BranchTrackingStatus.java
- /*
- * Copyright (C) 2011, Robin Stocker <robin@nibor.org>
- * Copyright (C) 2012, Matthias Sohn <matthias.sohn@sap.com>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- package org.eclipse.jgit.lib;
- import java.io.IOException;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.revwalk.RevWalk;
- import org.eclipse.jgit.revwalk.RevWalkUtils;
- import org.eclipse.jgit.revwalk.filter.RevFilter;
- /**
- * Status of a branch's relation to its remote-tracking branch.
- */
- public class BranchTrackingStatus {
- /**
- * Compute the tracking status for the <code>branchName</code> in
- * <code>repository</code>.
- *
- * @param repository
- * the git repository to compute the status from
- * @param branchName
- * the local branch
- * @return the tracking status, or null if it is not known
- * @throws java.io.IOException
- */
- public static BranchTrackingStatus of(Repository repository, String branchName)
- throws IOException {
- String shortBranchName = Repository.shortenRefName(branchName);
- String fullBranchName = Constants.R_HEADS + shortBranchName;
- BranchConfig branchConfig = new BranchConfig(repository.getConfig(),
- shortBranchName);
- String trackingBranch = branchConfig.getTrackingBranch();
- if (trackingBranch == null)
- return null;
- Ref tracking = repository.exactRef(trackingBranch);
- if (tracking == null)
- return null;
- Ref local = repository.exactRef(fullBranchName);
- if (local == null)
- return null;
- try (RevWalk walk = new RevWalk(repository)) {
- RevCommit localCommit = walk.parseCommit(local.getObjectId());
- RevCommit trackingCommit = walk.parseCommit(tracking.getObjectId());
- walk.setRevFilter(RevFilter.MERGE_BASE);
- walk.markStart(localCommit);
- walk.markStart(trackingCommit);
- RevCommit mergeBase = walk.next();
- walk.reset();
- walk.setRevFilter(RevFilter.ALL);
- int aheadCount = RevWalkUtils.count(walk, localCommit, mergeBase);
- int behindCount = RevWalkUtils.count(walk, trackingCommit,
- mergeBase);
- return new BranchTrackingStatus(trackingBranch, aheadCount,
- behindCount);
- }
- }
- private final String remoteTrackingBranch;
- private final int aheadCount;
- private final int behindCount;
- private BranchTrackingStatus(String remoteTrackingBranch, int aheadCount,
- int behindCount) {
- this.remoteTrackingBranch = remoteTrackingBranch;
- this.aheadCount = aheadCount;
- this.behindCount = behindCount;
- }
- /**
- * Get full remote-tracking branch name
- *
- * @return full remote-tracking branch name
- */
- public String getRemoteTrackingBranch() {
- return remoteTrackingBranch;
- }
- /**
- * Get number of commits that the local branch is ahead of the
- * remote-tracking branch
- *
- * @return number of commits that the local branch is ahead of the
- * remote-tracking branch
- */
- public int getAheadCount() {
- return aheadCount;
- }
- /**
- * Get number of commits that the local branch is behind of the
- * remote-tracking branch
- *
- * @return number of commits that the local branch is behind of the
- * remote-tracking branch
- */
- public int getBehindCount() {
- return behindCount;
- }
- }