org.eclipse.egit.core.op.UntrackOperation.java Source code

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Here is the source code for org.eclipse.egit.core.op.UntrackOperation.java

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/*******************************************************************************
 * Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
 * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
 * Copyright (C) 2008, Google Inc.
 *
 * 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.core.op;

import java.io.IOException;
import java.util.Collection;
import java.util.IdentityHashMap;
import java.util.Map;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.core.runtime.jobs.MultiRule;
import org.eclipse.egit.core.Activator;
import org.eclipse.egit.core.CoreText;
import org.eclipse.egit.core.project.GitProjectData;
import org.eclipse.egit.core.project.RepositoryMapping;
import org.eclipse.jgit.dircache.DirCacheEditor;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.osgi.util.NLS;

/**
 * Remove one or more existing files/folders from the Git repository.
 * <p>
 * Accepts a collection of resources (files and/or directories) which should be
 * removed from the their corresponding Git repositories. Resources in the
 * collection can be associated with multiple repositories. The operation will
 * automatically remove each resource from the correct Git repository.
 * </p>
 * <p>
 * Resources are only scheduled for removal in the index-
 * </p>
 */
public class UntrackOperation implements IEGitOperation {
    private final Collection<? extends IResource> rsrcList;

    private final IdentityHashMap<Repository, DirCacheEditor> edits;

    private final IdentityHashMap<RepositoryMapping, Object> mappings;

    /**
     * Create a new operation to stop tracking existing files/folders.
     *
     * @param rsrcs
     *            collection of {@link IResource}s which should be removed from
     *            the relevant Git repositories.
     */
    public UntrackOperation(final Collection<? extends IResource> rsrcs) {
        rsrcList = rsrcs;
        edits = new IdentityHashMap<Repository, DirCacheEditor>();
        mappings = new IdentityHashMap<RepositoryMapping, Object>();
    }

    /* (non-Javadoc)
     * @see org.eclipse.egit.core.op.IEGitOperation#execute(org.eclipse.core.runtime.IProgressMonitor)
     */
    public void execute(IProgressMonitor m) throws CoreException {
        IProgressMonitor monitor;
        if (m == null)
            monitor = new NullProgressMonitor();
        else
            monitor = m;

        edits.clear();
        mappings.clear();

        monitor.beginTask(CoreText.UntrackOperation_adding, rsrcList.size() * 200);
        try {
            for (IResource obj : rsrcList) {
                remove(obj);
                monitor.worked(200);
            }

            for (Map.Entry<Repository, DirCacheEditor> e : edits.entrySet()) {
                final Repository db = e.getKey();
                final DirCacheEditor editor = e.getValue();
                monitor.setTaskName(NLS.bind(CoreText.UntrackOperation_writingIndex, db.getDirectory()));
                editor.commit();
            }
        } catch (RuntimeException e) {
            throw new CoreException(Activator.error(CoreText.UntrackOperation_failed, e));
        } catch (IOException e) {
            throw new CoreException(Activator.error(CoreText.UntrackOperation_failed, e));
        } finally {
            for (final RepositoryMapping rm : mappings.keySet())
                rm.fireRepositoryChanged();
            edits.clear();
            mappings.clear();
            monitor.done();
        }
    }

    /* (non-Javadoc)
     * @see org.eclipse.egit.core.op.IEGitOperation#getSchedulingRule()
     */
    public ISchedulingRule getSchedulingRule() {
        return new MultiRule(rsrcList.toArray(new IResource[rsrcList.size()]));
    }

    private void remove(final IResource path) throws CoreException {
        final IProject proj = path.getProject();
        final GitProjectData pd = GitProjectData.get(proj);
        if (pd == null)
            return;
        final RepositoryMapping rm = pd.getRepositoryMapping(path);
        if (rm == null)
            return;
        final Repository db = rm.getRepository();

        DirCacheEditor e = edits.get(db);
        if (e == null) {
            try {
                e = db.lockDirCache().editor();
            } catch (IOException err) {
                throw new CoreException(Activator.error(CoreText.UntrackOperation_failed, err));
            }
            edits.put(db, e);
            mappings.put(rm, rm);
        }

        if (path instanceof IContainer)
            e.add(new DirCacheEditor.DeleteTree(rm.getRepoRelativePath(path)));
        else
            e.add(new DirCacheEditor.DeletePath(rm.getRepoRelativePath(path)));
    }
}