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Differential Revision: https://phab.mercurial-scm.org/D10674
# filemerge.py - file-level merge handling for Mercurial
#
# Copyright 2006, 2007, 2008 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.
from __future__ import absolute_import
import contextlib
import os
import re
import shutil
from .i18n import _
from .node import (
hex,
short,
)
from .pycompat import (
getattr,
open,
)
from . import (
encoding,
error,
formatter,
match,
pycompat,
registrar,
scmutil,
simplemerge,
tagmerge,
templatekw,
templater,
templateutil,
util,
)
from .utils import (
procutil,
stringutil,
)
def _toolstr(ui, tool, part, *args):
return ui.config(b"merge-tools", tool + b"." + part, *args)
def _toolbool(ui, tool, part, *args):
return ui.configbool(b"merge-tools", tool + b"." + part, *args)
def _toollist(ui, tool, part):
return ui.configlist(b"merge-tools", tool + b"." + part)
internals = {}
# Merge tools to document.
internalsdoc = {}
internaltool = registrar.internalmerge()
# internal tool merge types
nomerge = internaltool.nomerge
mergeonly = internaltool.mergeonly # just the full merge, no premerge
fullmerge = internaltool.fullmerge # both premerge and merge
# IMPORTANT: keep the last line of this prompt very short ("What do you want to
# do?") because of issue6158, ideally to <40 English characters (to allow other
# languages that may take more columns to still have a chance to fit in an
# 80-column screen).
_localchangedotherdeletedmsg = _(
b"file '%(fd)s' was deleted in other%(o)s but was modified in local%(l)s.\n"
b"You can use (c)hanged version, (d)elete, or leave (u)nresolved.\n"
b"What do you want to do?"
b"$$ &Changed $$ &Delete $$ &Unresolved"
)
_otherchangedlocaldeletedmsg = _(
b"file '%(fd)s' was deleted in local%(l)s but was modified in other%(o)s.\n"
b"You can use (c)hanged version, leave (d)eleted, or leave (u)nresolved.\n"
b"What do you want to do?"
b"$$ &Changed $$ &Deleted $$ &Unresolved"
)
class absentfilectx(object):
"""Represents a file that's ostensibly in a context but is actually not
present in it.
This is here because it's very specific to the filemerge code for now --
other code is likely going to break with the values this returns."""
def __init__(self, ctx, f):
self._ctx = ctx
self._f = f
def __bytes__(self):
return b'absent file %s@%s' % (self._f, self._ctx)
def path(self):
return self._f
def size(self):
return None
def data(self):
return None
def filenode(self):
return self._ctx.repo().nullid
_customcmp = True
def cmp(self, fctx):
"""compare with other file context
returns True if different from fctx.
"""
return not (
fctx.isabsent()
and fctx.changectx() == self.changectx()
and fctx.path() == self.path()
)
def flags(self):
return b''
def changectx(self):
return self._ctx
def isbinary(self):
return False
def isabsent(self):
return True
def _findtool(ui, tool):
if tool in internals:
return tool
cmd = _toolstr(ui, tool, b"executable", tool)
if cmd.startswith(b'python:'):
return cmd
return findexternaltool(ui, tool)
def _quotetoolpath(cmd):
if cmd.startswith(b'python:'):
return cmd
return procutil.shellquote(cmd)
def findexternaltool(ui, tool):
for kn in (b"regkey", b"regkeyalt"):
k = _toolstr(ui, tool, kn)
if not k:
continue
p = util.lookupreg(k, _toolstr(ui, tool, b"regname"))
if p:
p = procutil.findexe(p + _toolstr(ui, tool, b"regappend", b""))
if p:
return p
exe = _toolstr(ui, tool, b"executable", tool)
return procutil.findexe(util.expandpath(exe))
def _picktool(repo, ui, path, binary, symlink, changedelete):
strictcheck = ui.configbool(b'merge', b'strict-capability-check')
def hascapability(tool, capability, strict=False):
if tool in internals:
return strict and internals[tool].capabilities.get(capability)
return _toolbool(ui, tool, capability)
def supportscd(tool):
return tool in internals and internals[tool].mergetype == nomerge
def check(tool, pat, symlink, binary, changedelete):
tmsg = tool
if pat:
tmsg = _(b"%s (for pattern %s)") % (tool, pat)
if not _findtool(ui, tool):
if pat: # explicitly requested tool deserves a warning
ui.warn(_(b"couldn't find merge tool %s\n") % tmsg)
else: # configured but non-existing tools are more silent
ui.note(_(b"couldn't find merge tool %s\n") % tmsg)
elif symlink and not hascapability(tool, b"symlink", strictcheck):
ui.warn(_(b"tool %s can't handle symlinks\n") % tmsg)
