mv into func

main.go

@@ -56,20 +56,7 @@ func Main(ctx context.Context) error {
 
 	mvNLn := RealMvNLn
 	if *dry {
-		outd := map[string]struct{}{}
+		mvNLn = DryMvNLn()
-		mvNLn = func(outf, inf string) error {
-			if _, err := os.Stat(outf); err == nil {
-				return nil
-			}
-
-			if _, ok := outd[outf]; ok {
-				return nil
-			}
-			outd[outf] = struct{}{}
-
-			fmt.Fprintf(os.Stderr, "mv %q %q\n", inf, outf)
-			return nil
-		}
 	}
 
 	return Run(ctx,
@@ -151,3 +138,20 @@ func RealMvNLn(outf, inf string) error {
 	}
 	return os.Symlink(outf, inf)
 }
+
+func DryMvNLn() func(string, string) error {
+	outd := map[string]struct{}{}
+	return func(outf, inf string) error {
+		if _, err := os.Stat(outf); err == nil {
+			return nil
+		}
+
+		if _, ok := outd[outf]; ok {
+			return nil
+		}
+		outd[outf] = struct{}{}
+
+		fmt.Fprintf(os.Stderr, "mv %q %q\n", inf, outf)
+		return nil
+	}
+}