# merge.py - directory-level update/merge handling for Mercurial
#
# Copyright 2006, 2007 Olivia Mackall <olivia@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
import collections
import struct
from .i18n import _
from .node import nullrev
from .thirdparty import attr
from .utils import stringutil
from .dirstateutils import timestamp
from . import (
copies,
encoding,
error,
filemerge,
match as matchmod,
mergestate as mergestatemod,
obsutil,
pathutil,
policy,
pycompat,
scmutil,
subrepoutil,
util,
worker,
)
_pack = struct.pack
_unpack = struct.unpack
def _getcheckunknownconfig(repo, section, name):
config = repo.ui.config(section, name)
valid = [b'abort', b'ignore', b'warn']
if config not in valid:
validstr = b', '.join([b"'" + v + b"'" for v in valid])
msg = _(b"%s.%s not valid ('%s' is none of %s)")
msg %= (section, name, config, validstr)
raise error.ConfigError(msg)
return config
def _checkunknownfile(repo, wctx, mctx, f, f2=None):
if wctx.isinmemory():
# Nothing to do in IMM because nothing in the "working copy" can be an
# unknown file.
#
# Note that we should bail out here, not in ``_checkunknownfiles()``,
# because that function does other useful work.
return False
if f2 is None:
f2 = f
return (
repo.wvfs.audit.check(f)
and repo.wvfs.isfileorlink(f)
and repo.dirstate.normalize(f) not in repo.dirstate
and mctx[f2].cmp(wctx[f])
)
class _unknowndirschecker:
"""
Look for any unknown files or directories that may have a path conflict
with a file. If any path prefix of the file exists as a file or link,
then it conflicts. If the file itself is a directory that contains any
file that is not tracked, then it conflicts.
Returns the shortest path at which a conflict occurs, or None if there is
no conflict.
"""
def __init__(self):
# A set of paths known to be good. This prevents repeated checking of
# dirs. It will be updated with any new dirs that are checked and found
# to be safe.
self._unknowndircache = set()
# A set of paths that are known to be absent. This prevents repeated
# checking of subdirectories that are known not to exist. It will be
# updated with any new dirs that are checked and found to be absent.
self._missingdircache = set()
def __call__(self, repo, wctx, f):
if wctx.isinmemory():
# Nothing to do in IMM for the same reason as ``_checkunknownfile``.
return False
# Check for path prefixes that exist as unknown files.
for p in reversed(list(pathutil.finddirs(f))):
if p in self._missingdircache:
return
if p in self._unknowndircache:
continue
if repo.wvfs.audit.check(p):
if (
repo.wvfs.isfileorlink(p)
and repo.dirstate.normalize(p) not in repo.dirstate
):
return p
if not repo.wvfs.lexists(p):
self._missingdircache.add(p)
return
self._unknowndircache.add(p)
# Check if the file conflicts with a directory containing unknown files.
if repo.wvfs.audit.check(f) and repo.wvfs.isdir(f):
# Does the directory contain any files that are not in the dirstate?
for p, dirs, files in repo.wvfs.walk(f):
for fn in files:
relf = util.pconvert(repo.wvfs.reljoin(p, fn))
relf = repo.dirstate.normalize(relf, isknown=True)
if relf not in repo.dirstate:
return f
return None
def _checkunknownfiles(repo, wctx, mctx, force, mresult, mergeforce):
"""
Considers any actions that care about the presence of conflicting unknown
files. For some actions, the result is to abort; for others, it is to
choose a different action.
"""
fileconflicts = set()
pathconflicts = set()
warnconflicts = set()
abortconflicts = set()
unknownconfig = _getcheckunknownconfig(repo, b'merge', b'checkunknown')
ignoredconfig = _getcheckunknownconfig(repo, b'merge', b'checkignored')
pathconfig = repo.ui.configbool(
b'experimental', b'merge.checkpathconflicts'
)
if not force:
def collectconflicts(conflicts, config):
if config == b'abort':
abortconflicts.update(conflicts)
elif config == b'warn':
warnconflicts.update(conflicts)
checkunknowndirs = _unknowndirschecker()
for f in mresult.files(
(
mergestatemod.ACTION_CREATED,
mergestatemod.ACTION_DELETED_CHANGED,
)
):
if _checkunknownfile(repo, wctx, mctx, f):
fileconflicts.add(f)
elif pathconfig and f not in wctx:
path = checkunknowndirs(repo, wctx, f)
if path is not None:
pathconflicts.add(path)
for f, args, msg in mresult.getactions(
[mergestatemod.ACTION_LOCAL_DIR_RENAME_GET]
):
if _checkunknownfile(repo, wctx, mctx, f, args[0]):
fileconflicts.add(f)
allconflicts = fileconflicts | pathconflicts
ignoredconflicts = {c for c in allconflicts if repo.dirstate._ignore(c)}
unknownconflicts = allconflicts - ignoredconflicts
collectconflicts(ignoredconflicts, ignoredconfig)
collectconflicts(unknownconflicts, unknownconfig)
else:
for f, args, msg in list(
mresult.getactions([mergestatemod.ACTION_CREATED_MERGE])
):
fl2, anc = args
different = _checkunknownfile(repo, wctx, mctx, f)
if repo.dirstate._ignore(f):
config = ignoredconfig
else:
config = unknownconfig
# The behavior when force is True is described by this table:
# config different mergeforce | action backup
# * n * | get n
# * y y | merge -
# abort y n | merge - (1)
# warn y n | warn + get y
# ignore y n | get y
#
# (1) this is probably the wrong behavior here -- we should
# probably abort, but some actions like rebases currently
# don't like an abort happening in the middle of
# merge.update.
if not different:
mresult.addfile(
f,
mergestatemod.ACTION_GET,
(fl2, False),
b'remote created',
)
elif mergeforce or config == b'abort':
mresult.addfile(
f,
mergestatemod.ACTION_MERGE,
(f, f, None, False, anc),
b'remote differs from untracked local',
)
elif config == b'abort':
abortconflicts.add(f)
else:
if config == b'warn':
warnconflicts.add(f)
mresult.addfile(
f,
mergestatemod.ACTION_GET,
(fl2, True),
b'remote created',
)
for f in sorted(abortconflicts):
warn = repo.ui.warn
if f in pathconflicts:
if repo.wvfs.isfileorlink(f):
warn(_(b"%s: untracked file conflicts with directory\n") % f)
else:
warn(_(b"%s: untracked directory conflicts with file\n") % f)
else:
warn(_(b"%s: untracked file differs\n") % f)
if abortconflicts:
raise error.StateError(
_(
b"untracked files in working directory "
b"differ from files in requested revision"
)
)
for f in sorted(warnconflicts):
if repo.wvfs.isfileorlink(f):
repo.ui.warn(_(b"%s: replacing untracked file\n") % f)
else:
repo.ui.warn(_(b"%s: replacing untracked files in directory\n") % f)
for f, args, msg in list(
mresult.getactions([mergestatemod.ACTION_CREATED])
):
backup = (
f in fileconflicts
or f in pathconflicts
or any(p in pathconflicts for p in pathutil.finddirs(f))
)
(flags,) = args
mresult.addfile(f, mergestatemod.ACTION_GET, (flags, backup), msg)
def _forgetremoved(wctx, mctx, branchmerge, mresult):
"""
Forget removed files
If we're jumping between revisions (as opposed to merging), and if
neither the working directory nor the target rev has the file,
then we need to remove it from the dirstate, to prevent the
dirstate from listing the file when it is no longer in the
manifest.
If we're merging, and the other revision has removed a file
that is not present in the working directory, we need to mark it
as removed.
"""
m = mergestatemod.ACTION_FORGET
if branchmerge:
m = mergestatemod.ACTION_REMOVE
for f in wctx.deleted():
if f not in mctx:
mresult.addfile(f, m, None, b"forget deleted")
if not branchmerge:
for f in wctx.removed():
if f not in mctx:
mresult.addfile(
f,
mergestatemod.ACTION_FORGET,
None,
b"forget removed",
)
def _checkcollision(repo, wmf, mresult):
"""
Check for case-folding collisions.
