view hgext3rd/evolve/compat.py @ 3363:380fa6e8baf2 stable

evolve: don't show working directory obsolete message if we were on it

This patch tweaks showing wc obsolete message functionality to not show the
message if the operation led us to the same changeset we were on before and it
didn't obsoleted it. This make failed updates, update on current changeset and a
pull with no change omit showing the message.

This has some cons like if you are on rev 1 which is obsolete and you do `hg up
<revset>` where revset is some revset which resolves to the rev 1, we won't show
the warning as shown earlier.

# Copyright 2017 Octobus <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""
Compatibility module
"""

from mercurial import (
    copies,
    context,
    hg,
    obsolete,
    revset,
    util,
)

try:
    from mercurial import obsutil
    obsutil.closestpredecessors
except ImportError:
    obsutil = None

from . import (
    exthelper,
)

eh = exthelper.exthelper()

if not util.safehasattr(hg, '_copycache'):
    # exact copy of relevantmarkers as in Mercurial-176d1a0ce385
    # this fixes relevant markers computation for version < hg-4.3
    @eh.wrapfunction(obsolete.obsstore, 'relevantmarkers')
    def relevantmarkers(orig, self, nodes):
        """return a set of all obsolescence markers relevant to a set of nodes.

        "relevant" to a set of nodes mean:

        - marker that use this changeset as successor
        - prune marker of direct children on this changeset
        - recursive application of the two rules on precursors of these markers

        It is a set so you cannot rely on order.

        Backport of mercurial changeset 176d1a0ce385 for version < 4.3
        """

        pendingnodes = set(nodes)
        seenmarkers = set()
        seennodes = set(pendingnodes)
        precursorsmarkers = self.predecessors
        succsmarkers = self.successors
        children = self.children
        while pendingnodes:
            direct = set()
            for current in pendingnodes:
                direct.update(precursorsmarkers.get(current, ()))
                pruned = [m for m in children.get(current, ()) if not m[1]]
                direct.update(pruned)
                pruned = [m for m in succsmarkers.get(current, ()) if not m[1]]
                direct.update(pruned)
            direct -= seenmarkers
            pendingnodes = set([m[0] for m in direct])
            seenmarkers |= direct
            pendingnodes -= seennodes
            seennodes |= pendingnodes
        return seenmarkers

# successors set move from mercurial.obsolete to mercurial.obsutil in 4.3
def successorssets(*args, **kwargs):
    func = getattr(obsutil, 'successorssets', None)
    if func is None:
        func = obsolete.successorssets
    return func(*args, **kwargs)

# allprecursors set move from mercurial.obsolete to mercurial.obsutil in 4.3
# allprecursors  was renamed into allpredecessors in 4.4
def allprecursors(*args, **kwargs):
    func = getattr(obsutil, 'allpredecessors', None)
    if func is None:
        func = getattr(obsutil, 'allprecursors', None)
        if func is None:
            func = obsolete.allprecursors
    return func(*args, **kwargs)

# compatibility layer for mercurial < 4.3
def bookmarkapplychanges(repo, tr, changes):
    """Apply a list of changes to bookmarks
    """
    bookmarks = repo._bookmarks
    if util.safehasattr(bookmarks, 'applychanges'):
        return bookmarks.applychanges(repo, tr, changes)
    for name, node in changes:
        if node is None:
            del bookmarks[name]
        else:
            bookmarks[name] = node
    bookmarks.recordchange(tr)

def isobsnotesupported():
    # hack to know obsnote is supported. The patches for obsnote support was
    # pushed before the obsfateprinter patches, so this will serve as a good
    # check
    if not obsutil:
        return False
    return util.safehasattr(obsutil, 'obsfateprinter')

# Evolution renaming compat

TROUBLES = {}

if not util.safehasattr(context.basectx, 'orphan'):
    TROUBLES['ORPHAN'] = 'unstable'
    context.basectx.orphan = context.basectx.unstable
else:
    TROUBLES['ORPHAN'] = 'orphan'

if not util.safehasattr(context.basectx, 'contentdivergent'):
    TROUBLES['CONTENTDIVERGENT'] = 'divergent'
    context.basectx.contentdivergent = context.basectx.divergent
else:
    TROUBLES['CONTENTDIVERGENT'] = 'content-divergent'

if not util.safehasattr(context.basectx, 'phasedivergent'):
    TROUBLES['PHASEDIVERGENT'] = 'bumped'
    context.basectx.phasedivergent = context.basectx.bumped
else:
    TROUBLES['PHASEDIVERGENT'] = 'phase-divergent'

if not util.safehasattr(context.basectx, 'isunstable'):
    context.basectx.isunstable = context.basectx.troubled

if not util.safehasattr(revset, 'orphan'):
    @eh.revset('orphan')
    def oprhanrevset(*args, **kwargs):
        return revset.unstable(*args, **kwargs)

if not util.safehasattr(revset, 'contentdivergent'):
    @eh.revset('contentdivergent')
    def contentdivergentrevset(*args, **kwargs):
        return revset.divergent(*args, **kwargs)

if not util.safehasattr(revset, 'phasedivergent'):
    @eh.revset('phasedivergent')
    def phasedivergentrevset(*args, **kwargs):
        return revset.bumped(*args, **kwargs)

if not util.safehasattr(context.basectx, 'instabilities'):
    def instabilities(self):
        """return the list of instabilities affecting this changeset.

        Instabilities are returned as strings. possible values are:
         - orphan,
         - phase-divergent,
         - content-divergent.
         """
        instabilities = []
        if self.orphan():
            instabilities.append('orphan')
        if self.phasedivergent():
            instabilities.append('phase-divergent')
        if self.contentdivergent():
            instabilities.append('content-divergent')
        return instabilities

    context.basectx.instabilities = instabilities

# XXX: Better detection of property cache
if 'predecessors' not in dir(obsolete.obsstore):
    @property
    def predecessors(self):
        return self.precursors

    obsolete.obsstore.predecessors = predecessors

if not util.safehasattr(obsolete, '_computeorphanset'):
    obsolete._computeorphanset = obsolete.cachefor('orphan')(obsolete._computeunstableset)

if not util.safehasattr(obsolete, '_computecontentdivergentset'):
    obsolete._computecontentdivergentset = obsolete.cachefor('contentdivergent')(obsolete._computedivergentset)

if not util.safehasattr(obsolete, '_computephasedivergentset'):
    obsolete._computephasedivergentset = obsolete.cachefor('phasedivergent')(obsolete._computebumpedset)

def startpager(ui, cmd):
    """function to start a pager in case ui.pager() exists"""
    if util.safehasattr(ui, 'pager'):
        ui.pager(cmd)

def duplicatecopies(repo, wctx, rev, fromrev, skiprev=None):
    # cannot use anything else until 4.3 support is dropped.
    assert wctx.rev() is None
    if copies.duplicatecopies.__code__.co_argcount < 5:
        # pre 4.4 duplicatecopies compat
        copies.duplicatecopies(repo, rev, fromrev, skiprev=skiprev)
    else:
        copies.duplicatecopies(repo, wctx, rev, fromrev, skiprev=skiprev)