What is the equivalent of `git merge-base --is-ancestor` using API?

[Himanshu Gohel]

Hi all,

I've been looking through the API docs in trying to work out the equivalent of this, described in git-merge-base man page:

  if git merge-base --is-ancestor A B
  then
    ... A is an ancestor of B ...
  fi

How can this be done using the API?  I've been experimenting with GHCompare class but not clear yet. Thanks,

--
Himanshu

[Himanshu Gohel]

Here's some code that worked for the limited cases I had to handle (caveats: setup code not shown, and this sample can be simplified):

def commitCompare = repo.getCompare(commit1, commit2)

if (commitCompare.getStatus() == GHCompare.Status.identical) {

println "Commits are identical: $commit1, $commit2"

return true;

}

def mergeBaseCommit = commitCompare.getMergeBaseCommit().getSHA1();

println "Merge-base commit for $commit1, $commit2 is $mergeBaseCommit"

def compareStatus = repo.getCompare(commit1, mergeBaseCommit).getStatus();

if ( compareStatus == GHCompare.Status.identical )

{

println "$commit1 is an ancestor of $commit2"

} else {

println "$commit1 is not an ancestor of $commit2"

}