undo-files: clean existing files up before writing new one

the in the initial design of journal/undo interaction, ages ago, new file always
overwrote previous files. This is no longer the case for a long while, so it is
time to properly clean things up before writing new ones.

Otherwise, inconsistent "undo" state might exist on disk, leading `hg rollback`
to misbehave (more that intended).

mercurial/transaction.py

@@ -1,886 +1,891 b''
 # transaction.py - simple journaling scheme for mercurial
 #
 # This transaction scheme is intended to gracefully handle program
 # errors and interruptions. More serious failures like system crashes
 # can be recovered with an fsck-like tool. As the whole repository is
 # effectively log-structured, this should amount to simply truncating
 # anything that isn't referenced in the changelog.
 #
 # Copyright 2005, 2006 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.
 
 import errno
 import os
 
 from .i18n import _
 from . import (
     error,
     pycompat,
     util,
 )
 from .utils import stringutil
 
 version = 2
 
 GEN_GROUP_ALL = b'all'
 GEN_GROUP_PRE_FINALIZE = b'prefinalize'
 GEN_GROUP_POST_FINALIZE = b'postfinalize'
 
 
 def active(func):
     def _active(self, *args, **kwds):
         if self._count == 0:
             raise error.ProgrammingError(
                 b'cannot use transaction when it is already committed/aborted'
             )
         return func(self, *args, **kwds)
 
     return _active
 
 
 UNDO_BACKUP = b'%s.backupfiles'
 
 UNDO_FILES_MAY_NEED_CLEANUP = [
     (b'plain', b'%s.desc'),
     # Always delete undo last to make sure we detect that a clean up is needed if
     # the process is interrupted.
     (b'store', b'%s'),
 ]
 
 
 def cleanup_undo_files(report, vfsmap, undo_prefix=b'undo'):
     """remove "undo" files used by the rollback logic
 
     This is useful to prevent rollback running in situation were it does not
     make sense. For example after a strip.
     """
     backup_listing = UNDO_BACKUP % undo_prefix
 
     backup_entries = []
     undo_files = []
     svfs = vfsmap[b'store']
     try:
         with svfs(backup_listing) as f:
             backup_entries = read_backup_files(report, f)
     except OSError as e:
         if e.errno != errno.ENOENT:
             msg = _(b'could not read %s: %s\n')
             msg %= (svfs.join(backup_listing), stringutil.forcebytestr(e))
             report(msg)
 
     for location, f, backup_path, c in backup_entries:
         if location in vfsmap and backup_path:
             undo_files.append((vfsmap[location], backup_path))
 
     undo_files.append((svfs, backup_listing))
     for location, undo_path in UNDO_FILES_MAY_NEED_CLEANUP:
         undo_files.append((vfsmap[location], undo_path % undo_prefix))
     for undovfs, undofile in undo_files:
         try:
             undovfs.unlink(undofile)
         except OSError as e:
             if e.errno != errno.ENOENT:
                 msg = _(b'error removing %s: %s\n')
                 msg %= (undovfs.join(undofile), stringutil.forcebytestr(e))
                 report(msg)
 
 
 def _playback(
     journal,
     report,
     opener,
     vfsmap,
     entries,
     backupentries,
     unlink=True,
     checkambigfiles=None,
 ):
     for f, o in sorted(dict(entries).items()):
         if o or not unlink:
             checkambig = checkambigfiles and (f, b'') in checkambigfiles
             try:
                 fp = opener(f, b'a', checkambig=checkambig)
                 if fp.tell() < o:
                     raise error.Abort(
                         _(
                             b"attempted to truncate %s to %d bytes, but it was "
                             b"already %d bytes\n"
                         )
                         % (f, o, fp.tell())
                     )
                 fp.truncate(o)
                 fp.close()
             except IOError:
                 report(_(b"failed to truncate %s\n") % f)
                 raise
         else:
             try:
                 opener.unlink(f)
             except FileNotFoundError:
                 pass
 
     backupfiles = []
     for l, f, b, c in backupentries:
         if l not in vfsmap and c:
             report(b"couldn't handle %s: unknown cache location %s\n" % (b, l))
         vfs = vfsmap[l]
         try:
             if f and b:
                 filepath = vfs.join(f)
                 backuppath = vfs.join(b)
                 checkambig = checkambigfiles and (f, l) in checkambigfiles
                 try:
                     util.copyfile(backuppath, filepath, checkambig=checkambig)
                     backupfiles.append(b)
                 except IOError as exc:
                     e_msg = stringutil.forcebytestr(exc)
                     report(_(b"failed to recover %s (%s)\n") % (f, e_msg))
             else:
                 target = f or b
                 try:
                     vfs.unlink(target)
                 except FileNotFoundError:
                     pass
         except (IOError, OSError, error.Abort):
             if not c:
                 raise
 
     backuppath = b"%s.backupfiles" % journal
     if opener.exists(backuppath):
         opener.unlink(backuppath)
     opener.unlink(journal)
     try:
         for f in backupfiles:
             if opener.exists(f):
                 opener.unlink(f)
     except (IOError, OSError, error.Abort):
         # only pure backup file remains, it is sage to ignore any error
         pass
 
 
 class transaction(util.transactional):
     def __init__(
         self,
         report,
         opener,
         vfsmap,
         journalname,
         undoname=None,
         after=None,
         createmode=None,
         validator=None,
         releasefn=None,
         checkambigfiles=None,
         name='<unnamed>',
     ):
         """Begin a new transaction
 
         Begins a new transaction that allows rolling back writes in the event of
         an exception.
 
         * `after`: called after the transaction has been committed
         * `createmode`: the mode of the journal file that will be created
         * `releasefn`: called after releasing (with transaction and result)
 
         `checkambigfiles` is a set of (path, vfs-location) tuples,
         which determine whether file stat ambiguity should be avoided
         for corresponded files.
         """
         self._count = 1
         self._usages = 1
         self._report = report
         # a vfs to the store content
         self._opener = opener
         # a map to access file in various {location -> vfs}
         vfsmap = vfsmap.copy()
         vfsmap[b''] = opener  # set default value
         self._vfsmap = vfsmap
         self._after = after
         self._offsetmap = {}
         self._newfiles = set()
         self._journal = journalname
         self._journal_files = []
         self._undoname = undoname
         self._queue = []
         # A callback to do something just after releasing transaction.
         if releasefn is None:
             releasefn = lambda tr, success: None
         self._releasefn = releasefn
 
         self._checkambigfiles = set()
         if checkambigfiles:
             self._checkambigfiles.update(checkambigfiles)
 
         self._names = [name]
 
         # A dict dedicated to precisely tracking the changes introduced in the
         # transaction.
         self.changes = {}
 
         # a dict of arguments to be passed to hooks
         self.hookargs = {}
         self._file = opener.open(self._journal, b"w+")
 
         # a list of ('location', 'path', 'backuppath', cache) entries.
         # - if 'backuppath' is empty, no file existed at backup time
         # - if 'path' is empty, this is a temporary transaction file
         # - if 'location' is not empty, the path is outside main opener reach.
         #   use 'location' value as a key in a vfsmap to find the right 'vfs'
         # (cache is currently unused)
         self._backupentries = []
         self._backupmap = {}
         self._backupjournal = b"%s.backupfiles" % self._journal
         self._backupsfile = opener.open(self._backupjournal, b'w')
         self._backupsfile.write(b'%d\n' % version)
 
         if createmode is not None:
             opener.chmod(self._journal, createmode & 0o666)
             opener.chmod(self._backupjournal, createmode & 0o666)
 
         # hold file generations to be performed on commit
         self._filegenerators = {}
         # hold callback to write pending data for hooks
         self._pendingcallback = {}
         # True is any pending data have been written ever
         self._anypending = False
         # holds callback to call when writing the transaction
         self._finalizecallback = {}
         # holds callback to call when validating the transaction
         # should raise exception if anything is wrong
         self._validatecallback = {}
         if validator is not None:
             self._validatecallback[b'001-userhooks'] = validator
         # hold callback for post transaction close
         self._postclosecallback = {}
         # holds callbacks to call during abort
         self._abortcallback = {}
 
     def __repr__(self):
         name = '/'.join(self._names)
         return '<transaction name=%s, count=%d, usages=%d>' % (
             name,
             self._count,
             self._usages,
         )
 
     def __del__(self):
         if self._journal:
             self._abort()
 
     @property
     def finalized(self):
         return self._finalizecallback is None
 
     @active
     def startgroup(self):
         """delay registration of file entry
 
         This is used by strip to delay vision of strip offset. The transaction
         sees either none or all of the strip actions to be done."""
         self._queue.append([])
 
     @active
     def endgroup(self):
         """apply delayed registration of file entry.
 
         This is used by strip to delay vision of strip offset. The transaction
         sees either none or all of the strip actions to be done."""
         q = self._queue.pop()
         for f, o in q:
             self._addentry(f, o)
 
     @active
     def add(self, file, offset):
         """record the state of an append-only file before update"""
         if (
             file in self._newfiles
             or file in self._offsetmap
             or file in self._backupmap
         ):
             return
         if self._queue:
             self._queue[-1].append((file, offset))
             return
 
         self._addentry(file, offset)
 
     def _addentry(self, file, offset):
         """add a append-only entry to memory and on-disk state"""
         if (
             file in self._newfiles
             or file in self._offsetmap
             or file in self._backupmap
         ):
             return
         if offset:
             self._offsetmap[file] = offset
         else:
             self._newfiles.add(file)
         # add enough data to the journal to do the truncate
         self._file.write(b"%s\0%d\n" % (file, offset))
         self._file.flush()
 
     @active
     def addbackup(self, file, hardlink=True, location=b''):
         """Adds a backup of the file to the transaction
 
         Calling addbackup() creates a hardlink backup of the specified file
         that is used to recover the file in the event of the transaction
         aborting.
 
         * `file`: the file path, relative to .hg/store
         * `hardlink`: use a hardlink to quickly create the backup
         """
         if self._queue:
             msg = b'cannot use transaction.addbackup inside "group"'
             raise error.ProgrammingError(msg)
 
         if (
             file in self._newfiles
             or file in self._offsetmap
             or file in self._backupmap
         ):
             return
         vfs = self._vfsmap[location]
         dirname, filename = vfs.split(file)
         backupfilename = b"%s.backup.%s" % (self._journal, filename)
         backupfile = vfs.reljoin(dirname, backupfilename)
         if vfs.exists(file):
             filepath = vfs.join(file)
             backuppath = vfs.join(backupfile)
             util.copyfile(filepath, backuppath, hardlink=hardlink)
         else:
             backupfile = b''
 
         self._addbackupentry((location, file, backupfile, False))
 
     def _addbackupentry(self, entry):
         """register a new backup entry and write it to disk"""
         self._backupentries.append(entry)
         self._backupmap[entry[1]] = len(self._backupentries) - 1
         self._backupsfile.write(b"%s\0%s\0%s\0%d\n" % entry)
         self._backupsfile.flush()
 
     @active
     def registertmp(self, tmpfile, location=b''):
         """register a temporary transaction file
 
         Such files will be deleted when the transaction exits (on both
         failure and success).
         """
         self._addbackupentry((location, b'', tmpfile, False))
 
     @active
     def addfilegenerator(
         self,
         genid,
         filenames,
         genfunc,
         order=0,
         location=b'',
         post_finalize=False,
     ):
         """add a function to generates some files at transaction commit
 
         The `genfunc` argument is a function capable of generating proper
         content of each entry in the `filename` tuple.
 
