go-git-mirror.go

package main

import (
	"log"
	"os"

	"gopkg.in/src-d/go-billy.v4/memfs"
	"gopkg.in/src-d/go-git.v4"
	"gopkg.in/src-d/go-git.v4/config"
	"gopkg.in/src-d/go-git.v4/plumbing/transport/http"
	"gopkg.in/src-d/go-git.v4/storage/memory"
)

func main() {
	repo, err := git.Clone(memory.NewStorage(), memfs.New(), &git.CloneOptions{
		URL:      os.Getenv("GIT_ORIGIN"),
		Progress: os.Stdout,
	})
	if err != nil {
		log.Fatal(err)
	}

	_, err = repo.CreateRemote(&config.RemoteConfig{
		Name:  "mirror",
		URLs:  []string{os.Getenv("GIT_MIRROR")},
		Fetch: []config.RefSpec{"+refs/heads/*:refs/remotes/mirror/*"},
	})
	if err != nil {
		log.Fatal(err)
	}

	err = repo.Push(&git.PushOptions{
		RemoteName: "mirror",
		Auth: &http.BasicAuth{
			Username: os.Getenv("GIT_USERNAME"),
			Password: os.Getenv("GIT_PASSWORD"),
		},
		Progress: os.Stdout,
	})
	if err == git.NoErrAlreadyUpToDate {
		log.Println("Success!")
	} else {
		log.Fatal(err)
	}
}