org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/sharing/ExistingOrNewPage.java

   1 /*******************************************************************************
   2  * Copyright (C) 2009, 2013 Robin Rosenberg and others.
   3  * Copyright (C) 2009, Mykola Nikishov <mn@mn.com.ua>
   4  * Copyright (C) 2011, Mathias Kinzler <mathias.kinzler@sap.com>
   5  *
   6  * All rights reserved. This program and the accompanying materials
   7  * are made available under the terms of the Eclipse Public License v1.0
   8  * which accompanies this distribution, and is available at
   9  * http://www.eclipse.org/legal/epl-v10.html
  10  *******************************************************************************/
  11 package org.eclipse.egit.ui.internal.sharing;
  12
  13 import java.io.File;
  14 import java.io.IOException;
  15 import java.util.Collection;
  16 import java.util.HashMap;
  17 import java.util.Iterator;
  18 import java.util.Map;
  19
  20 import org.eclipse.core.resources.IProject;
  21 import org.eclipse.core.resources.IResource;
  22 import org.eclipse.core.resources.ResourcesPlugin;
  23 import org.eclipse.core.runtime.CoreException;
  24 import org.eclipse.core.runtime.IPath;
  25 import org.eclipse.core.runtime.NullProgressMonitor;
  26 import org.eclipse.core.runtime.Path;
  27 import org.eclipse.egit.core.RepositoryUtil;
  28 import org.eclipse.egit.core.project.RepositoryFinder;
  29 import org.eclipse.egit.core.project.RepositoryMapping;
  30 import org.eclipse.egit.ui.Activator;
  31 import org.eclipse.egit.ui.internal.UIIcons;
  32 import org.eclipse.egit.ui.internal.UIText;
  33 import org.eclipse.egit.ui.internal.repository.NewRepositoryWizard;
  34 import org.eclipse.jface.dialogs.Dialog;
  35 import org.eclipse.jface.dialogs.IMessageProvider;
  36 import org.eclipse.jface.dialogs.MessageDialog;
  37 import org.eclipse.jface.layout.GridDataFactory;
  38 import org.eclipse.jface.layout.GridLayoutFactory;
  39 import org.eclipse.jface.viewers.ArrayContentProvider;
  40 import org.eclipse.jface.viewers.CheckStateChangedEvent;
  41 import org.eclipse.jface.viewers.CheckboxTableViewer;
  42 import org.eclipse.jface.viewers.CheckboxTreeViewer;
  43 import org.eclipse.jface.viewers.ComboViewer;
  44 import org.eclipse.jface.viewers.ICheckStateListener;
  45 import org.eclipse.jface.viewers.ISelection;
  46 import org.eclipse.jface.viewers.IStructuredSelection;
  47 import org.eclipse.jface.viewers.StructuredSelection;
  48 import org.eclipse.jface.viewers.ViewerSorter;
  49 import org.eclipse.jface.window.Window;
  50 import org.eclipse.jface.wizard.WizardDialog;
  51 import org.eclipse.jface.wizard.WizardPage;
  52 import org.eclipse.jgit.lib.Constants;
  53 import org.eclipse.jgit.lib.ObjectId;
  54 import org.eclipse.jgit.lib.Repository;
  55 import org.eclipse.jgit.lib.RepositoryBuilder;
  56 import org.eclipse.jgit.revwalk.RevCommit;
  57 import org.eclipse.jgit.revwalk.RevTree;
  58 import org.eclipse.jgit.revwalk.RevWalk;
  59 import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
  60 import org.eclipse.jgit.treewalk.TreeWalk;
  61 import org.eclipse.osgi.util.NLS;
  62 import org.eclipse.swt.SWT;
  63 import org.eclipse.swt.events.ModifyEvent;
  64 import org.eclipse.swt.events.ModifyListener;
  65 import org.eclipse.swt.events.SelectionAdapter;
  66 import org.eclipse.swt.events.SelectionEvent;
  67 import org.eclipse.swt.layout.GridData;
  68 import org.eclipse.swt.layout.GridLayout;
  69 import org.eclipse.swt.widgets.Button;
  70 import org.eclipse.swt.widgets.Combo;
  71 import org.eclipse.swt.widgets.Composite;
  72 import org.eclipse.swt.widgets.DirectoryDialog;
  73 import org.eclipse.swt.widgets.Event;
  74 import org.eclipse.swt.widgets.Label;
  75 import org.eclipse.swt.widgets.Listener;
  76 import org.eclipse.swt.widgets.Table;
  77 import org.eclipse.swt.widgets.TableColumn;
  78 import org.eclipse.swt.widgets.TableItem;
  79 import org.eclipse.swt.widgets.Text;
  80 import org.eclipse.swt.widgets.Tree;
  81 import org.eclipse.swt.widgets.TreeColumn;
  82 import org.eclipse.swt.widgets.TreeItem;
  83 import org.eclipse.ui.PlatformUI;
  84 import org.eclipse.ui.ide.IDE.SharedImages;
  85
  86 /**
  87  * Wizard page for connecting projects to Git repositories.
