Merge pull request #330 from danquah/print-usage

Have the --help/-h flag print usage.

Author: andreynering

cmd/task/task.go

@@ -50,6 +50,7 @@ func main() {
 
 	var (
 		versionFlag bool
+		helpFlag    bool
 		init        bool
 		list        bool
 		status      bool
@@ -66,6 +67,7 @@ func main() {
 	)
 
 	pflag.BoolVar(&versionFlag, "version", false, "show Task version")
+	pflag.BoolVarP(&helpFlag, "help", "h", false, "shows Task usage")
 	pflag.BoolVarP(&init, "init", "i", false, "creates a new Taskfile.yml in the current folder")
 	pflag.BoolVarP(&list, "list", "l", false, "lists tasks with description of current Taskfile")
 	pflag.BoolVar(&status, "status", false, "exits with non-zero exit code if any of the given tasks is not up-to-date")
@@ -86,6 +88,11 @@ func main() {
 		return
 	}
 
+	if helpFlag {
+		pflag.Usage()
+		return
+	}
+
 	if init {
 		wd, err := os.Getwd()
 		if err != nil {