public boolean delete(GeogigTransaction transaction, Feature f) throws Exception {
final WorkingTree workTree =
(transaction != null ? transaction.workingTree() : repo.workingTree());
Name name = f.getType().getName();
String localPart = name.getLocalPart();
String id = f.getIdentifier().getID();
boolean existed = workTree.delete(localPart, id);
return existed;
}
/** Inserts the feature to the index but does not stages it to be committed */
public ObjectId insert(GeogigTransaction transaction, Feature f) throws Exception {
final WorkingTree workTree =
(transaction != null ? transaction.workingTree() : repo.workingTree());
Name name = f.getType().getName();
String parentPath = name.getLocalPart();
Node ref = workTree.insert(parentPath, f);
ObjectId objectId = ref.getObjectId();
return objectId;
}
/** Inserts the Feature to the index and stages it to be committed. */
public ObjectId insertAndAdd(GeogigTransaction transaction, Feature f) throws Exception {
ObjectId objectId = insert(transaction, f);
if (transaction != null) {
transaction.command(AddOp.class).call();
} else {
geogig.command(AddOp.class).call();
}
return objectId;
}
private boolean repositoryChanged(Ref ref) {
Optional<Ref> transactionOriginal =
transaction
.command(RefParse.class)
.setName(ref.getName().replace("refs/", "orig/refs/"))
.call();
if (transactionOriginal.isPresent()) {
return !ref.getObjectId().equals(transactionOriginal.get().getObjectId());
}
// Ref was created in transaction and on the repo
return true;
}
/**
* Deletes a feature from the index
*
* @param f
* @return
* @throws Exception
*/
public boolean deleteAndAdd(GeogigTransaction transaction, Feature f) throws Exception {
boolean existed = delete(transaction, f);
if (existed) {
if (transaction != null) {
transaction.command(AddOp.class).call();
} else {
geogig.command(AddOp.class).call();
}
}
return existed;
}
/**
* Ends the current transaction by either committing the changes or discarding them depending on
* whether cancel is true or not.
*
* @return Boolean - true if the transaction was successfully closed
*/
@Override
protected Boolean _call() {
Preconditions.checkState(
!(context instanceof GeogigTransaction), "Cannot end a transaction within a transaction!");
Preconditions.checkArgument(transaction != null, "No transaction was specified!");
try {
if (!cancel) {
updateRefs();
}
} finally {
// Erase old refs
transaction.close();
}
// Success
return true;
}
private ImmutableSet<Ref> getChangedRefs() {
ImmutableSet<Ref> changedRefs = transaction.getChangedRefs();
return changedRefs;
}
private void updateRefs() {
final Optional<Ref> currHead = command(RefParse.class).setName(Ref.HEAD).call();
final String currentBranch;
if (currHead.isPresent() && currHead.get() instanceof SymRef) {
currentBranch = ((SymRef) currHead.get()).getTarget();
} else {
currentBranch = "";
}
ImmutableSet<Ref> changedRefs = getChangedRefs();
// Lock the repository
try {
refDatabase().lock();
} catch (TimeoutException e) {
Throwables.propagate(e);
}
try {
// Update refs
for (Ref ref : changedRefs) {
if (!ref.getName().startsWith(Ref.REFS_PREFIX)) {
continue;
}
Ref updatedRef = ref;
Optional<Ref> repoRef = command(RefParse.class).setName(ref.getName()).call();
if (repoRef.isPresent() && repositoryChanged(repoRef.get())) {
if (rebase) {
// Try to rebase
transaction.command(CheckoutOp.class).setSource(ref.getName()).setForce(true).call();
try {
transaction
.command(RebaseOp.class)
.setUpstream(Suppliers.ofInstance(repoRef.get().getObjectId()))
.call();
} catch (RebaseConflictsException e) {
Throwables.propagate(e);
}
updatedRef = transaction.command(RefParse.class).setName(ref.getName()).call().get();
} else {
// sync transactions have to use merge to prevent divergent history
transaction.command(CheckoutOp.class).setSource(ref.getName()).setForce(true).call();
try {
transaction
.command(MergeOp.class)
.setAuthor(authorName.orNull(), authorEmail.orNull())
.addCommit(Suppliers.ofInstance(repoRef.get().getObjectId()))
.call();
} catch (NothingToCommitException e) {
// The repo commit is already in our history, this is a fast
// forward.
}
updatedRef = transaction.command(RefParse.class).setName(ref.getName()).call().get();
}
}
LOGGER.debug(
String.format(
"commit %s %s -> %s", ref.getName(), ref.getObjectId(), updatedRef.getObjectId()));
command(UpdateRef.class)
.setName(ref.getName())
.setNewValue(updatedRef.getObjectId())
.call();
if (currentBranch.equals(ref.getName())) {
// Update HEAD, WORK_HEAD and STAGE_HEAD
command(UpdateSymRef.class).setName(Ref.HEAD).setNewValue(ref.getName()).call();
command(UpdateRef.class)
.setName(Ref.WORK_HEAD)
.setNewValue(updatedRef.getObjectId())
.call();
command(UpdateRef.class)
.setName(Ref.STAGE_HEAD)
.setNewValue(updatedRef.getObjectId())
.call();
}
}
// TODO: What happens if there are unstaged or staged changes in the repository when
// a transaction is committed?
} finally {
// Unlock the repository
refDatabase().unlock();
}
}
