BlameFile.java

package org.dstadler.jgit.porcelain;

import org.dstadler.jgit.helper.CookbookHelper;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.blame.BlameResult;
import org.eclipse.jgit.diff.RawText;
import org.eclipse.jgit.diff.RawTextComparator;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;

// Simple example that shows how to get the Blame-information for a file
public class BlameFile {
    public static void main(String[] args) throws IOException, GitAPIException {
		try (Repository repo = CookbookHelper.openJGitCookbookRepository()) {
			final String[] list = new File(".").list();
			if (list == null) {
				throw new IllegalStateException("Did not find any files at " + new File(".").getAbsolutePath());
			}

			final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm");
			for (String file : list) {
				if (new File(file).isDirectory()) {
					continue;
				}

				System.out.println("Blaming " + file);
				final BlameResult result = new Git(repo).blame().setFilePath(file)
						.setTextComparator(RawTextComparator.WS_IGNORE_ALL).call();
				final RawText rawText = result.getResultContents();
				for (int i = 0; i < rawText.size(); i++) {
					final PersonIdent sourceAuthor = result.getSourceAuthor(i);
					final RevCommit sourceCommit = result.getSourceCommit(i);
					System.out.println(sourceAuthor.getName() +
							(sourceCommit != null ? " - " + DATE_FORMAT.format(((long)sourceCommit.getCommitTime())*1000) +
									" - " + sourceCommit.getName() : "") +
							": " + rawText.getString(i));
				}
			}
		}
    }
}