private void createBranch(final String textForBranch, RevCommit commit, IProgressMonitor monitor)
      throws CoreException, GitAPIException {
    monitor.setTaskName(UIText.FetchGerritChangePage_CreatingBranchTaskName);
    CreateLocalBranchOperation bop =
        new CreateLocalBranchOperation(repository, textForBranch, commit);
    bop.execute(monitor);
    CheckoutCommand co = new Git(repository).checkout();
    try {
      co.setName(textForBranch).call();
    } catch (CheckoutConflictException e) {
      final CheckoutResult result = co.getResult();

      if (result.getStatus() == Status.CONFLICTS) {
        final Shell shell = getWizard().getContainer().getShell();

        shell
            .getDisplay()
            .asyncExec(
                new Runnable() {
                  public void run() {
                    new CheckoutConflictDialog(shell, repository, result.getConflictList()).open();
                  }
                });
      }
    }
    monitor.worked(1);
  }
  public void cloneBinaryRepository() throws GitException {

    // find the name of the "source repository"
    String srcRepoUrl = getSourceRemoteUrl();
    String org = GitUtils.getOrgName(srcRepoUrl);
    String repoName = GitUtils.getRepositoryName(srcRepoUrl);
    String binaryRepoName = calculateBinaryRepositoryName(org, repoName);

    // find where ".git" folder is found
    File f = sourceRepository.getDirectory();
    File sourceDir = f.getParentFile();

    String sourceRepoFolderName = f.getParentFile().getName();

    // construct the binary repository URL
    String giturl = "[email protected]:Binary/" + binaryRepoName + ".git";

    // calculate binary repository folder
    File parent = f.getParentFile().getParentFile();
    File binaryRepoFolder = new File(parent, ("." + sourceRepoFolderName));

    // clone the binary repository
    CloneCommand cloneCmd = Git.cloneRepository();
    cloneCmd.setURI(giturl);
    cloneCmd.setDirectory(binaryRepoFolder);
    cloneCmd.setCloneAllBranches(true);

    Git binrepository = null;

    try {

      System.out.println("cloning repository " + giturl);
      binrepository = cloneCmd.call();

      binaryRepository = new FileRepository(binrepository.getRepository().getDirectory());

    } catch (InvalidRemoteException e) {
      throw new GitException("unable to clone " + giturl, e);
    } catch (TransportException e) {
      throw new GitException("unable to clone " + giturl, e);
    } catch (GitAPIException e) {
      throw new GitException("unable to clone " + giturl, e);
    } catch (IOException e) {
      throw new GitException("unable assign " + giturl, e);
    }

    // read the branch from "source" repository
    String branchName = "master";
    try {
      branchName = sourceRepository.getBranch();
    } catch (IOException e) {
      e.printStackTrace();
    }

    // Checkout the "branch" if it is not equal to "master"
    if (!branchName.toLowerCase().equals("master")) {

      // check whether the branch exists
      boolean remoteBranchExists = GitUtils.isRemoteBranchExists(binaryRepository, branchName);

      CheckoutResult result = null;

      if (!remoteBranchExists) {

        try {

          // create branch
          Git binrepo = Git.wrap(binaryRepository);
          CreateBranchCommand branchCmd = binrepo.branchCreate();
          branchCmd.setName(branchName);
          branchCmd.call();

          // checkout the branch
          CheckoutCommand checkout = binrepo.checkout();
          checkout.setName(branchName);
          Ref ref = checkout.call();

          if (ref == null) {
            // TODO:
          } else {
            result = checkout.getResult();
          }

        } catch (RefAlreadyExistsException e) {
          throw new GitException("unable to create branch " + branchName, e);
        } catch (RefNotFoundException e) {
          throw new GitException("unable to create branch " + branchName, e);
        } catch (InvalidRefNameException e) {
          throw new GitException("unable to create branch " + branchName, e);
        } catch (GitAPIException e) {
          throw new GitException("unable to create branch " + branchName, e);
        }

