Simplify Entry.URLWithTrailingSlash implementation and usage

Signed-off-by: Dominik Braun <mail@dominikbraun.io>

cmd/helm/repo_add.go

@@ -160,14 +160,12 @@ func (o *repoAddOptions) run(out io.Writer) error {
 	// 2. When the config is different require --force-update
 	if !o.forceUpdate && f.Has(o.name) {
 		existing := f.Get(o.name)
-		if c != *existing {
-			// In case of of the repo URLs ends with a trailing slash and the other
-			// one doesn't, the config is considered to be different even though they
-			// refer to the same repository.
-			// Only fail with an error if the configs actually are different.
-			if c.URLWithTrailingSlash() != existing.URLWithTrailingSlash() {
-				return errors.Errorf("repository name (%s) already exists, please specify a different name", o.name)
-			}
+		// In case of of the repo URLs ends with a trailing slash and the other
+		// one doesn't, the config is considered to be different even though they
+		// refer to the same repository.
+		// Only fail with an error if the configs actually are different.
+		if c != *existing && c.URLWithTrailingSlash() != existing.URLWithTrailingSlash() {
+			return errors.Errorf("repository name (%s) already exists, please specify a different name", o.name)
 		}
 
 		// The add is idempotent so do nothing

pkg/repo/chartrepo.go

@@ -296,9 +296,5 @@ func (e *Entry) String() string {
 // URLWithTrailingSlash returns the repository URL with a trailing slash.
 // If the URL already ends with a slash, it will be returned unchanged.
 func (e *Entry) URLWithTrailingSlash() string {
-	if e.URL[len(e.URL)-1:] == "/" {
-		return e.URL
-	}
-
-	return e.URL + "/"
+	return strings.TrimSuffix(e.URL, "/") + "/"
 }