filemerge: move check for identical sides out of filemerge()

`filemerge.filemerge()` returns `None` if no merge was necessary
because the two sides were identical. I don't think it should be that
function's responsibility to handle that case; we should ideally not
even call `filemerge.filemerge()` if the two inputs identical. This
patch therefore moves the check out to the caller (`mergestate.py`).

The largefiles test changed because we now notice that the two sides
made the same change, so we don't consider it a merge. Also note that
the new message better matches the line above it in the test output.

Differential Revision: https://phab.mercurial-scm.org/D12154

mercurial/filemerge.py

@@ -1,1274 +1,1270 b''
 # filemerge.py - file-level merge handling for Mercurial
 #
 # Copyright 2006, 2007, 2008 Olivia Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 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, backup):
     """Convert EOL markers in a file to match origfile"""
     tostyle = _eoltype(backup.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, local, other, base, toolconf):
     """Asks the user which of the local `p1()` or the other `p2()` version to
     keep as the merged version."""
     ui = repo.ui
     fd = local.fctx.path()
     uipathfn = scmutil.getuipathfn(repo)
 
     # Avoid prompting during an in-memory merge since it doesn't support merge
     # conflicts.
     if local.fctx.changectx().isinmemory():
         raise error.InMemoryMergeConflictsError(
             b'in-memory merge does not support file conflicts'
         )
 
     prompts = partextras([local.label, other.label])
     prompts[b'fd'] = uipathfn(fd)
     try:
         if other.fctx.isabsent():
             index = ui.promptchoice(_localchangedotherdeletedmsg % prompts, 2)
             choice = [b'local', b'other', b'unresolved'][index]
         elif local.fctx.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, local, other, base, toolconf)
         elif choice == b'local':
             return _ilocal(repo, mynode, local, other, base, toolconf)
         elif choice == b'unresolved':
             return _ifail(repo, mynode, local, other, base, toolconf)
     except error.ResponseExpected:
         ui.write(b"\n")
         return _ifail(repo, mynode, local, other, base, toolconf)
 
 
 @internaltool(b'local', nomerge)
 def _ilocal(repo, mynode, local, other, base, toolconf):
     """Uses the local `p1()` version of files as the merged version."""
     return 0, local.fctx.isabsent()
 
 
 @internaltool(b'other', nomerge)
 def _iother(repo, mynode, local, other, base, toolconf):
     """Uses the other `p2()` version of files as the merged version."""
     if other.fctx.isabsent():
         # local changed, remote deleted -- 'deleted' picked
         _underlyingfctxifabsent(local.fctx).remove()
         deleted = True
     else:
         _underlyingfctxifabsent(local.fctx).write(
             other.fctx.data(), other.fctx.flags()
         )
         deleted = False
     return 0, deleted
 
 
 @internaltool(b'fail', nomerge)
 def _ifail(repo, mynode, local, other, base, toolconf):
     """
     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 local.fctx.isabsent():
         _underlyingfctxifabsent(local.fctx).write(
             other.fctx.data(), other.fctx.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 _verifytext(input, ui):
     """verifies that text is non-binary"""
     if stringutil.binary(input.text()):
         msg = _(b"%s looks like a binary file.") % input.fctx.path()
         ui.warn(_(b'warning: %s\n') % msg)
         raise error.Abort(msg)
 
 
 def _premerge(repo, local, other, base, toolconf):
     tool, toolpath, binary, symlink, scriptfn = toolconf
     if symlink or local.fctx.isabsent() or other.fctx.isabsent():
         return 1
 
     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 == b'keep-mergediff':
             mode = b'mergediff'
         elif premerge == b'keep-merge3':
             mode = b'merge3'
         if any(
             stringutil.binary(input.text()) for input in (local, base, other)
         ):
             return 1  # continue merging
         merged_text, conflicts = simplemerge.simplemerge(
             local, base, other, mode=mode
         )
         if not conflicts or premerge in validkeep:
             # fcd.flags() already has the merged flags (done in
             # mergestate.resolve())
             local.fctx.write(merged_text, local.fctx.flags())
         if not conflicts:
             ui.debug(b" premerge successful\n")
             return 0
     return 1  # continue merging
 
 
 def _mergecheck(repo, mynode, 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, local, other, base, 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
 
     try:
         _verifytext(local, ui)
         _verifytext(base, ui)
         _verifytext(other, ui)
     except error.Abort:
         return True, True, False
     else:
         merged_text, conflicts = simplemerge.simplemerge(
             local, base, other, mode=mode
         )
         # fcd.flags() already has the merged flags (done in
         # mergestate.resolve())
         local.fctx.write(merged_text, local.fctx.flags())
         return True, conflicts, 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, local, other, base, toolconf, backup):
     """
     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, local, other, base, 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, local, other, base, toolconf, backup):
     """
     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, local, other, base, 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, local, other, base, toolconf, backup):
     """
     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."""
     return _merge(repo, local, other, base, b'merge3')
 
 
 @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, local, other, base, toolconf, backup):
     """
     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)"""
     return _merge(repo, local, other, base, b'mergediff')
 
 
 @internaltool(b'merge-local', mergeonly, precheck=_mergecheck)
 def _imergelocal(repo, mynode, local, other, base, toolconf, backup):
     """
     Like :merge, but resolve all conflicts non-interactively in favor
     of the local `p1()` changes."""
     return _merge(repo, local, other, base, b'local')
 
 
 @internaltool(b'merge-other', mergeonly, precheck=_mergecheck)
 def _imergeother(repo, mynode, local, other, base, toolconf, backup):
     """
     Like :merge, but resolve all conflicts non-interactively in favor
     of the other `p2()` changes."""
     return _merge(repo, local, other, base, b'other')
 
 
 @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, local, other, base, toolconf, backup):
     """
     Uses the internal tag merge algorithm (experimental).
     """
     success, status = tagmerge.merge(repo, local.fctx, other.fctx, base.fctx)
     return success, status, False
 
 
 @internaltool(b'dump', fullmerge, binary=True, symlink=True)
 def _idump(repo, mynode, local, other, base, toolconf, backup):
     """
     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, local.fctx)
     fd = local.fctx.path()
 
     from . import context
 
     if isinstance(local.fctx, context.overlayworkingfilectx):
         raise error.InMemoryMergeConflictsError(
             b'in-memory merge does not support the :dump tool.'
         )
 
     util.writefile(a + b".local", local.fctx.decodeddata())
     repo.wwrite(fd + b".other", other.fctx.data(), other.fctx.flags())
     repo.wwrite(fd + b".base", base.fctx.data(), base.fctx.flags())
     return False, 1, False
 
 
 @internaltool(b'forcedump', mergeonly, binary=True, symlink=True)
 def _forcedump(repo, mynode, local, other, base, toolconf, backup):
     """
     Creates three versions of the files as same as :dump, but omits premerge.
     """
     return _idump(repo, mynode, local, other, base, toolconf, backup)
 
 
 def _xmergeimm(repo, mynode, local, other, base, toolconf, backup):
     # 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, local, other, base, toolconf, backup):
     fcd = local.fctx
     fco = other.fctx
     fca = base.fctx
     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
     localpath = _workingpath(repo, fcd)
     args = _toolstr(repo.ui, tool, b"args")
 
     with _maketempfiles(
         repo, fco, fca, repo.wvfs.join(backup.path()), b"$output" in args
     ) as temppaths:
         basepath, otherpath, localoutputpath = temppaths
         outpath = b""
 
         def format_label(input):
             if input.label_detail:
                 return b'%s: %s' % (input.label, input.label_detail)
             else:
                 return input.label
 
         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': format_label(local),
             b'HG_OTHER_LABEL': format_label(other),
             b'HG_BASE_LABEL': format_label(base),
         }
         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': format_label(local),
             b'labelother': format_label(other),
             b'labelbase': format_label(base),
         }
         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 _populate_label_detail(input, template):
     """Applies the given template to the ctx and stores it in the input."""
     ctx = input.fctx.changectx()
     if ctx.node() is None:
         ctx = ctx.p1()
 
     props = {b'ctx': ctx}
     templateresult = template.renderdefault(props)
     input.label_detail = templateresult.splitlines()[0]  # split for safety
 
 
 def _populate_label_details(repo, inputs, tool=None):
     """Populates the label details using the conflict marker template."""
     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
     )
 
     for input in inputs:
         _populate_label_detail(input, tmpl)
 
 
 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 _makebackup(repo, ui, wctx, fcd):
     """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 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
 
     backup = scmutil.backuppath(ui, repo, fcd.path())
     inworkingdir = backup.startswith(repo.wvfs.base) and not backup.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 = backup[len(repo.wvfs.base) + 1 :]
         wctx[relpath].write(fcd.data(), fcd.flags())
         return wctx[relpath]
     else:
         # 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(backup, fcd.data())
         else:
             a = _workingpath(repo, fcd)
             util.copyfile(a, backup)
         # A arbitraryfilectx is returned, so we can run the same functions on
         # the backup context regardless of where it lives.
         return context.arbitraryfilectx(backup, 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 = ctx.decodeddata()
         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(repo, wctx, mynode, orig, fcd, fco, fca, labels=None):
     """perform a 3-way merge in the working directory
 
     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 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 not labels:
         labels = [b'local', b'other']
     if len(labels) < 3:
         labels.append(b'base')
     local = simplemerge.MergeInput(fcd, labels[0])
     other = simplemerge.MergeInput(fco, labels[1])
     base = simplemerge.MergeInput(fca, labels[2])
     if mergetype == nomerge:
         return func(
             repo,
             mynode,
             local,
             other,
             base,
             toolconf,
         )
 
     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, 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 1, False
 
     backup = _makebackup(repo, ui, wctx, fcd)
     r = 1
     try:
         internalmarkerstyle = ui.config(b'ui', b'mergemarkers')
         if isexternal:
             markerstyle = _toolstr(ui, tool, b'mergemarkers')
         else:
             markerstyle = internalmarkerstyle
 
         if 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'.
             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':
                 _populate_label_details(
                     repo, [local, other, base], tool=labeltool
                 )
 
             r = _premerge(
                 repo,
                 local,
                 other,
                 base,
                 toolconf,
             )
             # we're done if premerge was successful (r is 0)
             if not r:
                 return r, False
 
