private void negotiateBegin() throws IOException {
walk.resetRetain(REACHABLE, ADVERTISED);
walk.markStart(reachableCommits);
walk.sort(RevSort.COMMIT_TIME_DESC);
walk.setRevFilter(
new RevFilter() {
@Override
public RevFilter clone() {
return this;
}
@Override
public boolean include(final RevWalk walker, final RevCommit c) {
final boolean remoteKnowsIsCommon = c.has(COMMON);
if (c.has(ADVERTISED)) {
// Remote advertised this, and we have it, hence common.
// Whether or not the remote knows that fact is tested
// before we added the flag. If the remote doesn't know
// we have to still send them this object.
//
c.add(COMMON);
}
return !remoteKnowsIsCommon;
}
});
}
