Go cli script used to create go package or domain go package with mvc sub-packages

domc.go

package main

import (
	"flag"
	"fmt"
	"io/ioutil"
	"os"
	"strings"
)

type PackageType int

const (
	PackageModule = PackageType(iota)
	PackageTest
)

var (
	dry    = true
	domain = false
)

func makePackageFolder(dest string) {
	fmt.Printf("dir:     %s\n", dest)
	if !dry {
		err := os.Mkdir(dest, os.ModeDir)
		if err != nil {
			fmt.Printf("error: %v\n", err)
		}
	}
}

func getFileName(path string) string {
	pathParts := strings.Split(strings.Trim(path, "/"), "/")
	return pathParts[len(pathParts)-1]
}

func makePackage(dest string, packageType PackageType) {
	packageName := getFileName(dest)
	switch packageType {
	case PackageTest:
		packageName += "_test"
	}
	path := fmt.Sprintf("%v/%v.go", dest, packageName)
	fmt.Printf("package: %s\n", path)
	if !dry {
		err := ioutil.WriteFile(path, []byte(fmt.Sprintf("package %v\n", packageName)), 0755)
		if err != nil {
			fmt.Printf("error: %v\n", err)
		}
	}
}

func init() {
	flag.BoolVar(&dry, "dry", false, "dry run will not create any files or folders")
	flag.BoolVar(&domain, "domain", false, "domain will create not only package but MVC domain")
}

func main() {
	flag.Parse()
	for _, dest := range flag.Args() {
		_, err := os.Stat(dest)
		if os.IsNotExist(err) || dry {
			makePackageFolder(dest)
			makePackage(dest, PackageTest)
			if !domain {
				makePackage(dest, PackageModule)
			} else {
				{
					suffix := "models"
					makePackageFolder(dest + "/" + suffix)
					makePackage(dest+"/"+suffix, PackageModule)
				}
				{
					suffix := "controllers"
					makePackageFolder(dest + "/" + suffix)
					makePackage(dest+"/"+suffix, PackageModule)
					makePackage(dest+"/"+suffix, PackageTest)
				}
				{
					suffix := "views"
					makePackageFolder(dest + "/" + suffix)
					makePackage(dest+"/"+suffix, PackageModule)
					makePackage(dest+"/"+suffix, PackageTest)
				}
			}
		} else {
			fmt.Printf("error: %v\n", err)
		}
	}
}

go run domc.go -domain user

Will create:

dir:     user
package: user/user_test.go
dir:     user/models
package: user/models/models.go
dir:     user/controllers
package: user/controllers/controllers.go
package: user/controllers/controllers_test.go
dir:     user/views
package: user/views/views.go
package: user/views/views_test.go

go run domc.go user

Will create:

dir:     user
package: user/user.go
package: user/user_test.go