[SOLVED] Use go-git to check if branch has been pushed to remote

Use go-git to check if branch has been pushed to remote

Using go-git, is there any way to check if I have made a commit, but have not yet pushed it to a remote?

For instance:

$ echo "Hello" > hello.txt
$ git add -A
$ git commit -am "Add hello"
$ git status
On branch master
Your branch is ahead of 'origin/master' by 2 commits.
  (use "git push" to publish your local commits)

nothing to commit, working tree clean

I know I can use go-git to check w,_ = repo.Worktree() and w.Status(), but that doesn't seem to give me what I'm after, unless I'm missing something.

Solution

I followed VonC's answer and coded up a solution.

func main() {
  dir, err := os.Getwd()
  CheckIfError(err)

  repo, err := git.PlainOpen(dir)
  CheckIfError(err)

  revision := "origin/master"

  revHash, err := repo.ResolveRevision(plumbing.Revision(revision))
  CheckIfError(err)
  revCommit, err := repo.CommitObject(*revHash)

  CheckIfError(err)

  headRef, err := repo.Head()
  CheckIfError(err)
  // ... retrieving the commit object
  headCommit, err := repo.CommitObject(headRef.Hash())
  CheckIfError(err)

  isAncestor, err := headCommit.IsAncestor(revCommit)

  CheckIfError(err)

  fmt.Printf("Is the HEAD an IsAncestor of origin/master? : %v\n",isAncestor)
}

Gist here