/releaser/build"
+	"github.com/goreleaser/releaser/compress"
 	"github.com/goreleaser/releaser/config"
 	"github.com/goreleaser/releaser/git"
-	"github.com/goreleaser/releaser/compress"
 	"github.com/goreleaser/releaser/release"
 )
 
@@ -41,9 +42,11 @@ func main() {
 	}
 	err = release.Release(tag, diff, config)
 	if err != nil {
-		log.Fatalln("Failed to create the GitHub release", err.Error())
+		log.Fatalln("Failed to create GitHub release", err.Error())
 	}
 	if config.Brew.Repo != "" {
-		// release to brew
+		if err := brew.Brew(tag, config); err != nil {
+			log.Fatalln("Failed to create homebrew formula", err.Error())
+		}
 	}
 }