feat(cmd): check if config exists in create cmd

* add replace flag to overwrite

Author: muthukrishnan24

cmd/callback.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"fmt"
+	"os"
 	"path/filepath"
 
 	"github.com/urfave/cli/v2"
@@ -46,9 +47,15 @@ func hookCreate(confPath string, isReplace bool) error {
 }
 
 // configCreate is the callback function for create config command
-func configCreate(onlyEnabled bool) error {
+func configCreate(onlyEnabled, isReplace bool) error {
 	defConf := config.GetDefaultConf(onlyEnabled)
 	outPath := filepath.Join(".", config.DefaultFile)
+	// if config file already exists skip creating or overwriting it
+	if _, err := os.Stat(outPath); !os.IsNotExist(err) {
+		if !isReplace {
+			return errConfigExist
+		}
+	}
 	return config.WriteConfToFile(outPath, defConf)
 }
 

cmd/cmd.go

@@ -104,10 +104,27 @@ func configCmd() *cli.Command {
 				Usage:   "writes only default enabled rules",
 				Value:   false,
 			},
+			&cli.BoolFlag{
+				Name:    "replace",
+				Aliases: []string{"r"},
+				Usage:   "Replace conf file if already exists",
+				Value:   false,
+			},
 		},
 		Action: func(ctx *cli.Context) error {
 			isOnlyEnabled := ctx.Bool("enabled")
-			return configCreate(isOnlyEnabled)
+			isReplace := ctx.Bool("replace")
+			err := configCreate(isOnlyEnabled, isReplace)
+			if err != nil {
+				if isConfExists(err) {
+					fmt.Println("config create failed")
+					fmt.Println("run with --replace to replace existing file")
+					return nil
+				}
+				return err
+			}
+			fmt.Println("config file created")
+			return nil
 		},
 	}
 

cmd/hook.go

@@ -14,6 +14,7 @@ const (
 )
 
 var errHooksExist = errors.New("hooks already exists")
+var errConfigExist = errors.New("config file already exists")
 
 func initHooks(confPath string, isGlobal, isReplace bool) (string, error) {
 	hookDir, err := getHookDir(hookBaseDir, isGlobal)
@@ -74,3 +75,7 @@ func getHookDir(baseDir string, isGlobal bool) (string, error) {
 func isHookExists(err error) bool {
 	return err == errHooksExist
 }
+
+func isConfExists(err error) bool {
+	return err == errConfigExist
+}