elif binary and not hascapability(tool, b"binary", strictcheck):
ui.warn(_(b"tool %s can't handle binary\n") % tmsg)
elif changedelete and not supportscd(tool):
# the nomerge tools are the only tools that support change/delete
# conflicts
pass
elif not procutil.gui() and _toolbool(ui, tool, b"gui"):
ui.warn(_(b"tool %s requires a GUI\n") % tmsg)
else:
return True
return False
# internal config: ui.forcemerge
# forcemerge comes from command line arguments, highest priority
force = ui.config(b'ui', b'forcemerge')
if force:
toolpath = _findtool(ui, force)
if changedelete and not supportscd(toolpath):
return b":prompt", None
else:
if toolpath:
return (force, _quotetoolpath(toolpath))
else:
# mimic HGMERGE if given tool not found
return (force, force)
# HGMERGE takes next precedence
hgmerge = encoding.environ.get(b"HGMERGE")
if hgmerge:
if changedelete and not supportscd(hgmerge):
return b":prompt", None
else:
return (hgmerge, hgmerge)
# then patterns
# whether binary capability should be checked strictly
binarycap = binary and strictcheck
for pat, tool in ui.configitems(b"merge-patterns"):
mf = match.match(repo.root, b'', [pat])
if mf(path) and check(tool, pat, symlink, binarycap, changedelete):
if binary and not hascapability(tool, b"binary", strict=True):
ui.warn(
_(
b"warning: check merge-patterns configurations,"
b" if %r for binary file %r is unintentional\n"
b"(see 'hg help merge-tools'"
b" for binary files capability)\n"
)
% (pycompat.bytestr(tool), pycompat.bytestr(path))
)
toolpath = _findtool(ui, tool)
return (tool, _quotetoolpath(toolpath))
# then merge tools
tools = {}
disabled = set()
for k, v in ui.configitems(b"merge-tools"):
t = k.split(b'.')[0]
if t not in tools:
tools[t] = int(_toolstr(ui, t, b"priority"))
if _toolbool(ui, t, b"disabled"):
disabled.add(t)
names = tools.keys()
tools = sorted(
[(-p, tool) for tool, p in tools.items() if tool not in disabled]
)
uimerge = ui.config(b"ui", b"merge")
if uimerge:
# external tools defined in uimerge won't be able to handle
# change/delete conflicts
if check(uimerge, path, symlink, binary, changedelete):
if uimerge not in names and not changedelete:
return (uimerge, uimerge)
tools.insert(0, (None, uimerge)) # highest priority
tools.append((None, b"hgmerge")) # the old default, if found
for p, t in tools:
if check(t, None, symlink, binary, changedelete):
toolpath = _findtool(ui, t)
return (t, _quotetoolpath(toolpath))
# internal merge or prompt as last resort
if symlink or binary or changedelete:
if not changedelete and len(tools):
# any tool is rejected by capability for symlink or binary
ui.warn(_(b"no tool found to merge %s\n") % path)
return b":prompt", None
return b":merge", None
def _eoltype(data):
"""Guess the EOL type of a file"""
if b'\0' in data: # binary
return None
if b'\r\n' in data: # Windows
return b'\r\n'
if b'\r' in data: # Old Mac
return b'\r'
if b'\n' in data: # UNIX
return b'\n'
return None # unknown
def _matcheol(file, back):
"""Convert EOL markers in a file to match origfile"""
tostyle = _eoltype(back.data()) # No repo.wread filters?
if tostyle:
data = util.readfile(file)
style = _eoltype(data)
if style:
newdata = data.replace(style, tostyle)
if newdata != data:
util.writefile(file, newdata)
@internaltool(b'prompt', nomerge)
def _iprompt(repo, mynode, orig, fcd, fco, fca, toolconf, labels=None):
"""Asks the user which of the local `p1()` or the other `p2()` version to
keep as the merged version."""
ui = repo.ui
fd = fcd.path()
uipathfn = scmutil.getuipathfn(repo)
# Avoid prompting during an in-memory merge since it doesn't support merge
# conflicts.
if fcd.changectx().isinmemory():
raise error.InMemoryMergeConflictsError(
b'in-memory merge does not support file conflicts'
)
prompts = partextras(labels)
prompts[b'fd'] = uipathfn(fd)
try:
if fco.isabsent():
index = ui.promptchoice(_localchangedotherdeletedmsg % prompts, 2)
choice = [b'local', b'other', b'unresolved'][index]
elif fcd.isabsent():
index = ui.promptchoice(_otherchangedlocaldeletedmsg % prompts, 2)
choice = [b'other', b'local', b'unresolved'][index]
else:
# IMPORTANT: keep the last line of this prompt ("What do you want to
# do?") very short, see comment next to _localchangedotherdeletedmsg
# at the top of the file for details.
index = ui.promptchoice(
_(
b"file '%(fd)s' needs to be resolved.\n"
b"You can keep (l)ocal%(l)s, take (o)ther%(o)s, or leave "
b"(u)nresolved.\n"
b"What do you want to do?"
