WrongRepositoryStateException, NoMessageException, NoHeadException,
RefNotFoundException, GitAPIException {
checkCallable();
try {
SubmoduleWalk generator = SubmoduleWalk.forIndex(repo);
if (!paths.isEmpty())
generator.setFilter(PathFilterGroup.createFromStrings(paths));
List<String> updated = new ArrayList<String>();
while (generator.next()) {
// Skip submodules not registered in .gitmodules file
if (generator.getModulesPath() == null)
continue;
// Skip submodules not registered in parent repository's config
String url = generator.getConfigUrl();
if (url == null)
continue;
Repository submoduleRepo = generator.getRepository();
// Clone repository is not present
if (submoduleRepo == null) {
CloneCommand clone = Git.cloneRepository();
configure(clone);
clone.setURI(url);
clone.setDirectory(generator.getDirectory());
if (monitor != null)
clone.setProgressMonitor(monitor);
submoduleRepo = clone.call().getRepository();
}
try {
RevWalk walk = new RevWalk(submoduleRepo);
RevCommit commit = walk
.parseCommit(generator.getObjectId());
String update = generator.getConfigUpdate();
if (ConfigConstants.CONFIG_KEY_MERGE.equals(update)) {
MergeCommand merge = new MergeCommand(submoduleRepo);
merge.include(commit);
merge.call();
} else if (ConfigConstants.CONFIG_KEY_REBASE.equals(update)) {
RebaseCommand rebase = new RebaseCommand(submoduleRepo);
rebase.setUpstream(commit);
rebase.call();
} else {
// Checkout commit referenced in parent repository's
// index as a detached HEAD
DirCacheCheckout co = new DirCacheCheckout(
submoduleRepo, submoduleRepo.lockDirCache(),
commit.getTree());
co.setFailOnConflict(true);
co.checkout();
RefUpdate refUpdate = submoduleRepo.updateRef(
Constants.HEAD, true);
refUpdate.setNewObjectId(commit);
refUpdate.forceUpdate();
}
} finally {
submoduleRepo.close();
}
updated.add(generator.getPath());
}
return updated;
} catch (IOException e) {
throw new JGitInternalException(e.getMessage(), e);
} catch (ConfigInvalidException e) {