public static boolean doPrepare(
      final Module module, final List<String> errorMessages, final List<String> successMessages) {
    final String pluginName = module.getName();
    final String defaultPath =
        new File(module.getModuleFilePath()).getParent() + File.separator + pluginName;
    final HashSet<Module> modules = new HashSet<Module>();
    PluginBuildUtil.getDependencies(module, modules);
    modules.add(module);
    final Set<Library> libs = new HashSet<Library>();
    for (Module dep : modules) {
      PluginBuildUtil.getLibraries(dep, libs);
    }

    final Map<Module, String> jpsModules = collectJpsPluginModules(module);
    modules.removeAll(jpsModules.keySet());

    final boolean isZip = !libs.isEmpty() || !jpsModules.isEmpty();
    final String oldPath = defaultPath + (isZip ? JAR_EXTENSION : ZIP_EXTENSION);
    final File oldFile = new File(oldPath);
    if (oldFile.exists()) {
      if (Messages.showYesNoDialog(
              module.getProject(),
              DevKitBundle.message("suggest.to.delete", oldPath),
              DevKitBundle.message("info.message"),
              Messages.getInformationIcon())
          == Messages.YES) {
        FileUtil.delete(oldFile);
      }
    }

    final String dstPath = defaultPath + (isZip ? ZIP_EXTENSION : JAR_EXTENSION);
    final File dstFile = new File(dstPath);
    return clearReadOnly(module.getProject(), dstFile)
        && ProgressManager.getInstance()
            .runProcessWithProgressSynchronously(
                new Runnable() {
                  public void run() {

                    final ProgressIndicator progressIndicator =
                        ProgressManager.getInstance().getProgressIndicator();
                    if (progressIndicator != null) {
                      progressIndicator.setText(
                          DevKitBundle.message("prepare.for.deployment.common"));
                      progressIndicator.setIndeterminate(true);
                    }
                    try {
                      File jarFile = preparePluginsJar(module, modules);
                      if (isZip) {
                        processLibrariesAndJpsPlugins(
                            jarFile, dstFile, pluginName, libs, jpsModules, progressIndicator);
                      } else {
                        FileUtil.copy(jarFile, dstFile);
                      }
                      LocalFileSystem.getInstance()
                          .refreshIoFiles(Collections.singleton(dstFile), true, false, null);
                      successMessages.add(
                          DevKitBundle.message(
                              "saved.message", isZip ? 1 : 2, pluginName, dstPath));
                    } catch (final IOException e) {
                      errorMessages.add(e.getMessage() + "\n(" + dstPath + ")");
                    }
                  }
                },
                DevKitBundle.message("prepare.for.deployment", pluginName),
                true,
                module.getProject());
  }
  /**
   * Preform a merge commit
   *
   * @param project a project
   * @param root a vcs root
   * @param added added files
   * @param removed removed files
   * @param messageFile a message file for commit
   * @param author an author
   * @param exceptions the list of exceptions to report
   * @param partialOperation
   * @return true if merge commit was successful
   */
  private static boolean mergeCommit(
      final Project project,
      final VirtualFile root,
      final Set<FilePath> added,
      final Set<FilePath> removed,
      final File messageFile,
      final String author,
      List<VcsException> exceptions,
      @NotNull final PartialOperation partialOperation) {
    HashSet<FilePath> realAdded = new HashSet<FilePath>();
    HashSet<FilePath> realRemoved = new HashSet<FilePath>();
    // perform diff
    GitSimpleHandler diff = new GitSimpleHandler(project, root, GitCommand.DIFF);
    diff.setSilent(true);
    diff.setStdoutSuppressed(true);
    diff.addParameters("--diff-filter=ADMRUX", "--name-status", "HEAD");
    diff.endOptions();
    String output;
    try {
      output = diff.run();
    } catch (VcsException ex) {
      exceptions.add(ex);
      return false;
    }
    String rootPath = root.getPath();
    for (StringTokenizer lines = new StringTokenizer(output, "\n", false);
        lines.hasMoreTokens(); ) {
      String line = lines.nextToken().trim();
      if (line.length() == 0) {
        continue;
      }
      String[] tk = line.split("\t");
      switch (tk[0].charAt(0)) {
        case 'M':
        case 'A':
          realAdded.add(VcsUtil.getFilePath(rootPath + "/" + tk[1]));
          break;
        case 'D':
          realRemoved.add(VcsUtil.getFilePathForDeletedFile(rootPath + "/" + tk[1], false));
          break;
        default:
          throw new IllegalStateException("Unexpected status: " + line);
      }
    }
    realAdded.removeAll(added);
    realRemoved.removeAll(removed);
    if (realAdded.size() != 0 || realRemoved.size() != 0) {

      final List<FilePath> files = new ArrayList<FilePath>();
      files.addAll(realAdded);
      files.addAll(realRemoved);
      final Ref<Boolean> mergeAll = new Ref<Boolean>();
      try {
        GuiUtils.runOrInvokeAndWait(
            new Runnable() {
              public void run() {
                String message =
                    GitBundle.message("commit.partial.merge.message", partialOperation.getName());
                SelectFilePathsDialog dialog =
                    new SelectFilePathsDialog(
                        project,
                        files,
                        message,
                        null,
                        "Commit All Files",
                        CommonBundle.getCancelButtonText(),
                        false);
                dialog.setTitle(GitBundle.getString("commit.partial.merge.title"));
                dialog.show();
                mergeAll.set(dialog.isOK());
              }
            });
      } catch (RuntimeException ex) {
        throw ex;
      } catch (Exception ex) {
        throw new RuntimeException("Unable to invoke a message box on AWT thread", ex);
      }
      if (!mergeAll.get()) {
        return false;
      }
      // update non-indexed files
      if (!updateIndex(project, root, realAdded, realRemoved, exceptions)) {
        return false;
      }
      for (FilePath f : realAdded) {
        VcsDirtyScopeManager.getInstance(project).fileDirty(f);
      }
      for (FilePath f : realRemoved) {
        VcsDirtyScopeManager.getInstance(project).fileDirty(f);
      }
    }
    // perform merge commit
    try {
      GitSimpleHandler handler = new GitSimpleHandler(project, root, GitCommand.COMMIT);
      handler.setStdoutSuppressed(false);
      handler.addParameters("-F", messageFile.getAbsolutePath());
      if (author != null) {
        handler.addParameters("--author=" + author);
      }
      handler.endOptions();
      handler.run();
      GitRepositoryManager manager = GitUtil.getRepositoryManager(project);
      manager.updateRepository(root);
    } catch (VcsException ex) {
      exceptions.add(ex);
      return false;
    }
    return true;
  }