             # Reset to basic labels
             local.label_detail = None
             other.label_detail = None
             base.label_detail = None
 
         if markerstyle != b'basic':
             _populate_label_details(repo, [local, other, base], tool=tool)
 
         needcheck, r, deleted = func(
             repo,
             mynode,
             local,
             other,
             base,
             toolconf,
             backup,
         )
 
         if needcheck:
             r = _check(repo, r, ui, tool, fcd, backup)
 
         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 r, deleted
     finally:
         if not r and backup is not None:
             backup.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):
     # Detect lines starting with a string of 7 identical characters from the
     # subset Mercurial uses for conflict markers, followed by either the end of
     # line or a space and some text. Note that using [<>=+|-]{7} would detect
     # `<><><><><` as a conflict marker, which we don't want.
     return bool(
         re.search(
             br"^([<>=+|-])\1{6}( .*)$",
             data,
             re.MULTILINE,
         )
     )
 
 
 def _check(repo, r, ui, tool, fcd, backup):
     fd = fcd.path()
     uipathfn = scmutil.getuipathfn(repo)
 
     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 backup is not None and not fcd.cmp(backup):
             if ui.promptchoice(
                 _(
                     b" output file %s appears unchanged\n"
                     b"was merge successful (yn)?"
                     b"$$ &Yes $$ &No"
                 )
                 % uipathfn(fd),
                 1,
             ):
                 r = 1
 
     if backup is not None and _toolbool(ui, tool, b"fixeol"):
         _matcheol(_workingpath(repo, fcd), backup)
 
     return r
 
 
 def _workingpath(repo, ctx):
     return repo.wjoin(ctx.path())
 
 
 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()

mercurial/mergestate.py

@@ -1,914 +1,916 b''
 from __future__ import absolute_import
 
 import collections
 import errno
 import shutil
 import struct
 import weakref
 
 from .i18n import _
 from .node import (
     bin,
     hex,
     nullrev,
 )
 from . import (
     error,
     filemerge,
     pycompat,
     util,
 )
 from .utils import hashutil
 
 _pack = struct.pack
 _unpack = struct.unpack
 
 
 def _droponode(data):
     # used for compatibility for v1
     bits = data.split(b'\0')
     bits = bits[:-2] + bits[-1:]
     return b'\0'.join(bits)
 
 
 def _filectxorabsent(hexnode, ctx, f):
     if hexnode == ctx.repo().nodeconstants.nullhex:
         return filemerge.absentfilectx(ctx, f)
     else:
         return ctx[f]
 
 
 # Merge state record types. See ``mergestate`` docs for more.
 
 ####
 # merge records which records metadata about a current merge
 # exists only once in a mergestate
 #####
 RECORD_LOCAL = b'L'
 RECORD_OTHER = b'O'
 # record merge labels
 RECORD_LABELS = b'l'
 
 #####
 # record extra information about files, with one entry containing info about one
 # file. Hence, multiple of them can exists
 #####
 RECORD_FILE_VALUES = b'f'
 
 #####
 # merge records which represents state of individual merges of files/folders
 # These are top level records for each entry containing merge related info.
 # Each record of these has info about one file. Hence multiple of them can
 # exists
 #####
 RECORD_MERGED = b'F'
 RECORD_CHANGEDELETE_CONFLICT = b'C'
 # the path was dir on one side of merge and file on another
 RECORD_PATH_CONFLICT = b'P'
 
 #####
 # possible state which a merge entry can have. These are stored inside top-level
 # merge records mentioned just above.
 #####
 MERGE_RECORD_UNRESOLVED = b'u'
 MERGE_RECORD_RESOLVED = b'r'
 MERGE_RECORD_UNRESOLVED_PATH = b'pu'
 MERGE_RECORD_RESOLVED_PATH = b'pr'
 # represents that the file was automatically merged in favor
 # of other version. This info is used on commit.
 # This is now deprecated and commit related information is now
 # stored in RECORD_FILE_VALUES
 MERGE_RECORD_MERGED_OTHER = b'o'
 
 #####
 # top level record which stores other unknown records. Multiple of these can
 # exists
 #####
 RECORD_OVERRIDE = b't'
 
 #####
 # legacy records which are no longer used but kept to prevent breaking BC
 #####
 # This record was release in 5.4 and usage was removed in 5.5
 LEGACY_RECORD_RESOLVED_OTHER = b'R'
 # This record was release in 3.7 and usage was removed in 5.6
 LEGACY_RECORD_DRIVER_RESOLVED = b'd'
 # This record was release in 3.7 and usage was removed in 5.6
 LEGACY_MERGE_DRIVER_STATE = b'm'
 # This record was release in 3.7 and usage was removed in 5.6
 LEGACY_MERGE_DRIVER_MERGE = b'D'
 
 CHANGE_ADDED = b'added'
 CHANGE_REMOVED = b'removed'
 CHANGE_MODIFIED = b'modified'
 
 
 class MergeAction(object):
     """represent an "action" merge need to take for a given file
 
     Attributes:
 
     _short: internal representation used to identify each action
 
     no_op:  True if the action does affect the file content or tracking status
 
     narrow_safe:
         True if the action can be safely used for a file outside of the narrow
         set
 
     changes:
         The types of changes that this actions involves. This is a work in
         progress and not all actions have one yet. In addition, some requires
         user changes and cannot be fully decided. The value currently available
         are:
 
         - ADDED: the files is new in both parents
         - REMOVED: the files existed in one parent and is getting removed
         - MODIFIED: the files existed in at least one parent and is getting changed
     """
 
     ALL_ACTIONS = weakref.WeakSet()
     NO_OP_ACTIONS = weakref.WeakSet()
 
     def __init__(self, short, no_op=False, narrow_safe=False, changes=None):
         self._short = short
         self.ALL_ACTIONS.add(self)
         self.no_op = no_op
         if self.no_op:
             self.NO_OP_ACTIONS.add(self)
         self.narrow_safe = narrow_safe
         self.changes = changes
 
     def __hash__(self):
         return hash(self._short)
 
     def __repr__(self):
         return 'MergeAction<%s>' % self._short.decode('ascii')
 
     def __bytes__(self):
         return self._short
 
     def __eq__(self, other):
         if other is None:
             return False
         assert isinstance(other, MergeAction)
         return self._short == other._short
 
     def __lt__(self, other):
         return self._short < other._short
 
 
 ACTION_FORGET = MergeAction(b'f', narrow_safe=True, changes=CHANGE_REMOVED)
 ACTION_REMOVE = MergeAction(b'r', narrow_safe=True, changes=CHANGE_REMOVED)
 ACTION_ADD = MergeAction(b'a', narrow_safe=True, changes=CHANGE_ADDED)
 ACTION_GET = MergeAction(b'g', narrow_safe=True, changes=CHANGE_MODIFIED)
 ACTION_PATH_CONFLICT = MergeAction(b'p')
 ACTION_PATH_CONFLICT_RESOLVE = MergeAction('pr')
 ACTION_ADD_MODIFIED = MergeAction(
     b'am', narrow_safe=True, changes=CHANGE_ADDED
 )  # not 100% about the changes value here
 ACTION_CREATED = MergeAction(b'c', narrow_safe=True, changes=CHANGE_ADDED)
 ACTION_DELETED_CHANGED = MergeAction(b'dc')
 ACTION_CHANGED_DELETED = MergeAction(b'cd')
 ACTION_MERGE = MergeAction(b'm')
 ACTION_LOCAL_DIR_RENAME_GET = MergeAction(b'dg')
 ACTION_DIR_RENAME_MOVE_LOCAL = MergeAction(b'dm')
 ACTION_KEEP = MergeAction(b'k', no_op=True)
 # the file was absent on local side before merge and we should
 # keep it absent (absent means file not present, it can be a result
 # of file deletion, rename etc.)
 ACTION_KEEP_ABSENT = MergeAction(b'ka', no_op=True)
 # the file is absent on the ancestor and remote side of the merge
 # hence this file is new and we should keep it
 ACTION_KEEP_NEW = MergeAction(b'kn', no_op=True)
 ACTION_EXEC = MergeAction(b'e', narrow_safe=True, changes=CHANGE_MODIFIED)
 ACTION_CREATED_MERGE = MergeAction(
     b'cm', narrow_safe=True, changes=CHANGE_ADDED
 )
 
 
 # Used by concert to detect situation it does not like, not sure what the exact
 # criteria is
 CONVERT_MERGE_ACTIONS = (
     ACTION_MERGE,
     ACTION_DIR_RENAME_MOVE_LOCAL,
     ACTION_CHANGED_DELETED,
     ACTION_DELETED_CHANGED,
 )
 
 
 class _mergestate_base(object):
     """track 3-way merge state of individual files
 
     The merge state is stored on disk when needed. Two files are used: one with
     an old format (version 1), and one with a new format (version 2). Version 2
     stores a superset of the data in version 1, including new kinds of records
     in the future. For more about the new format, see the documentation for
     `_readrecordsv2`.
 
     Each record can contain arbitrary content, and has an associated type. This
     `type` should be a letter. If `type` is uppercase, the record is mandatory:
     versions of Mercurial that don't support it should abort. If `type` is
     lowercase, the record can be safely ignored.
 
     Currently known records:
 
     L: the node of the "local" part of the merge (hexified version)
     O: the node of the "other" part of the merge (hexified version)
     F: a file to be merged entry
     C: a change/delete or delete/change conflict
     P: a path conflict (file vs directory)
     f: a (filename, dictionary) tuple of optional values for a given file
     l: the labels for the parts of the merge.
 
     Merge record states (stored in self._state, indexed by filename):
     u: unresolved conflict
     r: resolved conflict
     pu: unresolved path conflict (file conflicts with directory)
     pr: resolved path conflict
     o: file was merged in favor of other parent of merge (DEPRECATED)
 
     The resolve command transitions between 'u' and 'r' for conflicts and
     'pu' and 'pr' for path conflicts.
     """
 
     def __init__(self, repo):
         """Initialize the merge state.
 
