fix: check isInGitDir instead of stderr msg

stderr is not reliable due to other LOCALEs

closes #62

main.go

@@ -175,12 +175,12 @@ func main() {
 		util.ErrMsg("color reset", err)
 	}
 
-	gitRepo, stderr, err := git.RevParse()
+	gitRepo, _, err := git.RevParse()
 	if err != nil {
 		switch {
 		case strings.Contains(err.Error(), exec.ErrNotFound.Error()):
 			util.ErrMsg("rev parse", err)
-		case strings.Contains(string(stderr), "not a git repository"):
+		case gitRepo.IsInGitDir == nil:
 			os.Exit(0)
 		default:
 			// allow other errors to pass through, the git repo may not have upstream

pkg/git/git.go

@@ -191,7 +191,8 @@ func RevParse() (*GitRepo, []byte, error) {
 		resultLen := len(result)
 		if resultLen == 5 || resultLen == 6 {
 			g.GitDir = result[0]
-			g.IsInGitDir, _ = strconv.ParseBool(result[1])
+			isInGitDir, _ := strconv.ParseBool(result[1])
+			g.IsInGitDir = &isInGitDir
 			g.IsInWorkTree, _ = strconv.ParseBool(result[2])
 			g.IsInBareRepo, _ = strconv.ParseBool(result[3])
 			g.IsInShallowRepo, _ = strconv.ParseBool(result[4])

pkg/git/repo.go

@@ -13,7 +13,7 @@ import (
 
 type GitRepo struct {
 	GitDir                     string
-	IsInGitDir                 bool
+	IsInGitDir                 *bool // pointer is used during checks if in a git repo
 	IsInWorkTree               bool
 	IsInBareRepo               bool
 	IsInShallowRepo            bool
@@ -155,7 +155,7 @@ func (g *GitRepo) BranchInfo(cfg config.GitPromptStringConfig) (string, error) {
 		}
 	}
 
-	if g.IsInGitDir {
+	if *g.IsInGitDir {
 		if g.IsInBareRepo {
 			g.PromptBareRepoStatus = "BARE:"
 		} else {
@@ -201,7 +201,7 @@ func (g *GitRepo) BranchStatus(cfg config.GitPromptStringConfig) (string, string
 	status := ""
 	statusColor := ""
 
-	if g.IsInBareRepo || g.IsInGitDir {
+	if g.IsInBareRepo || *g.IsInGitDir {
 		return status, cfg.ColorNoUpstream, nil
 	}