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// Copyright (C) 2011 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.sshd.commands;
import com.google.gerrit.reviewdb.Branch;
import com.google.gerrit.reviewdb.Change;
import com.google.gerrit.reviewdb.PatchSet;
import com.google.gerrit.reviewdb.PatchSetAccess;
import com.google.gerrit.reviewdb.Project;
import com.google.gerrit.reviewdb.RevId;
import com.google.gerrit.reviewdb.ReviewDb;
import com.google.gwtorm.client.OrmException;
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.FooterKey;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* Constants and utility methods for staging commands.
*
*/
public class StagingCommand {
public static class BranchNotFoundException extends Exception {
private static final long serialVersionUID = 1L;
public BranchNotFoundException(final String message) {
super(message);
}
}
public static class UpdateRefException extends Exception {
private static final long serialVersionUID = 1L;
public UpdateRefException(final String message) {
super(message);
}
}
/** Prefix for head refs. */
public static final String R_HEADS = "refs/heads/";
/** Prefix for build refs. */
public static final String R_BUILDS = "refs/builds/";
/** Prefix for staging refs. */
public static final String R_STAGING = "refs/staging/";
/** Private constructor. This class should not be instantiated. */
private StagingCommand() {
}
/**
* Creates a branch key including ref prefix.
* @param project Project for the branch key.
* @param prefix Expected prefix.
* @param branch Branch name with or without prefix.
* @return Branch name key with prefix.
*/
public static Branch.NameKey getNameKey(final String project,
final String prefix, final String branch) {
final Project.NameKey projectKey = getProjectKey(project);
if (branch.startsWith(prefix)) {
return new Branch.NameKey(projectKey, branch);
} else {
return new Branch.NameKey(projectKey, prefix + branch);
}
}
/**
* Creates a branch key without any prefix.
* @param project Project for the branch key.
* @param prefix Prefix to remove.
* @param branch Branch name with or without prefix.
* @return Branch name key without prefix.
*/
public static Branch.NameKey getShortNameKey(final String project,
final String prefix, final String branch) {
final Project.NameKey projectKey = getProjectKey(project);
if (branch.startsWith(prefix)) {
return new Branch.NameKey(projectKey, branch.substring(prefix.length()));
} else {
return new Branch.NameKey(projectKey, branch);
}
}
public static Branch.NameKey getDestinationKey(final Branch.NameKey key) {
final String branch = key.get();
if (branch.startsWith(R_STAGING)) {
return new Branch.NameKey(key.getParentKey(),
R_HEADS + branch.substring(R_STAGING.length()));
} else if (branch.startsWith(R_BUILDS)) {
return new Branch.NameKey(key.getParentKey(),
R_HEADS + branch.substring(R_BUILDS.length()));
} else {
return key;
}
}
public static Project.NameKey getProjectKey(final String project) {
String projectName = project;
if (project.endsWith(Constants.DOT_GIT_EXT)) {
projectName = project.substring(0, //
project.length() - Constants.DOT_GIT_EXT.length());
}
return new Project.NameKey(projectName);
}
/**
* Lists open changes in a branch.
* @param git jGit Repository. Must be open.
* @param db ReviewDb of a Gerrit site.
* @param branch Branch to search for open changes.
* @param destination Destination branch for changes.
* @return List of open changes.
* @throws IOException Thrown by Repository or RevWalk if repository is not
* accessible.
* @throws OrmException Thrown if ReviewDb is not accessible.
*/
public static List<PatchSet> openChanges(Repository git, ReviewDb db,
final Branch.NameKey branch, final Branch.NameKey destination)
throws IOException, OrmException, BranchNotFoundException {
List<PatchSet> open = new ArrayList<PatchSet>();
PatchSetAccess patchSetAccess = db.patchSets();
RevWalk revWalk = new RevWalk(git);
try {
Ref ref = git.getRef(branch.get());
if (ref == null) {
throw new BranchNotFoundException("No such branch: " + branch);
}
RevCommit firstCommit = revWalk.parseCommit(ref.getObjectId());
revWalk.markStart(firstCommit);
Iterator<RevCommit> i = revWalk.iterator();
final String changeIdFooter = "Change-Id";
FooterKey changeIdKey = new FooterKey(changeIdFooter);
while (i.hasNext()) {
RevCommit commit = i.next();
RevId revId = new RevId(ObjectId.toString(commit));
List<String> changeIds = commit.getFooterLines(changeIdKey);
if (changeIds.isEmpty()) {
// No Change-Id footer available. Search by patch set revision.
List<PatchSet> patchSets = patchSetAccess.byRevision(revId).toList();
for (PatchSet patchSet : patchSets) {
Change.Id changeId = patchSet.getId().getParentKey();
final Change change = db.changes().get(changeId);
if (change.getStatus().isOpen()) {
open.add(patchSet);
break;
}
}
} else {
final Branch.NameKey destinationKey =
getNameKey(destination.getParentKey().get(), R_HEADS,
destination.get());
// Change-Id footer found in commit message. Search by Change-Id
// value. Usually, there is only 1 Change-Id footer.
for (String changeId : changeIds) {
List<Change> changes =
db.changes().byKey(Change.Key.parse(changeId)).toList();
for (Change change : changes) {
if (!change.getDest().equals(destinationKey)) {
continue;
}
if (change.getStatus().isOpen()) {
open.add(patchSetAccess.get(change.currentPatchSetId()));
}
}
}
}
}
} finally {
revWalk.dispose();
}
return open;
}
}
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