         Do not use this directly! Instead call read() or clean()."""
         self._repo = repo
         self._state = {}
         self._stateextras = collections.defaultdict(dict)
         self._local = None
         self._other = None
         self._labels = None
         # contains a mapping of form:
         # {filename : (merge_return_value, action_to_be_performed}
         # these are results of re-running merge process
         # this dict is used to perform actions on dirstate caused by re-running
         # the merge
         self._results = {}
         self._dirty = False
 
     def reset(self):
         pass
 
     def start(self, node, other, labels=None):
         self._local = node
         self._other = other
         self._labels = labels
 
     @util.propertycache
     def local(self):
         if self._local is None:
             msg = b"local accessed but self._local isn't set"
             raise error.ProgrammingError(msg)
         return self._local
 
     @util.propertycache
     def localctx(self):
         return self._repo[self.local]
 
     @util.propertycache
     def other(self):
         if self._other is None:
             msg = b"other accessed but self._other isn't set"
             raise error.ProgrammingError(msg)
         return self._other
 
     @util.propertycache
     def otherctx(self):
         return self._repo[self.other]
 
     def active(self):
         """Whether mergestate is active.
 
         Returns True if there appears to be mergestate. This is a rough proxy
         for "is a merge in progress."
         """
         return bool(self._local) or bool(self._state)
 
     def commit(self):
         """Write current state on disk (if necessary)"""
 
     @staticmethod
     def getlocalkey(path):
         """hash the path of a local file context for storage in the .hg/merge
         directory."""
 
         return hex(hashutil.sha1(path).digest())
 
     def _make_backup(self, fctx, localkey):
         raise NotImplementedError()
 
     def _restore_backup(self, fctx, localkey, flags):
         raise NotImplementedError()
 
     def add(self, fcl, fco, fca, fd):
         """add a new (potentially?) conflicting file the merge state
         fcl: file context for local,
         fco: file context for remote,
         fca: file context for ancestors,
         fd:  file path of the resulting merge.
 
         note: also write the local version to the `.hg/merge` directory.
         """
         if fcl.isabsent():
             localkey = self._repo.nodeconstants.nullhex
         else:
             localkey = mergestate.getlocalkey(fcl.path())
             self._make_backup(fcl, localkey)
         self._state[fd] = [
             MERGE_RECORD_UNRESOLVED,
             localkey,
             fcl.path(),
             fca.path(),
             hex(fca.filenode()),
             fco.path(),
             hex(fco.filenode()),
             fcl.flags(),
         ]
         self._stateextras[fd][b'ancestorlinknode'] = hex(fca.node())
         self._dirty = True
 
     def addpathconflict(self, path, frename, forigin):
         """add a new conflicting path to the merge state
         path:    the path that conflicts
         frename: the filename the conflicting file was renamed to
         forigin: origin of the file ('l' or 'r' for local/remote)
         """
         self._state[path] = [MERGE_RECORD_UNRESOLVED_PATH, frename, forigin]
         self._dirty = True
 
     def addcommitinfo(self, path, data):
         """stores information which is required at commit
         into _stateextras"""
         self._stateextras[path].update(data)
         self._dirty = True
 
     def __contains__(self, dfile):
         return dfile in self._state
 
     def __getitem__(self, dfile):
         return self._state[dfile][0]
 
     def __iter__(self):
         return iter(sorted(self._state))
 
     def files(self):
         return self._state.keys()
 
     def mark(self, dfile, state):
         self._state[dfile][0] = state
         self._dirty = True
 
     def unresolved(self):
         """Obtain the paths of unresolved files."""
 
         for f, entry in pycompat.iteritems(self._state):
             if entry[0] in (
                 MERGE_RECORD_UNRESOLVED,
                 MERGE_RECORD_UNRESOLVED_PATH,
             ):
                 yield f
 
     def allextras(self):
         """return all extras information stored with the mergestate"""
         return self._stateextras
 
     def extras(self, filename):
         """return extras stored with the mergestate for the given filename"""
         return self._stateextras[filename]
 
     def resolve(self, dfile, wctx):
         """run merge process for dfile
 
         Returns the exit code of the merge."""
         if self[dfile] in (
             MERGE_RECORD_RESOLVED,
             LEGACY_RECORD_DRIVER_RESOLVED,
         ):
             return 0
         stateentry = self._state[dfile]
         state, localkey, lfile, afile, anode, ofile, onode, flags = stateentry
         octx = self._repo[self._other]
         extras = self.extras(dfile)
         anccommitnode = extras.get(b'ancestorlinknode')
         if anccommitnode:
             actx = self._repo[anccommitnode]
         else:
             actx = None
         fcd = _filectxorabsent(localkey, wctx, dfile)
         fco = _filectxorabsent(onode, octx, ofile)
         # TODO: move this to filectxorabsent
         fca = self._repo.filectx(afile, fileid=anode, changectx=actx)
         # "premerge" x flags
         flo = fco.flags()
         fla = fca.flags()
         if b'x' in flags + flo + fla and b'l' not in flags + flo + fla:
             if fca.rev() == nullrev and flags != flo:
                 self._repo.ui.warn(
                     _(
                         b'warning: cannot merge flags for %s '
                         b'without common ancestor - keeping local flags\n'
                     )
                     % afile
                 )
             elif flags == fla:
                 flags = flo
         # restore local
         if localkey != self._repo.nodeconstants.nullhex:
             self._restore_backup(wctx[dfile], localkey, flags)
         else:
             wctx[dfile].remove(ignoremissing=True)
+
+        if not fco.cmp(fcd):  # files identical?
+            # If return value of merge is None, then there are no real conflict
+            del self._state[dfile]
+            self._results[dfile] = None, None
+            self._dirty = True
+            return None
+
         merge_ret, deleted = filemerge.filemerge(
             self._repo,
             wctx,
             self._local,
             lfile,
             fcd,
             fco,
             fca,
             labels=self._labels,
         )
-        if merge_ret is None:
-            # If return value of merge is None, then there are no real conflict
-            del self._state[dfile]
-            self._results[dfile] = None, None
-            self._dirty = True
-            return None
 
         if not merge_ret:
             self.mark(dfile, MERGE_RECORD_RESOLVED)
 
         action = None
         if deleted:
             if fcd.isabsent():
                 # dc: local picked. Need to drop if present, which may
                 # happen on re-resolves.
                 action = ACTION_FORGET
             else:
                 # cd: remote picked (or otherwise deleted)
                 action = ACTION_REMOVE
         else:
             if fcd.isabsent():  # dc: remote picked
                 action = ACTION_GET
             elif fco.isabsent():  # cd: local picked
                 if dfile in self.localctx:
                     action = ACTION_ADD_MODIFIED
                 else:
                     action = ACTION_ADD
             # else: regular merges (no action necessary)
         self._results[dfile] = merge_ret, action
 
         return merge_ret
 
     def counts(self):
         """return counts for updated, merged and removed files in this
         session"""
         updated, merged, removed = 0, 0, 0
         for r, action in pycompat.itervalues(self._results):
             if r is None:
                 updated += 1
             elif r == 0:
                 if action == ACTION_REMOVE:
                     removed += 1
                 else:
                     merged += 1
         return updated, merged, removed
 
     def unresolvedcount(self):
         """get unresolved count for this merge (persistent)"""
         return len(list(self.unresolved()))
 
     def actions(self):
         """return lists of actions to perform on the dirstate"""
         actions = {
             ACTION_REMOVE: [],
             ACTION_FORGET: [],
             ACTION_ADD: [],
             ACTION_ADD_MODIFIED: [],
             ACTION_GET: [],
         }
         for f, (r, action) in pycompat.iteritems(self._results):
             if action is not None:
                 actions[action].append((f, None, b"merge result"))
         return actions
 
 
 class mergestate(_mergestate_base):
 
     statepathv1 = b'merge/state'
     statepathv2 = b'merge/state2'
 
     @staticmethod
     def clean(repo):
         """Initialize a brand new merge state, removing any existing state on
         disk."""
         ms = mergestate(repo)
         ms.reset()
         return ms
 
     @staticmethod
     def read(repo):
         """Initialize the merge state, reading it from disk."""
         ms = mergestate(repo)
         ms._read()
         return ms
 
     def _read(self):
         """Analyse each record content to restore a serialized state from disk
 
         This function process "record" entry produced by the de-serialization
         of on disk file.
         """
         unsupported = set()
         records = self._readrecords()
         for rtype, record in records:
             if rtype == RECORD_LOCAL:
                 self._local = bin(record)
             elif rtype == RECORD_OTHER:
                 self._other = bin(record)
             elif rtype == LEGACY_MERGE_DRIVER_STATE:
                 pass
             elif rtype in (
                 RECORD_MERGED,
                 RECORD_CHANGEDELETE_CONFLICT,
                 RECORD_PATH_CONFLICT,
                 LEGACY_MERGE_DRIVER_MERGE,
                 LEGACY_RECORD_RESOLVED_OTHER,
             ):
                 bits = record.split(b'\0')
                 # merge entry type MERGE_RECORD_MERGED_OTHER is deprecated
                 # and we now store related information in _stateextras, so
                 # lets write to _stateextras directly
                 if bits[1] == MERGE_RECORD_MERGED_OTHER:
                     self._stateextras[bits[0]][b'filenode-source'] = b'other'
                 else:
                     self._state[bits[0]] = bits[1:]
             elif rtype == RECORD_FILE_VALUES:
                 filename, rawextras = record.split(b'\0', 1)
                 extraparts = rawextras.split(b'\0')
                 extras = {}
                 i = 0
                 while i < len(extraparts):
                     extras[extraparts[i]] = extraparts[i + 1]
                     i += 2
 
                 self._stateextras[filename] = extras
             elif rtype == RECORD_LABELS:
                 labels = record.split(b'\0', 2)
                 self._labels = [l for l in labels if len(l) > 0]
             elif not rtype.islower():
                 unsupported.add(rtype)
 
         if unsupported:
             raise error.UnsupportedMergeRecords(unsupported)
 
     def _readrecords(self):
         """Read merge state from disk and return a list of record (TYPE, data)
 
         We read data from both v1 and v2 files and decide which one to use.
 
