guessRemoteHead method

Future<Reference?> guessRemoteHead(String remoteName)

Implementation

Future<Reference?> guessRemoteHead(String remoteName) async {
  // See: https://stackoverflow.com/questions/8839958/how-does-origin-head-get-set/25430727#25430727
  //      https://stackoverflow.com/questions/8839958/how-does-origin-head-get-set/8841024#8841024
  //
  // The ideal way is to use https://libgit2.org/libgit2/#HEAD/group/remote/git_remote_default_branch
  //
  var branches = await remoteBranches(remoteName);
  if (branches.isEmpty) {
    return null;
  }

  var i = branches.indexWhere((b) => b.name.branchName() == 'HEAD');
  if (i != -1) {
    var remoteHead = branches[i];
    assert(remoteHead.isSymbolic);

    return resolveReference(remoteHead);
  } else {
    branches = branches.where((b) => b.name.branchName() != 'HEAD').toList();
  }

  if (branches.length == 1) {
    return branches[0];
  }

  var mi = branches.indexWhere((e) => e.name.branchName() == 'master');
  if (mi != -1) {
    return branches[mi];
  }

  mi = branches.indexWhere((e) => e.name.branchName() == 'main');
  if (mi != -1) {
    return branches[mi];
  }

  // Return the first alphabetical one
  branches
      .sort((a, b) => a.name.branchName()!.compareTo(b.name.branchName()!));
  return branches[0];
}