com.googlesource.gerrit.plugins.uploadvalidator.TestUtils.java Source code

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Here is the source code for com.googlesource.gerrit.plugins.uploadvalidator.TestUtils.java

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// 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.googlesource.gerrit.plugins.uploadvalidator;

import com.google.common.base.Charsets;
import com.google.common.base.Function;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.Lists;
import com.google.gerrit.server.config.PluginConfig;
import com.google.gerrit.server.git.validators.CommitValidationMessage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import org.apache.commons.io.FileUtils;
import org.eclipse.jgit.api.AddCommand;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.RmCommand;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.dircache.DirCacheEntry;
import org.eclipse.jgit.junit.TestRepository;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevTree;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.storage.file.FileRepositoryBuilder;

public class TestUtils {
    public static final PluginConfig EMPTY_PLUGIN_CONFIG = new PluginConfig("", new Config());

    protected static final byte[] EMPTY_CONTENT = "".getBytes(Charsets.UTF_8);

    private static final Function<CommitValidationMessage, String> MESSAGE_TRANSFORMER = new Function<CommitValidationMessage, String>() {
        @Override
        public String apply(CommitValidationMessage input) {
            String pre = (input.isError()) ? "ERROR: " : "MSG: ";
            return pre + input.getMessage();
        }
    };

    public static final LoadingCache<String, Pattern> PATTERN_CACHE = CacheBuilder.newBuilder()
            .build(new PatternCacheModule.Loader());

    public static Repository createNewRepository(File repoFolder) throws IOException {
        Repository repository = FileRepositoryBuilder.create(new File(repoFolder, ".git"));
        repository.create();
        return repository;
    }

    public static RevCommit makeCommit(RevWalk rw, Repository repo, String message, Set<File> files)
            throws IOException, GitAPIException {
        Map<File, byte[]> tmp = new HashMap<>();
        for (File f : files) {
            tmp.put(f, null);
        }
        return makeCommit(rw, repo, message, tmp);
    }

    public static RevCommit makeCommit(RevWalk rw, Repository repo, String message, Map<File, byte[]> files)
            throws IOException, GitAPIException {
        try (Git git = new Git(repo)) {
            if (files != null) {
                addFiles(git, files);
            }
            return rw.parseCommit(git.commit().setMessage(message).call());
        }
    }

    private static String generateFilePattern(File f, Git git) {
        return f.getAbsolutePath().replace(git.getRepository().getWorkTree().getAbsolutePath(), "").substring(1);
    }

    public static void removeFiles(Git git, Set<File> files) throws GitAPIException {
        RmCommand rmc = git.rm();
        for (File f : files) {
            rmc.addFilepattern(generateFilePattern(f, git));
        }
        rmc.call();
    }

    private static void addFiles(Git git, Map<File, byte[]> files) throws IOException, GitAPIException {
        AddCommand ac = git.add();
        for (File f : files.keySet()) {
            if (!f.exists()) {
                FileUtils.touch(f);
            }
            if (files.get(f) != null) {
                FileUtils.writeByteArrayToFile(f, files.get(f));
            }
            ac = ac.addFilepattern(generateFilePattern(f, git));
        }
        ac.call();
    }

    public static File createEmptyFile(String name, Repository repo) {
        return new File(repo.getDirectory().getParent(), name);
    }

    public static String transformMessage(CommitValidationMessage messages) {
        return MESSAGE_TRANSFORMER.apply(messages);
    }

    public static List<String> transformMessages(List<CommitValidationMessage> messages) {
        return Lists.transform(messages, MESSAGE_TRANSFORMER);
    }

    public static DirCacheEntry[] createEmptyDirCacheEntries(List<String> filenames,
            TestRepository<Repository> repo) throws Exception {
        DirCacheEntry[] entries = new DirCacheEntry[filenames.size()];
        for (int x = 0; x < filenames.size(); x++) {
            entries[x] = createDirCacheEntry(filenames.get(x), EMPTY_CONTENT, repo);
        }
        return entries;
    }

    public static DirCacheEntry createDirCacheEntry(String pathname, byte[] content,
            TestRepository<Repository> repo) throws Exception {
        return repo.file(pathname, repo.blob(content));
    }

    public static RevCommit makeCommit(RevWalk rw, DirCacheEntry[] entries, TestRepository<Repository> repo)
            throws Exception {
        return makeCommit(rw, entries, repo, (RevCommit[]) null);
    }

    public static RevCommit makeCommit(RevWalk rw, DirCacheEntry[] entries, TestRepository<Repository> repo,
            RevCommit... parents) throws Exception {
        final RevTree ta = repo.tree(entries);
        RevCommit c = (parents == null) ? repo.commit(ta) : repo.commit(ta, parents);
        repo.parseBody(c);
        return rw.parseCommit(c);
    }
}