Ejemplo de uso de JGit para obtener un csv de cambios de release

 package XXXX;  
 import java.io.File;  
 import java.io.IOException;  
 import java.text.ParseException;  
 import java.text.SimpleDateFormat;  
 import java.util.Date;  
 import java.util.Iterator;  
 import org.apache.commons.io.FileUtils;  
 import org.apache.commons.lang3.StringUtils;  
 import org.eclipse.jgit.api.Git;  
 import org.eclipse.jgit.api.errors.GitAPIException;  
 import org.eclipse.jgit.lib.ObjectId;  
 import org.eclipse.jgit.lib.Ref;  
 import org.eclipse.jgit.lib.Repository;  
 import org.eclipse.jgit.revwalk.RevCommit;  
 import org.eclipse.jgit.storage.file.FileRepositoryBuilder;  
 public class ReleaseNotesGenerator {  
   private static ObjectId findActualRefObjectId(Ref ref, Repository repo) {  
     final Ref repoPeeled = repo.peel(ref);  
     if (repoPeeled.getPeeledObjectId() != null) {  
       return repoPeeled.getPeeledObjectId();  
     }  
     return ref.getObjectId();  
   }  
   private static void gitLogFromTagToNow(Repository repository, String tag1, String version, String pathFile)  
       throws IOException, GitAPIException, ParseException {  
     Git git = new Git(repository);  
     Ref refFrom = repository.findRef(tag1);  
     RevCommit latestCommit = git.log().call().iterator().next();  
     Iterable<RevCommit> log = git.log().addRange(findActualRefObjectId(refFrom, repository), latestCommit).call();  
     StringBuilder csvLines = new StringBuilder();  
     csvLines.append(StringUtils.join(new String[] { CABECERAS DE LOS CAMPOS QUE SE QUIERAN AÑADIR }, ";")  
         + "\n");  
     SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd-MM-yyyy hh:mm:ss");  
     for (Iterator<RevCommit> iterator = log.iterator(); iterator.hasNext();) {  
       RevCommit rev = iterator.next();  
       String[] splittedMessage = rev.getFullMessage().split("\\r?\\n");  
       if (splittedMessage.length == 6) {  
         cleanMessages(splittedMessage);  
         csvLines.append(StringUtils.join(  
             new String[] { splittedMessage[1], splittedMessage[2], .... CAMPOS OBTENIDOS DE CADA MENSAJE},  
             ";") + "\n");  
       }  
     }  
     FileUtils  
         .writeByteArrayToFile(  
             new File(pathFile + "_" + version + "_"  
                 + new SimpleDateFormat("ddMMyyyy_hhmm").format(new Date()) + ".csv"),  
             csvLines.toString().getBytes());  
     git.close();  
   }  
   private static void cleanMessages(String[] splittedMessage) {  
     for (int i = 0; i < splittedMessage.length; i++) {  
       splittedMessage[i] = splittedMessage[i].replaceAll("\\[.*\\]", "");  
     }  
   }  
   public static void main(String[] args) throws IOException, GitAPIException, ParseException {  
     String version = "versionFromMaven";  
     String fromRevision = "V5.5.0";  
     if (args != null && args.length > 0) {  
       fromRevision = args[0];  
       if (args != null && args.length > 1) {  
         version = args[1];  
       }  
     }  
     System.out.println("fromRevision:" + fromRevision + " version:" + version);  
     FileRepositoryBuilder repositoryBuilder = new FileRepositoryBuilder();  
     repositoryBuilder.setMustExist(true);  
     File gitBase = new File(".git");  
     String pathFile = "resources/releaseNotes/releaseNotes";  
     if (!gitBase.exists()) {  
       gitBase = new File("../.git");  
       pathFile = "../resources/releaseNotes/releaseNotes";  
     }  
     System.out.println("gitBasePath:" + gitBase.getAbsolutePath());  
     repositoryBuilder.setGitDir(gitBase);  
     Repository repository = repositoryBuilder.build();  
     if (repository.getObjectDatabase().exists()) {  
       gitLogFromTagToNow(repository, fromRevision, version, pathFile);  
     }  
   }  
 }