| /* |
| * Copyright (C) 2011, Robin Stocker <robin@nibor.org> |
| * Copyright (C) 2012, Matthias Sohn <matthias.sohn@sap.com> and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| 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 |
| * if an IO error occurred |
| */ |
| 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; |
| } |
| } |