Add support for subpath releases

main.go

@@ -105,6 +105,7 @@ type highlightCategory struct {
 type release struct {
 	ProjectName     string             `toml:"project_name"`
 	GithubRepo      string             `toml:"github_repo"`
+	SubPath         string             `toml:"sub_path"`
 	Commit          string             `toml:"commit"`
 	Previous        string             `toml:"previous"`
 	PreRelease      bool               `toml:"pre_release"`
@@ -247,6 +248,10 @@ This tool should run from the root of the project repository for a new release.
 		}
 		logrus.Infof("Welcome to the %s release tool...", r.ProjectName)
 
+		if r.SubPath != "" {
+			gitSubpaths = append(gitSubpaths, r.SubPath)
+		}
+
 		mailmapPath, err := filepath.Abs(".mailmap")
 		if err != nil {
 			return fmt.Errorf("failed to resolve mailmap: %w", err)
@@ -289,13 +294,13 @@ This tool should run from the root of the project repository for a new release.
 		})
 
 		logrus.Infof("creating new release %s with %d new changes...", tag, len(changes))
-		current, err := parseDependencies(r.Commit)
+		current, err := parseDependencies(r.Commit, r.SubPath)
 		if err != nil {
 			return err
 		}
 		overrideDependencies(current, r.OverrideDeps)
 
-		previous, err := parseDependencies(r.Previous)
+		previous, err := parseDependencies(r.Previous, r.SubPath)
 		if err != nil {
 			return err
 		}

util.go

@@ -66,11 +66,22 @@ func parseTag(path string) string {
 	return strings.TrimSuffix(filepath.Base(path), ".toml")
 }
 
-func parseDependencies(commit string) ([]dependency, error) {
+func parseDependencies(commit, subpath string) ([]dependency, error) {
 	rd, err := fileFromRev(commit, vendorConf)
 	if err == nil {
 		return parseVendorConfDependencies(rd)
 	}
+	// Look for go module at subpath if provided
+	if subpath != "" {
+		rd, err = fileFromRev(commit, filepath.Join(subpath, modulesTxt))
+		if err == nil {
+			return parseModulesTxtDependencies(rd)
+		}
+		rd, err = fileFromRev(commit, filepath.Join(subpath, goMod))
+		if err == nil {
+			return parseGoModDependencies(rd)
+		}
+	}
 	rd, err = fileFromRev(commit, modulesTxt)
 	if err == nil {
 		return parseModulesTxtDependencies(rd)
@@ -451,13 +462,18 @@ func fileFromRev(rev, file string) (io.Reader, error) {
 }
 
 var gitConfigs = map[string]string{}
+var gitSubpaths = []string{}
 
 func git(args ...string) ([]byte, error) {
 	var gitArgs []string
 	for k, v := range gitConfigs {
 		gitArgs = append(gitArgs, "-c", fmt.Sprintf("%s=%s", k, v))
 	}
 	gitArgs = append(gitArgs, args...)
+	if len(gitSubpaths) > 0 && len(args) > 0 && args[0] == "log" {
+		gitArgs = append(gitArgs, "--show-pulls", "--")
+		gitArgs = append(gitArgs, gitSubpaths...)
+	}
 	o, err := exec.Command("git", gitArgs...).CombinedOutput()
 	if err != nil {
 		return nil, fmt.Errorf("%s: %s", err, o)