org.eclipse.egit.ui.internal.history.command.ImportChangedProjectsCommand.java Source code

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Here is the source code for org.eclipse.egit.ui.internal.history.command.ImportChangedProjectsCommand.java

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/******************************************************************************
 *  Copyright (c) 2014, Tobias Melcher <tobias.melcher@sap.com>,
 *                      Felix Otto <felix.otto@sap.com>
 *
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 *****************************************************************************/
package org.eclipse.egit.ui.internal.history.command;

import java.io.File;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.resources.WorkspaceJob;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Status;
import org.eclipse.egit.ui.Activator;
import org.eclipse.egit.ui.internal.UIText;
import org.eclipse.egit.ui.internal.commit.RepositoryCommit;
import org.eclipse.egit.ui.internal.history.FileDiff;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;

/**
 * Imports the projects changed by (a) given commit(s).
 *
 * Loops over all changed files of a revision to find the enclosing projects and
 * imports them.
 */
@SuppressWarnings("restriction")
public class ImportChangedProjectsCommand extends AbstractHistoryCommandHandler {

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        Repository repository = getRepository(event);
        Set<File> changedFiles = new HashSet<>();

        List<RevCommit> commits = getSelectedCommits(event);
        for (RevCommit commit : commits) {
            RepositoryCommit repoCommit = new RepositoryCommit(repository, commit);
            changedFiles.addAll(determineChangedFilesOfCommit(repoCommit));
        }
        Set<File> dotProjectFiles = findDotProjectFiles(changedFiles, repository);
        importProjects(dotProjectFiles);
        return null;
    }

    private Set<File> determineChangedFilesOfCommit(RepositoryCommit repoCommit) {
        Set<File> changedFilesOfCommit = new HashSet<>();
        File rootOfWorkingDirectory = repoCommit.getRepository().getWorkTree();

        FileDiff[] fileDiffs = repoCommit.getDiffs();
        for (FileDiff fileDiff : fileDiffs) {
            // in case of brand new files there is no old path
            addIfNotDevNull(changedFilesOfCommit, rootOfWorkingDirectory, fileDiff.getNewPath());
            // in case of deletions there is no new path
            addIfNotDevNull(changedFilesOfCommit, rootOfWorkingDirectory, fileDiff.getOldPath());
        }
        return changedFilesOfCommit;
    }

    private void addIfNotDevNull(Set<File> changedFilesOfCommit, File rootOfWorkingDirectory,
            String relativePathOfChangedFile) {
        if (!relativePathOfChangedFile.contains("/dev/null")) { //$NON-NLS-1$
            changedFilesOfCommit.add(new File(rootOfWorkingDirectory, relativePathOfChangedFile));
        }
    }

    private Set<File> findDotProjectFiles(Set<File> changedFiles, Repository repository) {
        Set<File> result = new HashSet<>();
        String workingTreeRootPath = repository.getWorkTree().toString();
        for (File changedFile : changedFiles) {
            File projectFile = searchEnclosingProjectInWorkDir(changedFile.getParentFile().getAbsoluteFile(),
                    workingTreeRootPath);
            if (projectFile != null)
                result.add(projectFile);
        }
        return result;
    }

    private File searchEnclosingProjectInWorkDir(File startFolder, String workingTreeRootPath) {
        File projectFile = null;
        File currentPath = startFolder;

        while (currentPath.toString().startsWith(workingTreeRootPath)) {
            projectFile = new File(currentPath.toString() + File.separator + ".project"); //$NON-NLS-1$
            if (projectFile.isFile())
                break;
            projectFile = null;
            currentPath = currentPath.getParentFile();
        }
        return projectFile;
    }

    private void importProjects(final Set<File> dotProjectFiles) {
        WorkspaceJob job = new WorkspaceJob(UIText.ImportChangedProjectsCommand_ImportingChangedProjects) {

            @Override
            public IStatus runInWorkspace(IProgressMonitor monitor) throws CoreException {
                for (File f : dotProjectFiles) {
                    if (monitor.isCanceled())
                        return Status.CANCEL_STATUS;
                    String ap = f.getAbsolutePath();
                    importProject(ap);
                }
                return Status.OK_STATUS;
            }
        };
        job.schedule();
    }

    private void importProject(String path) {
        try {
            IProjectDescription description = IDEWorkbenchPlugin.getPluginWorkspace()
                    .loadProjectDescription(new org.eclipse.core.runtime.Path(path));
            if (description != null) {
                String projectName = description.getName();
                IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(projectName);
                if (project.exists() == true) {
                    if (project.isOpen() == false)
                        project.open(IResource.BACKGROUND_REFRESH, new NullProgressMonitor());
                } else {
                    project.create(description, new NullProgressMonitor());
                    project.open(IResource.BACKGROUND_REFRESH, new NullProgressMonitor());
                }
            }
        } catch (CoreException e) {
            Activator.error(e.getMessage(), e);
        }
    }
}