feat: onboarding to get forgejo url

internal/cli/cli.go

@@ -2,6 +2,7 @@ package cli
 
 import (
 	"flag"
+	"fmt"
 
 	"git.juancwu.dev/juancwu/forgejo-cli/internal/config"
 )
@@ -10,10 +11,36 @@ func Run() error {
 	var configPath string
 	flag.StringVar(&configPath, "config", "", "Configuration file path")
 
-	_, err := config.Load(configPath)
+	cfg, err := config.Load(configPath)
 	if err != nil {
 		return err
 	}
 
+	if cfg.ForgejoInstanceURL == "" {
+		err := onboard(cfg)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// onboard asks the user for the Forgejo instance URL and save it to the config file.
+func onboard(cfg *config.Config) error {
+	var url string
+
+	fmt.Print("Enter Forgejo instance URL: ")
+	_, err := fmt.Scanln(&url)
+	if err != nil {
+		return fmt.Errorf("failed to read url: %w", err)
+	}
+
+	cfg.ForgejoInstanceURL = url
+	err = cfg.Save("")
+	if err != nil {
+		return fmt.Errorf("failed to save config: %w", err)
+	}
+
 	return nil
 }