/*
* Copyright (C) 2010, Christian Halstrick <christian.halstrick@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.
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package org.eclipse.jgit.api;
import java.io.IOException;
import java.text.MessageFormat;
import java.util.LinkedList;
import java.util.List;
import org.eclipse.jgit.JGitText;
import org.eclipse.jgit.dircache.DirCache;
import org.eclipse.jgit.errors.UnmergedPathException;
import org.eclipse.jgit.lib.Commit;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryState;
import org.eclipse.jgit.lib.RefUpdate.Result;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
/**
* A class used to execute a {@code Commit} command. It has setters for all
* supported options and arguments of this command and a {@link #call()} method
* to finally execute the command.
*
* @see <a
* href="http://www.kernel.org/pub/software/scm/git/docs/git-commit.html"
* >Git documentation about Commit</a>
*/
public class CommitCommand extends GitCommand<RevCommit> {
private PersonIdent author;
private PersonIdent committer;
private String message;
private boolean all;
/**
* parents this commit should have. The current HEAD will be in this list
* and also all commits mentioned in .git/MERGE_HEAD
*/
private List<ObjectId> parents = new LinkedList<ObjectId>();
/**
* @param repo
*/
protected CommitCommand(Repository repo) {
super(repo);
}
/**
* Executes the {@code commit} command with all the options and parameters
* collected by the setter methods of this class. Each instance of this
* class should only be used for one invocation of the command (means: one
* call to {@link #call()})
*
* @return a {@link Commit} object representing the successful commit
* @throws NoHeadException
* when called on a git repo without a HEAD reference
* @throws NoMessageException
* when called without specifying a commit message
* @throws UnmergedPathException
* when the current index contained unmerged pathes (conflicts)
* @throws WrongRepositoryStateException
* when repository is not in the right state for committing
* @throws JGitInternalException
* a low-level exception of JGit has occurred. The original
* exception can be retrieved by calling
* {@link Exception#getCause()}. Expect only
* {@code IOException's} to be wrapped. Subclasses of
* {@link IOException} (e.g. {@link UnmergedPathException}) are
* typically not wrapped here but thrown as original exception
*/
public RevCommit call() throws NoHeadException, NoMessageException,
UnmergedPathException, ConcurrentRefUpdateException,
JGitInternalException, WrongRepositoryStateException {
checkCallable();
RepositoryState state = repo.getRepositoryState();
if (!state.canCommit())
throw new WrongRepositoryStateException(MessageFormat.format(
JGitText.get().cannotCommitOnARepoWithState, state.name()));
processOptions(state);
try {
if (all && !repo.isBare() && repo.getWorkTree() != null) {
Git git = new Git(repo);
try {
git.add()
.addFilepattern(".")
.setUpdate(true).call();
} catch (NoFilepatternException e) {
// should really not happen
throw new JGitInternalException(e.getMessage(), e);
}
}
Ref head = repo.getRef(Constants.HEAD);
if (head == null)
throw new NoHeadException(
JGitText.get().commitOnRepoWithoutHEADCurrentlyNotSupported);
// determine the current HEAD and the commit it is referring to
ObjectId headId = repo.resolve(Constants.HEAD + "^{commit}");
if (headId != null)
parents.add(0, headId);
// lock the index
DirCache index = repo.lockDirCache();
try {
ObjectInserter odi = repo.newObjectInserter();
try {
// Write the index as tree to the object database. This may
// fail for example when the index contains unmerged paths
// (unresolved conflicts)
ObjectId indexTreeId = index.writeTree(odi);
// Create a Commit object, populate it and write it
Commit commit = new Commit(repo);
commit.setCommitter(committer);
commit.setAuthor(author);
commit.setMessage(message);
commit.setParentIds(parents.toArray(new ObjectId[] {}));
commit.setTreeId(indexTreeId);
ObjectId commitId = odi.insert(Constants.OBJ_COMMIT, odi
.format(commit));
odi.flush();
RevWalk revWalk = new RevWalk(repo);
try {
RevCommit revCommit = revWalk.parseCommit(commitId);
RefUpdate ru = repo.updateRef(Constants.HEAD);
ru.setNewObjectId(commitId);
ru.setRefLogMessage("commit : "
+ revCommit.getShortMessage(), false);
ru.setExpectedOldObjectId(headId);
Result rc = ru.update();
switch (rc) {
case NEW:
case FAST_FORWARD: {
setCallable(false);
if (state == RepositoryState.MERGING_RESOLVED) {
// Commit was successful. Now delete the files
// used for merge commits
repo.writeMergeCommitMsg(null);
repo.writeMergeHeads(null);
}
return revCommit;
}
case REJECTED:
case LOCK_FAILURE:
throw new ConcurrentRefUpdateException(JGitText
.get().couldNotLockHEAD, ru.getRef(), rc);
default:
throw new JGitInternalException(MessageFormat
.format(JGitText.get().updatingRefFailed,
Constants.HEAD,
commitId.toString(), rc));
}
} finally {
revWalk.release();
}
} finally {
odi.release();
}
} finally {
index.unlock();
}
} catch (UnmergedPathException e) {
// since UnmergedPathException is a subclass of IOException
// which should not be wrapped by a JGitInternalException we
// have to catch and re-throw it here
throw e;
} catch (IOException e) {
throw new JGitInternalException(
JGitText.get().exceptionCaughtDuringExecutionOfCommitCommand, e);
}
}
/**
* Sets default values for not explicitly specified options. Then validates
* that all required data has been provided.
