Add commandline options

agent.go

@@ -6,6 +6,7 @@ import (
 	"path"
 
 	"github.com/fsnotify/fsnotify"
+	"github.com/mkideal/cli"
 )
 
 func stop() {
@@ -21,7 +22,7 @@ func waitAndExecuteCommandsFromDevice() {
 	// TODO: Wait for action loop ...
 }
 
-func watchForConfigChanges() {
+func watchForConfigChanges(configFile string) {
 	watcher, err := fsnotify.NewWatcher()
 	if err != nil {
 		log.Fatal(err)
@@ -48,32 +49,48 @@ func watchForConfigChanges() {
 
 				if event.Op&fsnotify.Rename == fsnotify.Rename ||
 					event.Op&fsnotify.Remove == fsnotify.Remove {
-					log.Println("The 'keymap.conf' configuration file is renamed or removed. We cant do any further changes without the config file. So create the file or rename it back and restart the agent.")
+					log.Println("The configuration file is renamed or removed. We cant do any further changes without the config file. So create the file or rename it back and restart the agent.")
 					stop()
 				}
 			case err := <-watcher.Errors:
-				log.Println("We have the following problem with the 'keymap.conf' configuration file: ", err)
+				log.Println("We have the following problem with the configuration file: ", err)
 				log.Println("Try the fix this problem by yourself and restart the agent.")
 				stop()
 			}
 		}
 	}()
 
-	// The configuration file need to be in the same directory as the binary.
+	err = watcher.Add(configFile)
-	// Later on, we can add other paths, where the file can be placed (like as a
-	// dotfile in the home directory or in the .config/n3rdpad/ folder or other
-	// places where windows will put it).
-	config_path, err := os.Getwd()
-	config_file := path.Join(config_path, "keymap.conf")
-	err = watcher.Add(config_file)
 	if err != nil {
-		log.Fatal("Can't find the 'keymap.conf' configuration file. Please create one.")
+		log.Fatal("Can't find the configuration file. Please create one.")
 	}
 	<-done
 }
 
+type argT struct {
+	cli.Helper
+	ConfigFile string `cli:"c,config" usage:"specify a keymap config file"`
+}
+
 func main() {
-	watchForConfigChanges()
+	configPath, _ := os.Getwd()
+	configFile := path.Join(configPath, "keymap.conf")
+
+	cli.Run(&argT{}, func(ctx *cli.Context) error {
+		args := ctx.Argv().(*argT)
+		if args.ConfigFile != "" {
+			configFile = args.ConfigFile
+		}
+
+		if !args.Help {
+			// Start up the application
+			log.Println("Using the configuration file", configFile)
+			watchForConfigChanges(configFile)
 			waitAndExecuteCommandsFromDevice()
+
 			stop()
 		}
+
+		return nil
+	})
+}