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// Copyright (C) 2022 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.submitrequirement.predicate;
import static com.google.gerrit.server.query.change.SubmitRequirementChangeQueryBuilder.SUBMODULE_UPDATE_HAS_ARG;
import com.google.gerrit.entities.Patch.FileMode;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.patch.DiffNotAvailableException;
import com.google.gerrit.server.patch.DiffOperations;
import com.google.gerrit.server.patch.DiffOptions;
import com.google.gerrit.server.patch.filediff.FileDiffOutput;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.query.change.SubmitRequirementPredicate;
import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;
import java.io.IOException;
import java.util.Map;
import java.util.Optional;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
/**
* Submit requirement predicate that returns true if the diff of the latest patchset against the
* parent number identified by {@link #base} has a submodule modified file, that is, a .gitmodules
* or a git link file.
*/
public class HasSubmoduleUpdatePredicate extends SubmitRequirementPredicate {
private static final String GIT_MODULES_FILE = ".gitmodules";
private final DiffOperations diffOperations;
private final GitRepositoryManager repoManager;
private final int base;
public interface Factory {
HasSubmoduleUpdatePredicate create(int base);
}
@Inject
HasSubmoduleUpdatePredicate(
DiffOperations diffOperations, GitRepositoryManager repoManager, @Assisted int base) {
super("has", SUBMODULE_UPDATE_HAS_ARG);
this.diffOperations = diffOperations;
this.repoManager = repoManager;
this.base = base;
}
@Override
public boolean match(ChangeData cd) {
try {
try (Repository repo = repoManager.openRepository(cd.project());
RevWalk rw = new RevWalk(repo)) {
RevCommit revCommit = rw.parseCommit(cd.currentPatchSet().commitId());
if (base > revCommit.getParentCount()) {
return false;
}
}
Map<String, FileDiffOutput> diffList =
diffOperations.listModifiedFilesAgainstParent(
cd.project(), cd.currentPatchSet().commitId(), base, DiffOptions.DEFAULTS);
return diffList.values().stream().anyMatch(HasSubmoduleUpdatePredicate::isGitLink);
} catch (DiffNotAvailableException e) {
throw new StorageException(
String.format(
"Failed to evaluate the diff for commit %s against parent number %d",
cd.currentPatchSet().commitId(), base),
e);
} catch (IOException e) {
throw new StorageException(
String.format("Failed to open repo for project %s", cd.project()), e);
}
}
/**
* Return true if the modified file is a {@link #GIT_MODULES_FILE} or a git link regardless of if
* the modification type is add, remove or modify.
*/
private static boolean isGitLink(FileDiffOutput fileDiffOutput) {
Optional<String> oldPath = fileDiffOutput.oldPath();
Optional<String> newPath = fileDiffOutput.newPath();
Optional<FileMode> oldMode = fileDiffOutput.oldMode();
Optional<FileMode> newMode = fileDiffOutput.newMode();
return (oldPath.isPresent() && oldPath.get().equals(GIT_MODULES_FILE))
|| (newPath.isPresent() && newPath.get().equals(GIT_MODULES_FILE))
|| (oldMode.isPresent() && oldMode.get().equals(FileMode.GITLINK))
|| (newMode.isPresent() && newMode.get().equals(FileMode.GITLINK));
}
@Override
public int getCost() {
return 1;
}
}