         At transaction close time, `genfunc` will be called with one file
         object argument per entries in `filenames`.
 
         The transaction itself is responsible for the backup, creation and
         final write of such file.
 
         The `genid` argument is used to ensure the same set of file is only
         generated once. Call to `addfilegenerator` for a `genid` already
         present will overwrite the old entry.
 
         The `order` argument may be used to control the order in which multiple
         generator will be executed.
 
         The `location` arguments may be used to indicate the files are located
         outside of the the standard directory for transaction. It should match
         one of the key of the `transaction.vfsmap` dictionary.
 
         The `post_finalize` argument can be set to `True` for file generation
         that must be run after the transaction has been finalized.
         """
         # For now, we are unable to do proper backup and restore of custom vfs
         # but for bookmarks that are handled outside this mechanism.
         entry = (order, filenames, genfunc, location, post_finalize)
         self._filegenerators[genid] = entry
 
     @active
     def removefilegenerator(self, genid):
         """reverse of addfilegenerator, remove a file generator function"""
         if genid in self._filegenerators:
             del self._filegenerators[genid]
 
     def _generatefiles(self, suffix=b'', group=GEN_GROUP_ALL):
         # write files registered for generation
         any = False
 
         if group == GEN_GROUP_ALL:
             skip_post = skip_pre = False
         else:
             skip_pre = group == GEN_GROUP_POST_FINALIZE
             skip_post = group == GEN_GROUP_PRE_FINALIZE
 
         for id, entry in sorted(self._filegenerators.items()):
             any = True
             order, filenames, genfunc, location, post_finalize = entry
 
             # for generation at closing, check if it's before or after finalize
             if skip_post and post_finalize:
                 continue
             elif skip_pre and not post_finalize:
                 continue
 
             vfs = self._vfsmap[location]
             files = []
             try:
                 for name in filenames:
                     name += suffix
                     if suffix:
                         self.registertmp(name, location=location)
                         checkambig = False
                     else:
                         self.addbackup(name, location=location)
                         checkambig = (name, location) in self._checkambigfiles
                     files.append(
                         vfs(name, b'w', atomictemp=True, checkambig=checkambig)
                     )
                 genfunc(*files)
                 for f in files:
                     f.close()
                 # skip discard() loop since we're sure no open file remains
                 del files[:]
             finally:
                 for f in files:
                     f.discard()
         return any
 
     @active
     def findoffset(self, file):
         if file in self._newfiles:
             return 0
         return self._offsetmap.get(file)
 
     @active
     def readjournal(self):
         self._file.seek(0)
         entries = []
         for l in self._file.readlines():
             file, troffset = l.split(b'\0')
             entries.append((file, int(troffset)))
         return entries
 
     @active
     def replace(self, file, offset):
         """
         replace can only replace already committed entries
         that are not pending in the queue
         """
         if file in self._newfiles:
             if not offset:
                 return
             self._newfiles.remove(file)
             self._offsetmap[file] = offset
         elif file in self._offsetmap:
             if not offset:
                 del self._offsetmap[file]
                 self._newfiles.add(file)
             else:
                 self._offsetmap[file] = offset
         else:
             raise KeyError(file)
         self._file.write(b"%s\0%d\n" % (file, offset))
         self._file.flush()
 
     @active
     def nest(self, name='<unnamed>'):
         self._count += 1
         self._usages += 1
         self._names.append(name)
         return self
 
     def release(self):
         if self._count > 0:
             self._usages -= 1
         if self._names:
             self._names.pop()
         # if the transaction scopes are left without being closed, fail
         if self._count > 0 and self._usages == 0:
             self._abort()
 
     def running(self):
         return self._count > 0
 
     def addpending(self, category, callback):
         """add a callback to be called when the transaction is pending
 
         The transaction will be given as callback's first argument.
 
         Category is a unique identifier to allow overwriting an old callback
         with a newer callback.
         """
         self._pendingcallback[category] = callback
 
     @active
     def writepending(self):
         """write pending file to temporary version
 
         This is used to allow hooks to view a transaction before commit"""
         categories = sorted(self._pendingcallback)
         for cat in categories:
             # remove callback since the data will have been flushed
             any = self._pendingcallback.pop(cat)(self)
             self._anypending = self._anypending or any
         self._anypending |= self._generatefiles(suffix=b'.pending')
         return self._anypending
 
     @active
     def hasfinalize(self, category):
         """check is a callback already exist for a category"""
         return category in self._finalizecallback
 
     @active
     def addfinalize(self, category, callback):
         """add a callback to be called when the transaction is closed
 
         The transaction will be given as callback's first argument.
 
         Category is a unique identifier to allow overwriting old callbacks with
         newer callbacks.
         """
         self._finalizecallback[category] = callback
 
     @active
     def addpostclose(self, category, callback):
         """add or replace a callback to be called after the transaction closed
 
         The transaction will be given as callback's first argument.
 
         Category is a unique identifier to allow overwriting an old callback
         with a newer callback.
         """
         self._postclosecallback[category] = callback
 
     @active
     def getpostclose(self, category):
         """return a postclose callback added before, or None"""
         return self._postclosecallback.get(category, None)
 
     @active
     def addabort(self, category, callback):
         """add a callback to be called when the transaction is aborted.
 
         The transaction will be given as the first argument to the callback.
 
         Category is a unique identifier to allow overwriting an old callback
         with a newer callback.
         """
         self._abortcallback[category] = callback
 
     @active
     def addvalidator(self, category, callback):
         """adds a callback to be called when validating the transaction.
 
         The transaction will be given as the first argument to the callback.
 
         callback should raise exception if to abort transaction"""
         self._validatecallback[category] = callback
 
     @active
     def close(self):
         '''commit the transaction'''
         if self._count == 1:
             for category in sorted(self._validatecallback):
                 self._validatecallback[category](self)
             self._validatecallback = None  # Help prevent cycles.
             self._generatefiles(group=GEN_GROUP_PRE_FINALIZE)
             while self._finalizecallback:
                 callbacks = self._finalizecallback
                 self._finalizecallback = {}
                 categories = sorted(callbacks)
                 for cat in categories:
                     callbacks[cat](self)
             # Prevent double usage and help clear cycles.
             self._finalizecallback = None
             self._generatefiles(group=GEN_GROUP_POST_FINALIZE)
 
         self._count -= 1
         if self._count != 0:
             return
         self._file.close()
         self._backupsfile.close()
         # cleanup temporary files
         for l, f, b, c in self._backupentries:
             if l not in self._vfsmap and c:
                 self._report(
                     b"couldn't remove %s: unknown cache location %s\n" % (b, l)
                 )
                 continue
             vfs = self._vfsmap[l]
             if not f and b and vfs.exists(b):
                 try:
                     vfs.unlink(b)
                 except (IOError, OSError, error.Abort) as inst:
                     if not c:
                         raise
                     # Abort may be raise by read only opener
                     self._report(
                         b"couldn't remove %s: %s\n" % (vfs.join(b), inst)
                     )
         self._offsetmap = {}
         self._newfiles = set()
         self._writeundo()
         if self._after:
             self._after()
             self._after = None  # Help prevent cycles.
         if self._opener.isfile(self._backupjournal):
             self._opener.unlink(self._backupjournal)
         if self._opener.isfile(self._journal):
             self._opener.unlink(self._journal)
         for l, _f, b, c in self._backupentries:
             if l not in self._vfsmap and c:
                 self._report(
                     b"couldn't remove %s: unknown cache location"
                     b"%s\n" % (b, l)
                 )
                 continue
             vfs = self._vfsmap[l]
             if b and vfs.exists(b):
                 try:
                     vfs.unlink(b)
                 except (IOError, OSError, error.Abort) as inst:
                     if not c:
                         raise
                     # Abort may be raise by read only opener
                     self._report(
                         b"couldn't remove %s: %s\n" % (vfs.join(b), inst)
                     )
         self._backupentries = []
         self._journal = None
 
         self._releasefn(self, True)  # notify success of closing transaction
         self._releasefn = None  # Help prevent cycles.
 
         # run post close action
         categories = sorted(self._postclosecallback)
         for cat in categories:
             self._postclosecallback[cat](self)
         # Prevent double usage and help clear cycles.
         self._postclosecallback = None
 
     @active
     def abort(self):
         """abort the transaction (generally called on error, or when the
         transaction is not explicitly committed before going out of
         scope)"""
         self._abort()
 
     @active
     def add_journal(self, vfs_id, path):
         self._journal_files.append((vfs_id, path))
 
     def _writeundo(self):
         """write transaction data for possible future undo call"""
         if self._undoname is None:
             return
+        cleanup_undo_files(
+            self._report,
+            self._vfsmap,
+            undo_prefix=self._undoname,
+        )
 
         def undoname(fn: bytes) -> bytes:
             base, name = os.path.split(fn)
             assert name.startswith(self._journal)
             new_name = name.replace(self._journal, self._undoname, 1)
             return os.path.join(base, new_name)
 
         undo_backup_path = b"%s.backupfiles" % self._undoname
         undobackupfile = self._opener.open(undo_backup_path, b'w')
         undobackupfile.write(b'%d\n' % version)
         for l, f, b, c in self._backupentries:
             if not f:  # temporary file
                 continue
             if not b:
                 u = b''
             else:
                 if l not in self._vfsmap and c:
                     self._report(
                         b"couldn't remove %s: unknown cache location"
                         b"%s\n" % (b, l)
                     )
                     continue
                 vfs = self._vfsmap[l]
                 u = undoname(b)
                 util.copyfile(vfs.join(b), vfs.join(u), hardlink=True)
             undobackupfile.write(b"%s\0%s\0%s\0%d\n" % (l, f, u, c))
         undobackupfile.close()
         for vfs, src in self._journal_files:
             dest = undoname(src)
             # if src and dest refer to a same file, vfs.rename is a no-op,
             # leaving both src and dest on disk. delete dest to make sure
             # the rename couldn't be such a no-op.
             vfs.tryunlink(dest)
             try:
                 vfs.rename(src, dest)
             except FileNotFoundError:  # journal file does not yet exist
                 pass
 
     def _abort(self):
         entries = self.readjournal()
         self._count = 0
         self._usages = 0
         self._file.close()
         self._backupsfile.close()
 
         quick = self._can_quick_abort(entries)
         try:
             if not quick:
                 self._report(_(b"transaction abort!\n"))
             for cat in sorted(self._abortcallback):
                 self._abortcallback[cat](self)
             # Prevent double usage and help clear cycles.
             self._abortcallback = None
             if quick:
                 self._do_quick_abort(entries)
             else:
                 self._do_full_abort(entries)
         finally:
             self._journal = None
             self._releasefn(self, False)  # notify failure of transaction
             self._releasefn = None  # Help prevent cycles.
 
     def _can_quick_abort(self, entries):
         """False if any semantic content have been written on disk
 