         V1 has been used by version prior to 2.9.1 and contains less data than
         v2. We read both versions and check if no data in v2 contradicts
         v1. If there is not contradiction we can safely assume that both v1
         and v2 were written at the same time and use the extract data in v2. If
         there is contradiction we ignore v2 content as we assume an old version
         of Mercurial has overwritten the mergestate file and left an old v2
         file around.
 
         returns list of record [(TYPE, data), ...]"""
         v1records = self._readrecordsv1()
         v2records = self._readrecordsv2()
         if self._v1v2match(v1records, v2records):
             return v2records
         else:
             # v1 file is newer than v2 file, use it
             # we have to infer the "other" changeset of the merge
             # we cannot do better than that with v1 of the format
             mctx = self._repo[None].parents()[-1]
             v1records.append((RECORD_OTHER, mctx.hex()))
             # add place holder "other" file node information
             # nobody is using it yet so we do no need to fetch the data
             # if mctx was wrong `mctx[bits[-2]]` may fails.
             for idx, r in enumerate(v1records):
                 if r[0] == RECORD_MERGED:
                     bits = r[1].split(b'\0')
                     bits.insert(-2, b'')
                     v1records[idx] = (r[0], b'\0'.join(bits))
             return v1records
 
     def _v1v2match(self, v1records, v2records):
         oldv2 = set()  # old format version of v2 record
         for rec in v2records:
             if rec[0] == RECORD_LOCAL:
                 oldv2.add(rec)
             elif rec[0] == RECORD_MERGED:
                 # drop the onode data (not contained in v1)
                 oldv2.add((RECORD_MERGED, _droponode(rec[1])))
         for rec in v1records:
             if rec not in oldv2:
                 return False
         else:
             return True
 
     def _readrecordsv1(self):
         """read on disk merge state for version 1 file
 
         returns list of record [(TYPE, data), ...]
 
         Note: the "F" data from this file are one entry short
               (no "other file node" entry)
         """
         records = []
         try:
             f = self._repo.vfs(self.statepathv1)
             for i, l in enumerate(f):
                 if i == 0:
                     records.append((RECORD_LOCAL, l[:-1]))
                 else:
                     records.append((RECORD_MERGED, l[:-1]))
             f.close()
         except IOError as err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     def _readrecordsv2(self):
         """read on disk merge state for version 2 file
 
         This format is a list of arbitrary records of the form:
 
           [type][length][content]
 
         `type` is a single character, `length` is a 4 byte integer, and
         `content` is an arbitrary byte sequence of length `length`.
 
         Mercurial versions prior to 3.7 have a bug where if there are
         unsupported mandatory merge records, attempting to clear out the merge
         state with hg update --clean or similar aborts. The 't' record type
         works around that by writing out what those versions treat as an
         advisory record, but later versions interpret as special: the first
         character is the 'real' record type and everything onwards is the data.
 
         Returns list of records [(TYPE, data), ...]."""
         records = []
         try:
             f = self._repo.vfs(self.statepathv2)
             data = f.read()
             off = 0
             end = len(data)
             while off < end:
                 rtype = data[off : off + 1]
                 off += 1
                 length = _unpack(b'>I', data[off : (off + 4)])[0]
                 off += 4
                 record = data[off : (off + length)]
                 off += length
                 if rtype == RECORD_OVERRIDE:
                     rtype, record = record[0:1], record[1:]
                 records.append((rtype, record))
             f.close()
         except IOError as err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     def commit(self):
         if self._dirty:
             records = self._makerecords()
             self._writerecords(records)
             self._dirty = False
 
     def _makerecords(self):
         records = []
         records.append((RECORD_LOCAL, hex(self._local)))
         records.append((RECORD_OTHER, hex(self._other)))
         # Write out state items. In all cases, the value of the state map entry
         # is written as the contents of the record. The record type depends on
         # the type of state that is stored, and capital-letter records are used
         # to prevent older versions of Mercurial that do not support the feature
         # from loading them.
         for filename, v in pycompat.iteritems(self._state):
             if v[0] in (
                 MERGE_RECORD_UNRESOLVED_PATH,
                 MERGE_RECORD_RESOLVED_PATH,
             ):
                 # Path conflicts. These are stored in 'P' records.  The current
                 # resolution state ('pu' or 'pr') is stored within the record.
                 records.append(
                     (RECORD_PATH_CONFLICT, b'\0'.join([filename] + v))
                 )
             elif (
                 v[1] == self._repo.nodeconstants.nullhex
                 or v[6] == self._repo.nodeconstants.nullhex
             ):
                 # Change/Delete or Delete/Change conflicts. These are stored in
                 # 'C' records. v[1] is the local file, and is nullhex when the
                 # file is deleted locally ('dc'). v[6] is the remote file, and
                 # is nullhex when the file is deleted remotely ('cd').
                 records.append(
                     (RECORD_CHANGEDELETE_CONFLICT, b'\0'.join([filename] + v))
                 )
             else:
                 # Normal files.  These are stored in 'F' records.
                 records.append((RECORD_MERGED, b'\0'.join([filename] + v)))
         for filename, extras in sorted(pycompat.iteritems(self._stateextras)):
             rawextras = b'\0'.join(
                 b'%s\0%s' % (k, v) for k, v in pycompat.iteritems(extras)
             )
             records.append(
                 (RECORD_FILE_VALUES, b'%s\0%s' % (filename, rawextras))
             )
         if self._labels is not None:
             labels = b'\0'.join(self._labels)
             records.append((RECORD_LABELS, labels))
         return records
 
     def _writerecords(self, records):
         """Write current state on disk (both v1 and v2)"""
         self._writerecordsv1(records)
         self._writerecordsv2(records)
 
     def _writerecordsv1(self, records):
         """Write current state on disk in a version 1 file"""
         f = self._repo.vfs(self.statepathv1, b'wb')
         irecords = iter(records)
         lrecords = next(irecords)
         assert lrecords[0] == RECORD_LOCAL
         f.write(hex(self._local) + b'\n')
         for rtype, data in irecords:
             if rtype == RECORD_MERGED:
                 f.write(b'%s\n' % _droponode(data))
         f.close()
 
     def _writerecordsv2(self, records):
         """Write current state on disk in a version 2 file
 
         See the docstring for _readrecordsv2 for why we use 't'."""
         # these are the records that all version 2 clients can read
         allowlist = (RECORD_LOCAL, RECORD_OTHER, RECORD_MERGED)
         f = self._repo.vfs(self.statepathv2, b'wb')
         for key, data in records:
             assert len(key) == 1
             if key not in allowlist:
                 key, data = RECORD_OVERRIDE, b'%s%s' % (key, data)
             format = b'>sI%is' % len(data)
             f.write(_pack(format, key, len(data), data))
         f.close()
 
     def _make_backup(self, fctx, localkey):
         self._repo.vfs.write(b'merge/' + localkey, fctx.data())
 
     def _restore_backup(self, fctx, localkey, flags):
         with self._repo.vfs(b'merge/' + localkey) as f:
             fctx.write(f.read(), flags)
 
     def reset(self):
         shutil.rmtree(self._repo.vfs.join(b'merge'), True)
 
 
 class memmergestate(_mergestate_base):
     def __init__(self, repo):
         super(memmergestate, self).__init__(repo)
         self._backups = {}
 
     def _make_backup(self, fctx, localkey):
         self._backups[localkey] = fctx.data()
 
     def _restore_backup(self, fctx, localkey, flags):
         fctx.write(self._backups[localkey], flags)
 
 
 def recordupdates(repo, actions, branchmerge, getfiledata):
     """record merge actions to the dirstate"""
     # remove (must come first)
     for f, args, msg in actions.get(ACTION_REMOVE, []):
         if branchmerge:
             repo.dirstate.update_file(f, p1_tracked=True, wc_tracked=False)
         else:
             repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=False)
 
     # forget (must come first)
     for f, args, msg in actions.get(ACTION_FORGET, []):
         repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=False)
 
     # resolve path conflicts
     for f, args, msg in actions.get(ACTION_PATH_CONFLICT_RESOLVE, []):
         (f0, origf0) = args
         repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
         repo.dirstate.copy(origf0, f)
         if f0 == origf0:
             repo.dirstate.update_file(f0, p1_tracked=True, wc_tracked=False)
         else:
             repo.dirstate.update_file(f0, p1_tracked=False, wc_tracked=False)
 
     # re-add
     for f, args, msg in actions.get(ACTION_ADD, []):
         repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
 
     # re-add/mark as modified
     for f, args, msg in actions.get(ACTION_ADD_MODIFIED, []):
         if branchmerge:
             repo.dirstate.update_file(
                 f, p1_tracked=True, wc_tracked=True, possibly_dirty=True
             )
         else:
             repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
 
     # exec change
     for f, args, msg in actions.get(ACTION_EXEC, []):
         repo.dirstate.update_file(
             f, p1_tracked=True, wc_tracked=True, possibly_dirty=True
         )
 
     # keep
     for f, args, msg in actions.get(ACTION_KEEP, []):
         pass
 
     # keep deleted
     for f, args, msg in actions.get(ACTION_KEEP_ABSENT, []):
         pass
 
     # keep new
     for f, args, msg in actions.get(ACTION_KEEP_NEW, []):
         pass
 
     # get
     for f, args, msg in actions.get(ACTION_GET, []):
         if branchmerge:
             # tracked in p1 can be True also but update_file should not care
             old_entry = repo.dirstate.get_entry(f)
             p1_tracked = old_entry.any_tracked and not old_entry.added
             repo.dirstate.update_file(
                 f,
                 p1_tracked=p1_tracked,
                 wc_tracked=True,
                 p2_info=True,
             )
         else:
             parentfiledata = getfiledata[f] if getfiledata else None
             repo.dirstate.update_file(
                 f,
                 p1_tracked=True,
                 wc_tracked=True,
                 parentfiledata=parentfiledata,
             )
 
     # merge
     for f, args, msg in actions.get(ACTION_MERGE, []):
         f1, f2, fa, move, anc = args
         if branchmerge:
             # We've done a branch merge, mark this file as merged
             # so that we properly record the merger later
             p1_tracked = f1 == f
             repo.dirstate.update_file(
                 f,
                 p1_tracked=p1_tracked,
                 wc_tracked=True,
                 p2_info=True,
             )
             if f1 != f2:  # copy/rename
                 if move:
                     repo.dirstate.update_file(
                         f1, p1_tracked=True, wc_tracked=False
                     )
                 if f1 != f:
                     repo.dirstate.copy(f1, f)
                 else:
                     repo.dirstate.copy(f2, f)
         else:
             # We've update-merged a locally modified file, so
             # we set the dirstate to emulate a normal checkout
             # of that file some time in the past. Thus our
             # merge will appear as a normal local file
             # modification.
             if f2 == f:  # file not locally copied/moved
                 repo.dirstate.update_file(
                     f, p1_tracked=True, wc_tracked=True, possibly_dirty=True
                 )
             if move:
                 repo.dirstate.update_file(
                     f1, p1_tracked=False, wc_tracked=False
                 )
 
     # directory rename, move local
     for f, args, msg in actions.get(ACTION_DIR_RENAME_MOVE_LOCAL, []):
         f0, flag = args
         if branchmerge:
             repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
             repo.dirstate.update_file(f0, p1_tracked=True, wc_tracked=False)
             repo.dirstate.copy(f0, f)
         else:
             repo.dirstate.update_file(f, p1_tracked=True, wc_tracked=True)
             repo.dirstate.update_file(f0, p1_tracked=False, wc_tracked=False)
 
     # directory rename, get
     for f, args, msg in actions.get(ACTION_LOCAL_DIR_RENAME_GET, []):
         f0, flag = args
         if branchmerge:
             repo.dirstate.update_file(f, p1_tracked=False, wc_tracked=True)
             repo.dirstate.copy(f0, f)
         else:
             repo.dirstate.update_file(f, p1_tracked=True, wc_tracked=True)

tests/test-largefiles-misc.t

@@ -1,1316 +1,1316 b''
 This file contains testcases that tend to be related to special cases or less
 common commands affecting largefile.
 