  88  */
  89 class ExistingOrNewPage extends WizardPage {
  90
  91         private final SharingWizard myWizard;
  92
  93         private Button createRepo;
  94
  95         private Tree tree;
  96
  97         private CheckboxTreeViewer viewer;
  98
  99         private Text repositoryToCreate;
 100
 101         private IPath minumumPath;
 102
 103         private Label dotGitSegment;
 104
 105         private Composite externalComposite;
 106
 107         private Composite parentRepoComposite;
 108
 109         private Text workDir;
 110
 111         private Text relPath;
 112
 113         private Button browseRepository;
 114
 115         private Repository selectedRepository;
 116
 117         private CheckboxTableViewer projectMoveViewer;
 118
 119         private final MoveProjectsLabelProvider moveProjectsLabelProvider = new MoveProjectsLabelProvider();
 120
 121         private boolean internalMode = false;
 122
 123         ExistingOrNewPage(SharingWizard w) {
 124                 super(ExistingOrNewPage.class.getName());
 125                 setTitle(UIText.ExistingOrNewPage_title);
 126                 setImageDescriptor(UIIcons.WIZBAN_CONNECT_REPO);
 127                 this.myWizard = w;
 128         }
 129
 130         @Override
 131         public void createControl(Composite parent) {
 132                 final RepositoryUtil util = Activator.getDefault().getRepositoryUtil();
 133                 Composite main = new Composite(parent, SWT.NONE);
 134                 // use zero spacing to save some real estate here
 135                 GridLayoutFactory.fillDefaults().spacing(0, 0).applyTo(main);
 136
 137                 final Button internalModeButton = new Button(main, SWT.CHECK);
 138                 internalModeButton
 139                                 .setText(UIText.ExistingOrNewPage_InternalModeCheckbox);
 140                 internalModeButton
 141                                 .setToolTipText(UIText.ExistingOrNewPage_CreationInWorkspaceWarningTooltip);
 142                 internalModeButton.addSelectionListener(new SelectionAdapter() {
 143                         @Override
 144                         public void widgetSelected(SelectionEvent e) {
 145                                 internalMode = internalModeButton.getSelection();
 146                                 updateControls();
 147                         }
 148                 });
 149
 150                 externalComposite = new Composite(main, SWT.NONE);
 151                 GridDataFactory.fillDefaults().grab(true, true)
 152                                 .applyTo(externalComposite);
 153                 externalComposite.setLayout(new GridLayout(3, false));
 154
 155                 new Label(externalComposite, SWT.NONE)
 156                                 .setText(UIText.ExistingOrNewPage_ExistingRepositoryLabel);
 157                 final Combo existingRepoCombo = new Combo(externalComposite,
 158                                 SWT.READ_ONLY);
 159                 GridDataFactory.fillDefaults().grab(true, false)
 160                                 .applyTo(existingRepoCombo);
 161                 final ComboViewer v = new ComboViewer(existingRepoCombo);
 162                 v.setContentProvider(new RepoComboContentProvider());
 163                 v.setLabelProvider(new RepoComboLabelProvider());
 164                 v.setInput(new Object());
 165                 // the default ViewerSorter seems to do the right thing
 166                 // i.e. sort as String
 167                 v.setSorter(new ViewerSorter());
 168
 169                 existingRepoCombo.addSelectionListener(new SelectionAdapter() {
 170                         @Override
 171                         public void widgetSelected(SelectionEvent e) {
 172                                 selectedRepository = null;
 173                                 IStructuredSelection sel = (IStructuredSelection) v
 174                                                 .getSelection();
 175                                 setRepository((Repository) sel.getFirstElement());
 176                                 updateControls();
 177                         }
 178                 });
 179
 180                 Button createRepoWizard = new Button(externalComposite, SWT.PUSH);
 181                 createRepoWizard.setText(UIText.ExistingOrNewPage_CreateRepositoryButton);
 182                 createRepoWizard.addSelectionListener(new SelectionAdapter() {
 183                         @Override
 184                         public void widgetSelected(SelectionEvent e) {
 185                                 NewRepositoryWizard wiz = new NewRepositoryWizard(true);
 186                                 if (new WizardDialog(getShell(), wiz).open() == Window.OK) {
 187                                         v.refresh();
 188                                         selectedRepository = wiz.getCreatedRepository();
 189                                         v.setSelection(new StructuredSelection(selectedRepository));
 190                                         updateControls();
 191                                 }
 192                         }
 193                 });
 194
 195                 new Label(externalComposite, SWT.NONE)
 196                                 .setText(UIText.ExistingOrNewPage_WorkingDirectoryLabel);
 197                 workDir = new Text(externalComposite, SWT.BORDER | SWT.READ_ONLY);
 198                 GridDataFactory.fillDefaults().grab(true, false).applyTo(workDir);
 199                 GridDataFactory.fillDefaults().applyTo(workDir);
 200                 // leave the space between the "Create" and "Browse" buttons empty (i.e.