b"$$ &Local $$ &Other $$ &Unresolved"
)
% prompts,
2,
)
choice = [b'local', b'other', b'unresolved'][index]
if choice == b'other':
return _iother(repo, mynode, orig, fcd, fco, fca, toolconf, labels)
elif choice == b'local':
return _ilocal(repo, mynode, orig, fcd, fco, fca, toolconf, labels)
elif choice == b'unresolved':
return _ifail(repo, mynode, orig, fcd, fco, fca, toolconf, labels)
except error.ResponseExpected:
ui.write(b"\n")
return _ifail(repo, mynode, orig, fcd, fco, fca, toolconf, labels)
@internaltool(b'local', nomerge)
def _ilocal(repo, mynode, orig, fcd, fco, fca, toolconf, labels=None):
"""Uses the local `p1()` version of files as the merged version."""
return 0, fcd.isabsent()
@internaltool(b'other', nomerge)
def _iother(repo, mynode, orig, fcd, fco, fca, toolconf, labels=None):
"""Uses the other `p2()` version of files as the merged version."""
if fco.isabsent():
# local changed, remote deleted -- 'deleted' picked
_underlyingfctxifabsent(fcd).remove()
deleted = True
else:
_underlyingfctxifabsent(fcd).write(fco.data(), fco.flags())
deleted = False
return 0, deleted
@internaltool(b'fail', nomerge)
def _ifail(repo, mynode, orig, fcd, fco, fca, toolconf, labels=None):
"""
Rather than attempting to merge files that were modified on both
branches, it marks them as unresolved. The resolve command must be
used to resolve these conflicts."""
# for change/delete conflicts write out the changed version, then fail
if fcd.isabsent():
_underlyingfctxifabsent(fcd).write(fco.data(), fco.flags())
return 1, False
def _underlyingfctxifabsent(filectx):
"""Sometimes when resolving, our fcd is actually an absentfilectx, but
we want to write to it (to do the resolve). This helper returns the
underyling workingfilectx in that case.
"""
if filectx.isabsent():
return filectx.changectx()[filectx.path()]
else:
return filectx
def _premerge(repo, fcd, fco, fca, toolconf, files, labels=None):
tool, toolpath, binary, symlink, scriptfn = toolconf
if symlink or fcd.isabsent() or fco.isabsent():
return 1
unused, unused, unused, back = files
ui = repo.ui
validkeep = [b'keep', b'keep-merge3', b'keep-mergediff']
# do we attempt to simplemerge first?
try:
premerge = _toolbool(ui, tool, b"premerge", not binary)
except error.ConfigError:
premerge = _toolstr(ui, tool, b"premerge", b"").lower()
if premerge not in validkeep:
_valid = b', '.join([b"'" + v + b"'" for v in validkeep])
raise error.ConfigError(
_(b"%s.premerge not valid ('%s' is neither boolean nor %s)")
% (tool, premerge, _valid)
)
if premerge:
mode = b'merge'
if premerge in {b'keep-merge3', b'keep-mergediff'}:
if not labels:
labels = _defaultconflictlabels
if len(labels) < 3:
labels.append(b'base')
if premerge == b'keep-mergediff':
mode = b'mergediff'
r = simplemerge.simplemerge(
ui, fcd, fca, fco, quiet=True, label=labels, mode=mode
)
if not r:
ui.debug(b" premerge successful\n")
return 0
if premerge not in validkeep:
# restore from backup and try again
_restorebackup(fcd, back)
return 1 # continue merging
def _mergecheck(repo, mynode, orig, fcd, fco, fca, toolconf):
tool, toolpath, binary, symlink, scriptfn = toolconf
uipathfn = scmutil.getuipathfn(repo)
if symlink:
repo.ui.warn(
_(b'warning: internal %s cannot merge symlinks for %s\n')
% (tool, uipathfn(fcd.path()))
)
return False
if fcd.isabsent() or fco.isabsent():
repo.ui.warn(
_(
b'warning: internal %s cannot merge change/delete '
b'conflict for %s\n'
)
% (tool, uipathfn(fcd.path()))
)
return False
return True
def _merge(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels, mode):
"""
Uses the internal non-interactive simple merge algorithm for merging
files. It will fail if there are any conflicts and leave markers in
the partially merged file. Markers will have two sections, one for each side
of merge, unless mode equals 'union' which suppresses the markers."""
ui = repo.ui
r = simplemerge.simplemerge(ui, fcd, fca, fco, label=labels, mode=mode)
return True, r, False
@internaltool(
b'union',
fullmerge,
_(
b"warning: conflicts while merging %s! "
b"(edit, then use 'hg resolve --mark')\n"
),
precheck=_mergecheck,
)
def _iunion(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=None):
"""
Uses the internal non-interactive simple merge algorithm for merging
files. It will use both left and right sides for conflict regions.
No markers are inserted."""
return _merge(
repo, mynode, orig, fcd, fco, fca, toolconf, files, labels, b'union'
)
@internaltool(
b'merge',
fullmerge,
_(
b"warning: conflicts while merging %s! "
b"(edit, then use 'hg resolve --mark')\n"
),
precheck=_mergecheck,
)
def _imerge(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=None):
"""
Uses the internal non-interactive simple merge algorithm for merging
files. It will fail if there are any conflicts and leave markers in
the partially merged file. Markers will have two sections, one for each side
of merge."""
return _merge(
repo, mynode, orig, fcd, fco, fca, toolconf, files, labels, b'merge'
)
@internaltool(
b'merge3',
fullmerge,
_(
b"warning: conflicts while merging %s! "
b"(edit, then use 'hg resolve --mark')\n"
),
precheck=_mergecheck,
)
def _imerge3(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=None):
"""
Uses the internal non-interactive simple merge algorithm for merging
files. It will fail if there are any conflicts and leave markers in
the partially merged file. Marker will have three sections, one from each
side of the merge and one for the base content."""
if not labels:
labels = _defaultconflictlabels
if len(labels) < 3:
labels.append(b'base')
return _imerge(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels)
@internaltool(
b'merge3-lie-about-conflicts',
fullmerge,
b'',
precheck=_mergecheck,
)
def _imerge3alwaysgood(*args, **kwargs):
# Like merge3, but record conflicts as resolved with markers in place.
#
# This is used for `diff.merge` to show the differences between
# the auto-merge state and the committed merge state. It may be
# useful for other things.
b1, junk, b2 = _imerge3(*args, **kwargs)
# TODO is this right? I'm not sure what these return values mean,
# but as far as I can tell this will indicate to callers tha the
# merge succeeded.
return b1, False, b2
@internaltool(
b'mergediff',
fullmerge,
_(
b"warning: conflicts while merging %s! "
b"(edit, then use 'hg resolve --mark')\n"
),
precheck=_mergecheck,
)
def _imerge_diff(
repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=None
):
"""
Uses the internal non-interactive simple merge algorithm for merging
files. It will fail if there are any conflicts and leave markers in
the partially merged file. The marker will have two sections, one with the
content from one side of the merge, and one with a diff from the base
content to the content on the other side. (experimental)"""
if not labels:
labels = _defaultconflictlabels
if len(labels) < 3:
labels.append(b'base')
return _merge(
repo, mynode, orig, fcd, fco, fca, toolconf, files, labels, b'mergediff'
)
def _imergeauto(
repo,
mynode,
orig,
fcd,
fco,
fca,
toolconf,
files,
labels=None,
localorother=None,
):
"""
Generic driver for _imergelocal and _imergeother
"""
assert localorother is not None
r = simplemerge.simplemerge(
repo.ui, fcd, fca, fco, label=labels, localorother=localorother
)
return True, r
@internaltool(b'merge-local', mergeonly, precheck=_mergecheck)
def _imergelocal(*args, **kwargs):
"""
Like :merge, but resolve all conflicts non-interactively in favor
of the local `p1()` changes."""
success, status = _imergeauto(localorother=b'local', *args, **kwargs)
return success, status, False
@internaltool(b'merge-other', mergeonly, precheck=_mergecheck)
def _imergeother(*args, **kwargs):
"""
Like :merge, but resolve all conflicts non-interactively in favor
of the other `p2()` changes."""
success, status = _imergeauto(localorother=b'other', *args, **kwargs)
return success, status, False
@internaltool(
b'tagmerge',
mergeonly,
_(
b"automatic tag merging of %s failed! "
b"(use 'hg resolve --tool :merge' or another merge "
b"tool of your choice)\n"
),
)
def _itagmerge(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=None):
"""
Uses the internal tag merge algorithm (experimental).
"""
success, status = tagmerge.merge(repo, fcd, fco, fca)
return success, status, False
@internaltool(b'dump', fullmerge, binary=True, symlink=True)
def _idump(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=None):
"""
Creates three versions of the files to merge, containing the
contents of local, other and base. These files can then be used to
perform a merge manually. If the file to be merged is named
``a.txt``, these files will accordingly be named ``a.txt.local``,
``a.txt.other`` and ``a.txt.base`` and they will be placed in the
same directory as ``a.txt``.
This implies premerge. Therefore, files aren't dumped, if premerge
runs successfully. Use :forcedump to forcibly write files out.
"""
a = _workingpath(repo, fcd)
fd = fcd.path()
from . import context
if isinstance(fcd, context.overlayworkingfilectx):
raise error.InMemoryMergeConflictsError(
b'in-memory merge does not support the :dump tool.'
)
util.writefile(a + b".local", fcd.decodeddata())
repo.wwrite(fd + b".other", fco.data(), fco.flags())
repo.wwrite(fd + b".base", fca.data(), fca.flags())
return False, 1, False
@internaltool(b'forcedump', mergeonly, binary=True, symlink=True)
def _forcedump(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=None):
"""
Creates three versions of the files as same as :dump, but omits premerge.
