/*
* Copyright (C) 2010, 2014 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.
*/
package org.eclipse.orion.server.git.jobs;
import static org.eclipse.jgit.lib.RefDatabase.ALL;
import java.io.IOException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.GitCommand;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.api.errors.NoHeadException;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.internal.JGitText;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.revwalk.filter.AndRevFilter;
import org.eclipse.jgit.revwalk.filter.AuthorRevFilter;
import org.eclipse.jgit.revwalk.filter.CommitTimeRevFilter;
import org.eclipse.jgit.revwalk.filter.CommitterRevFilter;
import org.eclipse.jgit.revwalk.filter.MaxCountRevFilter;
import org.eclipse.jgit.revwalk.filter.MessageRevFilter;
import org.eclipse.jgit.revwalk.filter.RevFilter;
import org.eclipse.jgit.revwalk.filter.SkipRevFilter;
import org.eclipse.jgit.treewalk.filter.AndTreeFilter;
import org.eclipse.jgit.treewalk.filter.PathFilter;
import org.eclipse.jgit.treewalk.filter.PathFilterGroup;
import org.eclipse.jgit.treewalk.filter.TreeFilter;
/**
* A class used to execute a {@code Log} command. It has setters for all supported options and arguments of this command and a {@link #call()} method to finally
* execute the command. Each instance of this class should only be used for one invocation of the command (means: one call to {@link #call()})
* <p>
* Examples (<code>git</code> is a {@link Git} instance):
* <p>
* Get newest 10 commits, starting from the current branch:
*
* <pre>
* ObjectId head = repository.resolve(Constants.HEAD);
*
* Iterable<RevCommit> commits = git.log().add(head).setMaxCount(10).call();
* </pre>
* <p>
*
* <p>
* Get commits only for a specific file:
*
* <pre>
* git.log().add(head).addPath("dir/filename.txt").call();
* </pre>
* <p>
*
* @see <a href="http://www.kernel.org/pub/software/scm/git/docs/git-log.html" >Git documentation about Log</a>
*/
public class LogCommand extends GitCommand<Iterable<RevCommit>> {
private RevWalk walk;
private boolean startSpecified = false;
private final List<PathFilter> pathFilters = new ArrayList<PathFilter>();
private int maxCount = -1;
private int skip = -1;
private RevFilter msgFilter;
private RevFilter authorFilter;
private RevFilter committerFilter;
private RevFilter sha1Filter;
private RevFilter dateFilter;
/**
* @param repo
*/
protected LogCommand(Repository repo) {
super(repo);
walk = new RevWalk(repo);
}
/**
* Executes the {@code Log} command with all the options and parameters collected by the setter methods (e.g. {@link #add(AnyObjectId)},
* {@link #not(AnyObjectId)}, ..) of this class. Each instance of this class should only be used for one invocation of the command. Don't call this method
* twice on an instance.
*
* @return an iteration over RevCommits
* @throws NoHeadException
* of the references ref cannot be resolved
*/
@Override
public Iterable<RevCommit> call() throws GitAPIException, NoHeadException {
checkCallable();
ArrayList<RevFilter> filters = new ArrayList<RevFilter>();
if (pathFilters.size() > 0)
walk.setTreeFilter(AndTreeFilter.create(PathFilterGroup.create(pathFilters), TreeFilter.ANY_DIFF));
if (msgFilter != null)
filters.add(msgFilter);
if (authorFilter != null)
filters.add(authorFilter);
if (committerFilter != null)
filters.add(committerFilter);
if (sha1Filter != null)
filters.add(sha1Filter);
if (dateFilter != null)
filters.add(dateFilter);
if (skip > -1)
filters.add(SkipRevFilter.create(skip));
if (maxCount > -1)
filters.add(MaxCountRevFilter.create(maxCount));
RevFilter filter = null;
if (filters.size() > 1) {
filter = AndRevFilter.create(filters);
} else if (filters.size() == 1) {
filter = filters.get(0);
}
if (filter != null)
walk.setRevFilter(filter);
if (!startSpecified) {
try {
ObjectId headId = repo.resolve(Constants.HEAD);
if (headId == null)
throw new NoHeadException(JGitText.get().noHEADExistsAndNoExplicitStartingRevisionWasSpecified);
add(headId);
} catch (IOException e) {
// all exceptions thrown by add() shouldn't occur and represent
// severe low-level exception which are therefore wrapped
throw new JGitInternalException(JGitText.get().anExceptionOccurredWhileTryingToAddTheIdOfHEAD, e);
}
}
setCallable(false);
return walk;
}
/**
* Mark a commit to start graph traversal from.
*
* @see RevWalk#markStart(RevCommit)
* @param start
* @return {@code this}
* @throws MissingObjectException
* the commit supplied is not available from the object database. This usually indicates the supplied commit is invalid, but the reference was
* constructed during an earlier invocation to {@link RevWalk#lookupCommit(AnyObjectId)}.
* @throws IncorrectObjectTypeException
* the object was not parsed yet and it was discovered during parsing that it is not actually a commit. This usually indicates the caller
* supplied a non-commit SHA-1 to {@link RevWalk#lookupCommit(AnyObjectId)}.
