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// Copyright (C) 2013 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.acceptance.git;
import com.google.common.collect.Iterables;
import com.google.gerrit.acceptance.SshSession;
import com.google.gerrit.acceptance.TempFileUtil;
import com.google.gerrit.acceptance.TestAccount;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import org.eclipse.jgit.api.AddCommand;
import org.eclipse.jgit.api.CloneCommand;
import org.eclipse.jgit.api.CommitCommand;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.PushCommand;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.transport.JschConfigSessionFactory;
import org.eclipse.jgit.transport.OpenSshConfig.Host;
import org.eclipse.jgit.transport.PushResult;
import org.eclipse.jgit.transport.RefSpec;
import org.eclipse.jgit.transport.SshSessionFactory;
import org.eclipse.jgit.util.ChangeIdUtil;
import org.eclipse.jgit.util.FS;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Properties;
public class GitUtil {
public static void initSsh(final TestAccount a) {
final Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
JSch.setConfig(config);
// register a JschConfigSessionFactory that adds the private key as identity
// to the JSch instance of JGit so that SSH communication via JGit can
// succeed
SshSessionFactory.setInstance(new JschConfigSessionFactory() {
@Override
protected void configure(Host hc, Session session) {
try {
final JSch jsch = getJSch(hc, FS.DETECTED);
jsch.addIdentity("KeyPair", a.privateKey(),
a.sshKey.getPublicKeyBlob(), null);
} catch (JSchException e) {
throw new RuntimeException(e);
}
}
});
}
public static void createProject(SshSession s, String name)
throws JSchException, IOException {
s.exec("gerrit create-project --empty-commit --name \"" + name + "\"");
}
public static Git cloneProject(String url) throws GitAPIException {
final File gitDir = TempFileUtil.createTempDirectory();
final CloneCommand cloneCmd = Git.cloneRepository();
cloneCmd.setURI(url);
cloneCmd.setDirectory(gitDir);
return cloneCmd.call();
}
public static void add(Git git, String path, String content)
throws GitAPIException, IOException {
File f = new File(git.getRepository().getDirectory().getParentFile(), path);
File p = f.getParentFile();
if (!p.exists() && !p.mkdirs()) {
throw new IOException("failed to create dir: " + p.getAbsolutePath());
}
FileWriter w = new FileWriter(f);
BufferedWriter out = new BufferedWriter(w);
try {
out.write(content);
} finally {
out.close();
}
final AddCommand addCmd = git.add();
addCmd.addFilepattern(path);
addCmd.call();
}
public static String createCommit(Git git, PersonIdent i, String msg)
throws GitAPIException, IOException {
return createCommit(git, i, msg, true, false);
}
public static void amendCommit(Git git, PersonIdent i, String msg, String changeId)
throws GitAPIException, IOException {
msg = ChangeIdUtil.insertId(msg, ObjectId.fromString(changeId.substring(1)));
createCommit(git, i, msg, false, true);
}
private static String createCommit(Git git, PersonIdent i, String msg,
boolean insertChangeId, boolean amend) throws GitAPIException, IOException {
ObjectId changeId = null;
if (insertChangeId) {
changeId = computeChangeId(git, i, msg);
msg = ChangeIdUtil.insertId(msg, changeId);
}
final CommitCommand commitCmd = git.commit();
commitCmd.setAmend(amend);
commitCmd.setAuthor(i);
commitCmd.setCommitter(i);
commitCmd.setMessage(msg);
commitCmd.call();
return changeId != null ? "I" + changeId.getName() : null;
}
private static ObjectId computeChangeId(Git git, PersonIdent i, String msg)
throws IOException {
RevWalk rw = new RevWalk(git.getRepository());
try {
RevCommit parent =
rw.lookupCommit(git.getRepository().getRef(Constants.HEAD).getObjectId());
return ChangeIdUtil.computeChangeId(parent.getTree(), parent.getId(), i, i, msg);
} finally {
rw.release();
}
}
public static PushResult pushHead(Git git, String ref) throws GitAPIException {
PushCommand pushCmd = git.push();
pushCmd.setRefSpecs(new RefSpec("HEAD:" + ref));
Iterable<PushResult> r = pushCmd.call();
return Iterables.getOnlyElement(r);
}
}
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