"""
return _idump(
repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=labels
)
def _xmergeimm(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels=None):
# In-memory merge simply raises an exception on all external merge tools,
# for now.
#
# It would be possible to run most tools with temporary files, but this
# raises the question of what to do if the user only partially resolves the
# file -- we can't leave a merge state. (Copy to somewhere in the .hg/
# directory and tell the user how to get it is my best idea, but it's
# clunky.)
raise error.InMemoryMergeConflictsError(
b'in-memory merge does not support external merge tools'
)
def _describemerge(ui, repo, mynode, fcl, fcb, fco, env, toolpath, args):
tmpl = ui.config(b'command-templates', b'pre-merge-tool-output')
if not tmpl:
return
mappingdict = templateutil.mappingdict
props = {
b'ctx': fcl.changectx(),
b'node': hex(mynode),
b'path': fcl.path(),
b'local': mappingdict(
{
b'ctx': fcl.changectx(),
b'fctx': fcl,
b'node': hex(mynode),
b'name': _(b'local'),
b'islink': b'l' in fcl.flags(),
b'label': env[b'HG_MY_LABEL'],
}
),
b'base': mappingdict(
{
b'ctx': fcb.changectx(),
b'fctx': fcb,
b'name': _(b'base'),
b'islink': b'l' in fcb.flags(),
b'label': env[b'HG_BASE_LABEL'],
}
),
b'other': mappingdict(
{
b'ctx': fco.changectx(),
b'fctx': fco,
b'name': _(b'other'),
b'islink': b'l' in fco.flags(),
b'label': env[b'HG_OTHER_LABEL'],
}
),
b'toolpath': toolpath,
b'toolargs': args,
}
# TODO: make all of this something that can be specified on a per-tool basis
tmpl = templater.unquotestring(tmpl)
# Not using cmdutil.rendertemplate here since it causes errors importing
# things for us to import cmdutil.
tres = formatter.templateresources(ui, repo)
t = formatter.maketemplater(
ui, tmpl, defaults=templatekw.keywords, resources=tres
)
ui.status(t.renderdefault(props))
def _xmerge(repo, mynode, orig, fcd, fco, fca, toolconf, files, labels):
tool, toolpath, binary, symlink, scriptfn = toolconf
uipathfn = scmutil.getuipathfn(repo)
if fcd.isabsent() or fco.isabsent():
repo.ui.warn(
_(b'warning: %s cannot merge change/delete conflict for %s\n')
% (tool, uipathfn(fcd.path()))
)
return False, 1, None
unused, unused, unused, back = files
localpath = _workingpath(repo, fcd)
args = _toolstr(repo.ui, tool, b"args")
with _maketempfiles(
repo, fco, fca, repo.wvfs.join(back.path()), b"$output" in args
) as temppaths:
basepath, otherpath, localoutputpath = temppaths
outpath = b""
mylabel, otherlabel = labels[:2]
if len(labels) >= 3:
baselabel = labels[2]
else:
baselabel = b'base'
env = {
b'HG_FILE': fcd.path(),
b'HG_MY_NODE': short(mynode),
b'HG_OTHER_NODE': short(fco.changectx().node()),
b'HG_BASE_NODE': short(fca.changectx().node()),
b'HG_MY_ISLINK': b'l' in fcd.flags(),
b'HG_OTHER_ISLINK': b'l' in fco.flags(),
b'HG_BASE_ISLINK': b'l' in fca.flags(),
b'HG_MY_LABEL': mylabel,
b'HG_OTHER_LABEL': otherlabel,
b'HG_BASE_LABEL': baselabel,
}
ui = repo.ui
if b"$output" in args:
# read input from backup, write to original
outpath = localpath
localpath = localoutputpath
replace = {
b'local': localpath,
b'base': basepath,
b'other': otherpath,
b'output': outpath,
b'labellocal': mylabel,
b'labelother': otherlabel,
b'labelbase': baselabel,
}
args = util.interpolate(
br'\$',
replace,
args,
lambda s: procutil.shellquote(util.localpath(s)),
)
if _toolbool(ui, tool, b"gui"):
repo.ui.status(
_(b'running merge tool %s for file %s\n')
% (tool, uipathfn(fcd.path()))
)
if scriptfn is None:
cmd = toolpath + b' ' + args
repo.ui.debug(b'launching merge tool: %s\n' % cmd)
_describemerge(ui, repo, mynode, fcd, fca, fco, env, toolpath, args)
r = ui.system(
cmd, cwd=repo.root, environ=env, blockedtag=b'mergetool'
)
else:
repo.ui.debug(
b'launching python merge script: %s:%s\n' % (toolpath, scriptfn)
)
r = 0
try:
# avoid cycle cmdutil->merge->filemerge->extensions->cmdutil
from . import extensions
mod = extensions.loadpath(toolpath, b'hgmerge.%s' % tool)
except Exception:
raise error.Abort(
_(b"loading python merge script failed: %s") % toolpath
)
mergefn = getattr(mod, scriptfn, None)
if mergefn is None:
raise error.Abort(
_(b"%s does not have function: %s") % (toolpath, scriptfn)
)
argslist = procutil.shellsplit(args)
# avoid cycle cmdutil->merge->filemerge->hook->extensions->cmdutil
from . import hook
ret, raised = hook.pythonhook(
ui, repo, b"merge", toolpath, mergefn, {b'args': argslist}, True
)
if raised:
r = 1
repo.ui.debug(b'merge tool returned: %d\n' % r)
return True, r, False
def _formatconflictmarker(ctx, template, label, pad):
"""Applies the given template to the ctx, prefixed by the label.