*
* @param state
* the state of the repository we are working on
*
* @throws NoMessageException
* if the commit message has not been specified
*/
private void processOptions(RepositoryState state) throws NoMessageException {
if (committer == null)
committer = new PersonIdent(repo);
if (author == null)
author = committer;
// when doing a merge commit parse MERGE_HEAD and MERGE_MSG files
if (state == RepositoryState.MERGING_RESOLVED) {
try {
parents = repo.readMergeHeads();
} catch (IOException e) {
throw new JGitInternalException(MessageFormat.format(
JGitText.get().exceptionOccuredDuringReadingOfGIT_DIR,
Constants.MERGE_HEAD, e));
}
if (message == null) {
try {
message = repo.readMergeCommitMsg();
} catch (IOException e) {
throw new JGitInternalException(MessageFormat.format(
JGitText.get().exceptionOccuredDuringReadingOfGIT_DIR,
Constants.MERGE_MSG, e));
}
}
}
if (message == null)
// as long as we don't suppport -C option we have to have
// an explicit message
throw new NoMessageException(JGitText.get().commitMessageNotSpecified);
}
/**
* @param message
* the commit message used for the {@code commit}
* @return {@code this}
*/
public CommitCommand setMessage(String message) {
checkCallable();
this.message = message;
return this;
}
/**
* @return the commit message used for the <code>commit</code>
*/
public String getMessage() {
return message;
}
/**
* Sets the committer for this {@code commit}. If no committer is explicitly
* specified because this method is never called or called with {@code null}
* value then the committer will be deduced from config info in repository,
* with current time.
*
* @param committer
* the committer used for the {@code commit}
* @return {@code this}
*/
public CommitCommand setCommitter(PersonIdent committer) {
checkCallable();
this.committer = committer;
return this;
}
/**
* Sets the committer for this {@code commit}. If no committer is explicitly
* specified because this method is never called or called with {@code null}
* value then the committer will be deduced from config info in repository,
* with current time.
*
* @param name
* the name of the committer used for the {@code commit}
* @param email
* the email of the committer used for the {@code commit}
* @return {@code this}
*/
public CommitCommand setCommitter(String name, String email) {
checkCallable();
return setCommitter(new PersonIdent(name, email));
}
/**
* @return the committer used for the {@code commit}. If no committer was
* specified {@code null} is returned and the default
* {@link PersonIdent} of this repo is used during execution of the
* command
*/
public PersonIdent getCommitter() {
return committer;
}
/**
* Sets the author for this {@code commit}. If no author is explicitly
* specified because this method is never called or called with {@code null}
* value then the author will be set to the committer.
*
* @param author
* the author used for the {@code commit}
* @return {@code this}
*/
public CommitCommand setAuthor(PersonIdent author) {
checkCallable();
this.author = author;
return this;
}
/**
* Sets the author for this {@code commit}. If no author is explicitly
* specified because this method is never called or called with {@code null}
* value then the author will be set to the committer.
*
* @param name
* the name of the author used for the {@code commit}
* @param email
* the email of the author used for the {@code commit}
* @return {@code this}
*/
public CommitCommand setAuthor(String name, String email) {
checkCallable();
return setAuthor(new PersonIdent(name, email));
}
/**
* @return the author used for the {@code commit}. If no author was
* specified {@code null} is returned and the default
* {@link PersonIdent} of this repo is used during execution of the
* command
*/
public PersonIdent getAuthor() {
return author;
}
/**
* If set to true the Commit command automatically stages files that have
* been modified and deleted, but new files you not known by the repository
* are not affected. This corresponds to the parameter -a on the command
* line.
*
* @param all
* @return {@code this}
*/
public CommitCommand setAll(boolean all) {
this.all = all;
return this;
}
}