 201                 // do not fill to the right border
 202                 new Label(externalComposite, SWT.NONE);
 203
 204                 new Label(externalComposite, SWT.NONE)
 205                                 .setText(UIText.ExistingOrNewPage_RelativePathLabel);
 206                 relPath = new Text(externalComposite, SWT.BORDER);
 207                 relPath.addModifyListener(new ModifyListener() {
 208                         @Override
 209                         public void modifyText(ModifyEvent e) {
 210                                 updateControls();
 211                         }
 212                 });
 213
 214                 GridDataFactory.fillDefaults().grab(true, false).applyTo(relPath);
 215                 browseRepository = new Button(externalComposite, SWT.PUSH);
 216                 browseRepository.setEnabled(false);
 217                 browseRepository
 218                                 .setText(UIText.ExistingOrNewPage_BrowseRepositoryButton);
 219                 browseRepository.addSelectionListener(new SelectionAdapter() {
 220                         @Override
 221                         public void widgetSelected(SelectionEvent e) {
 222                                 DirectoryDialog dlg = new DirectoryDialog(getShell());
 223                                 dlg.setFilterPath(selectedRepository.getWorkTree().getPath());
 224                                 String directory = dlg.open();
 225                                 if (directory != null) {
 226                                         setRelativePath(directory);
 227                                         updateControls();
 228                                 }
 229                         }
 230                 });
 231
 232                 Table projectMoveTable = new Table(externalComposite, SWT.MULTI
 233                                 | SWT.FULL_SELECTION | SWT.CHECK | SWT.BORDER);
 234                 projectMoveViewer = new CheckboxTableViewer(projectMoveTable);
 235                 GridDataFactory.fillDefaults().span(3, 1).grab(true, true)
 236                                 .applyTo(projectMoveTable);
 237
 238                 TableColumn tc;
 239                 tc = new TableColumn(projectMoveTable, SWT.NONE);
 240                 tc.setText(UIText.ExistingOrNewPage_ProjectNameColumnHeader);
 241                 tc.setWidth(100);
 242
 243                 tc = new TableColumn(projectMoveTable, SWT.NONE);
 244                 tc.setText(UIText.ExistingOrNewPage_CurrentLocationColumnHeader);
 245                 tc.setWidth(250);
 246
 247                 tc = new TableColumn(projectMoveTable, SWT.NONE);
 248                 tc.setText(UIText.ExistingOrNewPage_NewLocationTargetHeader);
 249                 tc.setWidth(350);
 250
 251                 projectMoveTable.setHeaderVisible(true);
 252                 projectMoveViewer
 253                                 .setContentProvider(ArrayContentProvider.getInstance());
 254                 projectMoveViewer.setLabelProvider(moveProjectsLabelProvider);
 255                 projectMoveViewer.setInput(myWizard.projects);
 256                 projectMoveViewer.addCheckStateListener(new ICheckStateListener() {
 257                         @Override
 258                         public void checkStateChanged(CheckStateChangedEvent event) {
 259                                 updateControls();
 260                         }
 261                 });
 262                 TableItem[] children = projectMoveViewer.getTable().getItems();
 263                 for (int i = 0; i < children.length; i++) {
 264                         TableItem item = children[i];
 265                         IProject data = (IProject) item.getData();
 266                         RepositoryFinder repositoryFinder = new RepositoryFinder(data);
 267                         repositoryFinder.setFindInChildren(false);
 268                         try {
 269                                 Collection<RepositoryMapping> find = repositoryFinder
 270                                                 .find(new NullProgressMonitor());
 271                                 if (find.size() != 1)
 272                                         item.setChecked(true);
 273                         } catch (CoreException e1) {
 274                                 item.setText(2, e1.getMessage());
 275                         }
 276                 }
 277
 278                 parentRepoComposite = new Composite(main, SWT.NONE);
 279                 parentRepoComposite.setLayout(new GridLayout(3, false));
 280                 GridDataFactory.fillDefaults().grab(true, true)
 281                                 .applyTo(parentRepoComposite);
 282
 283                 tree = new Tree(parentRepoComposite, SWT.BORDER | SWT.MULTI
 284                                 | SWT.FULL_SELECTION | SWT.CHECK);
 285                 viewer = new CheckboxTreeViewer(tree);
 286                 tree.setHeaderVisible(true);
 287                 tree.setLayout(new GridLayout());
 288                 tree.setLayoutData(GridDataFactory.fillDefaults().grab(true, true)
 289                                 .span(3, 1).create());
 290                 viewer.addCheckStateListener(new ICheckStateListener() {
 291
 292                         @Override
 293                         public void checkStateChanged(CheckStateChangedEvent event) {
 294                                 if (event.getChecked()) {
 295                                         ProjectAndRepo checkable = (ProjectAndRepo) event
 296                                                         .getElement();
 297                                         for (TreeItem ti : tree.getItems()) {
 298                                                 if (ti.getItemCount() > 0
 299                                                                 || ((ProjectAndRepo) ti.getData()).getRepo()
 300                                                                                 .equals("")) //$NON-NLS-1$
 301                                                         ti.setChecked(false);