         True if nothing, except temporary files has been writen on disk."""
         if entries:
             return False
         for e in self._backupentries:
             if e[1]:
                 return False
         return True
 
     def _do_quick_abort(self, entries):
         """(Silently) do a quick cleanup (see _can_quick_abort)"""
         assert self._can_quick_abort(entries)
         tmp_files = [e for e in self._backupentries if not e[1]]
         for vfs_id, old_path, tmp_path, xxx in tmp_files:
             vfs = self._vfsmap[vfs_id]
             try:
                 vfs.unlink(tmp_path)
             except FileNotFoundError:
                 pass
         if self._backupjournal:
             self._opener.unlink(self._backupjournal)
         if self._journal:
             self._opener.unlink(self._journal)
 
     def _do_full_abort(self, entries):
         """(Noisily) rollback all the change introduced by the transaction"""
         try:
             _playback(
                 self._journal,
                 self._report,
                 self._opener,
                 self._vfsmap,
                 entries,
                 self._backupentries,
                 False,
                 checkambigfiles=self._checkambigfiles,
             )
             self._report(_(b"rollback completed\n"))
         except BaseException as exc:
             self._report(_(b"rollback failed - please run hg recover\n"))
             self._report(
                 _(b"(failure reason: %s)\n") % stringutil.forcebytestr(exc)
             )
 
 
 BAD_VERSION_MSG = _(
     b"journal was created by a different version of Mercurial\n"
 )
 
 
 def read_backup_files(report, fp):
     """parse an (already open) backup file an return contained backup entries
 
     entries are in the form: (location, file, backupfile, xxx)
 
     :location:   the vfs identifier (vfsmap's key)
     :file:       original file path (in the vfs)
     :backupfile: path of the backup (in the vfs)
     :cache:      a boolean currently always set to False
     """
     lines = fp.readlines()
     backupentries = []
     if lines:
         ver = lines[0][:-1]
         if ver != (b'%d' % version):
             report(BAD_VERSION_MSG)
         else:
             for line in lines[1:]:
                 if line:
                     # Shave off the trailing newline
                     line = line[:-1]
                     l, f, b, c = line.split(b'\0')
                     backupentries.append((l, f, b, bool(c)))
     return backupentries
 
 
 def rollback(
     opener,
     vfsmap,
     file,
     report,
     checkambigfiles=None,
     skip_journal_pattern=None,
 ):
     """Rolls back the transaction contained in the given file
 
     Reads the entries in the specified file, and the corresponding
     '*.backupfiles' file, to recover from an incomplete transaction.
 
     * `file`: a file containing a list of entries, specifying where
     to truncate each file.  The file should contain a list of
     file\0offset pairs, delimited by newlines. The corresponding
     '*.backupfiles' file should contain a list of file\0backupfile
     pairs, delimited by \0.
 
     `checkambigfiles` is a set of (path, vfs-location) tuples,
     which determine whether file stat ambiguity should be avoided at
     restoring corresponded files.
     """
     entries = []
     backupentries = []
 
     with opener.open(file) as fp:
         lines = fp.readlines()
     for l in lines:
         try:
             f, o = l.split(b'\0')
             entries.append((f, int(o)))
         except ValueError:
             report(
                 _(b"couldn't read journal entry %r!\n") % pycompat.bytestr(l)
             )
 
     backupjournal = b"%s.backupfiles" % file
     if opener.exists(backupjournal):
         with opener.open(backupjournal) as fp:
             backupentries = read_backup_files(report, fp)
     if skip_journal_pattern is not None:
         keep = lambda x: not skip_journal_pattern.match(x[1])
         backupentries = [x for x in backupentries if keep(x)]
 
     _playback(
         file,
         report,
         opener,
         vfsmap,
         entries,
         backupentries,
         checkambigfiles=checkambigfiles,
     )

tests/test-hardlinks.t

@@ -1,431 +1,425 b''
 #require hardlink reporevlogstore
 
   $ cat > nlinks.py <<EOF
   > import sys
   > from mercurial import pycompat, util
   > for f in sorted(sys.stdin.readlines()):
   >     f = f[:-1]
   >     print(util.nlinks(pycompat.fsencode(f)), f)
   > EOF
 
   $ nlinksdir()
   > {
   >     find "$@" -type f | "$PYTHON" $TESTTMP/nlinks.py
   > }
 
 Some implementations of cp can't create hardlinks (replaces 'cp -al' on Linux):
 
   $ cat > linkcp.py <<EOF
   > import sys
   > from mercurial import pycompat, util
   > util.copyfiles(pycompat.fsencode(sys.argv[1]),
   >                pycompat.fsencode(sys.argv[2]), hardlink=True)
   > EOF
 
   $ linkcp()
   > {
   >     "$PYTHON" $TESTTMP/linkcp.py $1 $2
   > }
 
 Prepare repo r1:
 
   $ hg init r1
   $ cd r1
 
   $ echo c1 > f1
   $ hg add f1
   $ hg ci -m0
 
   $ mkdir d1
   $ cd d1
   $ echo c2 > f2
   $ hg add f2
   $ hg ci -m1
   $ cd ../..
 
   $ nlinksdir r1/.hg/store
   1 r1/.hg/store/00changelog.i
   1 r1/.hg/store/00manifest.i
   1 r1/.hg/store/data/d1/f2.i
   1 r1/.hg/store/data/f1.i
   1 r1/.hg/store/fncache (repofncache !)
   1 r1/.hg/store/phaseroots
   1 r1/.hg/store/requires
   1 r1/.hg/store/undo
   1 r1/.hg/store/undo.backup.fncache (repofncache !)
   1 r1/.hg/store/undo.backupfiles
 
 
 Create hardlinked clone r2:
 
   $ hg clone -U --debug r1 r2 --config progress.debug=true
   linking: 1/7 files (14.29%)
   linking: 2/7 files (28.57%)
   linking: 3/7 files (42.86%)
   linking: 4/7 files (57.14%)
   linking: 5/7 files (71.43%)
   linking: 6/7 files (85.71%)
   linking: 7/7 files (100.00%)
   linked 7 files
   updating the branch cache
 
 Create non-hardlinked clone r3:
 
   $ hg clone --pull r1 r3
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 2 files
   new changesets 40d85e9847f2:7069c422939c
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 
 Repos r1 and r2 should now contain hardlinked files:
 
   $ nlinksdir r1/.hg/store
   2 r1/.hg/store/00changelog.i
   2 r1/.hg/store/00manifest.i
   2 r1/.hg/store/data/d1/f2.i
   2 r1/.hg/store/data/f1.i
   1 r1/.hg/store/fncache (repofncache !)
   1 r1/.hg/store/phaseroots
   1 r1/.hg/store/requires
   1 r1/.hg/store/undo
   1 r1/.hg/store/undo.backup.fncache (repofncache !)
   1 r1/.hg/store/undo.backupfiles
 
   $ nlinksdir r2/.hg/store
   2 r2/.hg/store/00changelog.i
   2 r2/.hg/store/00manifest.i
   2 r2/.hg/store/data/d1/f2.i
   2 r2/.hg/store/data/f1.i
   1 r2/.hg/store/fncache (repofncache !)
   1 r2/.hg/store/requires
 
 Repo r3 should not be hardlinked:
 
   $ nlinksdir r3/.hg/store
   1 r3/.hg/store/00changelog.i
   1 r3/.hg/store/00manifest.i
   1 r3/.hg/store/data/d1/f2.i
   1 r3/.hg/store/data/f1.i
   1 r3/.hg/store/fncache (repofncache !)
   1 r3/.hg/store/phaseroots
   1 r3/.hg/store/requires
   1 r3/.hg/store/undo
   1 r3/.hg/store/undo.backupfiles
 
 
 Create a non-inlined filelog in r3:
 
   $ cd r3/d1
   >>> f = open('data1', 'wb')
   >>> for x in range(10000):
   ...     f.write(b"%d\n" % x) and None
   >>> f.close()
   $ for j in 0 1 2 3 4 5 6 7 8 9; do
   >   cat data1 >> f2
   >   hg commit -m$j
   > done
   $ cd ../..
 
   $ nlinksdir r3/.hg/store
   1 r3/.hg/store/00changelog.i
   1 r3/.hg/store/00manifest.i
   1 r3/.hg/store/data/d1/f2.d
   1 r3/.hg/store/data/d1/f2.i
   1 r3/.hg/store/data/f1.i
   1 r3/.hg/store/fncache (repofncache !)
   1 r3/.hg/store/phaseroots
   1 r3/.hg/store/requires
   1 r3/.hg/store/undo
-  1 r3/.hg/store/undo.backup.fncache (repofncache !)
-  1 r3/.hg/store/undo.backup.phaseroots
   1 r3/.hg/store/undo.backupfiles
 
 Push to repo r1 should break up most hardlinks in r2:
 
   $ hg -R r2 verify -q
 
   $ cd r3
   $ hg push
   pushing to $TESTTMP/r1
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 10 changesets with 10 changes to 1 files
 
   $ cd ..
 
   $ nlinksdir r2/.hg/store
   1 r2/.hg/store/00changelog.i
   1 r2/.hg/store/00manifest.i
   1 r2/.hg/store/data/d1/f2.i
   2 r2/.hg/store/data/f1.i
   [12] r2/\.hg/store/fncache (re) (repofncache !)
   1 r2/.hg/store/requires
 
 #if hardlink-whitelisted repofncache
   $ nlinksdir r2/.hg/store/fncache
   1 r2/.hg/store/fncache
 #endif
 
   $ hg -R r2 verify -q
 
   $ cd r1
   $ hg up
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Committing a change to f1 in r1 must break up hardlink f1.i in r2:
 
   $ echo c1c1 >> f1
   $ hg ci -m00
   $ cd ..
 
   $ nlinksdir r2/.hg/store
   1 r2/.hg/store/00changelog.i
   1 r2/.hg/store/00manifest.i
   1 r2/.hg/store/data/d1/f2.i
   1 r2/.hg/store/data/f1.i
   1 r2/.hg/store/fncache (repofncache !)
   1 r2/.hg/store/requires
 
 #if hardlink-whitelisted repofncache
   $ nlinksdir r2/.hg/store/fncache
   1 r2/.hg/store/fncache
 #endif
 
 Create a file which exec permissions we will change
   $ cd r3
   $ echo "echo hello world" > f3
   $ hg add f3
   $ hg ci -mf3
   $ cd ..
 
   $ cd r3
   $ hg tip --template '{rev}:{node|short}\n'
   12:d3b77733a28a
   $ echo bla > f1
   $ chmod +x f3
   $ hg ci -m1
   $ cd ..
 
 Create hardlinked copy r4 of r3 (on Linux, we would call 'cp -al'):
 
   $ linkcp r3 r4
 
 'checklink' is produced by hardlinking a symlink, which is undefined whether
 the symlink should be followed or not. It does behave differently on Linux and
 BSD. Just remove it so the test pass on both platforms.
 