   $ hg init requirements
   $ cd requirements
 
 # largefiles not loaded by default.
 
   $ hg config extensions
   [1]
 
 # Adding largefiles to requires file will auto-load largefiles extension.
 
   $ echo largefiles >> .hg/requires
   $ hg config extensions
   extensions.largefiles=
 
 # But only if there is no config entry for the extension already.
 
   $ cat > .hg/hgrc << EOF
   > [extensions]
   > largefiles=!
   > EOF
 
   $ hg config extensions
   abort: repository requires features unknown to this Mercurial: largefiles
   (see https://mercurial-scm.org/wiki/MissingRequirement for more information)
   [255]
 
   $ cat > .hg/hgrc << EOF
   > [extensions]
   > largefiles=
   > EOF
 
   $ hg config extensions
   extensions.largefiles=
 
   $ cat > .hg/hgrc << EOF
   > [extensions]
   > largefiles = missing.py
   > EOF
 
   $ hg config extensions
   \*\*\* failed to import extension "largefiles" from missing.py: [Errno *] $ENOENT$: 'missing.py' (glob)
   abort: repository requires features unknown to this Mercurial: largefiles
   (see https://mercurial-scm.org/wiki/MissingRequirement for more information)
   [255]
 
   $ cd ..
 
 Each sections should be independent of each others.
 
   $ USERCACHE="$TESTTMP/cache"; export USERCACHE
   $ mkdir "${USERCACHE}"
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > largefiles=
   > purge=
   > rebase=
   > transplant=
   > [phases]
   > publish=False
   > [largefiles]
   > minsize=2
   > patterns=glob:**.dat
   > usercache=${USERCACHE}
   > [hooks]
   > precommit=sh -c "echo \\"Invoking status precommit hook\\"; hg status"
   > EOF
 
 
 
 Test copies and moves from a directory other than root (issue3516)
 =========================================================================
 
   $ hg init lf_cpmv
   $ cd lf_cpmv
   $ mkdir dira
   $ mkdir dira/dirb
   $ touch dira/dirb/largefile
   $ hg add --large dira/dirb/largefile
   $ hg commit -m "added"
   Invoking status precommit hook
   A dira/dirb/largefile
   $ cd dira
   $ hg cp dirb/largefile foo/largefile
 
 TODO: Ideally, this should mention the largefile, not the standin
   $ hg log -T '{rev}\n' --stat 'set:clean()'
   0
    .hglf/dira/dirb/largefile |  1 +
    1 files changed, 1 insertions(+), 0 deletions(-)
   
   $ hg ci -m "deep copy"
   Invoking status precommit hook
   A dira/foo/largefile
   $ find . | sort
   .
   ./dirb
   ./dirb/largefile
   ./foo
   ./foo/largefile
   $ hg mv foo/largefile baz/largefile
   $ hg ci -m "moved"
   Invoking status precommit hook
   A dira/baz/largefile
   R dira/foo/largefile
   $ find . | sort
   .
   ./baz
   ./baz/largefile
   ./dirb
   ./dirb/largefile
   $ cd ..
   $ hg mv dira dirc
   moving .hglf/dira/baz/largefile to .hglf/dirc/baz/largefile
   moving .hglf/dira/dirb/largefile to .hglf/dirc/dirb/largefile
   $ find * | sort
   dirc
   dirc/baz
   dirc/baz/largefile
   dirc/dirb
   dirc/dirb/largefile
 
   $ hg clone -q . ../fetch
   $ hg --config extensions.fetch= fetch ../fetch
   abort: uncommitted changes
   [20]
   $ hg up -qC
   $ cd ..
 
 Clone a local repository owned by another user
 ===================================================
 
 #if unix-permissions
 
 We have to simulate that here by setting $HOME and removing write permissions
   $ ORIGHOME="$HOME"
   $ mkdir alice
   $ HOME="`pwd`/alice"
   $ cd alice
   $ hg init pubrepo
   $ cd pubrepo
   $ dd if=/dev/zero bs=1k count=11k > a-large-file 2> /dev/null
   $ hg add --large a-large-file
   $ hg commit -m "Add a large file"
   Invoking status precommit hook
   A a-large-file
   $ cd ..
   $ chmod -R a-w pubrepo
   $ cd ..
   $ mkdir bob
   $ HOME="`pwd`/bob"
   $ cd bob
   $ hg clone --pull ../alice/pubrepo pubrepo
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets 09a186cfa6da (1 drafts)
   updating to branch default
   getting changed largefiles
   1 largefiles updated, 0 removed
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd ..
   $ chmod -R u+w alice/pubrepo
   $ HOME="$ORIGHOME"
 
 #endif
 
 
 Symlink to a large largefile should behave the same as a symlink to a normal file
 =====================================================================================
 
 #if symlink
 
   $ hg init largesymlink
   $ cd largesymlink
   $ dd if=/dev/zero bs=1k count=10k of=largefile 2>/dev/null
   $ hg add --large largefile
   $ hg commit -m "commit a large file"
   Invoking status precommit hook
   A largefile
   $ ln -s largefile largelink
   $ hg add largelink
   $ hg commit -m "commit a large symlink"
   Invoking status precommit hook
   A largelink
   $ rm -f largelink
   $ hg up >/dev/null
   $ test -f largelink
   [1]
   $ test -L largelink
   [1]
   $ rm -f largelink # make next part of the test independent of the previous
   $ hg up -C >/dev/null
   $ test -f largelink
   $ test -L largelink
   $ cd ..
 
 #endif
 
 
 test for pattern matching on 'hg status':
 ==============================================
 
 
 to boost performance, largefiles checks whether specified patterns are
 related to largefiles in working directory (NOT to STANDIN) or not.
 
   $ hg init statusmatch
   $ cd statusmatch
 
   $ mkdir -p a/b/c/d
   $ echo normal > a/b/c/d/e.normal.txt
   $ hg add a/b/c/d/e.normal.txt
   $ echo large > a/b/c/d/e.large.txt
   $ hg add --large a/b/c/d/e.large.txt
   $ mkdir -p a/b/c/x
   $ echo normal > a/b/c/x/y.normal.txt
   $ hg add a/b/c/x/y.normal.txt
   $ hg commit -m 'add files'
   Invoking status precommit hook
   A a/b/c/d/e.large.txt
   A a/b/c/d/e.normal.txt
   A a/b/c/x/y.normal.txt
 
 (1) no pattern: no performance boost
   $ hg status -A
   C a/b/c/d/e.large.txt
   C a/b/c/d/e.normal.txt
   C a/b/c/x/y.normal.txt
 
 (2) pattern not related to largefiles: performance boost
   $ hg status -A a/b/c/x
   C a/b/c/x/y.normal.txt
 
 (3) pattern related to largefiles: no performance boost
   $ hg status -A a/b/c/d
   C a/b/c/d/e.large.txt
   C a/b/c/d/e.normal.txt
 
 (4) pattern related to STANDIN (not to largefiles): performance boost
   $ hg status -A .hglf/a
   C .hglf/a/b/c/d/e.large.txt
 
 (5) mixed case: no performance boost
   $ hg status -A a/b/c/x a/b/c/d
   C a/b/c/d/e.large.txt
   C a/b/c/d/e.normal.txt
   C a/b/c/x/y.normal.txt
 
 verify that largefiles doesn't break filesets
 
   $ hg log --rev . --exclude "set:binary()"
   changeset:   0:41bd42f10efa
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     add files
   
 sharing a largefile repo automatically enables largefiles on the share
 
   $ hg share --config extensions.share= . ../shared_lfrepo
   updating working directory
   getting changed largefiles
   1 largefiles updated, 0 removed
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg debugrequires -R ../shared_lfrepo | grep largefiles
   largefiles
 
 verify that large files in subrepos handled properly
   $ hg init subrepo
   $ echo "subrepo = subrepo" > .hgsub
   $ hg add .hgsub
   $ hg ci -m "add subrepo"
   Invoking status precommit hook
   A .hgsub
   ? .hgsubstate
   $ echo "rev 1" > subrepo/large.txt
   $ hg add --large subrepo/large.txt
   $ hg sum
   parent: 1:8ee150ea2e9c tip
    add subrepo
   branch: default
   commit: 1 subrepos
   update: (current)
   phases: 2 draft
   $ hg st
   $ hg st -S
   A subrepo/large.txt
   $ hg ci -S -m "commit top repo"
   committing subrepository subrepo
   Invoking status precommit hook
   A large.txt
   Invoking status precommit hook
   M .hgsubstate
 # No differences
   $ hg st -S
   $ hg sum
   parent: 2:ce4cd0c527a6 tip
    commit top repo
   branch: default
   commit: (clean)
   update: (current)
   phases: 3 draft
   $ echo "rev 2" > subrepo/large.txt
   $ hg st -S
   M subrepo/large.txt
   $ hg sum
   parent: 2:ce4cd0c527a6 tip
    commit top repo
   branch: default
   commit: 1 subrepos
   update: (current)
   phases: 3 draft
   $ hg ci -m "this commit should fail without -S"
   abort: uncommitted changes in subrepository "subrepo"
   (use --subrepos for recursive commit)
   [255]
 
 Add a normal file to the subrepo, then test archiving
 
   $ echo 'normal file' > subrepo/normal.txt
   $ touch large.dat
   $ mv subrepo/large.txt subrepo/renamed-large.txt
   $ hg addremove -S --dry-run
   adding large.dat as a largefile
   removing subrepo/large.txt
   adding subrepo/normal.txt
   adding subrepo/renamed-large.txt
   $ hg status -S
   ! subrepo/large.txt
   ? large.dat
   ? subrepo/normal.txt
   ? subrepo/renamed-large.txt
 
   $ hg addremove --dry-run subrepo
   removing subrepo/large.txt
   adding subrepo/normal.txt
   adding subrepo/renamed-large.txt
   $ hg status -S
   ! subrepo/large.txt
   ? large.dat
   ? subrepo/normal.txt
   ? subrepo/renamed-large.txt
   $ cd ..
 
