fix: maybe more robust gitignore checks

pkg/git/read.go

@@ -51,7 +51,10 @@ func IsClean(recipeName string) (bool, error) {
 	if err != nil {
 		return false, err
 	}
-	worktree.Excludes = append(patterns, worktree.Excludes...)
+
+	if len(patterns) > 0 {
+		worktree.Excludes = append(patterns, worktree.Excludes...)
+	}
 
 	status, err := worktree.Status()
 	if err != nil {
@@ -95,9 +98,12 @@ func parseGitConfig() (*gitConfigPkg.Config, error) {
 	}
 
 	globalGitConfig := filepath.Join(usr.HomeDir, ".gitconfig")
-	if _, err := os.Stat(globalGitConfig); os.IsNotExist(err) {
-		logrus.Debugf("no %s exists, not reading any global git ignore config", globalGitConfig)
-		return cfg, nil
+	if _, err := os.Stat(globalGitConfig); err != nil {
+		if os.IsNotExist(err) {
+			logrus.Debugf("no %s exists, not reading any global git ignore config", globalGitConfig)
+			return cfg, nil
+		}
+		return cfg, err
 	}
 
 	b, err := ioutil.ReadFile(globalGitConfig)
@@ -126,17 +132,26 @@ func getExcludesFile(cfg *gitConfigPkg.Config) string {
 }
 
 func parseExcludesFile(excludesfile string) ([]gitignore.Pattern, error) {
+	var ps []gitignore.Pattern
+
 	excludesfile, err := expandTilde(excludesfile)
 	if err != nil {
 		return nil, err
 	}
 
+	if _, err := os.Stat(excludesfile); err != nil {
+		if os.IsNotExist(err) {
+			logrus.Debugf("no %s exists, skipping reading ignore paths", excludesfile)
+			return ps, nil
+		}
+		return ps, err
+	}
+
 	data, err := ioutil.ReadFile(excludesfile)
 	if err != nil {
 		return nil, err
 	}
 
-	var ps []gitignore.Pattern
 	for _, s := range strings.Split(string(data), "\n") {
 		if !strings.HasPrefix(s, "#") && len(strings.TrimSpace(s)) > 0 {
 			ps = append(ps, gitignore.ParsePattern(s, nil))
@@ -150,11 +165,13 @@ func expandTilde(path string) (string, error) {
 	if !strings.HasPrefix(path, "~") {
 		return path, nil
 	}
+
 	var paths []string
 	u, err := user.Current()
 	if err != nil {
 		return "", err
 	}
+
 	for _, p := range strings.Split(path, string(filepath.Separator)) {
 		if p == "~" {
 			paths = append(paths, u.HomeDir)
@@ -162,5 +179,6 @@ func expandTilde(path string) (string, error) {
 			paths = append(paths, p)
 		}
 	}
+
 	return "/" + filepath.Join(paths...), nil
 }