"""
# If the repo is narrowed, filter out files outside the narrowspec.
narrowmatch = repo.narrowmatch()
if not narrowmatch.always():
pmmf = set(wmf.walk(narrowmatch))
if mresult:
for f in list(mresult.files()):
if not narrowmatch(f):
mresult.removefile(f)
else:
# build provisional merged manifest up
pmmf = set(wmf)
if mresult:
# KEEP and EXEC are no-op
for f in mresult.files(
(
mergestatemod.ACTION_ADD,
mergestatemod.ACTION_ADD_MODIFIED,
mergestatemod.ACTION_FORGET,
mergestatemod.ACTION_GET,
mergestatemod.ACTION_CHANGED_DELETED,
mergestatemod.ACTION_DELETED_CHANGED,
)
):
pmmf.add(f)
for f in mresult.files((mergestatemod.ACTION_REMOVE,)):
pmmf.discard(f)
for f, args, msg in mresult.getactions(
[mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL]
):
f2, flags = args
pmmf.discard(f2)
pmmf.add(f)
for f in mresult.files((mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,)):
pmmf.add(f)
for f, args, msg in mresult.getactions([mergestatemod.ACTION_MERGE]):
f1, f2, fa, move, anc = args
if move:
pmmf.discard(f1)
pmmf.add(f)
# check case-folding collision in provisional merged manifest
foldmap = {}
for f in pmmf:
fold = util.normcase(f)
if fold in foldmap:
msg = _(b"case-folding collision between %s and %s")
msg %= (f, foldmap[fold])
raise error.StateError(msg)
foldmap[fold] = f
# check case-folding of directories
foldprefix = unfoldprefix = lastfull = b''
for fold, f in sorted(foldmap.items()):
if fold.startswith(foldprefix) and not f.startswith(unfoldprefix):
# the folded prefix matches but actual casing is different
msg = _(b"case-folding collision between %s and directory of %s")
msg %= (lastfull, f)
raise error.StateError(msg)
foldprefix = fold + b'/'
unfoldprefix = f + b'/'
lastfull = f
def _filesindirs(repo, manifest, dirs):
"""
Generator that yields pairs of all the files in the manifest that are found
inside the directories listed in dirs, and which directory they are found
in.
"""
for f in manifest:
for p in pathutil.finddirs(f):
if p in dirs:
yield f, p
break
def checkpathconflicts(repo, wctx, mctx, mresult):
"""
Check if any actions introduce path conflicts in the repository, updating
actions to record or handle the path conflict accordingly.
"""
mf = wctx.manifest()
# The set of local files that conflict with a remote directory.
localconflicts = set()
# The set of directories that conflict with a remote file, and so may cause
# conflicts if they still contain any files after the merge.
remoteconflicts = set()
# The set of directories that appear as both a file and a directory in the
# remote manifest. These indicate an invalid remote manifest, which
# can't be updated to cleanly.
invalidconflicts = set()
# The set of directories that contain files that are being created.
createdfiledirs = set()
# The set of files deleted by all the actions.
deletedfiles = set()
for f in mresult.files(
(
mergestatemod.ACTION_CREATED,
mergestatemod.ACTION_DELETED_CHANGED,
mergestatemod.ACTION_MERGE,
mergestatemod.ACTION_CREATED_MERGE,
)
):
# This action may create a new local file.
createdfiledirs.update(pathutil.finddirs(f))
if mf.hasdir(f):
# The file aliases a local directory. This might be ok if all
# the files in the local directory are being deleted. This
# will be checked once we know what all the deleted files are.
remoteconflicts.add(f)
# Track the names of all deleted files.
for f in mresult.files((mergestatemod.ACTION_REMOVE,)):
deletedfiles.add(f)
for (f, args, msg) in mresult.getactions((mergestatemod.ACTION_MERGE,)):
f1, f2, fa, move, anc = args
if move:
deletedfiles.add(f1)
for (f, args, msg) in mresult.getactions(
(mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,)
):
f2, flags = args
deletedfiles.add(f2)
# Check all directories that contain created files for path conflicts.
for p in createdfiledirs:
if p in mf:
if p in mctx:
# A file is in a directory which aliases both a local
# and a remote file. This is an internal inconsistency
# within the remote manifest.
invalidconflicts.add(p)
else:
# A file is in a directory which aliases a local file.
# We will need to rename the local file.
localconflicts.add(p)
pd = mresult.getfile(p)
if pd and pd[0] in (
mergestatemod.ACTION_CREATED,
mergestatemod.ACTION_DELETED_CHANGED,
mergestatemod.ACTION_MERGE,
mergestatemod.ACTION_CREATED_MERGE,
):
# The file is in a directory which aliases a remote file.
# This is an internal inconsistency within the remote
# manifest.
invalidconflicts.add(p)
# Rename all local conflicting files that have not been deleted.
for p in localconflicts:
if p not in deletedfiles:
ctxname = bytes(wctx).rstrip(b'+')
pnew = util.safename(p, ctxname, wctx, set(mresult.files()))
porig = wctx[p].copysource() or p
mresult.addfile(
pnew,
mergestatemod.ACTION_PATH_CONFLICT_RESOLVE,
(p, porig),
b'local path conflict',
)
mresult.addfile(
p,
mergestatemod.ACTION_PATH_CONFLICT,
(pnew, b'l'),
b'path conflict',
)
if remoteconflicts:
# Check if all files in the conflicting directories have been removed.
ctxname = bytes(mctx).rstrip(b'+')
for f, p in _filesindirs(repo, mf, remoteconflicts):
if f not in deletedfiles:
m, args, msg = mresult.getfile(p)
pnew = util.safename(p, ctxname, wctx, set(mresult.files()))
if m in (
mergestatemod.ACTION_DELETED_CHANGED,
mergestatemod.ACTION_MERGE,
):
# Action was merge, just update target.
mresult.addfile(pnew, m, args, msg)
else:
# Action was create, change to renamed get action.
fl = args[0]
mresult.addfile(
pnew,
mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
(p, fl),
b'remote path conflict',
)
mresult.addfile(
p,
mergestatemod.ACTION_PATH_CONFLICT,
(pnew, b'r'),
b'path conflict',
)
remoteconflicts.remove(p)
break
if invalidconflicts:
for p in invalidconflicts:
repo.ui.warn(_(b"%s: is both a file and a directory\n") % p)
raise error.StateError(
_(b"destination manifest contains path conflicts")
)
def _filternarrowactions(narrowmatch, branchmerge, mresult):
"""
Filters out actions that can ignored because the repo is narrowed.
Raise an exception if the merge cannot be completed because the repo is
narrowed.
"""
# We mutate the items in the dict during iteration, so iterate
# over a copy.
for f, action in mresult.filemap():
if narrowmatch(f):
pass
elif not branchmerge:
mresult.removefile(f) # just updating, ignore changes outside clone
elif action[0].no_op:
mresult.removefile(f) # merge does not affect file
elif action[0].narrow_safe:
if not f.endswith(b'/'):
mresult.removefile(f) # merge won't affect on-disk files
mresult.addcommitinfo(
f, b'outside-narrow-merge-action', action[0].changes
)
else: # TODO: handle the tree case
msg = _(
b'merge affects file \'%s\' outside narrow, '
b'which is not yet supported'
)
hint = _(b'merging in the other direction may work')
raise error.Abort(msg % f, hint=hint)
else:
msg = _(b'conflict in file \'%s\' is outside narrow clone')
raise error.StateError(msg % f)
class mergeresult:
"""An object representing result of merging manifests.
It has information about what actions need to be performed on dirstate
mapping of divergent renames and other such cases."""
def __init__(self):
"""
filemapping: dict of filename as keys and action related info as values
diverge: mapping of source name -> list of dest name for
divergent renames
renamedelete: mapping of source name -> list of destinations for files
deleted on one side and renamed on other.