      } else {

        CheckoutCommand checkoutCmd = binrepository.checkout();
        checkoutCmd.setCreateBranch(true);
        checkoutCmd.setName(branchName);
        checkoutCmd.setUpstreamMode(CreateBranchCommand.SetupUpstreamMode.TRACK);
        checkoutCmd.setStartPoint("origin/" + branchName);

        System.out.println("checking out branch " + branchName);

        try {
          // Ref branch = branchCmd.call();
          Ref ref = checkoutCmd.call();
          System.out.println("checkout is complete");
          if (ref != null) {
            // System.out.println("ref " + ref.getName() );
            result = checkoutCmd.getResult();
          }

        } catch (RefAlreadyExistsException e) {
          throw new GitException("unable to checkout branch " + branchName, e);
        } catch (RefNotFoundException e) {
          throw new GitException("unable to checkout branch " + branchName, e);
        } catch (InvalidRefNameException e) {
          throw new GitException("unable to checkout branch " + branchName, e);
        } catch (CheckoutConflictException e) {
          throw new GitException("unable to checkout branch " + branchName, e);
        } catch (GitAPIException e) {
          throw new GitException("unable to checkout branch " + branchName, e);
        }
      }

      if (result.getStatus().equals(CheckoutResult.OK_RESULT)) {
        System.out.println("checkout is OK");
      } else {
        // TODO: handle the error.
      }
    }

    // System.out.println( result.getStatus());
    // TODO: find out whether Binary is upto-date with the sources

    /*
    // call the MapSvc to find it out.
          final org.eclipse.jgit.lib.Repository repository = new org.eclipse.jgit.storage.file.FileRepository(f);
          final RevWalk revWalk = new RevWalk(repository);
          final ObjectId resolve = repository.resolve(Constants.HEAD);
          final RevCommit commit = revWalk.parseCommit(resolve);
          final String commitHash = commit.getName();
          final String url = getUrlForFindByRepoBranchCommit() + "repourl=" + URLEncoder.encode(getSourceRemoteUrl(), UTF_8) +
                  "&branch=" + URLEncoder.encode(branchName, UTF_8) + "&commitid=" + URLEncoder.encode(commitHash, UTF_8);

          final WebResource webResource = client.resource(url);
          boolean noContent = false;

          BinRepoBranchCommitDO binRepoBranchCommitDO = null;
          try {
          	System.out.println("calling mapsvc ");
              binRepoBranchCommitDO = webResource.accept(MediaType.APPLICATION_JSON_TYPE).get(BinRepoBranchCommitDO.class);
          } catch (UniformInterfaceException e) {
              int statusCode = e.getResponse().getClientResponseStatus().getStatusCode();
              noContent = (statusCode == 204);
          } catch (Exception e) { // catch-all in case there are network problems
              e.printStackTrace();
          }


          // No matching entry found in mapping service
          // TODO: RGIROTI Talk to Nambi and find out what we want to do in this case
          if (noContent) {

          } else {
              // if it matches copy the .class files from binaryrepository to source-repository
              if (binRepoBranchCommitDO != null &&
                      binRepoBranchCommitDO.getRepoUrl().equalsIgnoreCase(getSourceRemoteUrl()) &&
                      binRepoBranchCommitDO.getBranch().equalsIgnoreCase(branchName) &&
                      binRepoBranchCommitDO.getCommitId().equalsIgnoreCase(commitHash)) {

              }
          }
          */

    try {
      FileUtil.copyBinaryFolders(binaryRepoFolder, sourceDir, ".git");
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
  private boolean handlePut(
      HttpServletRequest request, HttpServletResponse response, String pathString)
      throws GitAPIException, CoreException, IOException, JSONException, ServletException {
    IPath path = pathString == null ? Path.EMPTY : new Path(pathString);
    if (path.segment(0).equals("file") && path.segmentCount() > 1) { // $NON-NLS-1$

