comparison hgext/evolve.py @ 1471:4140d680784e

evolve: (issue4386) cleanup, split, fold and bijection in `hg prune`

Before this patch, the prune command was splitting and folding implicitely
based on the number of successors and precursors. This patch makes the
two behavior explicit by requesting a flag to perform a split or a fold.

1470:c3f6e97c71b1

    [('n', 'new', [], _("successor changeset (DEPRECATED)")),
     ('s', 'succ', [], _("successor changeset")),
     ('r', 'rev', [], _("revisions to prune")),
     ('k', 'keep', None, _("does not modify working copy during prune")),
     ('', 'biject', False, _("do a 1-1 map between rev and successor ranges")),
     ('B', 'bookmark', '', _("remove revs only reachable from given"
                             " bookmark"))] + metadataopts,
    _('[OPTION] [-r] REV...'))
    # -U  --noupdate option to prevent wc update and or bookmarks update ?
def cmdprune(ui, repo, *revs, **opts):

    You can use the ``--biject`` option to specify a 1-1 (bijection) between
    revisions to prune and successor changesets. This option may be removed in
    a future release (with the functionality absorbed automatically).

    """
    revs = scmutil.revrange(repo, list(revs) + opts.get('rev'))
    succs = opts['new'] + opts['succ']
    bookmark = opts.get('bookmark')
    metadata = _getmetadata(**opts)
    biject = opts.get('biject')

    if bookmark:
        marks,revs = _reachablefrombookmark(repo, revs, bookmark)
        if not revs:
            # no revisions to prune - delete bookmark immediately

        sucs.sort()
        sucs = tuple(repo[n] for n in sucs)
        if not biject and len(sucs) > 1 and len(precs) > 1:
            msg = "Can't use multiple successors for multiple precursors"
            raise util.Abort(msg)

        if biject and len(sucs) != len(precs):
            msg = "Can't use %d successors for %d precursors" \
                % (len(sucs), len(precs))
            raise util.Abort(msg)

        relations = [(p, sucs) for p in precs]
        if biject:
            relations = [(p, (s,)) for p, s in zip(precs, sucs)]

        wdp = repo['.']

        if len(sucs) == 1 and len(precs) == 1 and wdp in precs:
            # '.' killed, so update to the successor

1471:4140d680784e

    [('n', 'new', [], _("successor changeset (DEPRECATED)")),
     ('s', 'succ', [], _("successor changeset")),
     ('r', 'rev', [], _("revisions to prune")),
     ('k', 'keep', None, _("does not modify working copy during prune")),
     ('', 'biject', False, _("do a 1-1 map between rev and successor ranges")),
     ('', 'fold', False, _("record a fold (multiple precursors, one successors)")),
     ('', 'split', False, _("record a split (on precursor, multiple successors)")),
     ('B', 'bookmark', '', _("remove revs only reachable from given"
                             " bookmark"))] + metadataopts,
    _('[OPTION] [-r] REV...'))
    # -U  --noupdate option to prevent wc update and or bookmarks update ?
def cmdprune(ui, repo, *revs, **opts):

    You can use the ``--biject`` option to specify a 1-1 (bijection) between
    revisions to prune and successor changesets. This option may be removed in
    a future release (with the functionality absorbed automatically).

    If you specify multiple revisions in --succ, you are recording a "split"
    and have to acknowledge it by usng --split. The same logic apply when you
    prune multiple changesets with a single successors, this will record a
    "fold" requires a --fold flag.
    """
    revs = scmutil.revrange(repo, list(revs) + opts.get('rev'))
    succs = opts['new'] + opts['succ']
    bookmark = opts.get('bookmark')
    metadata = _getmetadata(**opts)
    biject = opts.get('biject')
    fold = opts.get('fold')
    split = opts.get('split')

    options = [o for o in ('biject', 'fold', 'split') if opts.get(o)]
    if 1 < len(options):
        raise util.Abort(_("can only specify one of %s") % ', '.join(options))

    if bookmark:
        marks,revs = _reachablefrombookmark(repo, revs, bookmark)
        if not revs:
            # no revisions to prune - delete bookmark immediately

        sucs.sort()
        sucs = tuple(repo[n] for n in sucs)
        if not biject and len(sucs) > 1 and len(precs) > 1:
            msg = "Can't use multiple successors for multiple precursors"
            raise util.Abort(msg)
        elif biject and len(sucs) != len(precs):
            msg = "Can't use %d successors for %d precursors" \
                % (len(sucs), len(precs))
            raise util.Abort(msg)
        elif (len(precs) == 1 and len(sucs) > 1) and not split:
            msg = "please add --split if you want to do a split"
            raise util.Abort(msg)
        elif len(sucs) == 1 and len(precs) > 1 and not fold:
            msg = "please add --fold if you want to do a fold"
            raise util.Abort(msg)
        elif biject:
            relations = [(p, (s,)) for p, s in zip(precs, sucs)]
        else:
            relations = [(p, sucs) for p in precs]

        wdp = repo['.']

        if len(sucs) == 1 and len(precs) == 1 and wdp in precs:
            # '.' killed, so update to the successor