commitinfo: dict containing data which should be used on commit
contains a filename -> info mapping
actionmapping: dict of action names as keys and values are dict of
filename as key and related data as values
"""
self._filemapping = {}
self._diverge = {}
self._renamedelete = {}
self._commitinfo = collections.defaultdict(dict)
self._actionmapping = collections.defaultdict(dict)
def updatevalues(self, diverge, renamedelete):
self._diverge = diverge
self._renamedelete = renamedelete
def addfile(self, filename, action, data, message):
"""adds a new file to the mergeresult object
filename: file which we are adding
action: one of mergestatemod.ACTION_*
data: a tuple of information like fctx and ctx related to this merge
message: a message about the merge
"""
# if the file already existed, we need to delete it's old
# entry form _actionmapping too
if filename in self._filemapping:
a, d, m = self._filemapping[filename]
del self._actionmapping[a][filename]
self._filemapping[filename] = (action, data, message)
self._actionmapping[action][filename] = (data, message)
def getfile(self, filename, default_return=None):
"""returns (action, args, msg) about this file
returns default_return if the file is not present"""
if filename in self._filemapping:
return self._filemapping[filename]
return default_return
def files(self, actions=None):
"""returns files on which provided action needs to perfromed
If actions is None, all files are returned
"""
# TODO: think whether we should return renamedelete and
# diverge filenames also
if actions is None:
for f in self._filemapping:
yield f
else:
for a in actions:
for f in self._actionmapping[a]:
yield f
def removefile(self, filename):
"""removes a file from the mergeresult object as the file might
not merging anymore"""
action, data, message = self._filemapping[filename]
del self._filemapping[filename]
del self._actionmapping[action][filename]
def getactions(self, actions, sort=False):
"""get list of files which are marked with these actions
if sort is true, files for each action is sorted and then added
Returns a list of tuple of form (filename, data, message)
"""
for a in actions:
if sort:
for f in sorted(self._actionmapping[a]):
args, msg = self._actionmapping[a][f]
yield f, args, msg
else:
for f, (args, msg) in self._actionmapping[a].items():
yield f, args, msg
def len(self, actions=None):
"""returns number of files which needs actions
if actions is passed, total of number of files in that action
only is returned"""
if actions is None:
return len(self._filemapping)
return sum(len(self._actionmapping[a]) for a in actions)
def filemap(self, sort=False):
if sorted:
for key, val in sorted(self._filemapping.items()):
yield key, val
else:
for key, val in self._filemapping.items():
yield key, val
def addcommitinfo(self, filename, key, value):
"""adds key-value information about filename which will be required
while committing this merge"""
self._commitinfo[filename][key] = value
@property
def diverge(self):
return self._diverge
@property
def renamedelete(self):
return self._renamedelete
@property
def commitinfo(self):
return self._commitinfo
@property
def actionsdict(self):
"""returns a dictionary of actions to be perfomed with action as key
and a list of files and related arguments as values"""
res = collections.defaultdict(list)
for a, d in self._actionmapping.items():
for f, (args, msg) in d.items():
res[a].append((f, args, msg))
return res
def setactions(self, actions):
self._filemapping = actions
self._actionmapping = collections.defaultdict(dict)
for f, (act, data, msg) in self._filemapping.items():
self._actionmapping[act][f] = data, msg
def hasconflicts(self):
"""tells whether this merge resulted in some actions which can
result in conflicts or not"""
for a in self._actionmapping.keys():
if (
a
not in (
mergestatemod.ACTION_GET,
mergestatemod.ACTION_EXEC,
mergestatemod.ACTION_REMOVE,
mergestatemod.ACTION_PATH_CONFLICT_RESOLVE,
)
and self._actionmapping[a]
and not a.no_op
):
return True
return False
def manifestmerge(
repo,
wctx,
p2,
pa,
branchmerge,
force,
matcher,
acceptremote,
followcopies,
forcefulldiff=False,
):
"""
Merge wctx and p2 with ancestor pa and generate merge action list
branchmerge and force are as passed in to update
matcher = matcher to filter file lists
acceptremote = accept the incoming changes without prompting
Returns an object of mergeresult class
"""
mresult = mergeresult()
if matcher is not None and matcher.always():
matcher = None
# manifests fetched in order are going to be faster, so prime the caches
[
x.manifest()
for x in sorted(wctx.parents() + [p2, pa], key=scmutil.intrev)
]
branch_copies1 = copies.branch_copies()
branch_copies2 = copies.branch_copies()
diverge = {}
# information from merge which is needed at commit time
# for example choosing filelog of which parent to commit
# TODO: use specific constants in future for this mapping
if followcopies:
branch_copies1, branch_copies2, diverge = copies.mergecopies(
repo, wctx, p2, pa
)
boolbm = pycompat.bytestr(bool(branchmerge))
boolf = pycompat.bytestr(bool(force))
boolm = pycompat.bytestr(bool(matcher))
repo.ui.note(_(b"resolving manifests\n"))
repo.ui.debug(
b" branchmerge: %s, force: %s, partial: %s\n" % (boolbm, boolf, boolm)
)
repo.ui.debug(b" ancestor: %s, local: %s, remote: %s\n" % (pa, wctx, p2))
m1, m2, ma = wctx.manifest(), p2.manifest(), pa.manifest()
copied1 = set(branch_copies1.copy.values())
copied1.update(branch_copies1.movewithdir.values())
copied2 = set(branch_copies2.copy.values())
copied2.update(branch_copies2.movewithdir.values())
if b'.hgsubstate' in m1 and wctx.rev() is None:
# Check whether sub state is modified, and overwrite the manifest
# to flag the change. If wctx is a committed revision, we shouldn't
# care for the dirty state of the working directory.
if any(wctx.sub(s).dirty() for s in wctx.substate):
m1[b'.hgsubstate'] = repo.nodeconstants.modifiednodeid
# Don't use m2-vs-ma optimization if:
# - ma is the same as m1 or m2, which we're just going to diff again later
# - The caller specifically asks for a full diff, which is useful during bid
# merge.
# - we are tracking salvaged files specifically hence should process all
# files
if (
pa not in ([wctx, p2] + wctx.parents())
and not forcefulldiff
and not (
repo.ui.configbool(b'experimental', b'merge-track-salvaged')
or repo.filecopiesmode == b'changeset-sidedata'
)
):
# Identify which files are relevant to the merge, so we can limit the
# total m1-vs-m2 diff to just those files. This has significant
# performance benefits in large repositories.
relevantfiles = set(ma.diff(m2).keys())
# For copied and moved files, we need to add the source file too.
for copykey, copyvalue in branch_copies1.copy.items():
if copyvalue in relevantfiles:
relevantfiles.add(copykey)
for movedirkey in branch_copies1.movewithdir:
relevantfiles.add(movedirkey)
filesmatcher = scmutil.matchfiles(repo, relevantfiles)
matcher = matchmod.intersectmatchers(matcher, filesmatcher)
diff = m1.diff(m2, match=matcher)
for f, ((n1, fl1), (n2, fl2)) in diff.items():
if n1 and n2: # file exists on both local and remote side
if f not in ma:
# TODO: what if they're renamed from different sources?
fa = branch_copies1.copy.get(
f, None
) or branch_copies2.copy.get(f, None)
args, msg = None, None
if fa is not None:
args = (f, f, fa, False, pa.node())
msg = b'both renamed from %s' % fa
else:
args = (f, f, None, False, pa.node())
msg = b'both created'
mresult.addfile(f, mergestatemod.ACTION_MERGE, args, msg)
elif f in branch_copies1.copy:
fa = branch_copies1.copy[f]
mresult.addfile(
f,
mergestatemod.ACTION_MERGE,
(f, fa, fa, False, pa.node()),
b'local replaced from %s' % fa,
)
elif f in branch_copies2.copy:
fa = branch_copies2.copy[f]
mresult.addfile(
f,
mergestatemod.ACTION_MERGE,
(fa, f, fa, False, pa.node()),
b'other replaced from %s' % fa,
)
else:
a = ma[f]
fla = ma.flags(f)
nol = b'l' not in fl1 + fl2 + fla
if n2 == a and fl2 == fla:
mresult.addfile(
f,
mergestatemod.ACTION_KEEP,
(),
b'remote unchanged',
)
elif n1 == a and fl1 == fla: # local unchanged - use remote
if n1 == n2: # optimization: keep local content
mresult.addfile(
f,
mergestatemod.ACTION_EXEC,
(fl2,),
b'update permissions',
)
else:
mresult.addfile(
f,
mergestatemod.ACTION_GET,
(fl2, False),
b'remote is newer',
)
if branchmerge:
mresult.addcommitinfo(
f, b'filenode-source', b'other'
)
elif nol and n2 == a: # remote only changed 'x'
mresult.addfile(
f,
mergestatemod.ACTION_EXEC,
(fl2,),
b'update permissions',
)
elif nol and n1 == a: # local only changed 'x'
mresult.addfile(
f,
mergestatemod.ACTION_GET,
(fl1, False),
b'remote is newer',
)
if branchmerge:
mresult.addcommitinfo(f, b'filenode-source', b'other')
else: # both changed something
mresult.addfile(
f,
mergestatemod.ACTION_MERGE,
(f, f, f, False, pa.node()),
b'versions differ',
)
elif n1: # file exists only on local side
if f in copied2:
pass # we'll deal with it on m2 side
elif (
f in branch_copies1.movewithdir
): # directory rename, move local
f2 = branch_copies1.movewithdir[f]
if f2 in m2:
mresult.addfile(
f2,
mergestatemod.ACTION_MERGE,
(f, f2, None, True, pa.node()),
b'remote directory rename, both created',
)
else:
mresult.addfile(
f2,
mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,
(f, fl1),
b'remote directory rename - move from %s' % f,
)
elif f in branch_copies1.copy:
f2 = branch_copies1.copy[f]
mresult.addfile(
f,
mergestatemod.ACTION_MERGE,
(f, f2, f2, False, pa.node()),
b'local copied/moved from %s' % f2,
)
elif f in ma: # clean, a different, no remote
if n1 != ma[f]:
if acceptremote:
mresult.addfile(
f,
mergestatemod.ACTION_REMOVE,
None,
b'remote delete',
)
else:
mresult.addfile(
f,
mergestatemod.ACTION_CHANGED_DELETED,
(f, None, f, False, pa.node()),
b'prompt changed/deleted',
)
if branchmerge:
mresult.addcommitinfo(
f, b'merge-removal-candidate', b'yes'
)
elif n1 == repo.nodeconstants.addednodeid:
# This file was locally added. We should forget it instead of
# deleting it.
mresult.addfile(
f,
mergestatemod.ACTION_FORGET,
None,
b'remote deleted',
)
else:
mresult.addfile(
f,
mergestatemod.ACTION_REMOVE,
None,
b'other deleted',
)
if branchmerge:
# the file must be absent after merging,
# howeber the user might make
# the file reappear using revert and if they does,
# we force create a new node
mresult.addcommitinfo(
f, b'merge-removal-candidate', b'yes'
)
else: # file not in ancestor, not in remote
mresult.addfile(
f,
mergestatemod.ACTION_KEEP_NEW,
None,
b'ancestor missing, remote missing',
)
elif n2: # file exists only on remote side
if f in copied1:
pass # we'll deal with it on m1 side
elif f in branch_copies2.movewithdir:
f2 = branch_copies2.movewithdir[f]
if f2 in m1:
mresult.addfile(
f2,
mergestatemod.ACTION_MERGE,
(f2, f, None, False, pa.node()),
b'local directory rename, both created',
)
else:
mresult.addfile(
f2,
mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
(f, fl2),
b'local directory rename - get from %s' % f,
)
elif f in branch_copies2.copy:
f2 = branch_copies2.copy[f]
msg, args = None, None
if f2 in m2:
args = (f2, f, f2, False, pa.node())
msg = b'remote copied from %s' % f2
else:
args = (f2, f, f2, True, pa.node())
msg = b'remote moved from %s' % f2
mresult.addfile(f, mergestatemod.ACTION_MERGE, args, msg)
elif f not in ma:
# local unknown, remote created: the logic is described by the
# following table:
#
# force branchmerge different | action
# n * * | create
# y n * | create
# y y n | create
# y y y | merge
#
# Checking whether the files are different is expensive, so we
# don't do that when we can avoid it.
if not force:
mresult.addfile(
f,
mergestatemod.ACTION_CREATED,
(fl2,),
b'remote created',
)
elif not branchmerge:
mresult.addfile(
f,
mergestatemod.ACTION_CREATED,
(fl2,),
b'remote created',
)
else:
mresult.addfile(
f,
mergestatemod.ACTION_CREATED_MERGE,
(fl2, pa.node()),
b'remote created, get or merge',
)
elif n2 != ma[f]:
df = None
for d in branch_copies1.dirmove:
if f.startswith(d):
# new file added in a directory that was moved
df = branch_copies1.dirmove[d] + f[len(d) :]
break
if df is not None and df in m1:
mresult.addfile(
df,
mergestatemod.ACTION_MERGE,
(df, f, f, False, pa.node()),
b'local directory rename - respect move '
b'from %s' % f,
)
elif acceptremote:
mresult.addfile(
f,
mergestatemod.ACTION_CREATED,
(fl2,),
b'remote recreating',
)
else:
mresult.addfile(
f,
mergestatemod.ACTION_DELETED_CHANGED,
(None, f, f, False, pa.node()),
b'prompt deleted/changed',
)
if branchmerge:
mresult.addcommitinfo(
f, b'merge-removal-candidate', b'yes'
)
else:
mresult.addfile(
f,
mergestatemod.ACTION_KEEP_ABSENT,
None,
b'local not present, remote unchanged',
)
if branchmerge:
# the file must be absent after merging
# however the user might make
# the file reappear using revert and if they does,
# we force create a new node
mresult.addcommitinfo(f, b'merge-removal-candidate', b'yes')
if repo.ui.configbool(b'experimental', b'merge.checkpathconflicts'):
# If we are merging, look for path conflicts.
checkpathconflicts(repo, wctx, p2, mresult)
narrowmatch = repo.narrowmatch()
if not narrowmatch.always():
# Updates "actions" in place
_filternarrowactions(narrowmatch, branchmerge, mresult)
renamedelete = branch_copies1.renamedelete
renamedelete.update(branch_copies2.renamedelete)
mresult.updatevalues(diverge, renamedelete)
return mresult
def _resolvetrivial(repo, wctx, mctx, ancestor, mresult):
"""Resolves false conflicts where the nodeid changed but the content
remained the same."""
# We force a copy of actions.items() because we're going to mutate
# actions as we resolve trivial conflicts.
for f in list(mresult.files((mergestatemod.ACTION_CHANGED_DELETED,))):
if f in ancestor and not wctx[f].cmp(ancestor[f]):
# local did change but ended up with same content
mresult.addfile(
f, mergestatemod.ACTION_REMOVE, None, b'prompt same'
)
for f in list(mresult.files((mergestatemod.ACTION_DELETED_CHANGED,))):
if f in ancestor and not mctx[f].cmp(ancestor[f]):
# remote did change but ended up with same content
mresult.removefile(f) # don't get = keep local deleted
def calculateupdates(
repo,
wctx,
mctx,
ancestors,
branchmerge,
force,
acceptremote,
followcopies,
matcher=None,
mergeforce=False,
):
"""
Calculate the actions needed to merge mctx into wctx using ancestors
Uses manifestmerge() to merge manifest and get list of actions required to
perform for merging two manifests. If there are multiple ancestors, uses bid
merge if enabled.
Also filters out actions which are unrequired if repository is sparse.
Returns mergeresult object same as manifestmerge().
"""
# Avoid cycle.
from . import sparse
mresult = None
if len(ancestors) == 1: # default
mresult = manifestmerge(
repo,
wctx,
mctx,
ancestors[0],
branchmerge,
force,
matcher,
acceptremote,
followcopies,
)
_checkunknownfiles(repo, wctx, mctx, force, mresult, mergeforce)
else: # only when merge.preferancestor=* - the default
repo.ui.note(
_(b"note: merging %s and %s using bids from ancestors %s\n")
% (
wctx,
mctx,
_(b' and ').join(pycompat.bytestr(anc) for anc in ancestors),
)
)
# mapping filename to bids (action method to list af actions)
# {FILENAME1 : BID1, FILENAME2 : BID2}
# BID is another dictionary which contains
# mapping of following form:
# {ACTION_X : [info, ..], ACTION_Y : [info, ..]}
fbids = {}
mresult = mergeresult()
diverge, renamedelete = None, None
for ancestor in ancestors:
repo.ui.note(_(b'\ncalculating bids for ancestor %s\n') % ancestor)
mresult1 = manifestmerge(
repo,
wctx,
mctx,
ancestor,
branchmerge,
force,
matcher,
acceptremote,
followcopies,
forcefulldiff=True,
)
_checkunknownfiles(repo, wctx, mctx, force, mresult1, mergeforce)
# Track the shortest set of warning on the theory that bid
# merge will correctly incorporate more information
if diverge is None or len(mresult1.diverge) < len(diverge):
diverge = mresult1.diverge
if renamedelete is None or len(renamedelete) < len(
mresult1.renamedelete
):
renamedelete = mresult1.renamedelete
# blindly update final mergeresult commitinfo with what we get
# from mergeresult object for each ancestor
# TODO: some commitinfo depends on what bid merge choose and hence
# we will need to make commitinfo also depend on bid merge logic
mresult._commitinfo.update(mresult1._commitinfo)
for f, a in mresult1.filemap(sort=True):
m, args, msg = a
repo.ui.debug(b' %s: %s -> %s\n' % (f, msg, m.__bytes__()))
if f in fbids:
d = fbids[f]
if m in d:
d[m].append(a)
else:
d[m] = [a]
else:
fbids[f] = {m: [a]}
# Call for bids
# Pick the best bid for each file
repo.ui.note(
_(b'\nauction for merging merge bids (%d ancestors)\n')
% len(ancestors)
)
for f, bids in sorted(fbids.items()):
if repo.ui.debugflag:
repo.ui.debug(b" list of bids for %s:\n" % f)
for m, l in sorted(bids.items()):
for _f, args, msg in l:
repo.ui.debug(b' %s -> %s\n' % (msg, m.__bytes__()))
# bids is a mapping from action method to list af actions
# Consensus?
if len(bids) == 1: # all bids are the same kind of method
m, l = list(bids.items())[0]
if all(a == l[0] for a in l[1:]): # len(bids) is > 1
repo.ui.note(
_(b" %s: consensus for %s\n") % (f, m.__bytes__())
)
mresult.addfile(f, *l[0])
continue
# If keep is an option, just do it.
if mergestatemod.ACTION_KEEP in bids:
repo.ui.note(_(b" %s: picking 'keep' action\n") % f)
mresult.addfile(f, *bids[mergestatemod.ACTION_KEEP][0])
continue
# If keep absent is an option, just do that
if mergestatemod.ACTION_KEEP_ABSENT in bids:
repo.ui.note(_(b" %s: picking 'keep absent' action\n") % f)
mresult.addfile(f, *bids[mergestatemod.ACTION_KEEP_ABSENT][0])
continue
# ACTION_KEEP_NEW and ACTION_CHANGED_DELETED are conflicting actions
# as one say that file is new while other says that file was present
# earlier too and has a change delete conflict
# Let's fall back to conflicting ACTION_CHANGED_DELETED and let user
# do the right thing
if (
mergestatemod.ACTION_CHANGED_DELETED in bids
and mergestatemod.ACTION_KEEP_NEW in bids
):
repo.ui.note(_(b" %s: picking 'changed/deleted' action\n") % f)
mresult.addfile(
f, *bids[mergestatemod.ACTION_CHANGED_DELETED][0]
)
continue
# If keep new is an option, let's just do that
if mergestatemod.ACTION_KEEP_NEW in bids:
repo.ui.note(_(b" %s: picking 'keep new' action\n") % f)
mresult.addfile(f, *bids[mergestatemod.ACTION_KEEP_NEW][0])
continue
# ACTION_GET and ACTION_DELETE_CHANGED are conflicting actions as
# one action states the file is newer/created on remote side and
# other states that file is deleted locally and changed on remote
# side. Let's fallback and rely on a conflicting action to let user
# do the right thing
if (
mergestatemod.ACTION_DELETED_CHANGED in bids
and mergestatemod.ACTION_GET in bids
):
repo.ui.note(_(b" %s: picking 'delete/changed' action\n") % f)
mresult.addfile(
f, *bids[mergestatemod.ACTION_DELETED_CHANGED][0]
)