 302                                                 for (TreeItem subTi : ti.getItems()) {
 303                                                         IProject project = ((ProjectAndRepo) subTi
 304                                                                         .getData()).getProject();
 305                                                         if (checkable.getProject() != null
 306                                                                         && !subTi.getData().equals(checkable)
 307                                                                         && checkable.getProject().equals(project))
 308                                                                 subTi.setChecked(false);
 309                                                 }
 310                                         }
 311                                 }
 312                         }
 313                 });
 314                 TreeColumn c1 = new TreeColumn(tree, SWT.NONE);
 315                 c1.setText(UIText.ExistingOrNewPage_HeaderProject);
 316                 c1.setWidth(100);
 317                 TreeColumn c2 = new TreeColumn(tree, SWT.NONE);
 318                 c2.setText(UIText.ExistingOrNewPage_HeaderLocation);
 319                 c2.setWidth(400);
 320                 TreeColumn c3 = new TreeColumn(tree, SWT.NONE);
 321                 c3.setText(UIText.ExistingOrNewPage_HeaderRepository);
 322                 c3.setWidth(200);
 323                 boolean allProjectsInExistingRepos = true;
 324                 for (IProject project : myWizard.projects) {
 325                         RepositoryFinder repositoryFinder = new RepositoryFinder(project);
 326                         repositoryFinder.setFindInChildren(false);
 327                         try {
 328                                 Collection<RepositoryMapping> mappings;
 329                                 mappings = repositoryFinder.find(new NullProgressMonitor());
 330                                 Iterator<RepositoryMapping> mi = mappings.iterator();
 331                                 RepositoryMapping m = mi.hasNext() ? mi.next() : null;
 332                                 if (m == null) {
 333                                         // no mapping found, enable repository creation
 334                                         TreeItem treeItem = new TreeItem(tree, SWT.NONE);
 335                                         updateProjectTreeItem(treeItem, project);
 336                                         treeItem.setText(1, project.getLocation().toOSString());
 337                                         treeItem.setText(2, ""); //$NON-NLS-1$
 338                                         treeItem.setData(new ProjectAndRepo(project, "")); //$NON-NLS-1$
 339                                         allProjectsInExistingRepos = false;
 340                                 } else if (!mi.hasNext()) {
 341                                         // exactly one mapping found
 342                                         TreeItem treeItem = new TreeItem(tree, SWT.NONE);
 343                                         updateProjectTreeItem(treeItem, project);
 344                                         treeItem.setText(1, project.getLocation().toOSString());
 345                                         fillTreeItemWithGitDirectory(m, treeItem, false);
 346                                         treeItem.setData(new ProjectAndRepo(project, m
 347                                                         .getGitDirAbsolutePath().toOSString()));
 348                                         treeItem.setChecked(true);
 349                                 }
 350
 351                                 else {
 352                                         TreeItem treeItem = new TreeItem(tree, SWT.NONE);
 353                                         updateProjectTreeItem(treeItem, project);
 354                                         treeItem.setText(1, project.getLocation().toOSString());
 355                                         treeItem.setData(new ProjectAndRepo(project, "")); //$NON-NLS-1$
 356
 357                                         TreeItem treeItem2 = new TreeItem(treeItem, SWT.NONE);
 358                                         updateProjectTreeItem(treeItem2, project);
 359                                         fillTreeItemWithGitDirectory(m, treeItem2, true);
 360                                         treeItem2.setData(new ProjectAndRepo(project, m
 361                                                         .getGitDirAbsolutePath().toOSString()));
 362                                         while (mi.hasNext()) { // fill in additional mappings
 363                                                 m = mi.next();
 364                                                 treeItem2 = new TreeItem(treeItem, SWT.NONE);
 365                                                 updateProjectTreeItem(treeItem2, project);
 366                                                 fillTreeItemWithGitDirectory(m, treeItem2, true);
 367                                                 treeItem2.setData(new ProjectAndRepo(m.getContainer()
 368                                                                 .getProject(), m.getGitDirAbsolutePath()
 369                                                                 .toOSString()));
 370                                         }
 371                                         treeItem.setExpanded(true);
 372                                         allProjectsInExistingRepos = false;
 373                                 }
 374                         } catch (CoreException e) {
 375                                 TreeItem treeItem2 = new TreeItem(tree, SWT.BOLD | SWT.ITALIC);
 376                                 treeItem2.setText(e.getMessage());
 377                         }
 378                 }
 379
 380                 createRepo = new Button(parentRepoComposite, SWT.PUSH);
 381                 createRepo.setLayoutData(GridDataFactory.fillDefaults().create());
