release decs with go version

release/release.go

@@ -10,6 +10,7 @@ import (
 	"github.com/goreleaser/releaser/config"
 	"github.com/goreleaser/releaser/uname"
 	"golang.org/x/oauth2"
+	"os/exec"
 )
 
 func Release(version, diff string, config config.ProjectConfig) error {
@@ -22,14 +23,12 @@ func Release(version, diff string, config config.ProjectConfig) error {
 
 	owner := strings.Split(config.Repo, "/")[0]
 	repo := strings.Split(config.Repo, "/")[1]
-
-	// TODO update release if it already exists
-	// TODO add `go version` to the description
-	r, _, err := client.Repositories.CreateRelease(owner, repo, &github.RepositoryRelease{
+	releaseData := &github.RepositoryRelease{
 		Name:            github.String(version),
 		TagName:         github.String(version),
-		Body:            github.String(diff + "\n\nAutomated with @goreleaser"),
-	})
+		Body:            github.String(description(diff)),
+	}
+	r, _, err := client.Repositories.CreateRelease(owner, repo, releaseData)
 	if err != nil {
 		return err
 	}
@@ -43,6 +42,16 @@ func Release(version, diff string, config config.ProjectConfig) error {
 	return nil
 }
 
+func description(diff string) string {
+	result := diff + "\n\nAutomated with @goreleaser"
+	cmd := exec.Command("go", "version")
+	bts, err := cmd.CombinedOutput()
+	if err != nil {
+		return result
+	}
+	return result + "\nBuilt with " + string(bts)
+}
+
 func upload(client *github.Client, releaseID int, owner, repo, system, arch, binaryName string) error {
 	name := binaryName + "_" + uname.FromGo(system) + "_" + uname.FromGo(arch) + ".tar.gz"
 	file, err := os.Open("dist/" + name)

release/release_test.go

@@ -0,0 +1,16 @@
+package release
+
+import (
+	"testing"
+	"github.com/stretchr/testify/assert"
+	"fmt"
+)
+
+func TestDescription(t *testing.T) {
+	assert := assert.New(t)
+	desc := description("0abf342 some message")
+	assert.Contains(desc, "0abf342 some message")
+	assert.Contains(desc, "Automated with @goreleaser")
+	assert.Contains(desc, "go version go1.")
+	fmt.Println(desc)
+}