Add --init flag to create a new Taskfile

cmd/task/task.go

@@ -25,6 +25,7 @@ hello:
 `)
 		pflag.PrintDefaults()
 	}
+	pflag.BoolVarP(&task.Init, "init", "i", false, "creates a new Taskfile.yml in the current folder")
 	pflag.BoolVarP(&task.Force, "force", "f", false, "forces execution even when the task is up-to-date")
 	pflag.BoolVarP(&task.Watch, "watch", "w", false, "enables watch of the given task")
 	pflag.Parse()

errors.go

@@ -9,7 +9,7 @@ type taskFileNotFound struct {
 }
 
 func (err taskFileNotFound) Error() string {
-	return fmt.Sprintf(`task: No task file found (is it named "%s"?)`, err.taskFile)
+	return fmt.Sprintf(`task: No task file found (is it named "%s"?). Use "task --init" to create a new one`, err.taskFile)
 }
 
 type taskNotFoundError struct {

init.go

@@ -0,0 +1,29 @@
+package task
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+)
+
+const defaultTaskfile = `# github.com/go-task/task
+
+default:
+  cmds:
+    - echo "Hello, World!"
+`
+
+func initTaskfile() {
+	for _, f := range []string{"Taskfile.yml", "Taskfile.toml", "Taskfile.json"} {
+		if _, err := os.Stat(f); err == nil {
+			log.Printf("A Taskfile already exists")
+			os.Exit(1)
+			return
+		}
+	}
+
+	if err := ioutil.WriteFile("Taskfile.yml", []byte(defaultTaskfile), 0666); err != nil {
+		log.Fatalf("%v", err)
+	}
+	log.Printf("Taskfile.yml created in the current directory")
+}

task.go

@@ -18,6 +18,8 @@ var (
 	// TaskFilePath is the default Taskfile
 	TaskFilePath = "Taskfile"
 
+	// Init (--init or -f flag) creates a Taskfile.yml in the current folder if not exists
+	Init bool
 	// Force (--force or -f flag) forces a task to run even when it's up-to-date
 	Force bool
 	// Watch (--watch or -w flag) enables watch of a task
@@ -46,6 +48,12 @@ func Run() {
 	log.SetFlags(0)
 
 	args := pflag.Args()
+
+	if Init {
+		initTaskfile()
+		return
+	}
+
 	if len(args) == 0 {
 		log.Println("task: No argument given, trying default task")
 		args = []string{"default"}

task_test.go

@@ -144,3 +144,22 @@ func TestStatus(t *testing.T) {
 		t.Errorf("Wrong output message: %s", buff.String())
 	}
 }
+
+func TestInit(t *testing.T) {
+	const dir = "testdata/init"
+	var file = filepath.Join(dir, "Taskfile.yml")
+
+	_ = os.Remove(file)
+	if _, err := os.Stat(file); err == nil {
+		t.Errorf("Taskfile.yml should not exists")
+	}
+
+	c := exec.Command("task", "--init")
+	c.Dir = dir
+	if err := c.Run(); err != nil {
+		t.Error(err)
+	}
+	if _, err := os.Stat(file); err != nil {
+		t.Errorf("Taskfile.yml should exists")
+	}
+}

testdata/init/.gitignore

@@ -0,0 +1 @@
+*.yml