   $ rm -f r4/.hg/wcache/checklink
 
 r4 has hardlinks in the working dir (not just inside .hg):
 
   $ nlinksdir r4
   2 r4/.hg/00changelog.i
   [24] r4/.hg/branch (re)
   2 r4/.hg/cache/branch2-base
   2 r4/.hg/cache/branch2-immutable
   2 r4/.hg/cache/branch2-served
   2 r4/.hg/cache/branch2-served.hidden
   2 r4/.hg/cache/branch2-visible
   2 r4/.hg/cache/branch2-visible-hidden
   2 r4/.hg/cache/rbc-names-v1
   2 r4/.hg/cache/rbc-revs-v1
   2 r4/.hg/cache/tags2
   2 r4/.hg/cache/tags2-served
   2 r4/.hg/dirstate
   2 r4/.hg/fsmonitor.state (fsmonitor !)
   2 r4/.hg/hgrc
   2 r4/.hg/last-message.txt
   2 r4/.hg/requires
   2 r4/.hg/store/00changelog.i
   2 r4/.hg/store/00manifest.i
   2 r4/.hg/store/data/d1/f2.d
   2 r4/.hg/store/data/d1/f2.i
   2 r4/.hg/store/data/f1.i
   2 r4/.hg/store/data/f3.i
   2 r4/.hg/store/fncache (repofncache !)
   2 r4/.hg/store/phaseroots
   2 r4/.hg/store/requires
   2 r4/.hg/store/undo
-  2 r4/.hg/store/undo.backup.fncache (repofncache !)
-  2 r4/.hg/store/undo.backup.phaseroots
   2 r4/.hg/store/undo.backupfiles
   [24] r4/.hg/undo.backup.branch (re)
   2 r4/\.hg/undo\.backup\.dirstate (re)
   2 r4/.hg/undo.desc
   2 r4/.hg/wcache/checkisexec (execbit !)
   2 r4/.hg/wcache/checklink-target (symlink !)
   2 r4/.hg/wcache/checknoexec (execbit !)
   2 r4/.hg/wcache/manifestfulltextcache (reporevlogstore !)
   2 r4/d1/data1
   2 r4/d1/f2
   2 r4/f1
   2 r4/f3
 
 Update back to revision 12 in r4 should break hardlink of file f1 and f3:
 #if hardlink-whitelisted
   $ nlinksdir r4/.hg/undo.backup.dirstate r4/.hg/dirstate
   2 r4/.hg/dirstate
   2 r4/.hg/undo.backup.dirstate
 #endif
 
 
   $ hg -R r4 up 12
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved (execbit !)
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved (no-execbit !)
 
   $ nlinksdir r4
   2 r4/.hg/00changelog.i
   1 r4/.hg/branch
   2 r4/.hg/cache/branch2-base
   2 r4/.hg/cache/branch2-immutable
   2 r4/.hg/cache/branch2-served
   2 r4/.hg/cache/branch2-served.hidden
   2 r4/.hg/cache/branch2-visible
   2 r4/.hg/cache/branch2-visible-hidden
   2 r4/.hg/cache/rbc-names-v1
   2 r4/.hg/cache/rbc-revs-v1
   2 r4/.hg/cache/tags2
   2 r4/.hg/cache/tags2-served
   1 r4/.hg/dirstate
   1 r4/.hg/fsmonitor.state (fsmonitor !)
   2 r4/.hg/hgrc
   2 r4/.hg/last-message.txt
   2 r4/.hg/requires
   2 r4/.hg/store/00changelog.i
   2 r4/.hg/store/00manifest.i
   2 r4/.hg/store/data/d1/f2.d
   2 r4/.hg/store/data/d1/f2.i
   2 r4/.hg/store/data/f1.i
   2 r4/.hg/store/data/f3.i
   2 r4/.hg/store/fncache
   2 r4/.hg/store/phaseroots
   2 r4/.hg/store/requires
   2 r4/.hg/store/undo
-  2 r4/.hg/store/undo.backup.fncache (repofncache !)
-  2 r4/.hg/store/undo.backup.phaseroots
   2 r4/.hg/store/undo.backupfiles
   [23] r4/.hg/undo.backup.branch (re)
   2 r4/\.hg/undo\.backup\.dirstate (re)
   2 r4/.hg/undo.desc
   2 r4/.hg/wcache/checkisexec (execbit !)
   2 r4/.hg/wcache/checklink-target (symlink !)
   2 r4/.hg/wcache/checknoexec (execbit !)
   1 r4/.hg/wcache/manifestfulltextcache (reporevlogstore !)
   2 r4/d1/data1
   2 r4/d1/f2
   1 r4/f1
   1 r4/f3 (execbit !)
   2 r4/f3 (no-execbit !)
 
 #if hardlink-whitelisted
   $ nlinksdir r4/.hg/undo.backup.dirstate r4/.hg/dirstate
   1 r4/.hg/dirstate
   2 r4/.hg/undo.backup.dirstate
 #endif
 
 Test hardlinking outside hg:
 
   $ mkdir x
   $ echo foo > x/a
 
   $ linkcp x y
   $ echo bar >> y/a
 
 No diff if hardlink:
 
   $ diff x/a y/a
 
 Test mq hardlinking:
 
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "mq=" >> $HGRCPATH
 
   $ hg init a
   $ cd a
 
   $ hg qimport -n foo - << EOF
   > # HG changeset patch
   > # Date 1 0
   > diff -r 2588a8b53d66 a
   > --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   > +++ b/a	Wed Jul 23 15:54:29 2008 +0200
   > @@ -0,0 +1,1 @@
   > +a
   > EOF
   adding foo to series file
 
   $ hg qpush
   applying foo
   now at: foo
 
   $ cd ..
   $ linkcp a b
   $ cd b
 
   $ hg qimport -n bar - << EOF
   > # HG changeset patch
   > # Date 2 0
   > diff -r 2588a8b53d66 a
   > --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   > +++ b/b	Wed Jul 23 15:54:29 2008 +0200
   > @@ -0,0 +1,1 @@
   > +b
   > EOF
   adding bar to series file
 
   $ hg qpush
   applying bar
   now at: bar
 
   $ cat .hg/patches/status
   430ed4828a74fa4047bc816a25500f7472ab4bfe:foo
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c:bar
 
   $ cat .hg/patches/series
   foo
   bar
 
   $ cat ../a/.hg/patches/status
   430ed4828a74fa4047bc816a25500f7472ab4bfe:foo
 
   $ cat ../a/.hg/patches/series
   foo
 
 Test tags hardlinking:
 
   $ hg qdel -r qbase:qtip
   patch foo finalized without changeset message
   patch bar finalized without changeset message
 
   $ hg tag -l lfoo
   $ hg tag foo
 
   $ cd ..
   $ linkcp b c
   $ cd c
 
   $ hg tag -l -r 0 lbar
   $ hg tag -r 0 bar
 
   $ cat .hgtags
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c foo
   430ed4828a74fa4047bc816a25500f7472ab4bfe bar
 
   $ cat .hg/localtags
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c lfoo
   430ed4828a74fa4047bc816a25500f7472ab4bfe lbar
 
   $ cat ../b/.hgtags
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c foo
 
   $ cat ../b/.hg/localtags
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c lfoo
 
   $ cd ..

tests/test-largefiles-cache.t

@@ -1,264 +1,263 b''
 Create user cache directory
 
   $ USERCACHE=`pwd`/cache; export USERCACHE
   $ cat <<EOF >> ${HGRCPATH}
   > [extensions]
   > hgext.largefiles=
   > [largefiles]
   > usercache=${USERCACHE}
   > EOF
   $ mkdir -p ${USERCACHE}
 
 Create source repo, and commit adding largefile.
 
   $ hg init src
   $ cd src
   $ echo large > large
   $ hg add --large large
   $ hg commit -m 'add largefile'
   $ hg rm large
   $ hg commit -m 'branchhead without largefile' large
   $ hg up -qr 0
   $ rm large
   $ echo "0000000000000000000000000000000000000000" > .hglf/large
   $ hg commit -m 'commit missing file with corrupt standin' large
   abort: large: file not found!
   [255]
   $ hg up -Cqr 0
   $ cd ..
 
 Discard all cached largefiles in USERCACHE
 
   $ rm -rf ${USERCACHE}
 
 Create mirror repo, and pull from source without largefile:
 "pull" is used instead of "clone" for suppression of (1) updating to
 tip (= caching largefile from source repo), and (2) recording source
 repo as "default" path in .hg/hgrc.
 
   $ hg init mirror
   $ cd mirror
   $ hg pull ../src
   pulling from ../src
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 1 changes to 1 files
   new changesets eb85d9124f3f:26c18ce05e4e
   (run 'hg update' to get a working copy)
 
 Update working directory to "tip", which requires largefile("large"),
 but there is no cache file for it.  So, hg must treat it as
 "missing"(!) file.
 
   $ hg update -r0
   getting changed largefiles
   large: largefile 7f7097b041ccf68cc5561e9600da4655d21c6d18 not available from file:/*/$TESTTMP/mirror (glob)
   0 largefiles updated, 0 removed
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg status
   ! large
 
 Update working directory to null: this cleanup .hg/largefiles/dirstate
 
   $ hg update null
   getting changed largefiles
   0 largefiles updated, 0 removed
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
 Update working directory to tip, again.
 
   $ hg update -r0
   getting changed largefiles
   large: largefile 7f7097b041ccf68cc5561e9600da4655d21c6d18 not available from file:/*/$TESTTMP/mirror (glob)
   0 largefiles updated, 0 removed
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg status
   ! large
   $ cd ..
 
 Verify that largefiles from pulled branchheads are fetched, also to an empty repo
 
   $ hg init mirror2
   $ hg -R mirror2 pull src -r0
   pulling from src
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets eb85d9124f3f
   (run 'hg update' to get a working copy)
 
 #if unix-permissions
 
 Portable way to print file permissions:
 
   $ cat > ls-l.py <<EOF
   > #!$PYTHON
   > import os
   > import sys
   > path = sys.argv[1]
   > print('%03o' % (os.lstat(path).st_mode & 0o777))
   > EOF
   $ chmod +x ls-l.py
 
 Test that files in .hg/largefiles inherit mode from .hg/store, not
 from file in working copy:
 
   $ cd src
   $ chmod 750 .hg/store
   $ chmod 660 large
   $ echo change >> large
   $ hg commit -m change
   created new head
   $ ../ls-l.py .hg/largefiles/e151b474069de4ca6898f67ce2f2a7263adf8fea
   640
 
 Test permission of with files in .hg/largefiles created by update:
 
   $ cd ../mirror
   $ rm -r "$USERCACHE" .hg/largefiles # avoid links
   $ chmod 750 .hg/store
   $ hg pull ../src --update -q
   $ ../ls-l.py .hg/largefiles/e151b474069de4ca6898f67ce2f2a7263adf8fea
   640
 
 Test permission of files created by push:
 
   $ hg serve -R ../src -d -p $HGPORT --pid-file hg.pid \
   >          --config "web.allow_push=*" --config web.push_ssl=no
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ echo change >> large
   $ hg commit -m change
 
   $ rm -r "$USERCACHE"
 
   $ hg push -q http://localhost:$HGPORT/
 
   $ ../ls-l.py ../src/.hg/largefiles/b734e14a0971e370408ab9bce8d56d8485e368a9
   640
 
   $ cd ..
 
 #endif
 
 Test issue 4053 (remove --after on a deleted, uncommitted file shouldn't say
 it is missing, but a remove on a nonexistent unknown file still should.  Same
 for a forget.)
 