Pad is the minimum width of the label prefix, so that multiple markers
can have aligned templated parts.
"""
if ctx.node() is None:
ctx = ctx.p1()
props = {b'ctx': ctx}
templateresult = template.renderdefault(props)
label = (b'%s:' % label).ljust(pad + 1)
mark = b'%s %s' % (label, templateresult)
if mark:
mark = mark.splitlines()[0] # split for safety
# 8 for the prefix of conflict marker lines (e.g. '<<<<<<< ')
return stringutil.ellipsis(mark, 80 - 8)
_defaultconflictlabels = [b'local', b'other']
def _formatlabels(repo, fcd, fco, fca, labels, tool=None):
"""Formats the given labels using the conflict marker template.
Returns a list of formatted labels.
"""
cd = fcd.changectx()
co = fco.changectx()
ca = fca.changectx()
ui = repo.ui
template = ui.config(b'command-templates', b'mergemarker')
if tool is not None:
template = _toolstr(ui, tool, b'mergemarkertemplate', template)
template = templater.unquotestring(template)
tres = formatter.templateresources(ui, repo)
tmpl = formatter.maketemplater(
ui, template, defaults=templatekw.keywords, resources=tres
)
pad = max(len(l) for l in labels)
newlabels = [
_formatconflictmarker(cd, tmpl, labels[0], pad),
_formatconflictmarker(co, tmpl, labels[1], pad),
]
if len(labels) > 2:
newlabels.append(_formatconflictmarker(ca, tmpl, labels[2], pad))
return newlabels
def partextras(labels):
"""Return a dictionary of extra labels for use in prompts to the user
Intended use is in strings of the form "(l)ocal%(l)s".
"""
if labels is None:
return {
b"l": b"",
b"o": b"",
}
return {
b"l": b" [%s]" % labels[0],
b"o": b" [%s]" % labels[1],
}
def _restorebackup(fcd, back):
# TODO: Add a workingfilectx.write(otherfilectx) path so we can use
# util.copy here instead.
fcd.write(back.data(), fcd.flags())
def _makebackup(repo, ui, wctx, fcd, premerge):
"""Makes and returns a filectx-like object for ``fcd``'s backup file.
In addition to preserving the user's pre-existing modifications to `fcd`
(if any), the backup is used to undo certain premerges, confirm whether a
merge changed anything, and determine what line endings the new file should
have.
Backups only need to be written once (right before the premerge) since their
content doesn't change afterwards.
"""
if fcd.isabsent():
return None
# TODO: Break this import cycle somehow. (filectx -> ctx -> fileset ->
# merge -> filemerge). (I suspect the fileset import is the weakest link)
from . import context
back = scmutil.backuppath(ui, repo, fcd.path())
inworkingdir = back.startswith(repo.wvfs.base) and not back.startswith(
repo.vfs.base
)
if isinstance(fcd, context.overlayworkingfilectx) and inworkingdir:
# If the backup file is to be in the working directory, and we're
# merging in-memory, we must redirect the backup to the memory context
# so we don't disturb the working directory.
relpath = back[len(repo.wvfs.base) + 1 :]
if premerge:
wctx[relpath].write(fcd.data(), fcd.flags())
return wctx[relpath]
else:
if premerge:
# Otherwise, write to wherever path the user specified the backups
# should go. We still need to switch based on whether the source is
# in-memory so we can use the fast path of ``util.copy`` if both are
# on disk.
if isinstance(fcd, context.overlayworkingfilectx):
util.writefile(back, fcd.data())
else:
a = _workingpath(repo, fcd)
util.copyfile(a, back)
# A arbitraryfilectx is returned, so we can run the same functions on
# the backup context regardless of where it lives.
return context.arbitraryfilectx(back, repo=repo)
@contextlib.contextmanager
def _maketempfiles(repo, fco, fca, localpath, uselocalpath):
"""Writes out `fco` and `fca` as temporary files, and (if uselocalpath)
copies `localpath` to another temporary file, so an external merge tool may
use them.