 382                 createRepo.setText(UIText.ExistingOrNewPage_CreateButton);
 383                 createRepo.addSelectionListener(new SelectionAdapter() {
 384                         @Override
 385                         public void widgetSelected(SelectionEvent e) {
 386                                 File gitDir = new File(repositoryToCreate.getText(),
 387                                                 Constants.DOT_GIT);
 388                                 try {
 389                                         Repository repository = FileRepositoryBuilder
 390                                                         .create(gitDir);
 391                                         repository.create();
 392                                         for (IProject project : getProjects(false).keySet()) {
 393                                                 // If we don't refresh the project directories right
 394                                                 // now we won't later know that a .git directory
 395                                                 // exists within it and we won't mark the .git
 396                                                 // directory as a team-private member. Failure
 397                                                 // to do so might allow someone to delete
 398                                                 // the .git directory without us stopping them.
 399                                                 // (Half lie, we should optimize so we do not
 400                                                 // refresh when the .git is not within the project)
 401                                                 //
 402                                                 if (!gitDir.toString().contains("..")) //$NON-NLS-1$
 403                                                         project.refreshLocal(IResource.DEPTH_ONE,
 404                                                                         new NullProgressMonitor());
 405                                         }
 406                                         util.addConfiguredRepository(gitDir);
 407                                 } catch (IOException e1) {
 408                                         String msg = NLS
 409                                                         .bind(UIText.ExistingOrNewPage_ErrorFailedToCreateRepository,
 410                                                                         gitDir.toString());
 411                                         org.eclipse.egit.ui.Activator.handleError(msg, e1, true);
 412                                 } catch (CoreException e2) {
 413                                         String msg = NLS
 414                                                         .bind(UIText.ExistingOrNewPage_ErrorFailedToRefreshRepository,
 415                                                                         gitDir);
 416                                         org.eclipse.egit.ui.Activator.handleError(msg, e2, true);
 417                                 }
 418                                 for (TreeItem ti : tree.getSelection()) {
 419                                         IPath projectPath = new Path(ti.getText(1));
 420                                         IPath gitPath = new Path(gitDir.toString());
 421                                         IPath relative = gitPath.makeRelativeTo(projectPath);
 422                                         ti.setText(2, relative.toOSString());
 423                                         ((ProjectAndRepo) ti.getData()).repo = gitDir.toString();
 424                                         ti.setChecked(true);
 425                                 }
 426                                 updateControls();
 427                         }
 428                 });
 429                 repositoryToCreate = new Text(parentRepoComposite, SWT.SINGLE
 430                                 | SWT.BORDER);
 431                 repositoryToCreate.setLayoutData(GridDataFactory.fillDefaults()
 432                                 .grab(true, false).span(1, 1).create());
 433                 repositoryToCreate.addListener(SWT.Modify, new Listener() {
 434                         @Override
 435                         public void handleEvent(Event e) {
 436                                 if (repositoryToCreate.getText().equals("")) { //$NON-NLS-1$
 437                                         createRepo.setEnabled(false);
 438                                         return;
 439                                 }
 440                                 IPath fromOSString = Path.fromOSString(repositoryToCreate
 441                                                 .getText());
 442                                 createRepo.setEnabled(minumumPath
 443                                                 .matchingFirstSegments(fromOSString) == fromOSString
 444                                                 .segmentCount());
 445                         }
 446                 });
 447                 dotGitSegment = new Label(parentRepoComposite, SWT.NONE);
 448                 dotGitSegment.setEnabled(false);
 449                 dotGitSegment.setText(File.separatorChar + Constants.DOT_GIT);
 450                 dotGitSegment.setLayoutData(GridDataFactory.fillDefaults()
 451                                 .align(SWT.LEFT, SWT.CENTER).create());
 452
 453                 tree.addSelectionListener(new SelectionAdapter() {
 454                         @Override
 455                         public void widgetSelected(SelectionEvent e) {
 456                                 tree.select((TreeItem) e.item);
 457                                 updateControls();
 458                         }
 459                 });
 460
 461                 Dialog.applyDialogFont(main);
 462                 setControl(main);
 463
 464                 if (allProjectsInExistingRepos) {
 465                         internalMode = true;
 466                         internalModeButton.setSelection(true);
 467                         updateControls();
 468                 }
