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uncommit.py
187 lines | 6.4 KiB | text/x-python | PythonLexer
Pulkit Goyal
uncommit: move fb-extension to core which uncommits a changeset...
r34193 # uncommit - undo the actions of a commit
#
# Copyright 2011 Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
# Logilab SA <contact@logilab.fr>
# Pierre-Yves David <pierre-yves.david@ens-lyon.org>
# Patrick Mezard <patrick@mezard.eu>
# Copyright 2016 Facebook, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""uncommit part or all of a local changeset (EXPERIMENTAL)
This command undoes the effect of a local commit, returning the affected
files to their uncommitted state. This means that files modified, added or
removed in the changeset will be left unchanged, and so will remain modified,
added and removed in the working directory.
"""
from __future__ import absolute_import
from mercurial.i18n import _
from mercurial import (
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r34285 cmdutil,
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r34193 commands,
context,
copies,
error,
node,
obsolete,
registrar,
scmutil,
)
cmdtable = {}
command = registrar.command(cmdtable)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = 'ships-with-hg-core'
def _commitfiltered(repo, ctx, match, allowempty):
"""Recommit ctx with changed files not in match. Return the new
node identifier, or None if nothing changed.
"""
base = ctx.p1()
# ctx
initialfiles = set(ctx.files())
exclude = set(f for f in initialfiles if match(f))
# No files matched commit, so nothing excluded
if not exclude:
return None
files = (initialfiles - exclude)
# return the p1 so that we don't create an obsmarker later
if not files and not allowempty:
return ctx.parents()[0].node()
# Filter copies
copied = copies.pathcopies(base, ctx)
copied = dict((dst, src) for dst, src in copied.iteritems()
if dst in files)
def filectxfn(repo, memctx, path, contentctx=ctx, redirect=()):
if path not in contentctx:
return None
fctx = contentctx[path]
mctx = context.memfilectx(repo, fctx.path(), fctx.data(),
fctx.islink(),
fctx.isexec(),
copied=copied.get(path))
return mctx
new = context.memctx(repo,
parents=[base.node(), node.nullid],
text=ctx.description(),
files=files,
filectxfn=filectxfn,
user=ctx.user(),
date=ctx.date(),
extra=ctx.extra())
# phase handling
commitphase = ctx.phase()
overrides = {('phases', 'new-commit'): commitphase}
with repo.ui.configoverride(overrides, 'uncommit'):
newid = repo.commitctx(new)
return newid
def _uncommitdirstate(repo, oldctx, match):
"""Fix the dirstate after switching the working directory from
oldctx to a copy of oldctx not containing changed files matched by
match.
"""
ctx = repo['.']
ds = repo.dirstate
copies = dict(ds.copies())
s = repo.status(oldctx.p1(), oldctx, match=match)
for f in s.modified:
if ds[f] == 'r':
# modified + removed -> removed
continue
ds.normallookup(f)
for f in s.added:
if ds[f] == 'r':
# added + removed -> unknown
ds.drop(f)
elif ds[f] != 'a':
ds.add(f)
for f in s.removed:
if ds[f] == 'a':
# removed + added -> normal
ds.normallookup(f)
elif ds[f] != 'r':
ds.remove(f)
# Merge old parent and old working dir copies
oldcopies = {}
for f in (s.modified + s.added):
src = oldctx[f].renamed()
if src:
oldcopies[f] = src[0]
oldcopies.update(copies)
copies = dict((dst, oldcopies.get(src, src))
for dst, src in oldcopies.iteritems())
# Adjust the dirstate copies
for dst, src in copies.iteritems():
if (src not in ctx or dst in ctx or ds[dst] != 'a'):
src = None
ds.copy(src, dst)
@command('uncommit',
Pulkit Goyal
uncommit: rename the flag 'empty' to 'keep' which retains empty changeset...
r34284 [('', 'keep', False, _('allow an empty commit after uncommiting')),
Pulkit Goyal
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r34193 ] + commands.walkopts,
_('[OPTION]... [FILE]...'))
def uncommit(ui, repo, *pats, **opts):
"""uncommit part or all of a local changeset
This command undoes the effect of a local commit, returning the affected
files to their uncommitted state. This means that files modified or
deleted in the changeset will be left unchanged, and so will remain
modified in the working directory.
"""
with repo.wlock(), repo.lock():
wctx = repo[None]
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r34286 if not pats and not repo.ui.configbool('experimental',
'uncommitondirtywdir', False):
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r34285 cmdutil.bailifchanged(repo)
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r34193 if wctx.parents()[0].node() == node.nullid:
raise error.Abort(_("cannot uncommit null changeset"))
if len(wctx.parents()) > 1:
raise error.Abort(_("cannot uncommit while merging"))
old = repo['.']
if not old.mutable():
raise error.Abort(_('cannot uncommit public changesets'))
if len(old.parents()) > 1:
raise error.Abort(_("cannot uncommit merge changeset"))
allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)
if not allowunstable and old.children():
raise error.Abort(_('cannot uncommit changeset with children'))
with repo.transaction('uncommit'):
match = scmutil.match(old, pats, opts)
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r34284 newid = _commitfiltered(repo, old, match, opts.get('keep'))
Pulkit Goyal
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r34193 if newid is None:
ui.status(_("nothing to uncommit\n"))
return 1
mapping = {}
if newid != old.p1().node():
# Move local changes on filtered changeset
mapping[old.node()] = (newid,)
else:
# Fully removed the old commit
mapping[old.node()] = ()
scmutil.cleanupnodes(repo, mapping, 'uncommit')
with repo.dirstate.parentchange():
repo.dirstate.setparents(newid, node.nullid)
_uncommitdirstate(repo, old, match)