   $ cd src
   $ touch x
   $ hg add x
   $ mv x y
   $ hg remove -A x y ENOENT
   ENOENT: * (glob)
   not removing y: file is untracked
   [1]
   $ hg add y
   $ mv y z
   $ hg forget y z ENOENT
   ENOENT: * (glob)
   not removing z: file is already untracked
   [1]
 
 Largefiles are accessible from the share's store
   $ cd ..
   $ hg share -q src share_dst --config extensions.share=
   $ hg -R share_dst update -r0
   getting changed largefiles
   1 largefiles updated, 0 removed
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ echo modified > share_dst/large
   $ hg -R share_dst ci -m modified
   created new head
 
 Only dirstate is in the local store for the share, and the largefile is in the
 share source's local store.  Avoid the extra largefiles added in the unix
 conditional above.
   $ hash=`hg -R share_dst cat share_dst/.hglf/large`
   $ echo $hash
   e2fb5f2139d086ded2cb600d5a91a196e76bf020
 
   $ find share_dst/.hg/largefiles/* | sort
   share_dst/.hg/largefiles/dirstate
   share_dst/.hg/largefiles/undo.backup.dirstate
 
   $ find src/.hg/largefiles/* | egrep "(dirstate|$hash)" | sort
   src/.hg/largefiles/dirstate
   src/.hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020
-  src/.hg/largefiles/undo.backup.dirstate
 
 Verify that backwards compatibility is maintained for old storage layout
   $ mv src/.hg/largefiles/$hash share_dst/.hg/largefiles
   $ hg verify --quiet --lfa -R share_dst --config largefiles.usercache=
 
 Inject corruption into the largefiles store and see how update handles that:
 
   $ cd src
   $ hg up -qC tip
   $ cat large
   modified
   $ rm large
   $ cat .hglf/large
   e2fb5f2139d086ded2cb600d5a91a196e76bf020
   $ mv .hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020 ..
   $ echo corruption > .hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020
   $ hg up -C
   getting changed largefiles
   large: data corruption in $TESTTMP/src/.hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020 with hash 6a7bb2556144babe3899b25e5428123735bb1e27
   0 largefiles updated, 0 removed
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   updated to "cd24c147f45c: modified"
   [12] other heads for branch "default" (re)
   $ hg st
   ! large
   ? z
   $ rm .hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020
 
 #if serve
 
 Test coverage of error handling from putlfile:
 
   $ mkdir $TESTTMP/mirrorcache
   $ hg serve -R ../mirror -d -p $HGPORT1 --pid-file hg.pid --config largefiles.usercache=$TESTTMP/mirrorcache
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ hg push http://localhost:$HGPORT1 -f --config files.usercache=nocache
   pushing to http://localhost:$HGPORT1/
   searching for changes
   abort: remotestore: could not open file $TESTTMP/src/.hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020: HTTP Error 403: ssl required
   [255]
 
   $ rm .hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020
 
 Test coverage of 'missing from store':
 
   $ hg serve -R ../mirror -d -p $HGPORT2 --pid-file hg.pid --config largefiles.usercache=$TESTTMP/mirrorcache --config "web.allow_push=*" --config web.push_ssl=no
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ hg push http://localhost:$HGPORT2 -f --config largefiles.usercache=nocache
   pushing to http://localhost:$HGPORT2/
   searching for changes
   abort: largefile e2fb5f2139d086ded2cb600d5a91a196e76bf020 missing from store (needs to be uploaded)
   [255]
 
 Verify that --lfrev controls which revisions are checked for largefiles to push
 
   $ hg push http://localhost:$HGPORT2 -f --config largefiles.usercache=nocache --lfrev tip
   pushing to http://localhost:$HGPORT2/
   searching for changes
   abort: largefile e2fb5f2139d086ded2cb600d5a91a196e76bf020 missing from store (needs to be uploaded)
   [255]
 
   $ hg push http://localhost:$HGPORT2 -f --config largefiles.usercache=nocache --lfrev null
   pushing to http://localhost:$HGPORT2/
   searching for changes
   remote: adding changesets
   remote: adding manifests
   remote: adding file changes
   remote: added 1 changesets with 1 changes to 1 files (+1 heads)
 
 #endif

tests/test-persistent-nodemap.t

@@ -1,1263 +1,1260 b''
 ===================================
 Test the persistent on-disk nodemap
 ===================================
 
 
   $ cat << EOF >> $HGRCPATH
   > [format]
   > use-share-safe=yes
   > [extensions]
   > share=
   > EOF
 
 #if no-rust
 
   $ cat << EOF >> $HGRCPATH
   > [format]
   > use-persistent-nodemap=yes
   > [devel]
   > persistent-nodemap=yes
   > EOF
 
 #endif
 
   $ hg init test-repo --config storage.revlog.persistent-nodemap.slow-path=allow
   $ cd test-repo
 
 Check handling of the default slow-path value
 
 #if no-pure no-rust
 
   $ hg id
   abort: accessing `persistent-nodemap` repository without associated fast implementation.
   (check `hg help config.format.use-persistent-nodemap` for details)
   [255]
 
 Unlock further check (we are here to test the feature)
 
   $ cat << EOF >> $HGRCPATH
   > [storage]
   > # to avoid spamming the test
   > revlog.persistent-nodemap.slow-path=allow
   > EOF
 
 #endif
 
 #if rust
 
 Regression test for a previous bug in Rust/C FFI for the `Revlog_CAPI` capsule:
 in places where `mercurial/cext/revlog.c` function signatures use `Py_ssize_t`
 (64 bits on Linux x86_64), corresponding declarations in `rust/hg-cpython/src/cindex.rs`
 incorrectly used `libc::c_int` (32 bits).
 As a result, -1 passed from Rust for the null revision became 4294967295 in C.
 
   $ hg log -r 00000000
   changeset:   -1:000000000000
   tag:         tip
   user:        
   date:        Thu Jan 01 00:00:00 1970 +0000
   
 
 #endif
 
 
   $ hg debugformat
   format-variant     repo
   fncache:            yes
   dirstate-v2:         no
   tracked-hint:        no
   dotencode:          yes
   generaldelta:       yes
   share-safe:         yes
   sparserevlog:       yes
   persistent-nodemap: yes
   copies-sdc:          no
   revlog-v2:           no
   changelog-v2:        no
   plain-cl-delta:     yes
   compression:        zlib (no-zstd !)
   compression:        zstd (zstd !)
   compression-level:  default
   $ hg debugbuilddag .+5000 --new-file
 
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5000
   tip-node: 6b02b8c7b96654c25e86ba69eda198d7e6ad8b3c
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
   $ f --size .hg/store/00changelog.n
   .hg/store/00changelog.n: size=62
 
 Simple lookup works
 
   $ ANYNODE=`hg log --template '{node|short}\n' --rev tip`
   $ hg log -r "$ANYNODE" --template '{rev}\n'
   5000
 
 
 #if rust
 
   $ f --sha256 .hg/store/00changelog-*.nd
   .hg/store/00changelog-????????.nd: sha256=2e029d3200bd1a986b32784fc2ef1a3bd60dc331f025718bcf5ff44d93f026fd (glob)
 
   $ f --sha256 .hg/store/00manifest-*.nd
   .hg/store/00manifest-????????.nd: sha256=97117b1c064ea2f86664a124589e47db0e254e8d34739b5c5cc5bf31c9da2b51 (glob)
   $ hg debugnodemap --dump-new | f --sha256 --size
   size=121088, sha256=2e029d3200bd1a986b32784fc2ef1a3bd60dc331f025718bcf5ff44d93f026fd
   $ hg debugnodemap --dump-disk | f --sha256 --bytes=256 --hexdump --size
   size=121088, sha256=2e029d3200bd1a986b32784fc2ef1a3bd60dc331f025718bcf5ff44d93f026fd
   0000: 00 00 00 91 00 00 00 20 00 00 00 bb 00 00 00 e7 |....... ........|
   0010: 00 00 00 66 00 00 00 a1 00 00 01 13 00 00 01 22 |...f..........."|
   0020: 00 00 00 23 00 00 00 fc 00 00 00 ba 00 00 00 5e |...#...........^|
   0030: 00 00 00 df 00 00 01 4e 00 00 01 65 00 00 00 ab |.......N...e....|
   0040: 00 00 00 a9 00 00 00 95 00 00 00 73 00 00 00 38 |...........s...8|
   0050: 00 00 00 cc 00 00 00 92 00 00 00 90 00 00 00 69 |...............i|
   0060: 00 00 00 ec 00 00 00 8d 00 00 01 4f 00 00 00 12 |...........O....|
   0070: 00 00 02 0c 00 00 00 77 00 00 00 9c 00 00 00 8f |.......w........|
   0080: 00 00 00 d5 00 00 00 6b 00 00 00 48 00 00 00 b3 |.......k...H....|
   0090: 00 00 00 e5 00 00 00 b5 00 00 00 8e 00 00 00 ad |................|
   00a0: 00 00 00 7b 00 00 00 7c 00 00 00 0b 00 00 00 2b |...{...|.......+|
   00b0: 00 00 00 c6 00 00 00 1e 00 00 01 08 00 00 00 11 |................|
   00c0: 00 00 01 30 00 00 00 26 00 00 01 9c 00 00 00 35 |...0...&.......5|
   00d0: 00 00 00 b8 00 00 01 31 00 00 00 2c 00 00 00 55 |.......1...,...U|
   00e0: 00 00 00 8a 00 00 00 9a 00 00 00 0c 00 00 01 1e |................|
   00f0: 00 00 00 a4 00 00 00 83 00 00 00 c9 00 00 00 8c |................|
 
 
 #else
 
   $ f --sha256 .hg/store/00changelog-*.nd
   .hg/store/00changelog-????????.nd: sha256=f544f5462ff46097432caf6d764091f6d8c46d6121be315ead8576d548c9dd79 (glob)
   $ hg debugnodemap --dump-new | f --sha256 --size
   size=121088, sha256=f544f5462ff46097432caf6d764091f6d8c46d6121be315ead8576d548c9dd79
   $ hg debugnodemap --dump-disk | f --sha256 --bytes=256 --hexdump --size
   size=121088, sha256=f544f5462ff46097432caf6d764091f6d8c46d6121be315ead8576d548c9dd79
   0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
   0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
   0020: ff ff ff ff ff ff f5 06 ff ff ff ff ff ff f3 e7 |................|
   0030: ff ff ef ca ff ff ff ff ff ff ff ff ff ff ff ff |................|
   0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
   0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ed 08 |................|
   0060: ff ff ed 66 ff ff ff ff ff ff ff ff ff ff ff ff |...f............|
   0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
   0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
   0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff f6 ed |................|
   00a0: ff ff ff ff ff ff fe 61 ff ff ff ff ff ff ff ff |.......a........|
   00b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
   00c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
   00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
   00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff f1 02 |................|
   00f0: ff ff ff ff ff ff ed 1b ff ff ff ff ff ff ff ff |................|
 
 #endif
 
   $ hg debugnodemap --check
   revision in index:   5001
   revision in nodemap: 5001
 
 add a new commit
 
   $ hg up
   5001 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo foo > foo
   $ hg add foo
 
 
 Check slow-path config value handling
 -------------------------------------
 
 #if no-pure no-rust
 
   $ hg id --config "storage.revlog.persistent-nodemap.slow-path=invalid-value"
   unknown value for config "storage.revlog.persistent-nodemap.slow-path": "invalid-value"
   falling back to default value: abort
   abort: accessing `persistent-nodemap` repository without associated fast implementation.
   (check `hg help config.format.use-persistent-nodemap` for details)
   [255]
 
