added field clean bool for cleaning before checkout

checkout-go/action.yml

@@ -26,6 +26,10 @@ inputs:
     description: 'Number of commits to fetch. 0 indicates all history for all branches and tags.'
     required: false
     default: 1
+  clean:
+    description: 'Whether to execute `git clean -ffdx && git reset --hard HEAD` before fetching'
+    required: false
+    default: true
 
 runs:
   using: 'go'

checkout-go/main.go

@@ -16,8 +16,11 @@ type Config struct {
 	ServerURL    string
 	CheckoutType CheckoutType
 	FetchDepth   string
+	Clean        bool
 }
 
+// todo lfs
+
 type CheckoutType string
 
 const (
@@ -30,6 +33,14 @@ func getConfig() Config {
 	if fetchDepth == "" || fetchDepth == "0" {
 		fetchDepth = "1"
 	}
+
+	clean := os.Getenv("INPUT_CLEAN")
+	cleanBool := true
+
+	if clean == "0" || clean == "false" || clean == "f" {
+		cleanBool = false
+	}
+
 	return Config{
 		Repository:   os.Getenv("INPUT_REPOSITORY"),
 		Ref:          os.Getenv("INPUT_REF"),
@@ -38,6 +49,7 @@ func getConfig() Config {
 		ServerURL:    os.Getenv("INPUT_SERVERURL"),
 		CheckoutType: CheckoutType(os.Getenv("INPUT_CHECKOUTTYPE")),
 		FetchDepth:   fetchDepth,
+		Clean:        cleanBool,
 	}
 }
 
@@ -57,6 +69,15 @@ func main() {
 		log.Fatal("field serverURL is required")
 	}
 
+	if cfg.Clean {
+		if _, err := os.Stat(cfg.Path); err == nil {
+			run("git", "-C", cfg.Path, "clean", "-ffdx")
+			run("git", "-C", cfg.Path, "reset", "--hard", "HEAD")
+		} else {
+			log.Println(fmt.Sprintf("not path-%s directory for cleaning", cfg.Path))
+		}
+	}
+
 	cloneURL := cfg.CheckoutType.GenerateCloneURL(cfg)
 
 	fmt.Println("Cloning", cloneURL, "into", cfg.Path)
@@ -70,6 +91,7 @@ func main() {
 }
 
 func run(name string, args ...string) {
+	fmt.Println("git command: ", name, strings.Join(args, " "))
 	cmd := exec.Command(name, args...)
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr