refactor: accept both write and diff

internal/cli/action.go

@@ -1,6 +1,8 @@
 package cli
 
 import (
+	"fmt"
+
 	"github.com/urfave/cli/v2"
 )
 
@@ -25,14 +27,14 @@ func (a *action) getFlags(c *cli.Context) {
 func (a *action) Run(c *cli.Context) error {
 	a.getFlags(c)
 
-	if !a.flags.write &&
+	// No flag is set
+	if !a.flags.list &&
+		!a.flags.write &&
 		!a.flags.diff {
-		if err := a.RunHelp(c); err != nil {
+		return a.RunHelp(c)
-			return err
-		}
-
-		return nil
 	}
 
+	fmt.Println(c.Args().Slice())
+
 	return nil
 }

internal/cli/app.go

@@ -16,12 +16,10 @@ const (
 	flagListUsage = "list files will be changed"
 
 	flagWriteName  = "write"
-	flagWriteUsage = "actually write changes to (source) files, conflicts with -d, only one of -w or -d can be used"
+	flagWriteUsage = "actually write changes to (source) files"
 
-	// If both write and diff is exist
-	// Choose diff
 	flagDiffName  = "diff"
-	flagDiffUsage = "show diff instead of writing changes"
+	flagDiffUsage = "show diff"
 )
 
 var (