 469         }
 470
 471         private void updateProjectTreeItem(TreeItem item, IProject project) {
 472                 item.setImage(0,
 473                                 PlatformUI.getWorkbench().getSharedImages()
 474                                                 .getImage(SharedImages.IMG_OBJ_PROJECT));
 475                 item.setText(0, project.getName());
 476         }
 477
 478         protected void setRelativePath(String directory) {
 479                 IPath folderPath = new Path(directory).setDevice(null);
 480                 IPath workdirPath = new Path(this.selectedRepository.getWorkTree()
 481                                 .getPath()).setDevice(null);
 482                 if (!workdirPath.isPrefixOf(folderPath)) {
 483                         MessageDialog.openError(getShell(),
 484                                         UIText.ExistingOrNewPage_WrongPathErrorDialogTitle,
 485                                         UIText.ExistingOrNewPage_WrongPathErrorDialogMessage);
 486                         return;
 487                 }
 488                 relPath.setText(folderPath.removeFirstSegments(
 489                                 workdirPath.segmentCount()).toString());
 490         }
 491
 492         protected void setRepository(Repository repository) {
 493                 if (repository == this.selectedRepository)
 494                         return;
 495                 this.selectedRepository = repository;
 496                 relPath.setText(""); //$NON-NLS-1$
 497         }
 498
 499         @Override
 500         public void setVisible(boolean visible) {
 501                 super.setVisible(visible);
 502                 if (visible)
 503                         updateControls();
 504         }
 505
 506         private void fillTreeItemWithGitDirectory(RepositoryMapping m,
 507                         TreeItem treeItem, boolean isAlternative) {
 508                 if (m.getGitDir() == null)
 509                         treeItem.setText(2,
 510                                         UIText.ExistingOrNewPage_SymbolicValueEmptyMapping);
 511                 else {
 512                         IPath relativePath = new Path(m.getGitDir());
 513                         if (isAlternative) {
 514                                 IPath withoutLastSegment = relativePath.removeLastSegments(1);
 515                                 IPath path;
 516                                 if (withoutLastSegment.isEmpty())
 517                                         path = Path.fromPortableString("."); //$NON-NLS-1$
 518                                 else
 519                                         path = withoutLastSegment;
 520                                 treeItem.setText(0, path.toString());
 521                         }
 522                         treeItem.setText(2, relativePath.toOSString());
 523                         try {
 524                                 IProject project = m.getContainer().getProject();
 525                                 Repository repo = new RepositoryBuilder().setGitDir(
 526                                                 m.getGitDirAbsolutePath().toFile()).build();
 527                                 File workTree = repo.getWorkTree();
 528                                 IPath workTreePath = Path.fromOSString(workTree
 529                                                 .getAbsolutePath());
 530                                 if (workTreePath.isPrefixOf(project.getLocation())) {
 531                                         IPath makeRelativeTo = project.getLocation()
 532                                                         .makeRelativeTo(workTreePath);
 533                                         String repoRelativePath = makeRelativeTo
 534                                                         .append("/.project").toPortableString(); //$NON-NLS-1$
 535                                         ObjectId headCommitId = repo.resolve(Constants.HEAD);
 536                                         if (headCommitId != null) {
 537                                                 // Not an empty repo
 538                                                 try (RevWalk revWalk = new RevWalk(repo)) {
 539                                                         RevCommit headCommit = revWalk
 540                                                                         .parseCommit(headCommitId);
 541                                                         RevTree headTree = headCommit.getTree();
 542                                                         TreeWalk projectInRepo = TreeWalk.forPath(repo,
 543                                                                         repoRelativePath, headTree);
 544                                                         if (projectInRepo != null) {
 545                                                                 // the .project file is tracked by this repo
 546                                                                 treeItem.setChecked(true);
 547                                                         }
 548                                                 }
 549                                         }
 550                                 }
 551                                 repo.close();
 552                         } catch (IOException e1) {
 553                                 Activator
 554                                                 .logError(
 555                                                                 UIText.ExistingOrNewPage_FailedToDetectRepositoryMessage,
 556                                                                 e1);
 557                         }
 558                 }
 559         }
 560
 561         protected void updateControls() {
 562                 setMessage(null);
 563                 setErrorMessage(null);
 564                 if (!internalMode) {
 565                         setDescription(UIText.ExistingOrNewPage_DescriptionExternalMode);
 566                         if (this.selectedRepository != null) {