continue
# If there are gets and they all agree [how could they not?], do it.
if mergestatemod.ACTION_GET in bids:
ga0 = bids[mergestatemod.ACTION_GET][0]
if all(a == ga0 for a in bids[mergestatemod.ACTION_GET][1:]):
repo.ui.note(_(b" %s: picking 'get' action\n") % f)
mresult.addfile(f, *ga0)
continue
# TODO: Consider other simple actions such as mode changes
# Handle inefficient democrazy.
repo.ui.note(_(b' %s: multiple bids for merge action:\n') % f)
for m, l in sorted(bids.items()):
for _f, args, msg in l:
repo.ui.note(b' %s -> %s\n' % (msg, m.__bytes__()))
# Pick random action. TODO: Instead, prompt user when resolving
m, l = list(bids.items())[0]
repo.ui.warn(
_(b' %s: ambiguous merge - picked %s action\n')
% (f, m.__bytes__())
)
mresult.addfile(f, *l[0])
continue
repo.ui.note(_(b'end of auction\n\n'))
mresult.updatevalues(diverge, renamedelete)
if wctx.rev() is None:
_forgetremoved(wctx, mctx, branchmerge, mresult)
sparse.filterupdatesactions(repo, wctx, mctx, branchmerge, mresult)
_resolvetrivial(repo, wctx, mctx, ancestors[0], mresult)
return mresult
def _getcwd():
try:
return encoding.getcwd()
except FileNotFoundError:
return None
def batchremove(repo, wctx, actions):
"""apply removes to the working directory
yields tuples for progress updates
"""
verbose = repo.ui.verbose
cwd = _getcwd()
i = 0
for f, args, msg in actions:
repo.ui.debug(b" %s: %s -> r\n" % (f, msg))
if verbose:
repo.ui.note(_(b"removing %s\n") % f)
wctx[f].audit()
try:
wctx[f].remove(ignoremissing=True)
except OSError as inst:
repo.ui.warn(
_(b"update failed to remove %s: %s!\n")
% (f, stringutil.forcebytestr(inst.strerror))
)
if i == 100:
yield i, f
i = 0
i += 1
if i > 0:
yield i, f
if cwd and not _getcwd():
# cwd was removed in the course of removing files; print a helpful
# warning.
repo.ui.warn(
_(
b"current directory was removed\n"
b"(consider changing to repo root: %s)\n"
)
% repo.root
)
def batchget(repo, mctx, wctx, wantfiledata, actions):
"""apply gets to the working directory
mctx is the context to get from
Yields arbitrarily many (False, tuple) for progress updates, followed by
exactly one (True, filedata). When wantfiledata is false, filedata is an
empty dict. When wantfiledata is true, filedata[f] is a triple (mode, size,
mtime) of the file f written for each action.
"""
filedata = {}
verbose = repo.ui.verbose
fctx = mctx.filectx
ui = repo.ui
i = 0
with repo.wvfs.backgroundclosing(ui, expectedcount=len(actions)):
for f, (flags, backup), msg in actions:
repo.ui.debug(b" %s: %s -> g\n" % (f, msg))
if verbose:
repo.ui.note(_(b"getting %s\n") % f)
if backup:
# If a file or directory exists with the same name, back that
# up. Otherwise, look to see if there is a file that conflicts
# with a directory this file is in, and if so, back that up.
conflicting = f
if not repo.wvfs.lexists(f):
for p in pathutil.finddirs(f):
if repo.wvfs.isfileorlink(p):
conflicting = p
break
if repo.wvfs.lexists(conflicting):
orig = scmutil.backuppath(ui, repo, conflicting)
util.rename(repo.wjoin(conflicting), orig)
wfctx = wctx[f]
wfctx.clearunknown()
atomictemp = ui.configbool(b"experimental", b"update.atomic-file")
size = wfctx.write(
fctx(f).data(),
flags,
backgroundclose=True,
atomictemp=atomictemp,
)
if wantfiledata:
# XXX note that there is a race window between the time we
# write the clean data into the file and we stats it. So another
# writing process meddling with the file content right after we
# wrote it could cause bad stat data to be gathered.
#
# They are 2 data we gather here
# - the mode:
# That we actually just wrote, we should not need to read
# it from disk, (except not all mode might have survived
# the disk round-trip, which is another issue: we should
# not depends on this)
# - the mtime,
# On system that support nanosecond precision, the mtime
# could be accurate enough to tell the two writes appart.
# However gathering it in a racy way make the mtime we
# gather "unreliable".
#
# (note: we get the size from the data we write, which is sane)
#
# So in theory the data returned here are fully racy, but in
# practice "it works mostly fine".
#
# Do not be surprised if you end up reading this while looking
# for the causes of some buggy status. Feel free to improve
# this in the future, but we cannot simply stop gathering
# information. Otherwise `hg status` call made after a large `hg
# update` runs would have to redo a similar amount of work to
# restore and compare all files content.
s = wfctx.lstat()
mode = s.st_mode
mtime = timestamp.mtime_of(s)
# for dirstate.update_file's parentfiledata argument:
filedata[f] = (mode, size, mtime)
if i == 100:
yield False, (i, f)
i = 0
i += 1
if i > 0:
yield False, (i, f)
yield True, filedata
def _prefetchfiles(repo, ctx, mresult):
"""Invoke ``scmutil.prefetchfiles()`` for the files relevant to the dict
of merge actions. ``ctx`` is the context being merged in."""
# Skipping 'a', 'am', 'f', 'r', 'dm', 'e', 'k', 'p' and 'pr', because they
# don't touch the context to be merged in. 'cd' is skipped, because
# changed/deleted never resolves to something from the remote side.
files = mresult.files(
[
mergestatemod.ACTION_GET,
mergestatemod.ACTION_DELETED_CHANGED,
mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
mergestatemod.ACTION_MERGE,
]
)
prefetch = scmutil.prefetchfiles
matchfiles = scmutil.matchfiles
prefetch(
repo,
[
(
ctx.rev(),
matchfiles(repo, files),
)
],
)
@attr.s(frozen=True)
class updateresult:
updatedcount = attr.ib()
mergedcount = attr.ib()
removedcount = attr.ib()
unresolvedcount = attr.ib()
def isempty(self):
return not (
self.updatedcount
or self.mergedcount
or self.removedcount
or self.unresolvedcount
)
def applyupdates(
repo,
mresult,
wctx,
mctx,
overwrite,
wantfiledata,
labels=None,
):
"""apply the merge action list to the working directory
mresult is a mergeresult object representing result of the merge
wctx is the working copy context
mctx is the context to be merged into the working copy
Return a tuple of (counts, filedata), where counts is a tuple
(updated, merged, removed, unresolved) that describes how many
files were affected by the update, and filedata is as described in
batchget.
"""
_prefetchfiles(repo, mctx, mresult)
updated, merged, removed = 0, 0, 0
ms = wctx.mergestate(clean=True)
ms.start(wctx.p1().node(), mctx.node(), labels)
for f, op in mresult.commitinfo.items():
# the other side of filenode was choosen while merging, store this in
# mergestate so that it can be reused on commit
ms.addcommitinfo(f, op)
num_no_op = mresult.len(mergestatemod.MergeAction.NO_OP_ACTIONS)
numupdates = mresult.len() - num_no_op
progress = repo.ui.makeprogress(
_(b'updating'), unit=_(b'files'), total=numupdates
)
if b'.hgsubstate' in mresult._actionmapping[mergestatemod.ACTION_REMOVE]:
subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)
# record path conflicts
for f, args, msg in mresult.getactions(
[mergestatemod.ACTION_PATH_CONFLICT], sort=True
):
f1, fo = args
s = repo.ui.status
s(
_(
b"%s: path conflict - a file or link has the same name as a "
b"directory\n"
)
% f
)
if fo == b'l':
s(_(b"the local file has been renamed to %s\n") % f1)
else:
s(_(b"the remote file has been renamed to %s\n") % f1)
s(_(b"resolve manually then use 'hg resolve --mark %s'\n") % f)
ms.addpathconflict(f, f1, fo)
progress.increment(item=f)
# When merging in-memory, we can't support worker processes, so set the
# per-item cost at 0 in that case.
cost = 0 if wctx.isinmemory() else 0.001
# remove in parallel (must come before resolving path conflicts and getting)
prog = worker.worker(
repo.ui,
cost,
batchremove,
(repo, wctx),
list(mresult.getactions([mergestatemod.ACTION_REMOVE], sort=True)),
)
for i, item in prog:
progress.increment(step=i, item=item)
removed = mresult.len((mergestatemod.ACTION_REMOVE,))
# resolve path conflicts (must come before getting)
for f, args, msg in mresult.getactions(
[mergestatemod.ACTION_PATH_CONFLICT_RESOLVE], sort=True
):
repo.ui.debug(b" %s: %s -> pr\n" % (f, msg))
(f0, origf0) = args
if wctx[f0].lexists():
repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
wctx[f].audit()
wctx[f].write(wctx.filectx(f0).data(), wctx.filectx(f0).flags())
wctx[f0].remove()
progress.increment(item=f)
