comparison mercurial/copies.py @ 43785:3b039e43a1e6

copies: do not initialize the dictionary with root in changeset copies

We don't strictly need the dict to be prefiled with `{}`. Not doing so will make
the next changeset simpler. This part of a preparation to use native code for
this part of copy tracing.

43784:995066c41bb2

    iterrevs = set(from_head)
    iterrevs &= mrset
    iterrevs.update(roots)
    iterrevs.remove(b.rev())
    all_copies = {r: {} for r in roots}
    alwaysmatch = match.always()
    for r in sorted(iterrevs):
        copies = all_copies.pop(r)
        for i, c in enumerate(children[r]):
            p1, p2, p1copies, p2copies, removed = revinfo(c)
            if r == p1:
                parent = 1
                childcopies = p1copies

43785:3b039e43a1e6

    iterrevs = set(from_head)
    iterrevs &= mrset
    iterrevs.update(roots)
    iterrevs.remove(b.rev())
    all_copies = {}
    alwaysmatch = match.always()
    for r in sorted(iterrevs):
        copies = all_copies.pop(r, None)
        if copies is None:
            # this is a root
            copies = {}
        for i, c in enumerate(children[r]):
            p1, p2, p1copies, p2copies, removed = revinfo(c)
            if r == p1:
                parent = 1
                childcopies = p1copies