   $ hg log -r . --config "storage.revlog.persistent-nodemap.slow-path=warn"
   warning: accessing `persistent-nodemap` repository without associated fast implementation.
   (check `hg help config.format.use-persistent-nodemap` for details)
   changeset:   5000:6b02b8c7b966
   tag:         tip
   user:        debugbuilddag
   date:        Thu Jan 01 01:23:20 1970 +0000
   summary:     r5000
   
   $ hg ci -m 'foo' --config "storage.revlog.persistent-nodemap.slow-path=abort"
   abort: accessing `persistent-nodemap` repository without associated fast implementation.
   (check `hg help config.format.use-persistent-nodemap` for details)
   [255]
 
 #else
 
   $ hg id --config "storage.revlog.persistent-nodemap.slow-path=invalid-value"
   unknown value for config "storage.revlog.persistent-nodemap.slow-path": "invalid-value"
   falling back to default value: abort
   6b02b8c7b966+ tip
 
 #endif
 
   $ hg ci -m 'foo'
 
 #if no-pure no-rust
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5001
   tip-node: 16395c3cf7e231394735e6b1717823ada303fb0c
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 #else
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5001
   tip-node: 16395c3cf7e231394735e6b1717823ada303fb0c
   data-length: 121344
   data-unused: 256
   data-unused: 0.211%
 #endif
 
   $ f --size .hg/store/00changelog.n
   .hg/store/00changelog.n: size=62
 
 (The pure code use the debug code that perform incremental update, the C code reencode from scratch)
 
 #if pure
   $ f --sha256 .hg/store/00changelog-*.nd --size
   .hg/store/00changelog-????????.nd: size=121344, sha256=cce54c5da5bde3ad72a4938673ed4064c86231b9c64376b082b163fdb20f8f66 (glob)
 #endif
 
 #if rust
   $ f --sha256 .hg/store/00changelog-*.nd --size
   .hg/store/00changelog-????????.nd: size=121344, sha256=952b042fcf614ceb37b542b1b723e04f18f83efe99bee4e0f5ccd232ef470e58 (glob)
 #endif
 
 #if no-pure no-rust
   $ f --sha256 .hg/store/00changelog-*.nd --size
   .hg/store/00changelog-????????.nd: size=121088, sha256=df7c06a035b96cb28c7287d349d603baef43240be7736fe34eea419a49702e17 (glob)
 #endif
 
   $ hg debugnodemap --check
   revision in index:   5002
   revision in nodemap: 5002
 
 Test code path without mmap
 ---------------------------
 
   $ echo bar > bar
   $ hg add bar
   $ hg ci -m 'bar' --config storage.revlog.persistent-nodemap.mmap=no
 
   $ hg debugnodemap --check --config storage.revlog.persistent-nodemap.mmap=yes
   revision in index:   5003
   revision in nodemap: 5003
   $ hg debugnodemap --check --config storage.revlog.persistent-nodemap.mmap=no
   revision in index:   5003
   revision in nodemap: 5003
 
 
 #if pure
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5002
   tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
   data-length: 121600
   data-unused: 512
   data-unused: 0.421%
   $ f --sha256 .hg/store/00changelog-*.nd --size
   .hg/store/00changelog-????????.nd: size=121600, sha256=def52503d049ccb823974af313a98a935319ba61f40f3aa06a8be4d35c215054 (glob)
 #endif
 #if rust
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5002
   tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
   data-length: 121600
   data-unused: 512
   data-unused: 0.421%
   $ f --sha256 .hg/store/00changelog-*.nd --size
   .hg/store/00changelog-????????.nd: size=121600, sha256=dacf5b5f1d4585fee7527d0e67cad5b1ba0930e6a0928f650f779aefb04ce3fb (glob)
 #endif
 #if no-pure no-rust
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5002
   tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
   $ f --sha256 .hg/store/00changelog-*.nd --size
   .hg/store/00changelog-????????.nd: size=121088, sha256=59fcede3e3cc587755916ceed29e3c33748cd1aa7d2f91828ac83e7979d935e8 (glob)
 #endif
 
 Test force warming the cache
 
   $ rm .hg/store/00changelog.n
   $ hg debugnodemap --metadata
   $ hg debugupdatecache
 #if pure
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5002
   tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 #else
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5002
   tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 #endif
 
 Check out of sync nodemap
 =========================
 
 First copy old data on the side.
 
   $ mkdir ../tmp-copies
   $ cp .hg/store/00changelog-????????.nd .hg/store/00changelog.n ../tmp-copies
 
 Nodemap lagging behind
 ----------------------
 
 make a new commit
 
   $ echo bar2 > bar
   $ hg ci -m 'bar2'
   $ NODE=`hg log -r tip -T '{node}\n'`
   $ hg log -r "$NODE" -T '{rev}\n'
   5003
 
 If the nodemap is lagging behind, it can catch up fine
 
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5003
   tip-node: c9329770f979ade2d16912267c38ba5f82fd37b3
   data-length: 121344 (pure !)
   data-length: 121344 (rust !)
   data-length: 121152 (no-rust no-pure !)
   data-unused: 192 (pure !)
   data-unused: 192 (rust !)
   data-unused: 0 (no-rust no-pure !)
   data-unused: 0.158% (pure !)
   data-unused: 0.158% (rust !)
   data-unused: 0.000% (no-rust no-pure !)
   $ cp -f ../tmp-copies/* .hg/store/
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5002
   tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
   $ hg log -r "$NODE" -T '{rev}\n'
   5003
 
 changelog altered
 -----------------
 
 If the nodemap is not gated behind a requirements, an unaware client can alter
 the repository so the revlog used to generate the nodemap is not longer
 compatible with the persistent nodemap. We need to detect that.
 
   $ hg up "$NODE~5"
   0 files updated, 0 files merged, 4 files removed, 0 files unresolved
   $ echo bar > babar
   $ hg add babar
   $ hg ci -m 'babar'
   created new head
   $ OTHERNODE=`hg log -r tip -T '{node}\n'`
   $ hg log -r "$OTHERNODE" -T '{rev}\n'
   5004
 
   $ hg --config extensions.strip= strip --rev "$NODE~1" --no-backup
 
 the nodemap should detect the changelog have been tampered with and recover.
 
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5002
   tip-node: b355ef8adce0949b8bdf6afc72ca853740d65944
   data-length: 121536 (pure !)
   data-length: 121088 (rust !)
   data-length: 121088 (no-pure no-rust !)
   data-unused: 448 (pure !)
   data-unused: 0 (rust !)
   data-unused: 0 (no-pure no-rust !)
   data-unused: 0.000% (rust !)
   data-unused: 0.369% (pure !)
   data-unused: 0.000% (no-pure no-rust !)
 
   $ cp -f ../tmp-copies/* .hg/store/
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5002
   tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
   $ hg log -r "$OTHERNODE" -T '{rev}\n'
   5002
 
 missing data file
 -----------------
 
   $ UUID=`hg debugnodemap --metadata| grep 'uid:' | \
   > sed 's/uid: //'`
   $ FILE=.hg/store/00changelog-"${UUID}".nd
   $ mv $FILE ../tmp-data-file
   $ cp .hg/store/00changelog.n ../tmp-docket
 
 mercurial don't crash
 
   $ hg log -r .
   changeset:   5002:b355ef8adce0
   tag:         tip
   parent:      4998:d918ad6d18d3
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     babar
   
   $ hg debugnodemap --metadata
 
   $ hg debugupdatecache
   $ hg debugnodemap --metadata
   uid: * (glob)
   tip-rev: 5002
   tip-node: b355ef8adce0949b8bdf6afc72ca853740d65944
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
   $ mv ../tmp-data-file $FILE
   $ mv ../tmp-docket .hg/store/00changelog.n
 
 Check transaction related property
 ==================================
 
 An up to date nodemap should be available to shell hooks,
 
   $ echo dsljfl > a
   $ hg add a
   $ hg ci -m a
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5003
   tip-node: a52c5079765b5865d97b993b303a18740113bbb2
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
   $ echo babar2 > babar
   $ hg ci -m 'babar2' --config "hooks.pretxnclose.nodemap-test=hg debugnodemap --metadata"
   uid: ???????? (glob)
   tip-rev: 5004
   tip-node: 2f5fb1c06a16834c5679d672e90da7c5f3b1a984
   data-length: 121280 (pure !)
   data-length: 121280 (rust !)
   data-length: 121088 (no-pure no-rust !)
   data-unused: 192 (pure !)
   data-unused: 192 (rust !)
   data-unused: 0 (no-pure no-rust !)
   data-unused: 0.158% (pure !)
   data-unused: 0.158% (rust !)
   data-unused: 0.000% (no-pure no-rust !)
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5004
   tip-node: 2f5fb1c06a16834c5679d672e90da7c5f3b1a984
   data-length: 121280 (pure !)
   data-length: 121280 (rust !)
   data-length: 121088 (no-pure no-rust !)
   data-unused: 192 (pure !)
   data-unused: 192 (rust !)
   data-unused: 0 (no-pure no-rust !)
   data-unused: 0.158% (pure !)
   data-unused: 0.158% (rust !)
   data-unused: 0.000% (no-pure no-rust !)
 
 Another process does not see the pending nodemap content during run.
 
   $ echo qpoasp > a
   $ hg ci -m a2 \
   > --config "hooks.pretxnclose=sh \"$RUNTESTDIR/testlib/wait-on-file\" 20 sync-repo-read sync-txn-pending" \
   > --config "hooks.txnclose=touch sync-txn-close" > output.txt 2>&1 &
 
 (read the repository while the commit transaction is pending)
 
   $ sh "$RUNTESTDIR/testlib/wait-on-file" 20 sync-txn-pending && \
   > hg debugnodemap --metadata && \
   > sh "$RUNTESTDIR/testlib/wait-on-file" 20 sync-txn-close sync-repo-read
   uid: ???????? (glob)
   tip-rev: 5004
   tip-node: 2f5fb1c06a16834c5679d672e90da7c5f3b1a984
   data-length: 121280 (pure !)
   data-length: 121280 (rust !)
   data-length: 121088 (no-pure no-rust !)
   data-unused: 192 (pure !)
   data-unused: 192 (rust !)
   data-unused: 0 (no-pure no-rust !)
   data-unused: 0.158% (pure !)
   data-unused: 0.158% (rust !)
   data-unused: 0.000% (no-pure no-rust !)
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121536 (pure !)
   data-length: 121536 (rust !)
   data-length: 121088 (no-pure no-rust !)
   data-unused: 448 (pure !)
   data-unused: 448 (rust !)
   data-unused: 0 (no-pure no-rust !)
   data-unused: 0.369% (pure !)
   data-unused: 0.369% (rust !)
   data-unused: 0.000% (no-pure no-rust !)
 
