package root_dir

import (
	"os"
	"regexp"
)

func RootDir(projectDirName string) string {
	if projectDirName == "" {
		return ""
	}

	projectName := regexp.MustCompile(`^(.*` + projectDirName + `)`)
	currentWorkDirectory, _ := os.Getwd()
	rootPath := projectName.Find([]byte(currentWorkDirectory))
	if len(rootPath) <= 0 {
		return ""
	}
	return string(rootPath)
}