"""
tmproot = None
tmprootprefix = repo.ui.config(b'experimental', b'mergetempdirprefix')
if tmprootprefix:
tmproot = pycompat.mkdtemp(prefix=tmprootprefix)
def maketempfrompath(prefix, path):
fullbase, ext = os.path.splitext(path)
pre = b"%s~%s" % (os.path.basename(fullbase), prefix)
if tmproot:
name = os.path.join(tmproot, pre)
if ext:
name += ext
f = open(name, "wb")
else:
fd, name = pycompat.mkstemp(prefix=pre + b'.', suffix=ext)
f = os.fdopen(fd, "wb")
return f, name
def tempfromcontext(prefix, ctx):
f, name = maketempfrompath(prefix, ctx.path())
data = repo.wwritedata(ctx.path(), ctx.data())
f.write(data)
f.close()
return name
b = tempfromcontext(b"base", fca)
c = tempfromcontext(b"other", fco)
d = localpath
if uselocalpath:
# We start off with this being the backup filename, so remove the .orig
# to make syntax-highlighting more likely.
if d.endswith(b'.orig'):
d, _ = os.path.splitext(d)
f, d = maketempfrompath(b"local", d)
with open(localpath, b'rb') as src:
f.write(src.read())
f.close()
try:
yield b, c, d
finally:
if tmproot:
shutil.rmtree(tmproot)
else:
util.unlink(b)
util.unlink(c)
# if not uselocalpath, d is the 'orig'/backup file which we
# shouldn't delete.
if d and uselocalpath:
util.unlink(d)
def _filemerge(premerge, repo, wctx, mynode, orig, fcd, fco, fca, labels=None):
"""perform a 3-way merge in the working directory
premerge = whether this is a premerge
mynode = parent node before merge
orig = original local filename before merge
fco = other file context
fca = ancestor file context
fcd = local file context for current/destination file
Returns whether the merge is complete, the return value of the merge, and
a boolean indicating whether the file was deleted from disk."""
if not fco.cmp(fcd): # files identical?
return True, None, False
ui = repo.ui
fd = fcd.path()
uipathfn = scmutil.getuipathfn(repo)
fduipath = uipathfn(fd)
binary = fcd.isbinary() or fco.isbinary() or fca.isbinary()
symlink = b'l' in fcd.flags() + fco.flags()
changedelete = fcd.isabsent() or fco.isabsent()
tool, toolpath = _picktool(repo, ui, fd, binary, symlink, changedelete)
scriptfn = None
if tool in internals and tool.startswith(b'internal:'):
# normalize to new-style names (':merge' etc)
tool = tool[len(b'internal') :]
if toolpath and toolpath.startswith(b'python:'):
invalidsyntax = False
if toolpath.count(b':') >= 2:
script, scriptfn = toolpath[7:].rsplit(b':', 1)
if not scriptfn:
invalidsyntax = True
# missing :callable can lead to spliting on windows drive letter
if b'\\' in scriptfn or b'/' in scriptfn:
invalidsyntax = True
else:
invalidsyntax = True
if invalidsyntax:
raise error.Abort(_(b"invalid 'python:' syntax: %s") % toolpath)
toolpath = script
ui.debug(
b"picked tool '%s' for %s (binary %s symlink %s changedelete %s)\n"
% (
tool,
fduipath,
pycompat.bytestr(binary),
pycompat.bytestr(symlink),
pycompat.bytestr(changedelete),
)
)
if tool in internals:
func = internals[tool]
mergetype = func.mergetype
onfailure = func.onfailure
precheck = func.precheck
isexternal = False
else:
if wctx.isinmemory():
func = _xmergeimm
else:
func = _xmerge
mergetype = fullmerge
onfailure = _(b"merging %s failed!\n")
precheck = None
isexternal = True
toolconf = tool, toolpath, binary, symlink, scriptfn
if mergetype == nomerge:
r, deleted = func(repo, mynode, orig, fcd, fco, fca, toolconf, labels)
return True, r, deleted
if premerge:
if orig != fco.path():
ui.status(
_(b"merging %s and %s to %s\n")
% (uipathfn(orig), uipathfn(fco.path()), fduipath)
)
else:
ui.status(_(b"merging %s\n") % fduipath)
ui.debug(b"my %s other %s ancestor %s\n" % (fcd, fco, fca))
if precheck and not precheck(repo, mynode, orig, fcd, fco, fca, toolconf):
if onfailure:
if wctx.isinmemory():
raise error.InMemoryMergeConflictsError(
b'in-memory merge does not support merge conflicts'
)
ui.warn(onfailure % fduipath)
return True, 1, False
back = _makebackup(repo, ui, wctx, fcd, premerge)
files = (None, None, None, back)
r = 1
try:
internalmarkerstyle = ui.config(b'ui', b'mergemarkers')
if isexternal:
markerstyle = _toolstr(ui, tool, b'mergemarkers')
else:
markerstyle = internalmarkerstyle
if not labels:
labels = _defaultconflictlabels
formattedlabels = labels
if markerstyle != b'basic':
formattedlabels = _formatlabels(
repo, fcd, fco, fca, labels, tool=tool
)
if premerge and mergetype == fullmerge:
