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- /*
- * Copyright (C) 2012, GitHub Inc.
- * 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.api;
-
- import java.io.IOException;
- import java.text.MessageFormat;
-
- import org.eclipse.jgit.api.errors.GitAPIException;
- import org.eclipse.jgit.api.errors.InvalidRefNameException;
- import org.eclipse.jgit.api.errors.JGitInternalException;
- import org.eclipse.jgit.api.errors.NoHeadException;
- import org.eclipse.jgit.api.errors.StashApplyFailureException;
- import org.eclipse.jgit.api.errors.WrongRepositoryStateException;
- import org.eclipse.jgit.dircache.DirCache;
- import org.eclipse.jgit.dircache.DirCacheBuilder;
- import org.eclipse.jgit.dircache.DirCacheCheckout;
- import org.eclipse.jgit.dircache.DirCacheEntry;
- import org.eclipse.jgit.dircache.DirCacheIterator;
- import org.eclipse.jgit.internal.JGitText;
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.lib.ObjectId;
- import org.eclipse.jgit.lib.ObjectReader;
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.lib.RepositoryState;
- import org.eclipse.jgit.merge.MergeStrategy;
- import org.eclipse.jgit.merge.ResolveMerger;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.revwalk.RevTree;
- import org.eclipse.jgit.revwalk.RevWalk;
- import org.eclipse.jgit.treewalk.AbstractTreeIterator;
- import org.eclipse.jgit.treewalk.FileTreeIterator;
- import org.eclipse.jgit.treewalk.TreeWalk;
-
- /**
- * Command class to apply a stashed commit.
- *
- * This class behaves like <em>git stash apply --index</em>, i.e. it tries to
- * recover the stashed index state in addition to the working tree state.
- *
- * @see <a href="http://www.kernel.org/pub/software/scm/git/docs/git-stash.html"
- * >Git documentation about Stash</a>
- *
- * @since 2.0
- */
- public class StashApplyCommand extends GitCommand<ObjectId> {
-
- private static final String DEFAULT_REF = Constants.STASH + "@{0}"; //$NON-NLS-1$
-
- private String stashRef;
-
- private boolean applyIndex = true;
-
- /**
- * Create command to apply the changes of a stashed commit
- *
- * @param repo
- */
- public StashApplyCommand(final Repository repo) {
- super(repo);
- }
-
- /**
- * Set the stash reference to apply
- * <p>
- * This will default to apply the latest stashed commit (stash@{0}) if
- * unspecified
- *
- * @param stashRef
- * @return {@code this}
- */
- public StashApplyCommand setStashRef(final String stashRef) {
- this.stashRef = stashRef;
- return this;
- }
-
- private ObjectId getStashId() throws GitAPIException {
- final String revision = stashRef != null ? stashRef : DEFAULT_REF;
- final ObjectId stashId;
- try {
- stashId = repo.resolve(revision);
- } catch (IOException e) {
- throw new InvalidRefNameException(MessageFormat.format(
- JGitText.get().stashResolveFailed, revision), e);
- }
- if (stashId == null)
- throw new InvalidRefNameException(MessageFormat.format(
- JGitText.get().stashResolveFailed, revision));
- return stashId;
- }
-
- /**
- * Apply the changes in a stashed commit to the working directory and index
- *
- * @return id of stashed commit that was applied TODO: Does anyone depend on
- * this, or could we make it more like Merge/CherryPick/Revert?