# get in parallel.
threadsafe = repo.ui.configbool(
b'experimental', b'worker.wdir-get-thread-safe'
)
prog = worker.worker(
repo.ui,
cost,
batchget,
(repo, mctx, wctx, wantfiledata),
list(mresult.getactions([mergestatemod.ACTION_GET], sort=True)),
threadsafe=threadsafe,
hasretval=True,
)
getfiledata = {}
for final, res in prog:
if final:
getfiledata = res
else:
i, item = res
progress.increment(step=i, item=item)
if b'.hgsubstate' in mresult._actionmapping[mergestatemod.ACTION_GET]:
subrepoutil.submerge(repo, wctx, mctx, wctx, overwrite, labels)
# forget (manifest only, just log it) (must come first)
for f, args, msg in mresult.getactions(
(mergestatemod.ACTION_FORGET,), sort=True
):
repo.ui.debug(b" %s: %s -> f\n" % (f, msg))
progress.increment(item=f)
# re-add (manifest only, just log it)
for f, args, msg in mresult.getactions(
(mergestatemod.ACTION_ADD,), sort=True
):
repo.ui.debug(b" %s: %s -> a\n" % (f, msg))
progress.increment(item=f)
# re-add/mark as modified (manifest only, just log it)
for f, args, msg in mresult.getactions(
(mergestatemod.ACTION_ADD_MODIFIED,), sort=True
):
repo.ui.debug(b" %s: %s -> am\n" % (f, msg))
progress.increment(item=f)
# keep (noop, just log it)
for a in mergestatemod.MergeAction.NO_OP_ACTIONS:
for f, args, msg in mresult.getactions((a,), sort=True):
repo.ui.debug(b" %s: %s -> %s\n" % (f, msg, a.__bytes__()))
# no progress
# directory rename, move local
for f, args, msg in mresult.getactions(
(mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,), sort=True
):
repo.ui.debug(b" %s: %s -> dm\n" % (f, msg))
progress.increment(item=f)
f0, flags = args
repo.ui.note(_(b"moving %s to %s\n") % (f0, f))
wctx[f].audit()
wctx[f].write(wctx.filectx(f0).data(), flags)
wctx[f0].remove()
# local directory rename, get
for f, args, msg in mresult.getactions(
(mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,), sort=True
):
repo.ui.debug(b" %s: %s -> dg\n" % (f, msg))
progress.increment(item=f)
f0, flags = args
repo.ui.note(_(b"getting %s to %s\n") % (f0, f))
wctx[f].write(mctx.filectx(f0).data(), flags)
# exec
for f, args, msg in mresult.getactions(
(mergestatemod.ACTION_EXEC,), sort=True
):
repo.ui.debug(b" %s: %s -> e\n" % (f, msg))
progress.increment(item=f)
(flags,) = args
wctx[f].audit()
wctx[f].setflags(b'l' in flags, b'x' in flags)
moves = []
# 'cd' and 'dc' actions are treated like other merge conflicts
mergeactions = list(
mresult.getactions(
[
mergestatemod.ACTION_CHANGED_DELETED,
mergestatemod.ACTION_DELETED_CHANGED,
mergestatemod.ACTION_MERGE,
],
sort=True,
)
)
for f, args, msg in mergeactions:
f1, f2, fa, move, anc = args
if f == b'.hgsubstate': # merged internally
continue
if f1 is None:
fcl = filemerge.absentfilectx(wctx, fa)
else:
repo.ui.debug(b" preserving %s for resolve of %s\n" % (f1, f))
fcl = wctx[f1]
if f2 is None:
fco = filemerge.absentfilectx(mctx, fa)
else:
fco = mctx[f2]
actx = repo[anc]
if fa in actx:
fca = actx[fa]
else:
# TODO: move to absentfilectx
fca = repo.filectx(f1, fileid=nullrev)
ms.add(fcl, fco, fca, f)
if f1 != f and move:
moves.append(f1)
# remove renamed files after safely stored
for f in moves:
if wctx[f].lexists():
repo.ui.debug(b"removing %s\n" % f)
wctx[f].audit()
wctx[f].remove()
# these actions updates the file
updated = mresult.len(
(
mergestatemod.ACTION_GET,
mergestatemod.ACTION_EXEC,
mergestatemod.ACTION_LOCAL_DIR_RENAME_GET,
mergestatemod.ACTION_DIR_RENAME_MOVE_LOCAL,
)
)
try:
for f, args, msg in mergeactions:
repo.ui.debug(b" %s: %s -> m\n" % (f, msg))
ms.addcommitinfo(f, {b'merged': b'yes'})
progress.increment(item=f)
if f == b'.hgsubstate': # subrepo states need updating
subrepoutil.submerge(
repo, wctx, mctx, wctx.ancestor(mctx), overwrite, labels
)
continue
wctx[f].audit()
ms.resolve(f, wctx)
except error.InterventionRequired:
# If the user has merge.on-failure=halt, catch the error and close the
# merge state "properly".
pass
finally:
ms.commit()
unresolved = ms.unresolvedcount()
msupdated, msmerged, msremoved = ms.counts()
updated += msupdated
merged += msmerged
removed += msremoved
extraactions = ms.actions()
progress.complete()
return (
updateresult(updated, merged, removed, unresolved),
getfiledata,
extraactions,
)
def _advertisefsmonitor(repo, num_gets, p1node):
# Advertise fsmonitor when its presence could be useful.
#
# We only advertise when performing an update from an empty working
# directory. This typically only occurs during initial clone.
#
# We give users a mechanism to disable the warning in case it is
# annoying.
#
# We only allow on Linux and MacOS because that's where fsmonitor is
# considered stable.
fsmonitorwarning = repo.ui.configbool(b'fsmonitor', b'warn_when_unused')
fsmonitorthreshold = repo.ui.configint(
b'fsmonitor', b'warn_update_file_count'
)
# avoid cycle dirstate -> sparse -> merge -> dirstate
dirstate_rustmod = policy.importrust("dirstate")
if dirstate_rustmod is not None:
# When using rust status, fsmonitor becomes necessary at higher sizes
fsmonitorthreshold = repo.ui.configint(
b'fsmonitor',
b'warn_update_file_count_rust',
)
try:
# avoid cycle: extensions -> cmdutil -> merge
from . import extensions
extensions.find(b'fsmonitor')
fsmonitorenabled = repo.ui.config(b'fsmonitor', b'mode') != b'off'
# We intentionally don't look at whether fsmonitor has disabled
# itself because a) fsmonitor may have already printed a warning
# b) we only care about the config state here.
except KeyError:
fsmonitorenabled = False
if (
fsmonitorwarning
and not fsmonitorenabled
and p1node == repo.nullid
and num_gets >= fsmonitorthreshold
and pycompat.sysplatform.startswith((b'linux', b'darwin'))
):
repo.ui.warn(
_(
b'(warning: large working directory being used without '
b'fsmonitor enabled; enable fsmonitor to improve performance; '
b'see "hg help -e fsmonitor")\n'
)
)
UPDATECHECK_ABORT = b'abort' # handled at higher layers
UPDATECHECK_NONE = b'none'
UPDATECHECK_LINEAR = b'linear'
UPDATECHECK_NO_CONFLICT = b'noconflict'
def _update(
repo,
node,
branchmerge,
force,
ancestor=None,
mergeancestor=False,
labels=None,
matcher=None,
mergeforce=False,
updatedirstate=True,
updatecheck=None,
wc=None,
):
"""
Perform a merge between the working directory and the given node
node = the node to update to
branchmerge = whether to merge between branches
force = whether to force branch merging or file overwriting
matcher = a matcher to filter file lists (dirstate not updated)
mergeancestor = whether it is merging with an ancestor. If true,
we should accept the incoming changes for any prompts that occur.
If false, merging with an ancestor (fast-forward) is only allowed
between different named branches. This flag is used by rebase extension
as a temporary fix and should be avoided in general.
labels = labels to use for local, other, and base
mergeforce = whether the merge was run with 'merge --force' (deprecated): if
this is True, then 'force' should be True as well.
The table below shows all the behaviors of the update command given the
-c/--check and -C/--clean or no options, whether the working directory is
dirty, whether a revision is specified, and the relationship of the parent
rev to the target rev (linear or not). Match from top first. The -n
option doesn't exist on the command line, but represents the
experimental.updatecheck=noconflict option.
This logic is tested by test-update-branches.t.