# conflict markers generated by premerge will use 'detailed'
# settings if either ui.mergemarkers or the tool's mergemarkers
# setting is 'detailed'. This way tools can have basic labels in
# space-constrained areas of the UI, but still get full information
# in conflict markers if premerge is 'keep' or 'keep-merge3'.
premergelabels = labels
labeltool = None
if markerstyle != b'basic':
# respect 'tool's mergemarkertemplate (which defaults to
# command-templates.mergemarker)
labeltool = tool
if internalmarkerstyle != b'basic' or markerstyle != b'basic':
premergelabels = _formatlabels(
repo, fcd, fco, fca, premergelabels, tool=labeltool
)
r = _premerge(
repo, fcd, fco, fca, toolconf, files, labels=premergelabels
)
# complete if premerge successful (r is 0)
return not r, r, False
needcheck, r, deleted = func(
repo,
mynode,
orig,
fcd,
fco,
fca,
toolconf,
files,
labels=formattedlabels,
)
if needcheck:
r = _check(repo, r, ui, tool, fcd, files)
if r:
if onfailure:
if wctx.isinmemory():
raise error.InMemoryMergeConflictsError(
b'in-memory merge '
b'does not support '
b'merge conflicts'
)
ui.warn(onfailure % fduipath)
_onfilemergefailure(ui)
return True, r, deleted
finally:
if not r and back is not None:
back.remove()
def _haltmerge():
msg = _(b'merge halted after failed merge (see hg resolve)')
raise error.InterventionRequired(msg)
def _onfilemergefailure(ui):
action = ui.config(b'merge', b'on-failure')
if action == b'prompt':
msg = _(b'continue merge operation (yn)?$$ &Yes $$ &No')
if ui.promptchoice(msg, 0) == 1:
_haltmerge()
if action == b'halt':
_haltmerge()
# default action is 'continue', in which case we neither prompt nor halt
def hasconflictmarkers(data):
return bool(
re.search(
br"^(<<<<<<<.*|=======.*|------- .*|\+\+\+\+\+\+\+ .*|>>>>>>>.*)$",
data,
re.MULTILINE,
)
)
def _check(repo, r, ui, tool, fcd, files):
fd = fcd.path()
uipathfn = scmutil.getuipathfn(repo)
unused, unused, unused, back = files
if not r and (
_toolbool(ui, tool, b"checkconflicts")
or b'conflicts' in _toollist(ui, tool, b"check")
):
if hasconflictmarkers(fcd.data()):
r = 1
checked = False
if b'prompt' in _toollist(ui, tool, b"check"):
checked = True
if ui.promptchoice(
_(b"was merge of '%s' successful (yn)?$$ &Yes $$ &No")
% uipathfn(fd),
1,
):
r = 1
if (
not r
and not checked
and (
_toolbool(ui, tool, b"checkchanged")
or b'changed' in _toollist(ui, tool, b"check")
)
):
if back is not None and not fcd.cmp(back):
if ui.promptchoice(
_(
b" output file %s appears unchanged\n"
b"was merge successful (yn)?"
b"$$ &Yes $$ &No"
)
% uipathfn(fd),
1,
):
r = 1
if back is not None and _toolbool(ui, tool, b"fixeol"):
_matcheol(_workingpath(repo, fcd), back)
return r
def _workingpath(repo, ctx):
return repo.wjoin(ctx.path())
def premerge(repo, wctx, mynode, orig, fcd, fco, fca, labels=None):
return _filemerge(
True, repo, wctx, mynode, orig, fcd, fco, fca, labels=labels
)
def filemerge(repo, wctx, mynode, orig, fcd, fco, fca, labels=None):
return _filemerge(
False, repo, wctx, mynode, orig, fcd, fco, fca, labels=labels
)
def loadinternalmerge(ui, extname, registrarobj):
"""Load internal merge tool from specified registrarobj"""
for name, func in pycompat.iteritems(registrarobj._table):
fullname = b':' + name
internals[fullname] = func
internals[b'internal:' + name] = func
internalsdoc[fullname] = func
capabilities = sorted([k for k, v in func.capabilities.items() if v])
if capabilities:
capdesc = b" (actual capabilities: %s)" % b', '.join(
capabilities
)
func.__doc__ = func.__doc__ + pycompat.sysstr(b"\n\n%s" % capdesc)
# to put i18n comments into hg.pot for automatically generated texts
# i18n: "binary" and "symlink" are keywords
# i18n: this text is added automatically
_(b" (actual capabilities: binary, symlink)")
# i18n: "binary" is keyword
# i18n: this text is added automatically
_(b" (actual capabilities: binary)")
# i18n: "symlink" is keyword
# i18n: this text is added automatically
_(b" (actual capabilities: symlink)")
# load built-in merge tools explicitly to setup internalsdoc
loadinternalmerge(None, None, internaltool)
# tell hggettext to extract docstrings from these functions:
i18nfunctions = internals.values()