GitRepository.java

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2013-2026 The Coveralls Maven Plugin Project Contributors:
 *     https://github.com/hazendaz/coveralls-maven-plugin/graphs/contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.eluder.coveralls.maven.plugin.domain;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryBuilder;
import org.eclipse.jgit.revwalk.RevWalk;

/**
 * The Class GitRepository.
 */
public class GitRepository {

    /** The source directory. */
    private final File sourceDirectory;

    /**
     * Instantiates a new git repository.
     *
     * @param sourceDirectory
     *            the source directory
     */
    public GitRepository(final File sourceDirectory) {
        this.sourceDirectory = sourceDirectory;
    }

    /**
     * Load.
     *
     * @return the git
     *
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    public Git load() throws IOException {
        try (var repository = new RepositoryBuilder().findGitDir(this.sourceDirectory).build()) {
            final var head = this.getHead(repository);
            final var branch = this.getBranch(repository);
            final var remotes = this.getRemotes(repository);
            return new Git(repository.getWorkTree(), head, branch, remotes);
        }
    }

    /**
     * Gets the head.
     * <p>
     * Resource is closed in load().
     *
     * @param repository
     *            the repository
     *
     * @return the head
     *
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    @SuppressWarnings("resource")
    private Git.Head getHead(final Repository repository) throws IOException {
        final var revision = repository.resolve(Constants.HEAD);
        final var commit = new RevWalk(repository).parseCommit(revision);
        if (revision == null) {
            throw new IllegalStateException("Cannot resolve HEAD");
        }
        return new Git.Head(revision.getName(), commit.getAuthorIdent().getName(),
                commit.getAuthorIdent().getEmailAddress(), commit.getCommitterIdent().getName(),
                commit.getCommitterIdent().getEmailAddress(), commit.getFullMessage());
    }

    /**
     * Gets the branch.
     *
     * @param repository
     *            the repository
     *
     * @return the branch
     *
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    private String getBranch(final Repository repository) throws IOException {
        return repository.getBranch();
    }

    /**
     * Gets the remotes.
     *
     * @param repository
     *            the repository
     *
     * @return the remotes
     */
    private List<Git.Remote> getRemotes(final Repository repository) {
        final Config config = repository.getConfig();
        final List<Git.Remote> remotes = new ArrayList<>();
        for (final String remote : config.getSubsections("remote")) {
            final var url = config.getString("remote", remote, "url");
            remotes.add(new Git.Remote(remote, url));
        }
        return remotes;
    }
}