run method

Implementation

@override
Future run() async {
  var gitRootDir = GitRepository.findRootDir(Directory.current.path)!;
  var repo = await GitRepository.load(gitRootDir);

  var head = await repo.head();
  if (head == null) {
    print('fatal: no head found');
    return;
  }
  if (head.isHash) {
    print('HEAD detached at ${head.hash}');
  } else {
    print('On branch ${head.target!.branchName()}');
  }

  if (head.isHash) {
    return;
  }

  var branch = repo.config.branch(head.target!.branchName()!)!;

  // Construct remote's branch
  var remoteBranchName = branch.merge!.branchName()!;
  var remoteRef = ReferenceName.remote(branch.remote!, remoteBranchName);

  var headHash = (await repo.resolveReference(head))!.hash;
  var remoteHash = (await repo.resolveReferenceName(remoteRef))!.hash;

  var remoteStr = '${branch.remote}/$remoteBranchName';
  if (headHash != remoteHash) {
    var aheadBy = await repo.countTillAncestor(headHash!, remoteHash!);
    if (aheadBy != -1) {
      print('Your branch is ahead of $remoteStr by $aheadBy commits');
    } else {
      var behindBy = await repo.countTillAncestor(remoteHash, headHash);
      if (behindBy != -1) {
        print('Your branch is behind $remoteStr by $behindBy commits');
      } else {
        print('Your branch is not equal to $remoteRef');
      }
    }
  }

  //"Changes not staged for commit:"
  //"Untracked files:"

  print('Changes to be committed:');
  print('  (use "git reset HEAD <file>..." to unstage))\n');

  // Print one of the following -
  // new file: path
  // deleted: path
  // modified: path

  // Get the head commit
  // Get the tree
  // iterate over all objects in the tree and check if present in the index
  // make sure that for each path, the hash in the index is the same
}