      // make sure a clone is addressed
      WebProject webProject = GitUtils.projectFromPath(path);
      if (isAccessAllowed(request.getRemoteUser(), webProject)) {
        Map<IPath, File> gitDirs = GitUtils.getGitDirs(path, Traverse.CURRENT);
        if (gitDirs.isEmpty()) {
          String msg = NLS.bind("Request path is not a git repository: {0}", path);
          return statusHandler.handleRequest(
              request,
              response,
              new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
        }
        File gitDir = gitDirs.values().iterator().next();

        // make sure required fields are set
        JSONObject toCheckout = OrionServlet.readJSONRequest(request);
        JSONArray paths = toCheckout.optJSONArray(ProtocolConstants.KEY_PATH);
        String branch = toCheckout.optString(GitConstants.KEY_BRANCH_NAME, null);
        String tag = toCheckout.optString(GitConstants.KEY_TAG_NAME, null);
        boolean removeUntracked = toCheckout.optBoolean(GitConstants.KEY_REMOVE_UNTRACKED, false);
        if ((paths == null || paths.length() == 0) && branch == null && tag == null) {
          String msg =
              NLS.bind(
                  "Either '{0}' or '{1}' or '{2}' should be provided, got: {3}",
                  new Object[] {
                    ProtocolConstants.KEY_PATH,
                    GitConstants.KEY_BRANCH_NAME,
                    GitConstants.KEY_TAG_NAME,
                    toCheckout
                  });
          return statusHandler.handleRequest(
              request,
              response,
              new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
        }

        Git git = new Git(new FileRepository(gitDir));
        if (paths != null) {
          Set<String> toRemove = new HashSet<String>();
          CheckoutCommand checkout = git.checkout();
          for (int i = 0; i < paths.length(); i++) {
            String p = paths.getString(i);
            if (removeUntracked && !isInIndex(git.getRepository(), p)) toRemove.add(p);
            checkout.addPath(p);
          }
          checkout.call();
          for (String p : toRemove) {
            File f = new File(git.getRepository().getWorkTree(), p);
            f.delete();
          }
          return true;
        } else if (tag != null && branch != null) {
          CheckoutCommand co = git.checkout();
          try {
            co.setName(branch).setStartPoint(tag).setCreateBranch(true).call();
            return true;
          } catch (RefNotFoundException e) {
            String msg = NLS.bind("Tag not found: {0}", tag);
            return statusHandler.handleRequest(
                request,
                response,
                new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, e));
          } catch (GitAPIException e) {
            if (org.eclipse.jgit.api.CheckoutResult.Status.CONFLICTS.equals(
                co.getResult().getStatus())) {
              return statusHandler.handleRequest(
                  request,
                  response,
                  new ServerStatus(
                      IStatus.ERROR, HttpServletResponse.SC_CONFLICT, "Checkout aborted.", e));
            }
            // TODO: handle other exceptions
          }
        } else if (branch != null) {

          if (!isLocalBranch(git, branch)) {
            String msg = NLS.bind("{0} is not a branch.", branch);
            return statusHandler.handleRequest(
                request,
                response,
                new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, null));
          }

          CheckoutCommand co = git.checkout();
          try {
            co.setName(Constants.R_HEADS + branch).call();
            return true;
          } catch (CheckoutConflictException e) {
            return statusHandler.handleRequest(
                request,
                response,
                new ServerStatus(
                    IStatus.ERROR, HttpServletResponse.SC_CONFLICT, "Checkout aborted.", e));
          } catch (RefNotFoundException e) {
            String msg = NLS.bind("Branch name not found: {0}", branch);
            return statusHandler.handleRequest(
                request,
                response,
                new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, e));
          } // TODO: handle other exceptions
        }
      } else {
        String msg = NLS.bind("Nothing found for the given ID: {0}", path);
        return statusHandler.handleRequest(
            request,
            response,
            new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, null));
      }
    }
    String msg = NLS.bind("Invalid checkout request {0}", pathString);
    return statusHandler.handleRequest(
        request,
        response,
        new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null));
  }