dirstate-tree: Remove newly-empty nodes after removing a `DirstateEntry`
This is actually necessary to make `DirstateMap::has_dir` correct, since it
assumes that a node without a `DirstateEntry` has at least one descedant node
with a `DirstateEntry`.
This bug would become apparent when a later changeset persists tree nodes
on disk in the "dirstate-v2" format.
Differential Revision: https://phab.mercurial-scm.org/D10706
# 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 (
cmdutil,
commands,
context,
copies as copiesmod,
error,
obsutil,
pathutil,
pycompat,
registrar,
rewriteutil,
scmutil,
)
cmdtable = {}
command = registrar.command(cmdtable)
configtable = {}
configitem = registrar.configitem(configtable)
configitem(
b'experimental',
b'uncommitondirtywdir',
default=False,
)
configitem(
b'experimental',
b'uncommit.keep',
default=False,
)
# 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 = b'ships-with-hg-core'
def _commitfiltered(
repo, ctx, match, keepcommit, message=None, user=None, date=None
):
"""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 = {f for f in initialfiles if match(f)}
# No files matched commit, so nothing excluded
if not exclude:
return None
# return the p1 so that we don't create an obsmarker later
if not keepcommit:
return ctx.p1().node()
files = initialfiles - exclude
# Filter copies
copied = copiesmod.pathcopies(base, ctx)
copied = {
dst: src for dst, src in pycompat.iteritems(copied) 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,
memctx,
fctx.path(),
fctx.data(),
fctx.islink(),
fctx.isexec(),
copysource=copied.get(path),
)
return mctx
if not files:
repo.ui.status(_(b"note: keeping empty commit\n"))
if message is None:
message = ctx.description()
if not user:
user = ctx.user()
if not date:
date = ctx.date()
new = context.memctx(
repo,
parents=[base.node(), repo.nullid],
text=message,
files=files,
filectxfn=filectxfn,
user=user,
date=date,
extra=ctx.extra(),
)
return repo.commitctx(new)
@command(
b'uncommit',
[
(b'', b'keep', None, _(b'allow an empty commit after uncommitting')),
(
b'',
b'allow-dirty-working-copy',
False,
_(b'allow uncommit with outstanding changes'),
),
(b'n', b'note', b'', _(b'store a note on uncommit'), _(b'TEXT')),
]
+ commands.walkopts
+ commands.commitopts
+ commands.commitopts2
+ commands.commitopts3,
_(b'[OPTION]... [FILE]...'),
helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
)
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.
If no files are specified, the commit will be pruned, unless --keep is
given.
"""
opts = pycompat.byteskwargs(opts)
cmdutil.checknotesize(ui, opts)
cmdutil.resolvecommitoptions(ui, opts)
with repo.wlock(), repo.lock():
st = repo.status()
m, a, r, d = st.modified, st.added, st.removed, st.deleted
isdirtypath = any(set(m + a + r + d) & set(pats))
allowdirtywcopy = opts[
b'allow_dirty_working_copy'
] or repo.ui.configbool(b'experimental', b'uncommitondirtywdir')
if not allowdirtywcopy and (not pats or isdirtypath):
cmdutil.bailifchanged(
repo,
hint=_(b'requires --allow-dirty-working-copy to uncommit'),
)
old = repo[b'.']
rewriteutil.precheck(repo, [old.rev()], b'uncommit')
if len(old.parents()) > 1:
raise error.InputError(_(b"cannot uncommit merge changeset"))
match = scmutil.match(old, pats, opts)
# Check all explicitly given files; abort if there's a problem.
if match.files():
s = old.status(old.p1(), match, listclean=True)
eligible = set(s.added) | set(s.modified) | set(s.removed)
badfiles = set(match.files()) - eligible
# Naming a parent directory of an eligible file is OK, even
# if not everything tracked in that directory can be
# uncommitted.
if badfiles:
badfiles -= {f for f in pathutil.dirs(eligible)}
for f in sorted(badfiles):
if f in s.clean:
hint = _(
b"file was not changed in working directory parent"
)
elif repo.wvfs.exists(f):
hint = _(b"file was untracked in working directory parent")
else:
hint = _(b"file does not exist")
raise error.InputError(
_(b'cannot uncommit "%s"') % scmutil.getuipathfn(repo)(f),
hint=hint,
)
with repo.transaction(b'uncommit'):
if not (opts[b'message'] or opts[b'logfile']):
opts[b'message'] = old.description()
message = cmdutil.logmessage(ui, opts)
keepcommit = pats
if not keepcommit:
if opts.get(b'keep') is not None:
keepcommit = opts.get(b'keep')
else:
keepcommit = ui.configbool(
b'experimental', b'uncommit.keep'
)
newid = _commitfiltered(
repo,
old,
match,
keepcommit,
message=message,
user=opts.get(b'user'),
date=opts.get(b'date'),
)
if newid is None:
ui.status(_(b"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()] = ()
with repo.dirstate.parentchange():
scmutil.movedirstate(repo, repo[newid], match)
scmutil.cleanupnodes(repo, mapping, b'uncommit', fixphase=True)
def predecessormarkers(ctx):
"""yields the obsolete markers marking the given changeset as a successor"""
for data in ctx.repo().obsstore.predecessors.get(ctx.node(), ()):
yield obsutil.marker(ctx.repo(), data)
@command(
b'unamend',
[],
helpcategory=command.CATEGORY_CHANGE_MANAGEMENT,
helpbasic=True,
)
def unamend(ui, repo, **opts):
"""undo the most recent amend operation on a current changeset
This command will roll back to the previous version of a changeset,
leaving working directory in state in which it was before running
`hg amend` (e.g. files modified as part of an amend will be
marked as modified `hg status`)
"""
unfi = repo.unfiltered()
with repo.wlock(), repo.lock(), repo.transaction(b'unamend'):
# identify the commit from which to unamend
curctx = repo[b'.']
rewriteutil.precheck(repo, [curctx.rev()], b'unamend')
# identify the commit to which to unamend
markers = list(predecessormarkers(curctx))
if len(markers) != 1:
e = _(b"changeset must have one predecessor, found %i predecessors")
raise error.InputError(e % len(markers))
prednode = markers[0].prednode()
predctx = unfi[prednode]
# add an extra so that we get a new hash
# note: allowing unamend to undo an unamend is an intentional feature
extras = predctx.extra()
extras[b'unamend_source'] = curctx.hex()
def filectxfn(repo, ctx_, path):
try:
return predctx.filectx(path)
except KeyError:
return None
# Make a new commit same as predctx
newctx = context.memctx(
repo,
parents=(predctx.p1(), predctx.p2()),
text=predctx.description(),
files=predctx.files(),
filectxfn=filectxfn,
user=predctx.user(),
date=predctx.date(),
extra=extras,
)
newprednode = repo.commitctx(newctx)
newpredctx = repo[newprednode]
dirstate = repo.dirstate
with dirstate.parentchange():
scmutil.movedirstate(repo, newpredctx)
mapping = {curctx.node(): (newprednode,)}
scmutil.cleanupnodes(repo, mapping, b'unamend', fixphase=True)