-c -C -n -m dirty rev linear | result
y y * * * * * | (1)
y * y * * * * | (1)
y * * y * * * | (1)
* y y * * * * | (1)
* y * y * * * | (1)
* * y y * * * | (1)
* * * * * n n | x
* * * * n * * | ok
n n n n y * y | merge
n n n n y y n | (2)
n n n y y * * | merge
n n y n y * * | merge if no conflict
n y n n y * * | discard
y n n n y * * | (3)
x = can't happen
* = don't-care
1 = incompatible options (checked in commands.py)
2 = abort: uncommitted changes (commit or update --clean to discard changes)
3 = abort: uncommitted changes (checked in commands.py)
The merge is performed inside ``wc``, a workingctx-like objects. It defaults
to repo[None] if None is passed.
Return the same tuple as applyupdates().
"""
# Avoid cycle.
from . import sparse
# This function used to find the default destination if node was None, but
# that's now in destutil.py.
assert node is not None
if not branchmerge and not force:
# TODO: remove the default once all callers that pass branchmerge=False
# and force=False pass a value for updatecheck. We may want to allow
# updatecheck='abort' to better suppport some of these callers.
if updatecheck is None:
updatecheck = UPDATECHECK_LINEAR
okay = (UPDATECHECK_NONE, UPDATECHECK_LINEAR, UPDATECHECK_NO_CONFLICT)
if updatecheck not in okay:
msg = r'Invalid updatecheck %r (can accept %r)'
msg %= (updatecheck, okay)
raise ValueError(msg)
if wc is not None and wc.isinmemory():
maybe_wlock = util.nullcontextmanager()
else:
maybe_wlock = repo.wlock()
with maybe_wlock:
if wc is None:
wc = repo[None]
pl = wc.parents()
p1 = pl[0]
p2 = repo[node]
if ancestor is not None:
pas = [repo[ancestor]]
else:
if repo.ui.configlist(b'merge', b'preferancestor') == [b'*']:
cahs = repo.changelog.commonancestorsheads(p1.node(), p2.node())
pas = [repo[anc] for anc in (sorted(cahs) or [repo.nullid])]
else:
pas = [p1.ancestor(p2, warn=branchmerge)]
fp1, fp2, xp1, xp2 = p1.node(), p2.node(), bytes(p1), bytes(p2)
overwrite = force and not branchmerge
### check phase
if not overwrite:
if len(pl) > 1:
raise error.StateError(_(b"outstanding uncommitted merge"))
ms = wc.mergestate()
if ms.unresolvedcount():
msg = _(b"outstanding merge conflicts")
hint = _(b"use 'hg resolve' to resolve")
raise error.StateError(msg, hint=hint)
if branchmerge:
m_a = _(b"merging with a working directory ancestor has no effect")
if pas == [p2]:
raise error.Abort(m_a)
elif pas == [p1]:
if not mergeancestor and wc.branch() == p2.branch():
msg = _(b"nothing to merge")
hint = _(b"use 'hg update' or check 'hg heads'")
raise error.Abort(msg, hint=hint)
if not force and (wc.files() or wc.deleted()):
msg = _(b"uncommitted changes")
hint = _(b"use 'hg status' to list changes")
raise error.StateError(msg, hint=hint)
if not wc.isinmemory():
for s in sorted(wc.substate):
wc.sub(s).bailifchanged()
elif not overwrite:
if p1 == p2: # no-op update
# call the hooks and exit early
repo.hook(b'preupdate', throw=True, parent1=xp2, parent2=b'')
repo.hook(b'update', parent1=xp2, parent2=b'', error=0)
return updateresult(0, 0, 0, 0)
if updatecheck == UPDATECHECK_LINEAR and pas not in (
[p1],
[p2],
): # nonlinear
dirty = wc.dirty(missing=True)
if dirty:
# Branching is a bit strange to ensure we do the minimal
# amount of call to obsutil.foreground.
foreground = obsutil.foreground(repo, [p1.node()])
# note: the <node> variable contains a random identifier
if repo[node].node() in foreground:
pass # allow updating to successors
else:
msg = _(b"uncommitted changes")
hint = _(b"commit or update --clean to discard changes")
raise error.UpdateAbort(msg, hint=hint)
else:
# Allow jumping branches if clean and specific rev given
pass
if overwrite:
pas = [wc]
elif not branchmerge:
pas = [p1]
# deprecated config: merge.followcopies
followcopies = repo.ui.configbool(b'merge', b'followcopies')
if overwrite:
followcopies = False
elif not pas[0]:
followcopies = False
if not branchmerge and not wc.dirty(missing=True):
followcopies = False
### calculate phase
mresult = calculateupdates(
repo,
wc,
p2,
pas,
branchmerge,
force,
mergeancestor,
followcopies,
matcher=matcher,
mergeforce=mergeforce,
)
if updatecheck == UPDATECHECK_NO_CONFLICT:
if mresult.hasconflicts():
msg = _(b"conflicting changes")
hint = _(b"commit or update --clean to discard changes")
raise error.StateError(msg, hint=hint)
# Prompt and create actions. Most of this is in the resolve phase
# already, but we can't handle .hgsubstate in filemerge or
# subrepoutil.submerge yet so we have to keep prompting for it.
vals = mresult.getfile(b'.hgsubstate')
if vals:
f = b'.hgsubstate'
m, args, msg = vals
prompts = filemerge.partextras(labels)
prompts[b'f'] = f
if m == mergestatemod.ACTION_CHANGED_DELETED:
if repo.ui.promptchoice(
_(
b"local%(l)s changed %(f)s which other%(o)s deleted\n"
b"use (c)hanged version or (d)elete?"
b"$$ &Changed $$ &Delete"
)
% prompts,
0,
):
mresult.addfile(
f,
mergestatemod.ACTION_REMOVE,
None,
b'prompt delete',
)
elif f in p1:
mresult.addfile(
f,
mergestatemod.ACTION_ADD_MODIFIED,
None,
b'prompt keep',
)
else:
mresult.addfile(
f,
mergestatemod.ACTION_ADD,
None,
b'prompt keep',
)
elif m == mergestatemod.ACTION_DELETED_CHANGED:
f1, f2, fa, move, anc = args
flags = p2[f2].flags()
if (
repo.ui.promptchoice(
_(
b"other%(o)s changed %(f)s which local%(l)s deleted\n"
b"use (c)hanged version or leave (d)eleted?"
b"$$ &Changed $$ &Deleted"
)
% prompts,
0,
)
== 0
):
mresult.addfile(
f,
mergestatemod.ACTION_GET,
(flags, False),
b'prompt recreating',
)
else:
mresult.removefile(f)
if not util.fscasesensitive(repo.path):
# check collision between files only in p2 for clean update
if not branchmerge and (
force or not wc.dirty(missing=True, branch=False)
):
_checkcollision(repo, p2.manifest(), None)
else:
_checkcollision(repo, wc.manifest(), mresult)
# divergent renames
for f, fl in sorted(mresult.diverge.items()):
repo.ui.warn(
_(
b"note: possible conflict - %s was renamed "
b"multiple times to:\n"
)
% f
)
for nf in sorted(fl):
repo.ui.warn(b" %s\n" % nf)
# rename and delete
for f, fl in sorted(mresult.renamedelete.items()):
repo.ui.warn(
_(
b"note: possible conflict - %s was deleted "
b"and renamed to:\n"
)
% f
)
for nf in sorted(fl):
repo.ui.warn(b" %s\n" % nf)
### apply phase
if not branchmerge: # just jump to the new rev
fp1, fp2, xp1, xp2 = fp2, repo.nullid, xp2, b''
# If we're doing a partial update, we need to skip updating
# the dirstate.
always = matcher is None or matcher.always()
updatedirstate = updatedirstate and always and not wc.isinmemory()
if updatedirstate:
repo.hook(b'preupdate', throw=True, parent1=xp1, parent2=xp2)
# note that we're in the middle of an update
repo.vfs.write(b'updatestate', p2.hex())
_advertisefsmonitor(
repo, mresult.len((mergestatemod.ACTION_GET,)), p1.node()
)
wantfiledata = updatedirstate and not branchmerge
stats, getfiledata, extraactions = applyupdates(
repo,
mresult,
wc,
p2,
overwrite,
wantfiledata,
labels=labels,
)
if updatedirstate:
if extraactions:
for k, acts in extraactions.items():
for a in acts:
mresult.addfile(a[0], k, *a[1:])
if k == mergestatemod.ACTION_GET and wantfiledata:
# no filedata until mergestate is updated to provide it
for a in acts:
getfiledata[a[0]] = None
assert len(getfiledata) == (
mresult.len((mergestatemod.ACTION_GET,)) if wantfiledata else 0
)
with repo.dirstate.parentchange():