* @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 MissingObjectException}) are typically not wrapped here
* but thrown as original exception
*/
public LogCommand add(AnyObjectId start) throws MissingObjectException, IncorrectObjectTypeException {
return add(true, start);
}
/**
* Same as {@code --not start}, or {@code ^start}
*
* @param start
* @return {@code this}
* @throws MissingObjectException
* the commit supplied is not available from the object database. This usually indicates the supplied commit is invalid, but the reference was
* constructed during an earlier invocation to {@link RevWalk#lookupCommit(AnyObjectId)}.
* @throws IncorrectObjectTypeException
* the object was not parsed yet and it was discovered during parsing that it is not actually a commit. This usually indicates the caller
* supplied a non-commit SHA-1 to {@link RevWalk#lookupCommit(AnyObjectId)}.
* @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 MissingObjectException}) are typically not wrapped here
* but thrown as original exception
*/
public LogCommand not(AnyObjectId start) throws MissingObjectException, IncorrectObjectTypeException {
return add(false, start);
}
/**
* Adds the range {@code since..until}
*
* @param since
* @param until
* @return {@code this}
* @throws MissingObjectException
* the commit supplied is not available from the object database. This usually indicates the supplied commit is invalid, but the reference was
* constructed during an earlier invocation to {@link RevWalk#lookupCommit(AnyObjectId)}.
* @throws IncorrectObjectTypeException
* the object was not parsed yet and it was discovered during parsing that it is not actually a commit. This usually indicates the caller
* supplied a non-commit SHA-1 to {@link RevWalk#lookupCommit(AnyObjectId)}.
* @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 MissingObjectException}) are typically not wrapped here
* but thrown as original exception
*/
public LogCommand addRange(AnyObjectId since, AnyObjectId until) throws MissingObjectException, IncorrectObjectTypeException {
return not(since).add(until);
}
/**
* Add all refs as commits to start the graph traversal from.
*
* @see #add(AnyObjectId)
* @return {@code this}
* @throws IOException
* the references could not be accessed
*/
public LogCommand all() throws IOException {
Map<String, Ref> refs = getRepository().getRefDatabase().getRefs(ALL);
for (Ref ref : refs.values()) {
if (!ref.isPeeled())
ref = getRepository().peel(ref);
ObjectId objectId = ref.getPeeledObjectId();
if (objectId == null)
objectId = ref.getObjectId();
RevCommit commit = null;
try {
commit = walk.parseCommit(objectId);
} catch (MissingObjectException e) {
// ignore: the ref points to an object that does not exist;
// it should be ignored as traversal starting point.
} catch (IncorrectObjectTypeException e) {
// ignore: the ref points to an object that is not a commit
// (e.g. a tree or a blob);
// it should be ignored as traversal starting point.
}
if (commit != null)
add(commit);
}
return this;
}
/**
* Show only commits that affect any of the specified paths. The path must either name a file or a directory exactly and use <code>/</code> (slash) as
* separator. Note that regex expressions or wildcards are not supported.
*
* @param path
* a repository-relative path (with <code>/</code> as separator)
* @return {@code this}
*/
public LogCommand addPath(String path) {
checkCallable();
pathFilters.add(PathFilter.create(path));
return this;
}
public LogCommand setMessageFilter(String filter) {
checkCallable();
msgFilter = MessageRevFilter.create(filter);
return this;
}
public LogCommand setAuthFilter(String filter) {
checkCallable();
authorFilter = AuthorRevFilter.create(filter);
return this;
}
public LogCommand setCommitterFilter(String filter) {
checkCallable();
committerFilter = CommitterRevFilter.create(filter);
return this;
}
public LogCommand setSHA1Filter(String filter) {
checkCallable();
sha1Filter = SHA1RevFilter.create(filter);
return this;
}
public LogCommand setDateFilter(String fromDate, String toDate) {
checkCallable();
try {
if (fromDate != null) {
long fromD = Long.parseLong(fromDate);
if (toDate != null) {
long toD = Long.parseLong(toDate);
dateFilter = CommitTimeRevFilter.between(fromD, toD);
} else {
dateFilter = CommitTimeRevFilter.after(fromD);
}
} else if (toDate != null) {
Long toD = Long.parseLong(toDate);
if (toD != null)
dateFilter = CommitTimeRevFilter.before(toD);
}
} catch (NumberFormatException ex) {
}
return this;
}
/**
* Skip the number of commits before starting to show the commit output.
*
* @param skip
* the number of commits to skip
* @return {@code this}
*/
public LogCommand setSkip(int skip) {
checkCallable();
this.skip = skip;
return this;
}
/**
* Limit the number of commits to output.
*
* @param maxCount
* the limit
* @return {@code this}
*/
public LogCommand setMaxCount(int maxCount) {
checkCallable();
this.maxCount = maxCount;
return this;
}
private LogCommand add(boolean include, AnyObjectId start) throws MissingObjectException, IncorrectObjectTypeException, JGitInternalException {
checkCallable();
try {
if (include) {
walk.markStart(walk.lookupCommit(start));
startSpecified = true;
} else
walk.markUninteresting(walk.lookupCommit(start));
return this;
} catch (MissingObjectException e) {
throw e;
} catch (IncorrectObjectTypeException e) {
throw e;
} catch (IOException e) {
throw new JGitInternalException(MessageFormat.format(JGitText.get().exceptionOccurredDuringAddingOfOptionToALogCommand, start), e);
}
}
}