How to determine with JGit which branches have been merged to master?

问题

How do I use JGit to determine which branches have been merged to master?

I want to do the equivalent of the normal git command:

git branch -a --merged

Is this possible in JGit?

回答1:

RevWalk::isMergedInto() can be used to determine if a commit was merged into another. That is, isMergedInto returns true if the commit given in the first argument is an ancestor of the second given commit.

try( RevWalk revWalk = new RevWalk( repository ) ) {
  RevCommit masterHead = revWalk.parseCommit( repository.resolve( "refs/heads/master" );
  RevCommit otherHead = revWalk.parseCommit( repository.resolve( "refs/heads/other-branch" );
  if( revWalk.isMergedInto( otherHead, masterHead ) ) {
    ...
  }
}

To get a list of all branches the ListBranchesCommand is used:

List<Ref> branches = Git.wrap( repository ).listBranches().setListMode( ListMode.ALL ).call();

来源：https://stackoverflow.com/questions/26644919/how-to-determine-with-jgit-which-branches-have-been-merged-to-master