Make into reuseable package

go.mod

@@ -1,4 +1,4 @@
-module github.com/shu-go/vvin
+module git.bigun.dev/evan/vvin
 
 go 1.13
 

vvin.go

@@ -8,22 +8,12 @@ import (
 	"strconv"
 	"strings"
 	"syscall"
-	"time"
 	"unsafe"
 
 	"github.com/mitchellh/go-ps"
 	"github.com/shu-go/gli"
 )
 
-// Version is app version
-var Version string
-
-func init() {
-	if Version == "" {
-		Version = "dev-" + time.Now().Format("20060102")
-	}
-}
-
 type globalCmd struct {
 	Target string `cli:"target,t=WINDOW_TITLE" help:"default to current window"`
 	Debug  bool   `help:"output debug info"`
@@ -61,17 +51,15 @@ func (c *globalCmd) Before() error {
 	return nil
 }
 
-func main() {
+func Start([]string) error {
 	app := gli.NewWith(&globalCmd{})
 	app.Name = "vvin"
 	app.Desc = "Change window properties for Windows"
-	app.Version = Version
+	app.Version = "0.7.0"
 	app.Usage = ``
 	app.Copyright = "(C) 2019 Shuhei Kubota"
 	app.SuppressErrorOutput = true
-	if err := app.Run(os.Args); err != nil {
-		fmt.Fprintln(os.Stderr, err)
-	}
+	return app.Run(os.Args)
 }
 
 var (