de.felixschulze.gradle.helper.GitHelper.java Source code

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Here is the source code for de.felixschulze.gradle.helper.GitHelper.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2013 Felix Schulze
 *
 * 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 de.felixschulze.gradle.helper;

import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryBuilder;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;

import java.io.File;
import java.io.IOException;
import java.util.Iterator;

/**
 * Helper for creating an automatic version number from git.
 *
 * @author <a href="mail@felixschulze.de">Felix Schulze</a>
 */
public class GitHelper {

    Repository repository;

    public GitHelper(File gitDir) throws IOException {
        RepositoryBuilder builder = new RepositoryBuilder();
        repository = builder.setGitDir(gitDir).readEnvironment().findGitDir().build();
    }

    public int numberOfCommits() throws GitAPIException {
        Git git = new Git(repository);
        Iterable<RevCommit> logs = git.log().call();
        Iterator<RevCommit> i = logs.iterator();
        int numberOfCommits = 0;
        while (i.hasNext()) {
            numberOfCommits++;
            i.next();
        }
        return numberOfCommits;
    }

    public String currentHeadRef() throws IOException {
        ObjectId head = repository.resolve("HEAD");
        RevWalk walk = new RevWalk(repository);
        RevCommit commit = walk.parseCommit(head);
        return commit.abbreviate(7).name();
    }
}