### Filter Filedata
#
# We gathered "cache" information for the clean file while
# updating them: mtime, size and mode.
#
# At the time this comment is written, they are various issues
# with how we gather the `mode` and `mtime` information (see
# the comment in `batchget`).
#
# We are going to smooth one of this issue here : mtime ambiguity.
#
# i.e. even if the mtime gathered during `batchget` was
# correct[1] a change happening right after it could change the
# content while keeping the same mtime[2].
#
# When we reach the current code, the "on disk" part of the
# update operation is finished. We still assume that no other
# process raced that "on disk" part, but we want to at least
# prevent later file change to alter the content of the file
# right after the update operation. So quickly that the same
# mtime is record for the operation.
# To prevent such ambiguity to happens, we will only keep the
# "file data" for files with mtime that are stricly in the past,
# i.e. whose mtime is strictly lower than the current time.
#
# This protect us from race conditions from operation that could
# run right after this one, especially other Mercurial
# operation that could be waiting for the wlock to touch files
# content and the dirstate.
#
# In an ideal world, we could only get reliable information in
# `getfiledata` (from `getbatch`), however the current approach
# have been a successful compromise since many years.
#
# At the time this comment is written, not using any "cache"
# file data at all here would not be viable. As it would result is
# a very large amount of work (equivalent to the previous `hg
# update` during the next status after an update).
#
# [1] the current code cannot grantee that the `mtime` and
# `mode` are correct, but the result is "okay in practice".
# (see the comment in `batchget`). #
#
# [2] using nano-second precision can greatly help here because
# it makes the "different write with same mtime" issue
# virtually vanish. However, dirstate v1 cannot store such
# precision and a bunch of python-runtime, operating-system and
# filesystem does not provide use with such precision, so we
# have to operate as if it wasn't available.
if getfiledata:
ambiguous_mtime = {}
now = timestamp.get_fs_now(repo.vfs)
if now is None:
# we can't write to the FS, so we won't actually update
# the dirstate content anyway, no need to put cache
# information.
getfiledata = None
else:
now_sec = now[0]
for f, m in getfiledata.items():
if m is not None and m[2][0] >= now_sec:
ambiguous_mtime[f] = (m[0], m[1], None)
for f, m in ambiguous_mtime.items():
getfiledata[f] = m
repo.setparents(fp1, fp2)
mergestatemod.recordupdates(
repo, mresult.actionsdict, branchmerge, getfiledata
)
# update completed, clear state
util.unlink(repo.vfs.join(b'updatestate'))
if not branchmerge:
repo.dirstate.setbranch(p2.branch())
# If we're updating to a location, clean up any stale temporary includes
# (ex: this happens during hg rebase --abort).
if not branchmerge:
sparse.prunetemporaryincludes(repo)
if updatedirstate:
repo.hook(
b'update', parent1=xp1, parent2=xp2, error=stats.unresolvedcount
)
return stats
def merge(ctx, labels=None, force=False, wc=None):
"""Merge another topological branch into the working copy.
force = whether the merge was run with 'merge --force' (deprecated)
"""
return _update(
ctx.repo(),
ctx.rev(),
labels=labels,
branchmerge=True,
force=force,
mergeforce=force,
wc=wc,
)
def update(ctx, updatecheck=None, wc=None):
"""Do a regular update to the given commit, aborting if there are conflicts.
The 'updatecheck' argument can be used to control what to do in case of
conflicts.
Note: This is a new, higher-level update() than the one that used to exist
in this module. That function is now called _update(). You can hopefully
replace your callers to use this new update(), or clean_update(), merge(),
revert_to(), or graft().
"""
return _update(
ctx.repo(),
ctx.rev(),
branchmerge=False,
force=False,
labels=[b'working copy', b'destination', b'working copy parent'],
updatecheck=updatecheck,
wc=wc,
)
def clean_update(ctx, wc=None):
"""Do a clean update to the given commit.
This involves updating to the commit and discarding any changes in the
working copy.
"""
return _update(ctx.repo(), ctx.rev(), branchmerge=False, force=True, wc=wc)
def revert_to(ctx, matcher=None, wc=None):
"""Revert the working copy to the given commit.
The working copy will keep its current parent(s) but its content will
be the same as in the given commit.
"""
return _update(
ctx.repo(),
ctx.rev(),
branchmerge=False,
force=True,
updatedirstate=False,
matcher=matcher,
wc=wc,
)
def graft(
repo,
ctx,
base=None,
labels=None,
keepparent=False,
keepconflictparent=False,
wctx=None,
):
"""Do a graft-like merge.
This is a merge where the merge ancestor is chosen such that one
or more changesets are grafted onto the current changeset. In
addition to the merge, this fixes up the dirstate to include only
a single parent (if keepparent is False) and tries to duplicate any
renames/copies appropriately.
ctx - changeset to rebase
base - merge base, or ctx.p1() if not specified
labels - merge labels eg ['local', 'graft']
keepparent - keep second parent if any
keepconflictparent - if unresolved, keep parent used for the merge
"""
# If we're grafting a descendant onto an ancestor, be sure to pass
# mergeancestor=True to update. This does two things: 1) allows the merge if
# the destination is the same as the parent of the ctx (so we can use graft
# to copy commits), and 2) informs update that the incoming changes are
# newer than the destination so it doesn't prompt about "remote changed foo
# which local deleted".
# We also pass mergeancestor=True when base is the same revision as p1. 2)
# doesn't matter as there can't possibly be conflicts, but 1) is necessary.
wctx = wctx or repo[None]
pctx = wctx.p1()
base = base or ctx.p1()
mergeancestor = (
repo.changelog.isancestor(pctx.node(), ctx.node())
or pctx.rev() == base.rev()
)
stats = _update(
repo,
ctx.node(),
True,
True,
base.node(),
mergeancestor=mergeancestor,
labels=labels,
wc=wctx,
)
if keepconflictparent and stats.unresolvedcount:
pother = ctx.node()
else:
pother = repo.nullid
parents = ctx.parents()
if keepparent and len(parents) == 2 and base in parents:
parents.remove(base)
pother = parents[0].node()
# Never set both parents equal to each other
if pother == pctx.node():
pother = repo.nullid
if wctx.isinmemory():
wctx.setparents(pctx.node(), pother)
# fix up dirstate for copies and renames
copies.graftcopies(wctx, ctx, base)
else:
with repo.dirstate.parentchange():
repo.setparents(pctx.node(), pother)
repo.dirstate.write(repo.currenttransaction())
# fix up dirstate for copies and renames
copies.graftcopies(wctx, ctx, base)
return stats
def back_out(ctx, parent=None, wc=None):
if parent is None:
if ctx.p2() is not None:
msg = b"must specify parent of merge commit to back out"
raise error.ProgrammingError(msg)
parent = ctx.p1()
return _update(
ctx.repo(),
parent,
branchmerge=True,
force=True,
ancestor=ctx.node(),
mergeancestor=False,
)
def purge(
repo,
matcher,
unknown=True,
ignored=False,
removeemptydirs=True,
removefiles=True,
abortonerror=False,
noop=False,
confirm=False,
):
"""Purge the working directory of untracked files.
``matcher`` is a matcher configured to scan the working directory -
potentially a subset.
``unknown`` controls whether unknown files should be purged.
``ignored`` controls whether ignored files should be purged.
``removeemptydirs`` controls whether empty directories should be removed.
``removefiles`` controls whether files are removed.
``abortonerror`` causes an exception to be raised if an error occurs
deleting a file or directory.
``noop`` controls whether to actually remove files. If not defined, actions
will be taken.
``confirm`` ask confirmation before actually removing anything.
Returns an iterable of relative paths in the working directory that were
or would be removed.
"""
def remove(removefn, path):
try:
removefn(path)
except OSError:
m = _(b'%s cannot be removed') % path
if abortonerror:
raise error.Abort(m)
else:
repo.ui.warn(_(b'warning: %s\n') % m)
# There's no API to copy a matcher. So mutate the passed matcher and
# restore it when we're done.
oldtraversedir = matcher.traversedir
res = []
try:
if removeemptydirs:
directories = []
matcher.traversedir = directories.append
status = repo.status(match=matcher, ignored=ignored, unknown=unknown)
if confirm:
msg = None
nb_ignored = len(status.ignored)
nb_unknown = len(status.unknown)
if nb_unknown and nb_ignored:
msg = _(b"permanently delete %d unknown and %d ignored files?")
msg %= (nb_unknown, nb_ignored)
elif nb_unknown:
msg = _(b"permanently delete %d unknown files?")
msg %= nb_unknown
elif nb_ignored:
msg = _(b"permanently delete %d ignored files?")
msg %= nb_ignored
elif removeemptydirs:
dir_count = 0
for f in directories:
if matcher(f) and not repo.wvfs.listdir(f):
dir_count += 1
if dir_count:
msg = _(
b"permanently delete at least %d empty directories?"
)
msg %= dir_count
if msg is None:
return res
else:
msg += b" (yN)$$ &Yes $$ &No"
if repo.ui.promptchoice(msg, default=1) == 1:
raise error.CanceledError(_(b'removal cancelled'))
if removefiles:
for f in sorted(status.unknown + status.ignored):
if not noop:
repo.ui.note(_(b'removing file %s\n') % f)
remove(repo.wvfs.unlink, f)
res.append(f)
if removeemptydirs:
for f in sorted(directories, reverse=True):
if matcher(f) and not repo.wvfs.listdir(f):
if not noop:
repo.ui.note(_(b'removing directory %s\n') % f)
remove(repo.wvfs.rmdir, f)
res.append(f)
return res
finally:
matcher.traversedir = oldtraversedir