Replace bash release helper scripts with Go progam

cmd/gorepomod/internal/repo/protomodule.go

@@ -0,0 +1,101 @@
+package repo
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"regexp"
+
+	"golang.org/x/mod/modfile"
+	"sigs.k8s.io/kustomize/cmd/gorepomod/internal/misc"
+	"sigs.k8s.io/kustomize/cmd/gorepomod/internal/utils"
+)
+
+const (
+	dotDir = "."
+)
+
+// protoModule holds parts being collected to represent a module.
+type protoModule struct {
+	pathToGoMod string
+	mf          *modfile.File
+}
+
+func (pm *protoModule) FullPath() string {
+	return pm.mf.Module.Mod.Path
+}
+
+func (pm *protoModule) PathToGoMod() string {
+	return pm.pathToGoMod
+}
+
+// Represents the trailing version label in a module name.
+// See https://blog.golang.org/v2-go-modules
+var trailingVersionPattern = regexp.MustCompile("/v\\d+$")
+
+func (pm *protoModule) ShortName(
+	repoImportPath string) misc.ModuleShortName {
+	fp := pm.FullPath()
+	if fp == repoImportPath {
+		return misc.ModuleAtTop
+	}
+	p := fp[len(repoImportPath)+1:]
+	stripped := trailingVersionPattern.ReplaceAllString(p, "")
+	return misc.ModuleShortName(stripped)
+}
+
+func loadProtoModules(
+	repoRoot string, exclusions []string) (result []*protoModule, err error) {
+	var paths []string
+	paths, err = getPathsToModules(repoRoot, exclusions)
+	if err != nil {
+		return
+	}
+	for _, p := range paths {
+		var pm *protoModule
+		pm, err = loadProtoModule(p)
+		if err != nil {
+			return
+		}
+		result = append(result, pm)
+	}
+	return
+}
+
+func loadProtoModule(path string) (*protoModule, error) {
+	mPath := filepath.Join(path, goModFile)
+	content, err := ioutil.ReadFile(mPath)
+	if err != nil {
+		return nil, fmt.Errorf("error reading %q: %v\n", mPath, err)
+	}
+	f, err := modfile.Parse(mPath, content, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &protoModule{pathToGoMod: path, mf: f}, nil
+}
+
+func getPathsToModules(
+	repoRoot string, exclusions []string) (result []string, err error) {
+	exclusionMap := utils.SliceToSet(exclusions)
+	err = filepath.Walk(
+		repoRoot,
+		func(path string, info os.FileInfo, err error) error {
+			if err != nil {
+				return fmt.Errorf("trouble at pathToGoMod %q: %v\n", path, err)
+			}
+			if info.IsDir() {
+				if _, ok := exclusionMap[info.Name()]; ok {
+					return filepath.SkipDir
+				}
+				return nil
+			}
+			if info.Name() == goModFile {
+				result = append(result, path[:len(path)-len(goModFile)-1])
+				return filepath.SkipDir
+			}
+			return nil
+		})
+	return
+}