/*******************************************************************************
* Copyright (c) 2011, 2014 IBM Corporation 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
*******************************************************************************/
package org.eclipse.orion.server.git.objects;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.merge.ResolveMerger;
import org.eclipse.jgit.merge.ThreeWayMerger;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.orion.server.core.ProtocolConstants;
import org.eclipse.orion.server.core.resources.Property;
import org.eclipse.orion.server.core.resources.ResourceShape;
import org.eclipse.orion.server.core.resources.annotations.PropertyDescription;
import org.eclipse.orion.server.core.resources.annotations.ResourceDescription;
import org.eclipse.orion.server.git.BaseToCloneConverter;
import org.eclipse.orion.server.git.GitConstants;
import org.eclipse.orion.server.git.servlets.GitServlet;
import org.eclipse.orion.server.git.servlets.GitUtils;
import org.eclipse.osgi.util.NLS;
import org.json.JSONException;
import org.json.JSONObject;
@ResourceDescription(type = Diff.TYPE)
public class Diff extends GitObject {
public static final String RESOURCE = "diff"; //$NON-NLS-1$
public static final String TYPE = "Diff"; //$NON-NLS-1$
private static final ResourceShape DEFAULT_RESOURCE_SHAPE = new ResourceShape();
{
Property[] defaultProperties = new Property[] { //
new Property(ProtocolConstants.KEY_LOCATION), // super
new Property(GitConstants.KEY_CLONE), // super
new Property(GitConstants.KEY_COMMIT_OLD), //
new Property(GitConstants.KEY_COMMIT_NEW), //
new Property(GitConstants.KEY_COMMIT_BASE) };
DEFAULT_RESOURCE_SHAPE.setProperties(defaultProperties);
}
private URI baseLocation;
public Diff(URI baseLocation, Repository db) throws URISyntaxException, CoreException {
super(BaseToCloneConverter.getCloneLocation(baseLocation, BaseToCloneConverter.DIFF), db);
this.baseLocation = baseLocation;
}
@Override
public JSONObject toJSON() throws JSONException, URISyntaxException, IOException, CoreException {
return jsonSerializer.serialize(this, DEFAULT_RESOURCE_SHAPE);
}
@Override
protected URI getLocation() throws URISyntaxException {
return baseLocation;
}
@PropertyDescription(name = GitConstants.KEY_COMMIT_OLD)
private URI getOldLocation() throws URISyntaxException {
IPath path = new Path(baseLocation.getPath()).removeFirstSegments(2);
return getOldLocation(baseLocation, path);
}
private URI getOldLocation(URI location, IPath path) throws URISyntaxException {
String scope = path.segment(0);
if (scope.contains("..")) { //$NON-NLS-1$
String[] commits = scope.split("\\.\\."); //$NON-NLS-1$
if (commits.length != 2) {
throw new IllegalArgumentException(NLS.bind("Illegal scope format, expected {old}..{new}, was {0}", scope));
}
IPath p = new Path(GitServlet.GIT_URI + '/' + Commit.RESOURCE).append(commits[0]).append(path.removeFirstSegments(1));
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), p.toString(), "parts=body", null); //$NON-NLS-1$
} else if (scope.equals(GitConstants.KEY_DIFF_CACHED)) {
IPath p = new Path(GitServlet.GIT_URI + '/' + Commit.RESOURCE).append(Constants.HEAD).append(path.removeFirstSegments(1));
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), p.toString(), "parts=body", null); //$NON-NLS-1$
} else if (scope.equals(GitConstants.KEY_DIFF_DEFAULT)) {
IPath p = new Path(GitServlet.GIT_URI + '/' + Index.RESOURCE).append(path.removeFirstSegments(1));
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), p.toString(), null, null);
} else {
IPath p = new Path(GitServlet.GIT_URI + '/' + Commit.RESOURCE).append(scope).append(path.removeFirstSegments(1));
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), p.toString(), "parts=body", null); //$NON-NLS-1$
}
}
@PropertyDescription(name = GitConstants.KEY_COMMIT_NEW)
private URI getNewLocation() throws URISyntaxException {
IPath path = new Path(baseLocation.getPath()).removeFirstSegments(2);
return getNewLocation(baseLocation, path);
}
private URI getNewLocation(URI location, IPath path) throws URISyntaxException {
String scope = path.segment(0);
if (scope.contains("..")) { //$NON-NLS-1$
String[] commits = scope.split("\\.\\."); //$NON-NLS-1$
if (commits.length != 2) {
throw new IllegalArgumentException(NLS.bind("Illegal scope format, expected {old}..{new}, was {0}", scope));
}
IPath p = new Path(GitServlet.GIT_URI + '/' + Commit.RESOURCE).append(commits[1]).append(path.removeFirstSegments(1));
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), p.toString(), "parts=body", null); //$NON-NLS-1$
} else if (scope.equals(GitConstants.KEY_DIFF_CACHED)) {
IPath p = new Path(GitServlet.GIT_URI + '/' + Index.RESOURCE).append(path.removeFirstSegments(1));
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), p.toString(), null, null);
} else {
/* including scope.equals(GitConstants.KEY_DIFF_DEFAULT */
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), path.removeFirstSegments(1).makeAbsolute()
.toString(), null, null);
}
}
@PropertyDescription(name = GitConstants.KEY_COMMIT_BASE)
private URI getBaseLocation() throws URISyntaxException, IOException {
IPath path = new Path(baseLocation.getPath()).removeFirstSegments(2);
return getBaseLocation(baseLocation, db, path);
}
private URI getBaseLocation(URI location, Repository db, IPath path) throws URISyntaxException, IOException {
String scope = path.segment(0);
if (scope.contains("..")) { //$NON-NLS-1$
String[] commits = scope.split("\\.\\."); //$NON-NLS-1$
if (commits.length != 2) {
throw new IllegalArgumentException(NLS.bind("Illegal scope format, expected {old}..{new}, was {0}", scope));
}
ThreeWayMerger merger = new ResolveMerger(db) {
@Override
protected boolean mergeImpl() throws IOException {
// do nothing
return false;
}
};
// use #merge to set sourceObjects
String tip0 = GitUtils.decode(commits[0]);
String tip1 = GitUtils.decode(commits[1]);
merger.merge(new ObjectId[] { db.resolve(tip0), db.resolve(tip1) });
RevCommit baseCommit = merger.getBaseCommit(0, 1);
IPath p = new Path(GitServlet.GIT_URI + '/' + Commit.RESOURCE).append(baseCommit.getId().getName()).append(path.removeFirstSegments(1));
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), p.toString(), "parts=body", null); //$NON-NLS-1$
} else if (scope.equals(GitConstants.KEY_DIFF_CACHED)) {
// HEAD is the base
IPath p = new Path(GitServlet.GIT_URI + '/' + Commit.RESOURCE).append(Constants.HEAD).append(path.removeFirstSegments(1));
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), p.toString(), "parts=body", null); //$NON-NLS-1$
} else {
// index is the base
IPath p = new Path(GitServlet.GIT_URI + '/' + Index.RESOURCE).append(path.removeFirstSegments(1));
return new URI(location.getScheme(), location.getUserInfo(), location.getHost(), location.getPort(), p.toString(), null, null);
}
}
}