com.google.gerrit.server.project.RefUtil Maven / Gradle / Ivy
// Copyright (C) 2016 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.server.project;
import static org.eclipse.jgit.lib.Constants.R_REFS;
import static org.eclipse.jgit.lib.Constants.R_TAGS;
import com.google.common.collect.Iterables;
import com.google.gerrit.entities.RefNames;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
import java.io.IOException;
import java.util.Collections;
import org.eclipse.jgit.errors.AmbiguousObjectException;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.errors.RevisionSyntaxException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefDatabase;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.ObjectWalk;
import org.eclipse.jgit.revwalk.RevWalk;
public class RefUtil {
private RefUtil() {}
public static ObjectId parseBaseRevision(Repository repo, String baseRevision)
throws UnprocessableEntityException, IOException {
try {
ObjectId revid = repo.resolve(baseRevision);
if (revid == null) {
throw new UnprocessableEntityException(
String.format("base revision \"%s\" not found", baseRevision));
}
return revid;
} catch (RevisionSyntaxException e) {
throw new UnprocessableEntityException(
String.format("base revision \"%s\" is invalid", baseRevision), e);
} catch (AmbiguousObjectException e) {
throw new UnprocessableEntityException(
String.format("base revision \"%s\" is ambiguous", baseRevision), e);
}
}
public static RevWalk verifyConnected(Repository repo, ObjectId baseRevision)
throws BadRequestException, UnprocessableEntityException, IOException {
try {
ObjectWalk rw = new ObjectWalk(repo);
rw.markStart(rw.parseCommit(baseRevision));
RefDatabase refDb = repo.getRefDatabase();
Iterable refs =
Iterables.concat(
refDb.getRefsByPrefix(Constants.R_HEADS), refDb.getRefsByPrefix(Constants.R_TAGS));
Ref rc = refDb.exactRef(RefNames.REFS_CONFIG);
if (rc != null) {
refs = Iterables.concat(refs, Collections.singleton(rc));
}
for (Ref r : refs) {
try {
rw.markUninteresting(rw.parseAny(r.getObjectId()));
} catch (MissingObjectException err) {
continue;
}
}
rw.checkConnectivity();
return rw;
} catch (IncorrectObjectTypeException e) {
throw new BadRequestException(
String.format("base revision \"%s\" is not a commit", baseRevision.name()), e);
} catch (MissingObjectException e) {
throw new UnprocessableEntityException(
String.format("base revision \"%s\" not found", baseRevision.name()), e);
}
}
public static String getRefPrefix(String refName) {
int i = refName.lastIndexOf('/');
if (i > Constants.R_HEADS.length() - 1) {
return refName.substring(0, i);
}
return Constants.R_HEADS;
}
/** Fully qualifies a tag name to refs/tags/TAG-NAME */
public static String normalizeTagRef(String tag) throws BadRequestException {
String result = tag;
while (result.startsWith("/")) {
result = result.substring(1);
}
if (result.startsWith(R_REFS) && !result.startsWith(R_TAGS)) {
throw new BadRequestException("invalid tag name \"" + result + "\"");
}
if (!result.startsWith(R_TAGS)) {
result = R_TAGS + result;
}
if (!Repository.isValidRefName(result)) {
throw new BadRequestException("invalid tag name \"" + result + "\"");
}
return result;
}
}