   $ hg -R statusmatch addremove --dry-run statusmatch/subrepo
   removing statusmatch/subrepo/large.txt
   adding statusmatch/subrepo/normal.txt
   adding statusmatch/subrepo/renamed-large.txt
   $ hg -R statusmatch status -S
   ! subrepo/large.txt
   ? large.dat
   ? subrepo/normal.txt
   ? subrepo/renamed-large.txt
 
   $ hg -R statusmatch addremove --dry-run -S
   adding large.dat as a largefile
   removing subrepo/large.txt
   adding subrepo/normal.txt
   adding subrepo/renamed-large.txt
   $ cd statusmatch
 
   $ mv subrepo/renamed-large.txt subrepo/large.txt
   $ hg addremove subrepo
   adding subrepo/normal.txt
   $ hg forget subrepo/normal.txt
 
   $ hg addremove -S
   adding large.dat as a largefile
   adding subrepo/normal.txt
   $ rm large.dat
 
   $ hg addremove subrepo
   $ hg addremove -S
   removing large.dat
 
 Lock in subrepo, otherwise the change isn't archived
 
   $ hg ci -S -m "add normal file to top level"
   committing subrepository subrepo
   Invoking status precommit hook
   M large.txt
   A normal.txt
   Invoking status precommit hook
   M .hgsubstate
   $ hg archive -S ../lf_subrepo_archive
   $ find ../lf_subrepo_archive | sort
   ../lf_subrepo_archive
   ../lf_subrepo_archive/.hg_archival.txt
   ../lf_subrepo_archive/.hgsub
   ../lf_subrepo_archive/.hgsubstate
   ../lf_subrepo_archive/a
   ../lf_subrepo_archive/a/b
   ../lf_subrepo_archive/a/b/c
   ../lf_subrepo_archive/a/b/c/d
   ../lf_subrepo_archive/a/b/c/d/e.large.txt
   ../lf_subrepo_archive/a/b/c/d/e.normal.txt
   ../lf_subrepo_archive/a/b/c/x
   ../lf_subrepo_archive/a/b/c/x/y.normal.txt
   ../lf_subrepo_archive/subrepo
   ../lf_subrepo_archive/subrepo/large.txt
   ../lf_subrepo_archive/subrepo/normal.txt
   $ cat ../lf_subrepo_archive/.hg_archival.txt
   repo: 41bd42f10efa43698cc02052ea0977771cba506d
   node: d56a95e6522858bc08a724c4fe2bdee066d1c30b
   branch: default
   latesttag: null
   latesttagdistance: 4
   changessincelatesttag: 4
 
 Test update with subrepos.
 
   $ hg update 0
   getting changed largefiles
   0 largefiles updated, 1 removed
   0 files updated, 0 files merged, 2 files removed, 0 files unresolved
   $ hg status -S
   $ hg update tip
   getting changed largefiles
   1 largefiles updated, 0 removed
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg status -S
 # modify a large file
   $ echo "modified" > subrepo/large.txt
   $ hg st -S
   M subrepo/large.txt
 # update -C should revert the change.
   $ hg update -C
   getting changed largefiles
   1 largefiles updated, 0 removed
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg status -S
 
 Forget doesn't change the content of the file
   $ echo 'pre-forget content' > subrepo/large.txt
   $ hg forget -v subrepo/large.txt
   removing subrepo/large.txt
   $ cat subrepo/large.txt
   pre-forget content
 
 Test reverting a forgotten file
   $ hg revert -R subrepo subrepo/large.txt
   $ hg status -SA subrepo/large.txt
   C subrepo/large.txt
 
   $ hg rm -v subrepo/large.txt
   removing subrepo/large.txt
   $ hg revert -R subrepo subrepo/large.txt
   $ rm subrepo/large.txt
   $ hg addremove -S
   removing subrepo/large.txt
   $ hg st -S
   R subrepo/large.txt
 
 Test archiving a revision that references a subrepo that is not yet
 cloned (see test-subrepo-recursion.t):
 
   $ hg clone -U . ../empty
   $ cd ../empty
   $ hg archive --subrepos -r tip ../archive.tar.gz
   cloning subrepo subrepo from $TESTTMP/statusmatch/subrepo
   $ cd ..
 
 
 
 
 
 
 Test addremove, forget and others
 ==============================================
 
 Test that addremove picks up largefiles prior to the initial commit (issue3541)
 
   $ hg init addrm2
   $ cd addrm2
   $ touch large.dat
   $ touch large2.dat
   $ touch normal
   $ hg add --large large.dat
   $ hg addremove -v
   adding large2.dat as a largefile
   adding normal
 
 Test that forgetting all largefiles reverts to islfilesrepo() == False
 (addremove will add *.dat as normal files now)
   $ hg forget large.dat
   $ hg forget large2.dat
   $ hg addremove -v
   adding large.dat
   adding large2.dat
 
 Test commit's addremove option prior to the first commit
   $ hg forget large.dat
   $ hg forget large2.dat
   $ hg add --large large.dat
   $ hg ci -Am "commit"
   adding large2.dat as a largefile
   Invoking status precommit hook
   A large.dat
   A large2.dat
   A normal
   $ find .hglf | sort
   .hglf
   .hglf/large.dat
   .hglf/large2.dat
 
 Test actions on largefiles using relative paths from subdir
 
   $ mkdir sub
   $ cd sub
   $ echo anotherlarge > anotherlarge
   $ hg add --large anotherlarge
   $ hg st
   A sub/anotherlarge
   $ hg st anotherlarge
   A anotherlarge
   $ hg commit -m anotherlarge anotherlarge
   Invoking status precommit hook
   A sub/anotherlarge
   $ hg log anotherlarge
   changeset:   1:9627a577c5e9
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     anotherlarge
   
   $ hg --debug log -T '{rev}: {desc}\n' ../sub/anotherlarge
   updated patterns: ../.hglf/sub/../sub/anotherlarge, ../sub/anotherlarge
   1: anotherlarge
 
   $ hg log -G anotherlarge
   @  changeset:   1:9627a577c5e9
   |  tag:         tip
   ~  user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     anotherlarge
   
 
   $ hg log glob:another*
   changeset:   1:9627a577c5e9
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     anotherlarge
   
   $ hg --debug log -T '{rev}: {desc}\n' -G glob:another*
   updated patterns: glob:../.hglf/sub/another*, glob:another*
   @  1: anotherlarge
   |
   ~
 
 #if no-msys
   $ hg --debug log -T '{rev}: {desc}\n' 'glob:../.hglf/sub/another*' # no-msys
   updated patterns: glob:../.hglf/sub/another*
   1: anotherlarge
 
   $ hg --debug log -G -T '{rev}: {desc}\n' 'glob:../.hglf/sub/another*' # no-msys
   updated patterns: glob:../.hglf/sub/another*
   @  1: anotherlarge
   |
   ~
 #endif
 
   $ echo more >> anotherlarge
   $ hg st .
   M anotherlarge
   $ hg cat anotherlarge
   anotherlarge
   $ hg revert anotherlarge
   $ hg st
   ? sub/anotherlarge.orig
 
 Test orig files go where we want them
   $ echo moremore >> anotherlarge
   $ hg revert anotherlarge -v --config 'ui.origbackuppath=.hg/origbackups'
   creating directory: $TESTTMP/addrm2/.hg/origbackups/.hglf/sub
   saving current version of ../.hglf/sub/anotherlarge as ../.hg/origbackups/.hglf/sub/anotherlarge
   reverting ../.hglf/sub/anotherlarge
   creating directory: $TESTTMP/addrm2/.hg/origbackups/sub
   found 90c622cf65cebe75c5842f9136c459333faf392e in store
   found 90c622cf65cebe75c5842f9136c459333faf392e in store
   $ ls ../.hg/origbackups/sub
   anotherlarge
   $ cd ..
 
 Test glob logging from the root dir
   $ hg log glob:**another*
   changeset:   1:9627a577c5e9
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     anotherlarge
   
   $ hg log -G glob:**another*
   @  changeset:   1:9627a577c5e9
   |  tag:         tip
   ~  user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     anotherlarge
   
 
   $ cd ..
 
 Log from outer space
   $ hg --debug log -R addrm2 -T '{rev}: {desc}\n' 'addrm2/sub/anotherlarge'
   updated patterns: addrm2/.hglf/sub/anotherlarge, addrm2/sub/anotherlarge
   1: anotherlarge
   $ hg --debug log -R addrm2 -T '{rev}: {desc}\n' 'addrm2/.hglf/sub/anotherlarge'
   updated patterns: addrm2/.hglf/sub/anotherlarge
   1: anotherlarge
 
 
 Check error message while exchange
 =========================================================
 
 issue3651: summary/outgoing with largefiles shows "no remote repo"
 unexpectedly
 
   $ mkdir issue3651
   $ cd issue3651
 
   $ hg init src
   $ echo a > src/a
   $ hg -R src add --large src/a
   $ hg -R src commit -m '#0'
   Invoking status precommit hook
   A a
 
 check messages when no remote repository is specified:
 "no remote repo" route for "hg outgoing --large" is not tested here,
 because it can't be reproduced easily.
 