   $ cat output.txt
 
 Check that a failing transaction will properly revert the data
 
   $ echo plakfe > a
   $ f --size --sha256 .hg/store/00changelog-*.nd
   .hg/store/00changelog-????????.nd: size=121536, sha256=bb414468d225cf52d69132e1237afba34d4346ee2eb81b505027e6197b107f03 (glob) (pure !)
   .hg/store/00changelog-????????.nd: size=121536, sha256=909ac727bc4d1c0fda5f7bff3c620c98bd4a2967c143405a1503439e33b377da (glob) (rust !)
   .hg/store/00changelog-????????.nd: size=121088, sha256=342d36d30d86dde67d3cb6c002606c4a75bcad665595d941493845066d9c8ee0 (glob) (no-pure no-rust !)
   $ hg ci -m a3 --config "extensions.abort=$RUNTESTDIR/testlib/crash_transaction_late.py"
   transaction abort!
   rollback completed
   abort: This is a late abort
   [255]
   $ hg debugnodemap --metadata
   uid: ???????? (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121536 (pure !)
   data-length: 121536 (rust !)
   data-length: 121088 (no-pure no-rust !)
   data-unused: 448 (pure !)
   data-unused: 448 (rust !)
   data-unused: 0 (no-pure no-rust !)
   data-unused: 0.369% (pure !)
   data-unused: 0.369% (rust !)
   data-unused: 0.000% (no-pure no-rust !)
   $ f --size --sha256 .hg/store/00changelog-*.nd
   .hg/store/00changelog-????????.nd: size=121536, sha256=bb414468d225cf52d69132e1237afba34d4346ee2eb81b505027e6197b107f03 (glob) (pure !)
   .hg/store/00changelog-????????.nd: size=121536, sha256=909ac727bc4d1c0fda5f7bff3c620c98bd4a2967c143405a1503439e33b377da (glob) (rust !)
   .hg/store/00changelog-????????.nd: size=121088, sha256=342d36d30d86dde67d3cb6c002606c4a75bcad665595d941493845066d9c8ee0 (glob) (no-pure no-rust !)
 
 Check that removing content does not confuse the nodemap
 --------------------------------------------------------
 
 removing data with rollback
 
   $ echo aso > a
   $ hg ci -m a4
   $ hg rollback
   repository tip rolled back to revision 5005 (undo commit)
   working directory now based on revision 5005
   $ hg id -r .
   90d5d3ba2fc4 tip
 
 removing data with strip
 
   $ echo aso > a
   $ hg ci -m a4
   $ hg --config extensions.strip= strip -r . --no-backup
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg id -r . --traceback
   90d5d3ba2fc4 tip
 
 (be a good citizen and regenerate the nodemap)
   $ hg debugupdatecaches
   $ hg debugnodemap --metadata
   uid: * (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 
 Check race condition when multiple process write new data to the repository
 ---------------------------------------------------------------------------
 
 In this test, we check that two writers touching the repositories will not
 overwrite each other data. This test is prompted by the existent of issue6554.
 Where a writer ended up using and outdated docket to update the repository. See
 the dedicated extension for details on the race windows and read/write schedule
 necessary to end up in this situation: testlib/persistent-nodemap-race-ext.py
 
 The issue was initially observed on a server with a high push trafic, but it
 can be reproduced using a share and two commiting process which seems simpler.
 
 The test is Rust only as the other implementation does not use the same
 read/write patterns.
 
   $ cd ..
 
 #if rust
 
   $ cp -R test-repo race-repo
   $ hg share race-repo ./other-wc --config format.use-share-safe=yes
   updating working directory
   5001 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg debugformat -R ./race-repo | egrep 'share-safe|persistent-nodemap'
   share-safe:         yes
   persistent-nodemap: yes
   $ hg debugformat -R ./other-wc/ | egrep 'share-safe|persistent-nodemap'
   share-safe:         yes
   persistent-nodemap: yes
   $ hg -R ./other-wc update 'min(head())'
   3 files updated, 0 files merged, 2 files removed, 0 files unresolved
   $ hg -R ./race-repo debugnodemap --metadata
   uid: 43c37dde
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
   $ hg -R ./race-repo log -G -r 'head()'
   @  changeset:   5005:90d5d3ba2fc4
   |  tag:         tip
   ~  user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     a2
   
   o  changeset:   5001:16395c3cf7e2
   |  user:        test
   ~  date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     foo
   
   $ hg -R ./other-wc log -G -r 'head()'
   o  changeset:   5005:90d5d3ba2fc4
   |  tag:         tip
   ~  user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     a2
   
   @  changeset:   5001:16395c3cf7e2
   |  user:        test
   ~  date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     foo
   
   $ echo left-side-race > race-repo/left-side-race
   $ hg -R ./race-repo/ add race-repo/left-side-race
 
   $ echo right-side-race > ./other-wc/right-side-race
   $ hg -R ./other-wc/ add ./other-wc/right-side-race
 
   $ mkdir sync-files
   $ mkdir outputs
   $ (
   >    hg -R ./race-repo/ commit -m left-side-commit \
   >    --config "extensions.race=${RUNTESTDIR}/testlib/persistent-nodemap-race-ext.py" \
   >    --config 'devel.nodemap-race.role=left';
   >    touch sync-files/left-done
   > ) > outputs/left.txt 2>&1 &
   $ (
   >    hg -R ./other-wc/ commit -m right-side-commit \
   >    --config "extensions.race=${RUNTESTDIR}/testlib/persistent-nodemap-race-ext.py" \
   >    --config 'devel.nodemap-race.role=right';
   >    touch sync-files/right-done
   > ) > outputs/right.txt 2>&1 &
   $ (
   >    hg -R ./race-repo/ check-nodemap-race \
   >    --config "extensions.race=${RUNTESTDIR}/testlib/persistent-nodemap-race-ext.py" \
   >    --config 'devel.nodemap-race.role=reader';
   >    touch sync-files/reader-done
   > ) > outputs/reader.txt 2>&1 &
   $ sh "$RUNTESTDIR"/testlib/wait-on-file 10 sync-files/left-done
   $ cat outputs/left.txt
   docket-details:
     uid:         43c37dde
     actual-tip:  5005
     tip-rev:     5005
     data-length: 121088
   nodemap-race: left side locked and ready to commit
   docket-details:
     uid:         43c37dde
     actual-tip:  5005
     tip-rev:     5005
     data-length: 121088
   finalized changelog write
   persisting changelog nodemap
     new data start at 121088
   persisted changelog nodemap
   docket-details:
     uid:         43c37dde
     actual-tip:  5006
     tip-rev:     5006
     data-length: 121280
   $ sh "$RUNTESTDIR"/testlib/wait-on-file 10 sync-files/right-done
   $ cat outputs/right.txt
   nodemap-race: right side start of the locking sequence
   nodemap-race: right side reading changelog
   nodemap-race: right side reading of changelog is done
   docket-details:
     uid:         43c37dde
     actual-tip:  5006
     tip-rev:     5005
     data-length: 121088
   nodemap-race: right side ready to wait for the lock
   nodemap-race: right side locked and ready to commit
   docket-details:
     uid:         43c37dde
     actual-tip:  5006
     tip-rev:     5006
     data-length: 121280
   right ready to write, waiting for reader
   right proceeding with writing its changelog index and nodemap
   finalized changelog write
   persisting changelog nodemap
     new data start at 121280
   persisted changelog nodemap
   docket-details:
     uid:         43c37dde
     actual-tip:  5007
     tip-rev:     5007
     data-length: 121536
   $ sh "$RUNTESTDIR"/testlib/wait-on-file 10 sync-files/reader-done
   $ cat outputs/reader.txt
   reader: reading changelog
   reader ready to read the changelog, waiting for right
   reader: nodemap docket read
   record-data-length: 121280
   actual-data-length: 121280
   file-actual-length: 121536
   reader: changelog read
   docket-details:
     uid:         43c37dde
     actual-tip:  5006
     tip-rev:     5006
     data-length: 121280
   tip-rev:  5006
   tip-node: 492901161367
   node-rev: 5006
 
   $ hg -R ./race-repo log -G -r 'head()'
   o  changeset:   5007:ac4a2abde241
   |  tag:         tip
   ~  parent:      5001:16395c3cf7e2
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     right-side-commit
   
   @  changeset:   5006:492901161367
   |  user:        test
   ~  date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     left-side-commit
   
   $ hg -R ./other-wc log -G -r 'head()'
   @  changeset:   5007:ac4a2abde241
   |  tag:         tip
   ~  parent:      5001:16395c3cf7e2
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     right-side-commit
   
   o  changeset:   5006:492901161367
   |  user:        test
   ~  date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     left-side-commit
   
 #endif
 
 Test upgrade / downgrade
 ========================
 
   $ cd ./test-repo/
 
 downgrading
 
   $ cat << EOF >> .hg/hgrc
   > [format]
   > use-persistent-nodemap=no
   > EOF
   $ hg debugformat -v
   format-variant     repo config default
   fncache:            yes    yes     yes
   dirstate-v2:         no     no      no
   tracked-hint:        no     no      no
   dotencode:          yes    yes     yes
   generaldelta:       yes    yes     yes
   share-safe:         yes    yes     yes
   sparserevlog:       yes    yes     yes
   persistent-nodemap: yes     no      no
   copies-sdc:          no     no      no
   revlog-v2:           no     no      no
   changelog-v2:        no     no      no
   plain-cl-delta:     yes    yes     yes
   compression:        zlib   zlib    zlib (no-zstd !)
   compression:        zstd   zstd    zstd (zstd !)
   compression-level:  default default default
   $ hg debugupgraderepo --run --no-backup --quiet
   upgrade will perform the following actions:
   
   requirements
      preserved: dotencode, fncache, generaldelta, revlogv1, share-safe, sparserevlog, store (no-zstd no-dirstate-v2 !)
      preserved: dotencode, fncache, generaldelta, revlog-compression-zstd, revlogv1, share-safe, sparserevlog, store (zstd no-dirstate-v2 !)
      preserved: dotencode, use-dirstate-v2, fncache, generaldelta, revlog-compression-zstd, revlogv1, share-safe, sparserevlog, store (zstd dirstate-v2 !)
      removed: persistent-nodemap
   
   processed revlogs:
     - all-filelogs
     - changelog
     - manifest
   
   $ ls -1 .hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
-  undo.backup.00changelog.n
-  undo.backup.00manifest.n
+  [1]
   $ hg debugnodemap --metadata
 
 
 upgrading
 
   $ cat << EOF >> .hg/hgrc
   > [format]
   > use-persistent-nodemap=yes
   > EOF
   $ hg debugformat -v
   format-variant     repo config default
   fncache:            yes    yes     yes
   dirstate-v2:         no     no      no
   tracked-hint:        no     no      no
   dotencode:          yes    yes     yes
   generaldelta:       yes    yes     yes
   share-safe:         yes    yes     yes
   sparserevlog:       yes    yes     yes
   persistent-nodemap:  no    yes      no
   copies-sdc:          no     no      no
   revlog-v2:           no     no      no
   changelog-v2:        no     no      no
   plain-cl-delta:     yes    yes     yes
   compression:        zlib   zlib    zlib (no-zstd !)
   compression:        zstd   zstd    zstd (zstd !)
   compression-level:  default default default
   $ hg debugupgraderepo --run --no-backup --quiet
   upgrade will perform the following actions:
   
   requirements
      preserved: dotencode, fncache, generaldelta, revlogv1, share-safe, sparserevlog, store (no-zstd no-dirstate-v2 !)
      preserved: dotencode, fncache, generaldelta, revlog-compression-zstd, revlogv1, share-safe, sparserevlog, store (zstd no-dirstate-v2 !)
      preserved: dotencode, use-dirstate-v2, fncache, generaldelta, revlog-compression-zstd, revlogv1, share-safe, sparserevlog, store (zstd dirstate-v2 !)
      added: persistent-nodemap
   
   processed revlogs:
     - all-filelogs
     - changelog
     - manifest
   
   $ ls -1 .hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
   00changelog-*.nd (glob)
   00changelog.n
   00manifest-*.nd (glob)
   00manifest.n
-  undo.backup.00changelog.n
-  undo.backup.00manifest.n
 