- * @throws GitAPIException
- * @throws WrongRepositoryStateException
- * @throws NoHeadException
- * @throws StashApplyFailureException
- */
- public ObjectId call() throws GitAPIException,
- WrongRepositoryStateException, NoHeadException,
- StashApplyFailureException {
- checkCallable();
-
- if (repo.getRepositoryState() != RepositoryState.SAFE)
- throw new WrongRepositoryStateException(MessageFormat.format(
- JGitText.get().stashApplyOnUnsafeRepository,
- repo.getRepositoryState()));
-
- ObjectReader reader = repo.newObjectReader();
- try {
- RevWalk revWalk = new RevWalk(reader);
-
- ObjectId headCommit = repo.resolve(Constants.HEAD);
- if (headCommit == null)
- throw new NoHeadException(JGitText.get().stashApplyWithoutHead);
-
- final ObjectId stashId = getStashId();
- RevCommit stashCommit = revWalk.parseCommit(stashId);
- if (stashCommit.getParentCount() != 2)
- throw new JGitInternalException(MessageFormat.format(
- JGitText.get().stashCommitMissingTwoParents,
- stashId.name()));
-
- ObjectId headTree = repo.resolve(Constants.HEAD + "^{tree}");
- ObjectId stashIndexCommit = revWalk.parseCommit(stashCommit
- .getParent(1));
- ObjectId stashHeadCommit = stashCommit.getParent(0);
-
- ResolveMerger merger = (ResolveMerger) MergeStrategy.RECURSIVE
- .newMerger(repo);
- merger.setCommitNames(new String[] { "stashed HEAD", "HEAD",
- "stash" });
- merger.setBase(stashHeadCommit);
- merger.setWorkingTreeIterator(new FileTreeIterator(repo));
- if (merger.merge(headCommit, stashCommit)) {
- DirCache dc = repo.lockDirCache();
- DirCacheCheckout dco = new DirCacheCheckout(repo, headTree,
- dc, merger.getResultTreeId());
- dco.setFailOnConflict(true);
- dco.checkout(); // Ignoring failed deletes....
- if (applyIndex) {
- ResolveMerger ixMerger = (ResolveMerger) MergeStrategy.RECURSIVE
- .newMerger(repo, true);
- ixMerger.setCommitNames(new String[] { "stashed HEAD",
- "HEAD", "stashed index" });
- boolean ok = ixMerger.merge(headCommit, stashIndexCommit);
- if (ok) {
- resetIndex(revWalk
- .parseTree(ixMerger.getResultTreeId()));
- } else {
- throw new StashApplyFailureException(
- JGitText.get().stashApplyConflict);
- }
- }
- } else {
- throw new StashApplyFailureException(
- JGitText.get().stashApplyConflict);
- }
- return stashId;
-
- } catch (JGitInternalException e) {
- throw e;
- } catch (IOException e) {
- throw new JGitInternalException(JGitText.get().stashApplyFailed, e);
- } finally {
- reader.release();
- }
- }
-
- /**
- * @param applyIndex
- * true (default) if the command should restore the index state
- */
- public void setApplyIndex(boolean applyIndex) {
- this.applyIndex = applyIndex;
- }
-
- private void resetIndex(RevTree tree) throws IOException {
- DirCache dc = repo.lockDirCache();
- TreeWalk walk = null;
- try {
- DirCacheBuilder builder = dc.builder();
-
- walk = new TreeWalk(repo);
- walk.addTree(tree);
- walk.addTree(new DirCacheIterator(dc));
- walk.setRecursive(true);
-
- while (walk.next()) {
- AbstractTreeIterator cIter = walk.getTree(0,
- AbstractTreeIterator.class);
- if (cIter == null) {
- // Not in commit, don't add to new index
- continue;
- }
-
- final DirCacheEntry entry = new DirCacheEntry(walk.getRawPath());
- entry.setFileMode(cIter.getEntryFileMode());
- entry.setObjectIdFromRaw(cIter.idBuffer(), cIter.idOffset());
-
- DirCacheIterator dcIter = walk.getTree(1,
- DirCacheIterator.class);
- if (dcIter != null && dcIter.idEqual(cIter)) {
- DirCacheEntry indexEntry = dcIter.getDirCacheEntry();
- entry.setLastModified(indexEntry.getLastModified());
- entry.setLength(indexEntry.getLength());
- }
-
- builder.add(entry);
- }
-
- builder.commit();
- } finally {
- dc.unlock();
- if (walk != null)
- walk.release();
- }
- }
- }
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