run method

@override Future run()

Runs this command.

The return value is wrapped in a Future if necessary and returned by CommandRunner.runCommand.

Implementation

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

  var branchName = argResults!['branch'] as String;
  if (branchName.isNotEmpty) {
    var remoteFullBranchName = '';
    if (argResults!.rest.isNotEmpty) {
      remoteFullBranchName = argResults!.rest[0];
    } else {
      var branches = await repo.branches();
      if (branches.contains(branchName)) {
        await repo.checkoutBranch(branchName);
        return;
      } else {
        // FIXME: This should lookup which remote has it
        remoteFullBranchName = 'origin/$branchName';
      }
    }

    var remoteName = splitPath(remoteFullBranchName).item1;
    var remoteBranchName = splitPath(remoteFullBranchName).item2;

    var remoteRef = await repo.remoteBranch(remoteName, remoteBranchName);
    if (remoteRef == null) {
      print('fatal: remote $remoteName branch $remoteBranchName not found');
      return;
    }

    await repo.createBranch(branchName, hash: remoteRef.hash);
    await repo.checkout('.');
    await repo.setUpstreamTo(
        repo.config.remote(remoteName)!, remoteBranchName);
    print(
        "Branch '$branchName' set up to track remote branch '$remoteBranchName' from '$remoteName'.");

    var headRef = await repo.head();
    if (headRef == null) {
      print('fatal: head not found');
      return;
    }
    if (headRef.target!.branchName() == branchName) {
      print("Already on '$branchName'");
    }

    return;
  }

  if (argResults!.arguments.isEmpty) {
    print('Must provide a file');
    exit(1);
  }

  var pathSpec = argResults!.arguments[0];
  var branches = await repo.branches();
  if (branches.contains(pathSpec)) {
    await repo.checkoutBranch(pathSpec);
    return;
  }

  // TODO: Check if one of the remotes contains this branch

  var objectsUpdated = await repo.checkout(pathSpec);

  if (objectsUpdated == null) {
    print(
        "error: pathspec '$pathSpec' did not match any file(s) known to git");
    exit(1);
  }
  print('Updated $objectsUpdated path from the index');
}