 567                                 workDir.setText(this.selectedRepository.getWorkTree().getPath());
 568                                 String relativePath = relPath.getText();
 569                                 File testFile = new File(this.selectedRepository.getWorkTree(),
 570                                                 relativePath);
 571                                 if (!testFile.exists())
 572                                         setMessage(
 573                                                         NLS.bind(
 574                                                                         UIText.ExistingOrNewPage_FolderWillBeCreatedMessage,
 575                                                                         relativePath), IMessageProvider.WARNING);
 576                                 IPath targetPath = new Path(selectedRepository.getWorkTree()
 577                                                 .getPath());
 578                                 targetPath = targetPath.append(relPath.getText());
 579                                 moveProjectsLabelProvider.targetFolder = targetPath;
 580                                 projectMoveViewer.refresh(true);
 581                                 browseRepository.setEnabled(true);
 582                                 for (Object checked : projectMoveViewer.getCheckedElements()) {
 583                                         IProject prj = (IProject) checked;
 584                                         IPath projectMoveTarget = targetPath.append(prj.getName());
 585                                         boolean mustMove = !prj.getLocation().equals(
 586                                                         projectMoveTarget);
 587                                         File targetTest = new File(projectMoveTarget.toOSString());
 588                                         if (mustMove && targetTest.exists()) {
 589                                                 setErrorMessage(NLS
 590                                                                 .bind(UIText.ExistingOrNewPage_ExistingTargetErrorMessage,
 591                                                                                 prj.getName()));
 592                                                 break;
 593                                         }
 594                                         File parent = targetTest.getParentFile();
 595                                         while (parent != null) {
 596                                                 if (new File(parent, ".project").exists()) { //$NON-NLS-1$
 597                                                         setErrorMessage(NLS
 598                                                                         .bind(UIText.ExistingOrNewPage_NestedProjectErrorMessage,
 599                                                                                         new String[] { prj.getName(),
 600                                                                                                         targetTest.getPath(),
 601                                                                                                         parent.getPath() }));
 602                                                         break;
 603                                                 }
 604                                                 parent = parent.getParentFile();
 605                                         }
 606                                         // break after the first error
 607                                         if (getErrorMessage() != null)
 608                                                 break;
 609                                 }
 610                         } else
 611                                 workDir.setText(UIText.ExistingOrNewPage_NoRepositorySelectedMessage);
 612                         setPageComplete(getErrorMessage() == null
 613                                         && selectedRepository != null
 614                                         && projectMoveViewer.getCheckedElements().length > 0);
 615                 } else {
 616                         setDescription(UIText.ExistingOrNewPage_description);
 617                         IPath p = proposeNewRepositoryPath(tree.getSelection());
 618                         minumumPath = p;
 619                         if (p != null) {
 620                                 repositoryToCreate.setText(p.toOSString());
 621                         } else {
 622                                 repositoryToCreate.setText(""); //$NON-NLS-1$
 623                         }
 624                         createRepo.setEnabled(p != null);
 625                         repositoryToCreate.setEnabled(p != null);
 626                         dotGitSegment.setEnabled(p != null);
 627
 628                         boolean pageComplete = viewer.getCheckedElements().length > 0;
 629                         for (Object checkedElement : viewer.getCheckedElements()) {
 630                                 String path = ((ProjectAndRepo) checkedElement).getRepo();
 631                                 if (((ProjectAndRepo) checkedElement).getRepo() != null
 632                                                 && path.equals("")) { //$NON-NLS-1$
 633                                         pageComplete = false;
 634                                 }
 635                         }
 636                         setPageComplete(pageComplete);
 637                         // provide a warning if Repository is created in workspace
 638                         for (IProject project : myWizard.projects) {
 639                                 if (createRepo.isEnabled()
 640                                                 && ResourcesPlugin.getWorkspace().getRoot()
 641                                                                 .getLocation()
 642                                                                 .isPrefixOf(project.getLocation())) {
 643                                         setMessage(
