org.eclipse.releng.tools.git.GitCopyrightAdapter.java Source code

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Here is the source code for org.eclipse.releng.tools.git.GitCopyrightAdapter.java

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/*******************************************************************************
 * Copyright (c) 2010, 2012 AGETO Service GmbH and others.
 * 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.
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation of CVS adapter
 *     Gunnar Wagenknecht - initial API and implementation of Git adapter
 *     IBM Corporation - ongoing maintenance
 *******************************************************************************/
package org.eclipse.releng.tools.git;

import java.io.IOException;
import java.util.Calendar;

import org.eclipse.egit.core.project.RepositoryMapping;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.treewalk.filter.AndTreeFilter;
import org.eclipse.jgit.treewalk.filter.PathFilter;
import org.eclipse.jgit.treewalk.filter.TreeFilter;
import org.eclipse.osgi.util.NLS;
import org.eclipse.releng.tools.RelEngPlugin;
import org.eclipse.releng.tools.RepositoryProviderCopyrightAdapter;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;

public class GitCopyrightAdapter extends RepositoryProviderCopyrightAdapter {

    private static String filterString = "copyright"; // lowercase //$NON-NLS-1$

    public GitCopyrightAdapter(IResource[] resources) {
        super(resources);
    }

    public int getLastModifiedYear(IFile file, IProgressMonitor monitor) throws CoreException {
        try {
            monitor.beginTask("Fetching logs from Git", 100); //$NON-NLS-1$
            final RepositoryMapping mapping = RepositoryMapping.getMapping(file);
            if (mapping != null) {
                final Repository repo = mapping.getRepository();
                if (repo != null) {
                    RevWalk walk = null;
                    try {
                        final ObjectId start = repo.resolve(Constants.HEAD);
                        walk = new RevWalk(repo);
                        walk.setTreeFilter(AndTreeFilter
                                .create(PathFilter.create(mapping.getRepoRelativePath(file)), TreeFilter.ANY_DIFF));
                        walk.markStart(walk.lookupCommit(start));
                        final RevCommit commit = walk.next();
                        if (commit != null) {
                            if (filterString != null
                                    && commit.getFullMessage().toLowerCase().indexOf(filterString) != -1) {
                                // the last update was a copyright check in - ignore
                                return 0;
                            }

                            boolean isSWT = file.getProject().getName().startsWith("org.eclipse.swt"); //$NON-NLS-1$
                            String logComment = commit.getFullMessage();
                            if (isSWT && (logComment.indexOf("restore HEAD after accidental deletion") != -1 //$NON-NLS-1$
                                    || logComment.indexOf("fix permission of files") != -1)) { //$NON-NLS-1$
                                // ignore commits with above comments
                                return 0;
                            }

                            boolean isPlatform = file.getProject().getName().equals("eclipse.platform"); //$NON-NLS-1$
                            if (isPlatform && (logComment
                                    .indexOf("Merge in ant and update from origin/master") != -1 //$NON-NLS-1$
                                    || logComment.indexOf(
                                            "Fixed bug 381684: Remove update from repository and map files") != -1 //$NON-NLS-1$
                                    || logComment.indexOf("Restored 'org.eclipse.update.core'") != -1)) { //$NON-NLS-1$
                                // ignore commits with above comments
                                return 0;
                            }

                            final Calendar calendar = Calendar.getInstance();
                            calendar.setTimeInMillis(0);
                            calendar.add(Calendar.SECOND, commit.getCommitTime());
                            return calendar.get(Calendar.YEAR);
                        }
                    } catch (final IOException e) {
                        throw new CoreException(new Status(IStatus.ERROR, RelEngPlugin.ID, 0,
                                NLS.bind("An error occured when processing {0}", file.getName()), e));
                    } finally {
                        if (walk != null)
                            walk.release();
                    }
                }
            }
        } finally {
            monitor.done();
        }
        return -1;
    }

    public void initialize(IProgressMonitor monitor) throws CoreException {
        // TODO We should perform a bulk "log" command to get the last modified
        // year
    }

}