[fix] fixing no git error details issue

CHANGELOG.md

@@ -1,3 +1,8 @@
+# 1.2.0 (2022/01/27)
+
+### Bug Fixes
+- fixing no git error details issue
+
 # 1.1.0 (2022/01/17)
 
 ### Features

git.go

@@ -8,14 +8,18 @@ import (
 
 func git(dir string, args ...string) (string, error) {
 	cmd := exec.Command("git", args...)
-	var out bytes.Buffer
-	cmd.Stdout = &out
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
 	cmd.Dir = dir
 	if *verbose {
 		fmt.Println(cmd.String())
 	}
-	err := cmd.Run()
-	return out.String(), err
+	if err := cmd.Run(); err != nil {
+		return "", fmt.Errorf(stderr.String())
+	}
+	return stdout.String(), nil
 }
 
 // fetchGitRepository will fetch latest commits and tags

main.go

@@ -30,12 +30,14 @@ func main() {
 	flag.Parse()
 	if *fetch {
 		if err := fetchGitRepository(); err != nil {
-			panic(err)
+			fmt.Println(err)
+			return
 		}
 	}
 	gittags, err := getGitTags()
 	if err != nil {
-		panic(err)
+		fmt.Println(err)
+		return
 	}
 	if *verbose {
 		fmt.Println(gittags)
@@ -128,6 +130,7 @@ func main() {
 		}
 	}
 	if err := ioutil.WriteFile(*output, buf.Bytes(), os.ModePerm); err != nil {
-		panic(err)
+		fmt.Println(err)
+		return
 	}
 }