 644                                                         UIText.ExistingOrNewPage_RepoCreationInWorkspaceCreationWarning,
 645                                                         IMessageProvider.WARNING);
 646                                         break;
 647                                 }
 648                         }
 649                 }
 650
 651                 externalComposite.setVisible(!internalMode);
 652                 parentRepoComposite.setVisible(internalMode);
 653                 GridData gd;
 654                 gd = (GridData) parentRepoComposite.getLayoutData();
 655                 gd.exclude = !internalMode;
 656
 657                 gd = (GridData) externalComposite.getLayoutData();
 658                 gd.exclude = internalMode;
 659
 660                 ((Composite) getControl()).layout(true);
 661         }
 662
 663         private static IPath proposeNewRepositoryPath(TreeItem[] treeItems) {
 664                 IPath p = null;
 665                 for (TreeItem ti : treeItems) {
 666                         String gitDirParentCandidate = ti.getText(1);
 667                         if (gitDirParentCandidate.equals("")) //$NON-NLS-1$
 668                                 continue;
 669                         if (ti.getItemCount() > 0)
 670                                 if (hasRepositoryInOwnDirectory(ti.getItems()))
 671                                         return null;
 672                         if (hasRepositoryInOwnDirectory(ti))
 673                                 return null;
 674                         IPath thisPath = Path.fromOSString(gitDirParentCandidate);
 675                         if (p == null)
 676                                 p = thisPath;
 677                         else {
 678                                 int n = p.matchingFirstSegments(thisPath);
 679                                 p = p.removeLastSegments(p.segmentCount() - n);
 680                         }
 681                 }
 682                 return p;
 683         }
 684
 685         private static boolean hasRepositoryInOwnDirectory(TreeItem... items) {
 686                 for (TreeItem item : items)
 687                         if (".git".equals(item.getText(2))) //$NON-NLS-1$
 688                                 return true;
 689                 return false;
 690         }
 691
 692         /**
 693          * @param checked
 694          *            pass true to get the checked elements, false to get the
 695          *            selected elements
 696          * @return map between project and repository root directory (converted to
 697          *         an absolute path) for all projects selected by user
 698          */
 699         public Map<IProject, File> getProjects(boolean checked) {
 700                 final Object[] elements;
 701                 if (!internalMode)
 702                         if (checked)
 703                                 elements = projectMoveViewer.getCheckedElements();
 704                         else {
 705                                 ISelection selection = viewer.getSelection();
 706                                 elements = ((IStructuredSelection) selection).toArray();
 707                         }
 708                 else if (checked)
 709                         elements = viewer.getCheckedElements();
 710                 else {
 711                         ISelection selection = viewer.getSelection();
 712                         if (selection instanceof IStructuredSelection)
 713                                 elements = ((IStructuredSelection) selection).toArray();
 714                         else
 715                                 elements = new Object[0];
 716                 }
 717
 718                 Map<IProject, File> ret = new HashMap<IProject, File>(elements.length);
 719                 for (Object ti : elements) {
 720                         if (!internalMode) {
 721                                 File workdir = selectedRepository.getWorkTree();
 722                                 IProject project = (IProject) ti;
 723                                 IPath targetLocation = new Path(relPath.getText())
 724                                                 .append(project.getName());
 725                                 File targetFile = new File(workdir, targetLocation.toOSString());
 726                                 ret.put(project, targetFile);
 727
 728                         } else {
 729                                 final IProject project = ((ProjectAndRepo) ti).getProject();
 730                                 String path = ((ProjectAndRepo) ti).getRepo();
 731                                 final IPath selectedRepo = Path.fromOSString(path);
 732                                 IPath localPathToRepo = selectedRepo;
 733                                 if (!selectedRepo.isAbsolute()) {
 734                                         localPathToRepo = project.getLocation()
 735                                                         .append(selectedRepo);
 736                                 }
 737                                 ret.put(project, localPathToRepo.toFile());
 738                         }
 739                 }
 740                 return ret;
 741         }
 742
 743         public boolean getInternalMode() {
 744                 return internalMode;
 745         }
 746
 747         private static class ProjectAndRepo {
 748                 private IProject project;
 749
 750                 private String repo;
 751
 752                 public ProjectAndRepo(IProject project, String repo) {
 753                         this.project = project;
 754                         this.repo = repo;
 755                 }
 756
 757                 public IProject getProject() {
 758                         return project;
 759                 }
 760
 761                 public String getRepo() {
 762                         return repo;
 763                 }
 764         }
 765
 766         public Repository getSelectedRepsoitory() {
 767                 return selectedRepository;
 768         }
 769 }