List commits associated with a given tag with JGit

Question

I need to create a history file that details all tags and for each tag, all its commits.

I\'ve tried to call getTags() on the repository object and use

Answer 1

List all Tags:

List call = new Git(repository).tagList().call();
for (Ref ref : call) {
    System.out.println("Tag: " + ref + " " + ref.getName() + " " + ref.getObjectId().getName());
}

List commits based on tag:

I'd use the log-command based on the tag-name with the peeled-magic as noted by Rüdiger:

        LogCommand log = new Git(repository).log();

        Ref peeledRef = repository.peel(ref);
        if(peeledRef.getPeeledObjectId() != null) {
            log.add(peeledRef.getPeeledObjectId());
        } else {
            log.add(ref.getObjectId());
        }

        Iterable logs = log.call();
        for (RevCommit rev : logs) {
            System.out.println("Commit: " + rev /* + ", name: " + rev.getName() + ", id: " + rev.getId().getName() */);
        }

See also my jgit-cookbook for some related examples.