fix: 🐛 only parse flags if available

main.go

@@ -11,23 +11,47 @@ import (
 	flag "github.com/spf13/pflag"
 )
 
-func main() {
-	logrus.SetFormatter(new(formatter))
-
-	var args plugin.Args
+var args plugin.Args
 
+func init() {
 	if err := envconfig.Process("", &args); err != nil {
 		logrus.Fatalln(err)
 	}
 
-	flag.StringVar(&args.TitleFormat, "title-format", "", "Format to use for the release title")
-	flag.StringVar(&args.TagFile, "tag-file", "", "File to check for tag to release")
-	flag.StringVar(&args.TagRegex, "tag-regex", "", "Regex pattern to look for tag in tag-file")
-	flag.StringVar(&args.Notes, "notes", "", "Notes to use in release")
-	flag.StringVar(&args.NotesFile, "notes-file", "", "File to use for release notes")
+	var (
+		titleFormat *string = flag.String("title-format", "", "Format to use for the release title")
+		tagFile     *string = flag.String("tag-file", "", "File to check for tag to release")
+		tagRegex    *string = flag.String("tag-regex", "", "Regex pattern to look for tag in tag-file")
+		notes       *string = flag.String("notes", "", "Notes to use in release")
+		notesFile   *string = flag.String("notes-file", "", "File to use for release notes")
+	)
 
 	flag.Parse()
 
+	if titleFormat != nil && *titleFormat != "" {
+		args.TitleFormat = *titleFormat
+	}
+
+	if tagFile != nil && *tagFile != "" {
+		args.TagFile = *tagFile
+	}
+
+	if tagRegex != nil && *tagRegex != "" {
+		args.TagRegex = *tagRegex
+	}
+
+	if notes != nil && *notes != "" {
+		args.Notes = *notes
+	}
+
+	if notesFile != nil && *notesFile != "" {
+		args.NotesFile = *notesFile
+	}
+}
+
+func main() {
+	logrus.SetFormatter(new(formatter))
+
 	switch args.Level {
 	case "debug":
 		logrus.SetFormatter(textFormatter)