view hgext3rd/topic/compat.py @ 6889:a66cf9008781

obslog: also display patch for rebased changesets

This applies the same logic that is used for "merge-diff" to rebased
changesets. The successors' content is compared to the content of the
predecessors rebased in-memory on the new parents.

This highlights the changes that were actually introduced while rebasing (like
conflict resolution or API adjustment).

As a side effect, obslog now also outputs slightly more diffs for splits,
showing what parts of the original big changeset were moved to the smaller
split components (but for now it only works for the first few changesets).

# Copyright 2017 FUJIWARA Katsunori <[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 __future__ import absolute_import

from mercurial.i18n import _
from mercurial import (
    cmdutil,
    error,
    extensions,
    pycompat,
    util,
)

if pycompat.ispy3:
    def branchmapitems(branchmap):
        return branchmap.items()
else:
    # py3-transform: off
    def branchmapitems(branchmap):
        return branchmap.iteritems()
    # py3-transform: on

# nodemap.get and index.[has_node|rev|get_rev]
# hg <= 5.2 (02802fa87b74)
def getgetrev(cl):
    """Returns index.get_rev or nodemap.get (for pre-5.3 Mercurial)."""
    if util.safehasattr(cl.index, 'get_rev'):
        return cl.index.get_rev
    return cl.nodemap.get

# hg <= 5.4 (e2d17974a869)
def nonpublicphaseroots(repo):
    if util.safehasattr(repo._phasecache, 'nonpublicphaseroots'):
        return repo._phasecache.nonpublicphaseroots(repo)
    return set().union(
        *[roots for roots in repo._phasecache.phaseroots[1:] if roots]
    )

def overridecommitstatus(overridefn):
    code = cmdutil.commitstatus.__code__
    if r'opts' in code.co_varnames[code.co_argcount:]:
        # commitstatus(..., **opts)
        extensions.wrapfunction(cmdutil, 'commitstatus', overridefn)
    elif r'tip' in code.co_varnames:
        # hg <= 6.5 (489268c8ee7e)
        def _override(orig, repo, node, branch, bheads=None, tip=None, opts=None):
            def _orig(repo, node, branch, bheads=None, tip=None, **opts):
                opts = pycompat.byteskwargs(opts)
                return orig(repo, node, branch, bheads=bheads, tip=tip, opts=opts)
            if opts is None:
                opts = {}
            opts = pycompat.strkwargs(opts)
            return overridefn(_orig, repo, node, branch, bheads=bheads, tip=tip, **opts)
        extensions.wrapfunction(cmdutil, 'commitstatus', _override)
    else:
        # hg <= 5.6 (976b26bdd0d8)
        def _override(orig, repo, node, branch, bheads=None, opts=None):
            def _orig(repo, node, branch, bheads=None, **opts):
                opts = pycompat.byteskwargs(opts)
                return orig(repo, node, branch, bheads=bheads, opts=opts)
            if opts is None:
                opts = {}
            opts = pycompat.strkwargs(opts)
            return overridefn(_orig, repo, node, branch, bheads=bheads, **opts)
        extensions.wrapfunction(cmdutil, 'commitstatus', _override)

if util.safehasattr(error, 'InputError'):
    InputError = error.InputError
else:
    # hg <= 5.6 (8d72e29ad1e0)
    InputError = error.Abort

if util.safehasattr(error, 'StateError'):
    StateError = error.StateError
else:
    # hg <= 5.6 (527ce85c2e60)
    StateError = error.Abort

if util.safehasattr(error, 'CanceledError'):
    CanceledError = error.CanceledError
else:
    # hg <= 5.6 (ac362d5a7893)
    CanceledError = error.Abort

if util.safehasattr(cmdutil, 'check_at_most_one_arg'):
    def check_at_most_one_arg(opts, *args):
        return cmdutil.check_at_most_one_arg(opts, *args)
else:
    # hg <= 5.2 (d587937600be)
    def check_at_most_one_arg(opts, *args):
        def to_display(name):
            return pycompat.sysbytes(name).replace(b'_', b'-')

        previous = None
        for x in args:
            if opts.get(x):
                if previous:
                    raise InputError(_(b'cannot specify both --%s and --%s')
                                     % (to_display(previous), to_display(x)))
                previous = x
        return previous

if util.safehasattr(cmdutil, 'check_incompatible_arguments'):
    code = cmdutil.check_incompatible_arguments.__code__
    if r'others' in code.co_varnames[:code.co_argcount]:
        def check_incompatible_arguments(opts, first, others):
            return cmdutil.check_incompatible_arguments(opts, first, others)
    else:
        # hg <= 5.3 (d4c1501225c4)
        def check_incompatible_arguments(opts, first, others):
            return cmdutil.check_incompatible_arguments(opts, first, *others)
else:
    # hg <= 5.2 (023ad45e2fd2)
    def check_incompatible_arguments(opts, first, others):
        for other in others:
            check_at_most_one_arg(opts, first, other)