   $ hg init clone1
   $ hg -R clone1 -q pull src
   $ hg -R clone1 -q update
   $ hg -R clone1 paths | grep default
   [1]
 
   $ hg -R clone1 summary --large
   parent: 0:fc0bd45326d3 tip
    #0
   branch: default
   commit: (clean)
   update: (current)
   phases: 1 draft
   largefiles: (no remote repo)
 
 check messages when there is no files to upload:
 
   $ hg -q clone src clone2
   $ hg -R clone2 paths | grep default
   default = $TESTTMP/issue3651/src
 
   $ hg -R clone2 summary --large
   parent: 0:fc0bd45326d3 tip
    #0
   branch: default
   commit: (clean)
   update: (current)
   phases: 1 draft
   largefiles: (no files to upload)
   $ hg -R clone2 outgoing --large
   comparing with $TESTTMP/issue3651/src
   searching for changes
   no changes found
   largefiles: no files to upload
   [1]
 
   $ hg -R clone2 outgoing --large --graph --template "{rev}"
   comparing with $TESTTMP/issue3651/src
   searching for changes
   no changes found
   largefiles: no files to upload
   [1]
 
 check messages when there are files to upload:
 
   $ echo b > clone2/b
   $ hg -R clone2 add --large clone2/b
   $ hg -R clone2 commit -m '#1'
   Invoking status precommit hook
   A b
   $ hg -R clone2 summary --large
   parent: 1:1acbe71ce432 tip
    #1
   branch: default
   commit: (clean)
   update: (current)
   phases: 2 draft
   largefiles: 1 entities for 1 files to upload
   $ hg -R clone2 outgoing --large
   comparing with $TESTTMP/issue3651/src
   searching for changes
   changeset:   1:1acbe71ce432
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     #1
   
   largefiles to upload (1 entities):
   b
   
   $ hg -R clone2 outgoing --large --graph --template "{rev}"
   comparing with $TESTTMP/issue3651/src
   searching for changes
   @  1
   
   largefiles to upload (1 entities):
   b
   
 
   $ cp clone2/b clone2/b1
   $ cp clone2/b clone2/b2
   $ hg -R clone2 add --large clone2/b1 clone2/b2
   $ hg -R clone2 commit -m '#2: add largefiles referring same entity'
   Invoking status precommit hook
   A b1
   A b2
   $ hg -R clone2 summary --large
   parent: 2:6095d0695d70 tip
    #2: add largefiles referring same entity
   branch: default
   commit: (clean)
   update: (current)
   phases: 3 draft
   largefiles: 1 entities for 3 files to upload
   $ hg -R clone2 outgoing --large -T "{rev}:{node|short}\n"
   comparing with $TESTTMP/issue3651/src
   searching for changes
   1:1acbe71ce432
   2:6095d0695d70
   largefiles to upload (1 entities):
   b
   b1
   b2
   
   $ hg -R clone2 cat -r 1 clone2/.hglf/b
   89e6c98d92887913cadf06b2adb97f26cde4849b
   $ hg -R clone2 outgoing --large -T "{rev}:{node|short}\n" --debug --config progress.debug=true
   comparing with $TESTTMP/issue3651/src
   query 1; heads
   searching for changes
   all remote heads known locally
   1:1acbe71ce432
   2:6095d0695d70
   finding outgoing largefiles: 0/2 revisions (0.00%)
   finding outgoing largefiles: 1/2 revisions (50.00%)
   largefiles to upload (1 entities):
   b
       89e6c98d92887913cadf06b2adb97f26cde4849b
   b1
       89e6c98d92887913cadf06b2adb97f26cde4849b
   b2
       89e6c98d92887913cadf06b2adb97f26cde4849b
   
 
   $ echo bbb > clone2/b
   $ hg -R clone2 commit -m '#3: add new largefile entity as existing file'
   Invoking status precommit hook
   M b
   $ echo bbbb > clone2/b
   $ hg -R clone2 commit -m '#4: add new largefile entity as existing file'
   Invoking status precommit hook
   M b
   $ cp clone2/b1 clone2/b
   $ hg -R clone2 commit -m '#5: refer existing largefile entity again'
   Invoking status precommit hook
   M b
   $ hg -R clone2 summary --large
   parent: 5:036794ea641c tip
    #5: refer existing largefile entity again
   branch: default
   commit: (clean)
   update: (current)
   phases: 6 draft
   largefiles: 3 entities for 3 files to upload
   $ hg -R clone2 outgoing --large -T "{rev}:{node|short}\n"
   comparing with $TESTTMP/issue3651/src
   searching for changes
   1:1acbe71ce432
   2:6095d0695d70
   3:7983dce246cc
   4:233f12ada4ae
   5:036794ea641c
   largefiles to upload (3 entities):
   b
   b1
   b2
   
   $ hg -R clone2 cat -r 3 clone2/.hglf/b
   c801c9cfe94400963fcb683246217d5db77f9a9a
   $ hg -R clone2 cat -r 4 clone2/.hglf/b
   13f9ed0898e315bf59dc2973fec52037b6f441a2
   $ hg -R clone2 outgoing --large -T "{rev}:{node|short}\n" --debug --config progress.debug=true
   comparing with $TESTTMP/issue3651/src
   query 1; heads
   searching for changes
   all remote heads known locally
   1:1acbe71ce432
   2:6095d0695d70
   3:7983dce246cc
   4:233f12ada4ae
   5:036794ea641c
   finding outgoing largefiles: 0/5 revisions (0.00%)
   finding outgoing largefiles: 1/5 revisions (20.00%)
   finding outgoing largefiles: 2/5 revisions (40.00%)
   finding outgoing largefiles: 3/5 revisions (60.00%)
   finding outgoing largefiles: 4/5 revisions (80.00%)
   largefiles to upload (3 entities):
   b
       13f9ed0898e315bf59dc2973fec52037b6f441a2
       89e6c98d92887913cadf06b2adb97f26cde4849b
       c801c9cfe94400963fcb683246217d5db77f9a9a
   b1
       89e6c98d92887913cadf06b2adb97f26cde4849b
   b2
       89e6c98d92887913cadf06b2adb97f26cde4849b
   
 
 Pushing revision #1 causes uploading entity 89e6c98d9288, which is
 shared also by largefiles b1, b2 in revision #2 and b in revision #5.
 
 Then, entity 89e6c98d9288 is not treated as "outgoing entity" at "hg
 summary" and "hg outgoing", even though files in outgoing revision #2
 and #5 refer it.
 
   $ hg -R clone2 push -r 1 -q
   $ hg -R clone2 summary --large
   parent: 5:036794ea641c tip
    #5: refer existing largefile entity again
   branch: default
   commit: (clean)
   update: (current)
   phases: 6 draft
   largefiles: 2 entities for 1 files to upload
   $ hg -R clone2 outgoing --large -T "{rev}:{node|short}\n"
   comparing with $TESTTMP/issue3651/src
   searching for changes
   2:6095d0695d70
   3:7983dce246cc
   4:233f12ada4ae
   5:036794ea641c
   largefiles to upload (2 entities):
   b
   
   $ hg -R clone2 outgoing --large -T "{rev}:{node|short}\n" --debug --config progress.debug=true
   comparing with $TESTTMP/issue3651/src
   query 1; heads
   searching for changes
   all remote heads known locally
   2:6095d0695d70
   3:7983dce246cc
   4:233f12ada4ae
   5:036794ea641c
   finding outgoing largefiles: 0/4 revisions (0.00%)
   finding outgoing largefiles: 1/4 revisions (25.00%)
   finding outgoing largefiles: 2/4 revisions (50.00%)
   finding outgoing largefiles: 3/4 revisions (75.00%)
   largefiles to upload (2 entities):
   b
       13f9ed0898e315bf59dc2973fec52037b6f441a2
       c801c9cfe94400963fcb683246217d5db77f9a9a
   
 
   $ cd ..
 
 merge action 'd' for 'local renamed directory to d2/g' which has no filename
 ==================================================================================
 
   $ hg init merge-action
   $ cd merge-action
   $ touch l
   $ hg add --large l
   $ mkdir d1
   $ touch d1/f
   $ hg ci -Aqm0
   Invoking status precommit hook
   A d1/f
   A l
   $ echo > d1/f
   $ touch d1/g
   $ hg ci -Aqm1
   Invoking status precommit hook
   M d1/f
   A d1/g
   $ hg up -qr0
   $ hg mv d1 d2
   moving d1/f to d2/f
   $ hg ci -qm2
   Invoking status precommit hook
   A d2/f
   R d1/f
   $ hg merge
   merging d2/f and d1/f to d2/f
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cd ..
 
 
 Merge conflicts:
 =====================
 
   $ hg init merge
   $ cd merge
   $ echo 0 > f-different
   $ echo 0 > f-same
   $ echo 0 > f-unchanged-1
   $ echo 0 > f-unchanged-2
   $ hg add --large *
   $ hg ci -m0
   Invoking status precommit hook
   A f-different
   A f-same
   A f-unchanged-1
   A f-unchanged-2
   $ echo tmp1 > f-unchanged-1
   $ echo tmp1 > f-unchanged-2
   $ echo tmp1 > f-same
   $ hg ci -m1
   Invoking status precommit hook
   M f-same
   M f-unchanged-1
   M f-unchanged-2
   $ echo 2 > f-different
   $ echo 0 > f-unchanged-1
   $ echo 1 > f-unchanged-2
   $ echo 1 > f-same
   $ hg ci -m2
   Invoking status precommit hook
   M f-different
   M f-same
   M f-unchanged-1
   M f-unchanged-2
   $ hg up -qr0
   $ echo tmp2 > f-unchanged-1
   $ echo tmp2 > f-unchanged-2
   $ echo tmp2 > f-same
   $ hg ci -m3
   Invoking status precommit hook
   M f-same
   M f-unchanged-1
   M f-unchanged-2
   created new head
   $ echo 1 > f-different
   $ echo 1 > f-unchanged-1
   $ echo 0 > f-unchanged-2
   $ echo 1 > f-same
   $ hg ci -m4
   Invoking status precommit hook
   M f-different
   M f-same
   M f-unchanged-1
   M f-unchanged-2
   $ hg merge
   largefile f-different has a merge conflict
   ancestor was 09d2af8dd22201dd8d48e5dcfcaed281ff9422c7
   you can keep (l)ocal e5fa44f2b31c1fb553b6021e7360d07d5d91ff5e or take (o)ther 7448d8798a4380162d4b56f9b452e2f6f9e24e7a.
   what do you want to do? l
   getting changed largefiles
   1 largefiles updated, 0 removed
-  0 files updated, 4 files merged, 0 files removed, 0 files unresolved
+  1 files updated, 3 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat f-different
   1
   $ cat f-same
   1
   $ cat f-unchanged-1
   1
   $ cat f-unchanged-2
   1
   $ cd ..
 
 Test largefile insulation (do not enabled a side effect
 ========================================================
 
 Check whether "largefiles" feature is supported only in repositories
 enabling largefiles extension.
 
