com.googlesource.gerrit.plugins.zuul.GetCrd.java Source code

Introduction

Here is the source code for com.googlesource.gerrit.plugins.zuul.GetCrd.java

Source

// Copyright (C) 2015 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.googlesource.gerrit.plugins.zuul;

import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.extensions.restapi.TopLevelResource;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.change.RevisionResource;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.restapi.change.ChangesCollection;
import com.google.gerrit.server.restapi.change.QueryChanges;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;

@Singleton
public class GetCrd implements RestReadView<RevisionResource> {
    private final ChangesCollection changes;
    private final GitRepositoryManager repoManager;

    @Inject
    GetCrd(ChangesCollection changes, GitRepositoryManager repoManager) {
        this.changes = changes;
        this.repoManager = repoManager;
    }

    @Override
    @SuppressWarnings("unchecked")
    public CrdInfo apply(RevisionResource rsrc) throws RepositoryNotFoundException, IOException,
            BadRequestException, AuthException, OrmException, PermissionBackendException {

        CrdInfo out = new CrdInfo();
        out.dependsOn = new ArrayList<>();
        out.neededBy = new ArrayList<>();

        // get depends on info
        Project.NameKey p = rsrc.getChange().getProject();
        try (Repository repo = repoManager.openRepository(p); RevWalk rw = new RevWalk(repo)) {
            String rev = rsrc.getPatchSet().getRevision().get();
            RevCommit commit = rw.parseCommit(ObjectId.fromString(rev));
            String commitMsg = commit.getFullMessage();
            Pattern pattern = Pattern.compile("[Dd]epends-[Oo]n:? (I[0-9a-f]{8,40})", Pattern.DOTALL);
            Matcher matcher = pattern.matcher(commitMsg);
            while (matcher.find()) {
                out.dependsOn.add(matcher.group(1));
            }
        }

        // get needed by info
        Change.Key chgKey = rsrc.getChange().getKey();
        QueryChanges query = changes.list();
        String neededByQuery = "message:" + chgKey + " -change:" + chgKey;
        query.addQuery(neededByQuery);
        List<ChangeInfo> changes = (List<ChangeInfo>) query.apply(TopLevelResource.INSTANCE);
        // check for dependency cycles
        for (ChangeInfo change : changes) {
            if (out.dependsOn.contains(change.changeId)) {
                out.cycle = true;
            }
            out.neededBy.add(change.changeId);
        }

        return out;
    }
}