Treat 2nd arg as a keyword to search content (same as --grep option)

README.md

@@ -1,29 +1,63 @@
 # xfg
 
-Do `find` paths by a keyword, and also search for contents like a `grep` in one command.
+Do `find` paths by a keyword, and also search for contents like a `grep` in one command, gracefully.
 
 <a href="/~https://github.com/bayashi/xfg/actions" title="xfg CI"><img src="/~https://github.com/bayashi/xfg/workflows/main/badge.svg" alt="xfg CI"></a>
 <a href="https://goreportcard.com/report/github.com/bayashi/xfg" title="xfg report card" target="_blank"><img src="https://goreportcard.com/badge/github.com/bayashi/xfg" alt="xfg report card"></a>
 <a href="https://pkg.go.dev/github.com/bayashi/xfg" title="Go xfg package reference" target="_blank"><img src="https://pkg.go.dev/badge/github.com/bayashi/xfg.svg" alt="Go Reference: xfg"></a>
 
 ## Usage of `xfg` command
 
-Search for directories and files that include `service-a` in those path.
+For example, there are directories and files like below:
 
-```go
-$ xfg service-a
 ```
+.
+├── service-a
+│   └── main.go
+├── service-b
+│   └── main.go
+└── service-c
+    └── main.go
+```
+
+Search for directories and files that include `service-b` in those path.
+
+```sh
+$ xfg service-b
+```
+
+Specific:
+
+```sh
+$ xfg --path service-b
+```
+
+Output:
 
-Search for directories and files that match the `service-a` in those path and extract content that matches the `memory`.
+```
+$ xfg service-b
+service-b
+service-b/main.go
+```
+
+Search for directories and files that match the `service-b` in those path and extract content that matches the `bar`.
+
+```sh
+$ xfg service-b bar
+```
+
+Specific:
 
-```go
-$ xfg service-a --grep memory
+```
+$ xfg --path service-b --grep bar
 ```
 
-`xfg` is the shorthand and enhancement of below one-liner.
+Output:
 
-```go
-find . -type f | grep "service-a" | xargs grep "memory" -n
+```
+service-b
+service-b/main.go
+  4:    bar := 34
 ```
 
 ## Notes

arg.go

@@ -71,14 +71,15 @@ func (o *options) targetPathFromArgs(cli *runner) {
 		cli.putHelp(errNeedToSetPath)
 	}
 
-	arg := flag.Args()[0]
-	if arg != "-" && arg != "--" {
-		o.searchPath = arg
-	}
+	o.searchPath = flag.Args()[0]
 
 	if o.searchPath == "" {
 		cli.putHelp(errNeedToSetPath)
 	}
+
+	if len(flag.Args()) == 2 {
+		o.searchGrep = flag.Args()[1]
+	}
 }
 
 func versionDetails() string {

cmd.go

@@ -21,7 +21,7 @@ func (cli *runner) putErr(message ...interface{}) {
 }
 
 func (cli *runner) putUsage() {
-	cli.putErr(fmt.Sprintf("Usage: %s [OPTIONS]", cmdName))
+	cli.putErr(fmt.Sprintf("Usage: %s [SEARCH_PATH_KEYWORD] [SEARCH_CONTENT_KEYWORD] [OPTIONS]", cmdName))
 }
 
 func (cli *runner) putHelp(message string) {