My first go program - updating local directories with their scm command

update.go

package main

import (
        "bytes"
        "fmt"
        "os"
        "os/exec"
)

func isDir(path string) (bool, error) {
        stat, err := os.Stat(path)
        if err != nil {
                return false, err
        }
        return stat.IsDir(), nil
}

func getSCM(path string) string {
        if b, _ := isDir(path + "/.git"); b == true {
                return "git"
        }

        if b, _ := isDir(path + "/.hg"); b == true {
                return "hg"
        }

        return ""
}

func execSCM(scm, action string) {
        cmd := exec.Command("/usr/bin/env", scm, action)
        var out bytes.Buffer
        cmd.Stdout = &out

        err := cmd.Run()
        if err != nil {
                fmt.Fprintf(os.Stderr, "Could not execute command: %v", err)
                return
        }
        fmt.Printf("%s\n", out.String())
}

func updateSCM(dir, path, scm string) {
        if scm == "" {
                return
        }

        fmt.Printf("Updating %s\n", dir)
        os.Chdir(path)
        execSCM(scm, "pull")
        os.Chdir("..")
}

func updateDirs(path string, list []os.FileInfo) {
        for _, item := range list {
                file := path + "/" + item.Name()
                if item.IsDir() {
                        scm := getSCM(file)
                        updateSCM(item.Name(), file, scm)
                }
        }
}

func main() {
        path, err := os.Getwd()
        if err != nil {
                panic(err)
        }

        var file *os.File
        file, err = os.Open(path)
        if err != nil {
                panic(err)
        }
        defer file.Close()

        var list []os.FileInfo
        list, err = file.Readdir(-1)

        if err != nil {
                panic(err)
        }

        if len(list) == 0 {
                fmt.Printf("No files where found at %s\n", path)
                os.Exit(-1)
        }

        updateDirs(path, list)
        fmt.Println("Done")
}