feat(cmd): add changelog flag for saving the generated changelog

Author: christophwitzko

cmd/semantic-release/main.go

@@ -44,6 +44,7 @@ func loadConfig() *SemRelConfig {
 func main() {
 	token := flag.String("token", os.Getenv("GITHUB_TOKEN"), "github token")
 	slug := flag.String("slug", os.Getenv("TRAVIS_REPO_SLUG"), "slug of the repository")
+	changelogFile := flag.String("changelog", "", "creates a changelog file")
 	ghr := flag.Bool("ghr", false, "create a .ghr file with the parameters for ghr")
 	noci := flag.Bool("noci", false, "run semantic-release locally")
 	dry := flag.Bool("dry", false, "do not create release")
@@ -124,8 +125,14 @@ func main() {
 		exitIfError(errors.New("DRY RUN: no release was created"))
 	}
 
+	logger.Println("generating changelog...")
+	changelog := semrel.GetChangelog(commits, release, newVer)
+	if *changelogFile != "" {
+		exitIfError(ioutil.WriteFile(*changelogFile, []byte(changelog), 0644))
+	}
+
 	logger.Println("creating release...")
-	exitIfError(repo.CreateRelease(commits, release, newVer, currentBranch))
+	exitIfError(repo.CreateRelease(changelog, newVer, currentBranch))
 
 	if *ghr {
 		exitIfError(ioutil.WriteFile(".ghr", []byte(fmt.Sprintf("-u %s -r %s v%s", repo.Owner, repo.Repo, newVer.String())), 0644))

semrel.go

@@ -181,9 +181,8 @@ func (repo *Repository) GetLatestRelease(vrange string) (*Release, error) {
 	return &Release{lastRelease.SHA, &npver}, nil
 }
 
-func (repo *Repository) CreateRelease(commits []*Commit, latestRelease *Release, newVersion *semver.Version, branch string) error {
+func (repo *Repository) CreateRelease(changelog string, newVersion *semver.Version, branch string) error {
 	tag := fmt.Sprintf("v%s", newVersion.String())
-	changelog := GetChangelog(commits, latestRelease, newVersion)
 	hasPrerelease := newVersion.Prerelease() != ""
 	opts := &github.RepositoryRelease{
 		TagName:         &tag,

semrel_test.go

@@ -176,7 +176,7 @@ func TestCreateRelease(t *testing.T) {
 	repo, ts := getNewTestRepo(t)
 	defer ts.Close()
 	newVersion, _ := semver.NewVersion("2.0.0")
-	err := repo.CreateRelease([]*Commit{}, &Release{}, newVersion, "")
+	err := repo.CreateRelease("", newVersion, "")
 	if err != nil {
 		t.Fatal(err)
 	}