main.go

package main

import (
	"context"
	"fmt"
	"log"

	"golang.org/x/oauth2/google"
	"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"
)

func main() {
  ts, err := google.DefaultTokenSource(context.Background())
	if err != nil {
		log.Fatal(err)
	}

	token, err := ts.Token()
	if err != nil {
		log.Fatal(err)
	}

	r, err := git.PlainClone("upstream", false, &git.CloneOptions{
		RemoteName: "origin",
		URL: "https://github.com/kelseyhightower/pipeline-application.git",
		Tags: git.AllTags,
	})

	if err != nil {
		log.Fatal(err)
	}

	_, err = r.CreateRemote(&config.RemoteConfig{
		Name: "google",
		URLs: []string{"https://source.developers.google.com/p/pipeline-tutorial/r/pipeline-application"},
	})

	if err != nil {
		log.Fatal(err)
	}

	list, err := r.Remotes()
	if err != nil {
		log.Fatal(err)
	}

	for _, r := range list {
		fmt.Println(r)
	}

	err = r.Push(&git.PushOptions{
		RemoteName: "google",
		Auth:       http.NewBasicAuth("kelsey.hightower@gmail.com", token.AccessToken),
  })

  if err != nil {
		log.Fatal(err)
	}
}