comparison mercurial/copies.py @ 30229:69ffbbe73dd0 stable

merge: avoid superfluous filemerges when grafting through renames (issue5407)

This is a fix for a regression introduced by the patches for issue4028.

The test changes are due to us doing fewer _checkcopies searches now, which
makes some test outputs revert to the pre-issue4028 behavior. That issue itself
remains fixed, we only skip copy tracing for files where it isn't relevant.
As a nice side effect, this makes copy detection much faster when tracing
backwards through lots of renames.

30228:b9f7b0c10027

    # the base) this is more complicated as we must detect a divergence.
    # We use 'backwards = False' in that case.
    backwards = not remotebase and base != tca and f in mb
    getfctx = _makegetfctx(ctx)

    of = None
    seen = set([f])
    for oc in getfctx(f, m1[f]).ancestors():
        ocr = oc.linkrev()
        of = oc.path()

30229:69ffbbe73dd0

    # the base) this is more complicated as we must detect a divergence.
    # We use 'backwards = False' in that case.
    backwards = not remotebase and base != tca and f in mb
    getfctx = _makegetfctx(ctx)

    if m1[f] == mb.get(f) and not remotebase:
        # Nothing to merge
        return

    of = None
    seen = set([f])
    for oc in getfctx(f, m1[f]).ancestors():
        ocr = oc.linkrev()
        of = oc.path()