fix: README

README.md

@@ -17,8 +17,42 @@ usage: gmfs [OPTION] [GO_FILES]
 	  Set int convert type, only allow [32,64]. (default 64)
   -r string
 	  Regexp match struct name. (default ".*")
+  -f string
+	  Specifies files(separate multiple values with spaces).
   -v,--version		Show version info and exit.
 ```
-If under macOS copy struct name and run `gmfs -s=$(pbpaste) $(ls | grep ".go") | pbcopy` at go file path will copy the result to clipboard.
 
-![aa](gmfs.gif)
+```bash
+echo '// Item Comment 1
+/*
+        Item Comment 1
+*/
+// Item Comment 1
+type Item struct {
+        // Item ItemId Comment 3
+
+        // Item ItemId Comment 2
+        ItemId    int // Item ItemId Comment 1
+        Name      string
+        Duration  time.Duration
+        CreatedAt time.Time
+}' | gmfs
+
+// Item Comment 1
+/*
+	Item Comment 1
+*/
+// Item Comment 1
+message Item {
+	// Item ItemId Comment 1
+	int64 item_id = 1;
+
+	string name = 2;
+
+	Duration duration = 3;
+
+	google.protobuf.Timestamp created_at = 4;
+}
+```
+
+If under macOS copy struct name and run `gmfs -r="UserInfo" -f="user.go" | pbcopy` at go file path will copy the result to clipboard.