private void updateHead(final Commit commit) throws IOException {
final RefUpdate refUpdate = repository.updateRef(branchName);
refUpdate.setNewObjectId(commit.getCommitId());
refUpdate.setRefLogMessage(commit.getMessage(), false);
refUpdate.forceUpdate();
final RefUpdate refUpdate2 = repository.updateRef(Constants.HEAD);
refUpdate2.setNewObjectId(commit.getCommitId());
refUpdate2.setRefLogMessage(commit.getMessage(), false);
refUpdate2.forceUpdate();
}
private void doCheckout(final Ref branch) throws IOException {
if (branch == null) throw die("cannot checkout; no HEAD advertised by remote");
if (!Constants.HEAD.equals(branch.getName())) db.writeSymref(Constants.HEAD, branch.getName());
final Commit commit = db.mapCommit(branch.getObjectId());
final RefUpdate u = db.updateRef(Constants.HEAD);
u.setNewObjectId(commit.getCommitId());
u.forceUpdate();
final GitIndex index = new GitIndex(db);
final Tree tree = commit.getTree();
final WorkDirCheckout co;
co = new WorkDirCheckout(db, db.getWorkDir(), index, tree);
co.checkout();
index.write();
}