/**
* Convert push remote refs update specification from {@link RefSpec} form to {@link
* RemoteRefUpdate}. Conversion expands wildcards by matching source part to local refs.
* expectedOldObjectId in RemoteRefUpdate is always set as null. Tracking branch is configured if
* RefSpec destination matches source of any fetch ref spec for this transport remote
* configuration.
*
* @param db local database.
* @param specs collection of RefSpec to convert.
* @param fetchSpecs fetch specifications used for finding localtracking refs. May be null or
* empty collection.
* @return collection of set up {@link RemoteRefUpdate}.
* @throws IOException when problem occurred during conversion or specification set up: most
* probably, missing objects or refs.
*/
public static Collection<RemoteRefUpdate> findRemoteRefUpdatesFor(
final Repository db, final Collection<RefSpec> specs, Collection<RefSpec> fetchSpecs)
throws IOException {
if (fetchSpecs == null) fetchSpecs = Collections.emptyList();
final List<RemoteRefUpdate> result = new LinkedList<RemoteRefUpdate>();
final Collection<RefSpec> procRefs = expandPushWildcardsFor(db, specs);
for (final RefSpec spec : procRefs) {
String srcSpec = spec.getSource();
final Ref srcRef = db.getRef(srcSpec);
if (srcRef != null) srcSpec = srcRef.getName();
String destSpec = spec.getDestination();
if (destSpec == null) {
// No destination (no-colon in ref-spec), DWIMery assumes src
//
destSpec = srcSpec;
}
if (srcRef != null && !destSpec.startsWith(Constants.R_REFS)) {
// Assume the same kind of ref at the destination, e.g.
// "refs/heads/foo:master", DWIMery assumes master is also
// under "refs/heads/".
//
final String n = srcRef.getName();
final int kindEnd = n.indexOf('/', Constants.R_REFS.length());
destSpec = n.substring(0, kindEnd + 1) + destSpec;
}
final boolean forceUpdate = spec.isForceUpdate();
final String localName = findTrackingRefName(destSpec, fetchSpecs);
final RemoteRefUpdate rru =
new RemoteRefUpdate(db, srcSpec, destSpec, forceUpdate, localName, null);
result.add(rru);
}
return result;
}