   $ mkdir individualenabling
   $ cd individualenabling
 
   $ hg init enabledlocally
   $ echo large > enabledlocally/large
   $ hg -R enabledlocally add --large enabledlocally/large
   $ hg -R enabledlocally commit -m '#0'
   Invoking status precommit hook
   A large
 
   $ hg init notenabledlocally
   $ echo large > notenabledlocally/large
   $ hg -R notenabledlocally add --large notenabledlocally/large
   $ hg -R notenabledlocally commit -m '#0'
   Invoking status precommit hook
   A large
 
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
   > # disable globally
   > largefiles=!
   > EOF
   $ cat >> enabledlocally/.hg/hgrc <<EOF
   > [extensions]
   > # enable locally
   > largefiles=
   > EOF
   $ hg -R enabledlocally root
   $TESTTMP/individualenabling/enabledlocally
   $ hg -R notenabledlocally root
   abort: repository requires features unknown to this Mercurial: largefiles
   (see https://mercurial-scm.org/wiki/MissingRequirement for more information)
   [255]
 
   $ hg init push-dst
   $ hg -R enabledlocally push push-dst
   pushing to push-dst
   abort: required features are not supported in the destination: largefiles
   [255]
 
   $ hg init pull-src
   $ hg -R pull-src pull enabledlocally
   pulling from enabledlocally
   abort: required features are not supported in the destination: largefiles
   [255]
 
   $ hg clone enabledlocally clone-dst
   abort: repository requires features unknown to this Mercurial: largefiles
   (see https://mercurial-scm.org/wiki/MissingRequirement for more information)
   [255]
   $ test -d clone-dst
   [1]
   $ hg clone --pull enabledlocally clone-pull-dst
   abort: required features are not supported in the destination: largefiles
   [255]
   $ test -d clone-pull-dst
   [1]
 
 #if serve
 
 Test largefiles specific peer setup, when largefiles is enabled
 locally (issue4109)
 
   $ hg showconfig extensions | grep largefiles
   extensions.largefiles=!
   $ mkdir -p $TESTTMP/individualenabling/usercache
 
   $ hg serve -R enabledlocally -d -p $HGPORT --pid-file hg.pid
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ hg init pull-dst
   $ cat > pull-dst/.hg/hgrc <<EOF
   > [extensions]
   > # enable locally
   > largefiles=
   > [largefiles]
   > # ignore system cache to force largefiles specific wire proto access
   > usercache=$TESTTMP/individualenabling/usercache
   > EOF
   $ hg -R pull-dst -q pull -u http://localhost:$HGPORT
 
   $ killdaemons.py
 #endif
 
 Test overridden functions work correctly even for repos disabling
 largefiles (issue4547)
 
   $ hg showconfig extensions | grep largefiles
   extensions.largefiles=!
 
 (test updating implied by clone)
 
   $ hg init enabled-but-no-largefiles
   $ echo normal1 > enabled-but-no-largefiles/normal1
   $ hg -R enabled-but-no-largefiles add enabled-but-no-largefiles/normal1
   $ hg -R enabled-but-no-largefiles commit -m '#0@enabled-but-no-largefiles'
   Invoking status precommit hook
   A normal1
   $ cat >> enabled-but-no-largefiles/.hg/hgrc <<EOF
   > [extensions]
   > # enable locally
   > largefiles=
   > EOF
   $ hg clone -q enabled-but-no-largefiles no-largefiles
 
   $ echo normal2 > enabled-but-no-largefiles/normal2
   $ hg -R enabled-but-no-largefiles add enabled-but-no-largefiles/normal2
   $ hg -R enabled-but-no-largefiles commit -m '#1@enabled-but-no-largefiles'
   Invoking status precommit hook
   A normal2
 
   $ echo normal3 > no-largefiles/normal3
   $ hg -R no-largefiles add no-largefiles/normal3
   $ hg -R no-largefiles commit -m '#1@no-largefiles'
   Invoking status precommit hook
   A normal3
 
   $ hg -R no-largefiles -q pull --rebase
   Invoking status precommit hook
   A normal3
 
 (test reverting)
 
   $ hg init subrepo-root
   $ cat >> subrepo-root/.hg/hgrc <<EOF
   > [extensions]
   > # enable locally
   > largefiles=
   > EOF
   $ echo large > subrepo-root/large
   $ mkdir -p subrepo-root/dir/subdir
   $ echo large2 > subrepo-root/dir/subdir/large.bin
   $ hg -R subrepo-root add --large subrepo-root/large subrepo-root/dir/subdir/large.bin
   $ hg clone -q no-largefiles subrepo-root/no-largefiles
   $ cat > subrepo-root/.hgsub <<EOF
   > no-largefiles = no-largefiles
   > EOF
   $ hg -R subrepo-root add subrepo-root/.hgsub
   $ hg -R subrepo-root commit -m '#0'
   Invoking status precommit hook
   A .hgsub
   A dir/subdir/large.bin
   A large
   ? .hgsubstate
   $ echo dirty >> subrepo-root/large
   $ echo dirty >> subrepo-root/no-largefiles/normal1
   $ hg -R subrepo-root status -S
   M large
   M no-largefiles/normal1
   $ hg -R subrepo-root extdiff -p echo -S --config extensions.extdiff=
   "*\\no-largefiles\\normal1" "*\\no-largefiles\\normal1" (glob) (windows !)
   */no-largefiles/normal1 */no-largefiles/normal1 (glob) (no-windows !)
   [1]
   $ hg -R subrepo-root revert --all
   reverting subrepo-root/.hglf/large
   reverting subrepo no-largefiles
   reverting subrepo-root/no-largefiles/normal1
 
 Move (and then undo) a directory move with only largefiles.
 
   $ cd subrepo-root
   $ "$PYTHON" $TESTDIR/list-tree.py .hglf dir* large*
   .hglf/
   .hglf/dir/
   .hglf/dir/subdir/
   .hglf/dir/subdir/large.bin
   .hglf/large
   dir/
   dir/subdir/
   dir/subdir/large.bin
   large
   large.orig
 
   $ hg mv dir/subdir dir/subdir2
   moving .hglf/dir/subdir/large.bin to .hglf/dir/subdir2/large.bin
 
   $ "$PYTHON" $TESTDIR/list-tree.py .hglf dir* large*
   .hglf/
   .hglf/dir/
   .hglf/dir/subdir2/
   .hglf/dir/subdir2/large.bin
   .hglf/large
   dir/
   dir/subdir2/
   dir/subdir2/large.bin
   large
   large.orig
   $ hg status -C
   A dir/subdir2/large.bin
     dir/subdir/large.bin
   R dir/subdir/large.bin
   ? large.orig
 
   $ echo 'modified' > dir/subdir2/large.bin
   $ hg status -C
   A dir/subdir2/large.bin
     dir/subdir/large.bin
   R dir/subdir/large.bin
   ? large.orig
 
   $ hg revert --all
   forgetting .hglf/dir/subdir2/large.bin
   undeleting .hglf/dir/subdir/large.bin
   reverting subrepo no-largefiles
 
   $ hg status -C
   ? dir/subdir2/large.bin
   ? large.orig
 
 The content of the forgotten file shouldn't be clobbered
 
   $ cat dir/subdir2/large.bin
   modified
 
 The standin for subdir2 should be deleted, not just dropped
 
   $ "$PYTHON" $TESTDIR/list-tree.py .hglf dir* large*
   .hglf/
   .hglf/dir/
   .hglf/dir/subdir/
   .hglf/dir/subdir/large.bin
   .hglf/large
   dir/
   dir/subdir/
   dir/subdir/large.bin
   dir/subdir2/
   dir/subdir2/large.bin
   large
   large.orig
 
   $ rm -r dir/subdir2
 
 'subdir' should not be in the destination.  It would be if the subdir2 directory
 existed under .hglf/.
   $ hg mv dir/subdir dir/subdir2
   moving .hglf/dir/subdir/large.bin to .hglf/dir/subdir2/large.bin
 
   $ hg status -C
   A dir/subdir2/large.bin
     dir/subdir/large.bin
   R dir/subdir/large.bin
   ? large.orig
 
   $ "$PYTHON" $TESTDIR/list-tree.py .hglf dir* large*
   .hglf/
   .hglf/dir/
   .hglf/dir/subdir2/
   .hglf/dir/subdir2/large.bin
   .hglf/large
   dir/
   dir/subdir2/
   dir/subdir2/large.bin
   large
   large.orig
 
 Start from scratch, and rename something other than the final path component.
 
   $ hg up -qC .
   $ hg --config extensions.purge= purge
 
   $ hg mv dir/subdir dir2/subdir
   moving .hglf/dir/subdir/large.bin to .hglf/dir2/subdir/large.bin
 
   $ hg status -C
   A dir2/subdir/large.bin
     dir/subdir/large.bin
   R dir/subdir/large.bin
 
   $ "$PYTHON" $TESTDIR/list-tree.py .hglf dir* large*
   .hglf/
   .hglf/dir2/
   .hglf/dir2/subdir/
   .hglf/dir2/subdir/large.bin
   .hglf/large
   dir2/
   dir2/subdir/
   dir2/subdir/large.bin
   large
 
   $ hg revert --all
   forgetting .hglf/dir2/subdir/large.bin
   undeleting .hglf/dir/subdir/large.bin
   reverting subrepo no-largefiles
 
   $ hg status -C
   ? dir2/subdir/large.bin
 
   $ "$PYTHON" $TESTDIR/list-tree.py .hglf dir* large*
   .hglf/
   .hglf/dir/
   .hglf/dir/subdir/
   .hglf/dir/subdir/large.bin
   .hglf/large
   dir/
   dir/subdir/
   dir/subdir/large.bin
   dir2/
   dir2/subdir/
   dir2/subdir/large.bin
   large
 
   $ cd ../..
 
 Test "pull --rebase" when rebase is enabled before largefiles (issue3861)
 =========================================================================
 
   $ hg showconfig extensions | grep largefiles
   extensions.largefiles=!
 
   $ mkdir issue3861
   $ cd issue3861
   $ hg init src
   $ hg clone -q src dst
   $ echo a > src/a
   $ hg -R src commit -Aqm "#0"
   Invoking status precommit hook
   A a
 
   $ cat >> dst/.hg/hgrc <<EOF
   > [extensions]
   > largefiles=
   > EOF
   $ hg -R dst pull --rebase
   pulling from $TESTTMP/issue3861/src
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets bf5e395ced2c (1 drafts)
   nothing to rebase - updating instead
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ cd ..