   $ hg debugnodemap --metadata
   uid: * (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 
 Running unrelated upgrade
 
   $ hg debugupgraderepo --run --no-backup --quiet --optimize re-delta-all
   upgrade will perform the following actions:
   
   requirements
      preserved: dotencode, fncache, generaldelta, persistent-nodemap, revlogv1, share-safe, sparserevlog, store (no-zstd no-dirstate-v2 !)
      preserved: dotencode, fncache, generaldelta, persistent-nodemap, revlog-compression-zstd, revlogv1, share-safe, sparserevlog, store (zstd no-dirstate-v2 !)
      preserved: dotencode, use-dirstate-v2, fncache, generaldelta, persistent-nodemap, revlog-compression-zstd, revlogv1, share-safe, sparserevlog, store (zstd dirstate-v2 !)
   
   optimisations: re-delta-all
   
   processed revlogs:
     - all-filelogs
     - changelog
     - manifest
   
   $ ls -1 .hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
   00changelog-*.nd (glob)
   00changelog.n
   00manifest-*.nd (glob)
   00manifest.n
 
   $ hg debugnodemap --metadata
   uid: * (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 
 Persistent nodemap and local/streaming clone
 ============================================
 
   $ cd ..
 
 standard clone
 --------------
 
 The persistent nodemap should exist after a streaming clone
 
   $ hg clone --pull --quiet -U test-repo standard-clone
   $ ls -1 standard-clone/.hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
   00changelog-*.nd (glob)
   00changelog.n
   00manifest-*.nd (glob)
   00manifest.n
   $ hg -R standard-clone debugnodemap --metadata
   uid: * (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 
 
 local clone
 ------------
 
 The persistent nodemap should exist after a streaming clone
 
   $ hg clone -U test-repo local-clone
   $ ls -1 local-clone/.hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
   00changelog-*.nd (glob)
   00changelog.n
   00manifest-*.nd (glob)
   00manifest.n
   $ hg -R local-clone debugnodemap --metadata
   uid: * (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 
 Test various corruption case
 ============================
 
 Missing datafile
 ----------------
 
 Test behavior with a missing datafile
 
   $ hg clone --quiet --pull test-repo corruption-test-repo
   $ ls -1 corruption-test-repo/.hg/store/00changelog*
   corruption-test-repo/.hg/store/00changelog-*.nd (glob)
   corruption-test-repo/.hg/store/00changelog.d
   corruption-test-repo/.hg/store/00changelog.i
   corruption-test-repo/.hg/store/00changelog.n
   $ rm corruption-test-repo/.hg/store/00changelog*.nd
   $ hg log -R corruption-test-repo -r .
   changeset:   5005:90d5d3ba2fc4
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     a2
   
   $ ls -1 corruption-test-repo/.hg/store/00changelog*
   corruption-test-repo/.hg/store/00changelog.d
   corruption-test-repo/.hg/store/00changelog.i
   corruption-test-repo/.hg/store/00changelog.n
 
 Truncated data file
 -------------------
 
 Test behavior with a too short datafile
 
 rebuild the missing data
   $ hg -R corruption-test-repo debugupdatecache
   $ ls -1 corruption-test-repo/.hg/store/00changelog*
   corruption-test-repo/.hg/store/00changelog-*.nd (glob)
   corruption-test-repo/.hg/store/00changelog.d
   corruption-test-repo/.hg/store/00changelog.i
   corruption-test-repo/.hg/store/00changelog.n
 
 truncate the file
 
   $ datafilepath=`ls corruption-test-repo/.hg/store/00changelog*.nd`
   $ f -s $datafilepath
   corruption-test-repo/.hg/store/00changelog-*.nd: size=121088 (glob)
   $ dd if=$datafilepath bs=1000 count=10 of=$datafilepath-tmp
   10+0 records in
   10+0 records out
   * bytes * (glob)
   $ mv $datafilepath-tmp $datafilepath
   $ f -s $datafilepath
   corruption-test-repo/.hg/store/00changelog-*.nd: size=10000 (glob)
 
 Check that Mercurial reaction to this event
 
   $ hg -R corruption-test-repo log -r . --traceback
   changeset:   5005:90d5d3ba2fc4
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     a2
   
 
 
 stream clone
 ============
 
 The persistent nodemap should exist after a streaming clone
 
 Simple case
 -----------
 
 No race condition
 
   $ hg clone -U --stream ssh://user@dummy/test-repo stream-clone --debug | egrep '00(changelog|manifest)'
   adding [s] 00manifest.n (62 bytes)
   adding [s] 00manifest-*.nd (118 KB) (glob)
   adding [s] 00changelog.n (62 bytes)
   adding [s] 00changelog-*.nd (118 KB) (glob)
   adding [s] 00manifest.d (452 KB) (no-zstd !)
   adding [s] 00manifest.d (491 KB) (zstd no-bigendian !)
   adding [s] 00manifest.d (492 KB) (zstd bigendian !)
   adding [s] 00changelog.d (360 KB) (no-zstd !)
   adding [s] 00changelog.d (368 KB) (zstd !)
   adding [s] 00manifest.i (313 KB)
   adding [s] 00changelog.i (313 KB)
   $ ls -1 stream-clone/.hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
   00changelog-*.nd (glob)
   00changelog.n
   00manifest-*.nd (glob)
   00manifest.n
   $ hg -R stream-clone debugnodemap --metadata
   uid: * (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 
 new data appened
 -----------------
 
 Other commit happening on the server during the stream clone
 
 setup the step-by-step stream cloning
 
   $ HG_TEST_STREAM_WALKED_FILE_1="$TESTTMP/sync_file_walked_1"
   $ export HG_TEST_STREAM_WALKED_FILE_1
   $ HG_TEST_STREAM_WALKED_FILE_2="$TESTTMP/sync_file_walked_2"
   $ export HG_TEST_STREAM_WALKED_FILE_2
   $ HG_TEST_STREAM_WALKED_FILE_3="$TESTTMP/sync_file_walked_3"
   $ export HG_TEST_STREAM_WALKED_FILE_3
   $ cat << EOF >> test-repo/.hg/hgrc
   > [extensions]
   > steps=$RUNTESTDIR/testlib/ext-stream-clone-steps.py
   > EOF
 
 Check and record file state beforehand
 
   $ f --size test-repo/.hg/store/00changelog*
   test-repo/.hg/store/00changelog-*.nd: size=121088 (glob)
   test-repo/.hg/store/00changelog.d: size=376891 (zstd no-bigendian !)
   test-repo/.hg/store/00changelog.d: size=376889 (zstd bigendian !)
   test-repo/.hg/store/00changelog.d: size=368890 (no-zstd !)
   test-repo/.hg/store/00changelog.i: size=320384
   test-repo/.hg/store/00changelog.n: size=62
   $ hg -R test-repo debugnodemap --metadata | tee server-metadata.txt
   uid: * (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 
 Prepare a commit
 
   $ echo foo >> test-repo/foo
   $ hg -R test-repo/ add test-repo/foo
 
 Do a mix of clone and commit at the same time so that the file listed on disk differ at actual transfer time.
 
   $ (hg clone -U --stream ssh://user@dummy/test-repo stream-clone-race-1 --debug 2>> clone-output | egrep '00(changelog|manifest)' >> clone-output; touch $HG_TEST_STREAM_WALKED_FILE_3) &
   $ $RUNTESTDIR/testlib/wait-on-file 10 $HG_TEST_STREAM_WALKED_FILE_1
   $ hg -R test-repo/ commit -m foo
   $ touch $HG_TEST_STREAM_WALKED_FILE_2
   $ $RUNTESTDIR/testlib/wait-on-file 10 $HG_TEST_STREAM_WALKED_FILE_3
   $ cat clone-output
   adding [s] 00manifest.n (62 bytes)
   adding [s] 00manifest-*.nd (118 KB) (glob)
   adding [s] 00changelog.n (62 bytes)
   adding [s] 00changelog-*.nd (118 KB) (glob)
   adding [s] 00manifest.d (452 KB) (no-zstd !)
   adding [s] 00manifest.d (491 KB) (zstd no-bigendian !)
   adding [s] 00manifest.d (492 KB) (zstd bigendian !)
   adding [s] 00changelog.d (360 KB) (no-zstd !)
   adding [s] 00changelog.d (368 KB) (zstd !)
   adding [s] 00manifest.i (313 KB)
   adding [s] 00changelog.i (313 KB)
 
 Check the result state
 
   $ f --size stream-clone-race-1/.hg/store/00changelog*
   stream-clone-race-1/.hg/store/00changelog-*.nd: size=121088 (glob)
   stream-clone-race-1/.hg/store/00changelog.d: size=368890 (no-zstd !)
   stream-clone-race-1/.hg/store/00changelog.d: size=376891 (zstd no-bigendian !)
   stream-clone-race-1/.hg/store/00changelog.d: size=376889 (zstd bigendian !)
   stream-clone-race-1/.hg/store/00changelog.i: size=320384
   stream-clone-race-1/.hg/store/00changelog.n: size=62
 
   $ hg -R stream-clone-race-1 debugnodemap --metadata | tee client-metadata.txt
   uid: * (glob)
   tip-rev: 5005
   tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
   data-length: 121088
   data-unused: 0
   data-unused: 0.000%
 
 We get a usable nodemap, so no rewrite would be needed and the metadata should be identical
 (ie: the following diff should be empty)
 
 This isn't the case for the `no-rust` `no-pure` implementation as it use a very minimal nodemap implementation that unconditionnaly rewrite the nodemap "all the time".
 
 #if no-rust no-pure
   $ diff -u server-metadata.txt client-metadata.txt
   --- server-metadata.txt	* (glob)
   +++ client-metadata.txt	* (glob)
   @@ -1,4 +1,4 @@
   -uid: * (glob)
   +uid: * (glob)
    tip-rev: 5005
    tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
    data-length: 121088
   [1]
 #else
   $ diff -u server-metadata.txt client-metadata.txt
 #endif
 
 
 Clean up after the test.
 
   $ rm -f "$HG_TEST_STREAM_WALKED_FILE_1"
   $ rm -f "$HG_TEST_STREAM_WALKED_FILE_2"
   $ rm -f "$HG_TEST_STREAM_WALKED_FILE_3"
 
 full regeneration
 -----------------
 
 A full nodemap is generated
 
 (ideally this test would append enough data to make sure the nodemap data file
 get changed, however to make thing simpler we will force the regeneration for
 this test.
 
 Check the initial state
 
   $ f --size test-repo/.hg/store/00changelog*
   test-repo/.hg/store/00changelog-*.nd: size=121344 (glob) (rust !)
   test-repo/.hg/store/00changelog-*.nd: size=121344 (glob) (pure !)
   test-repo/.hg/store/00changelog-*.nd: size=121152 (glob) (no-rust no-pure !)
   test-repo/.hg/store/00changelog.d: size=376950 (zstd no-bigendian !)
   test-repo/.hg/store/00changelog.d: size=376948 (zstd bigendian !)
   test-repo/.hg/store/00changelog.d: size=368949 (no-zstd !)
   test-repo/.hg/store/00changelog.i: size=320448
   test-repo/.hg/store/00changelog.n: size=62
   $ hg -R test-repo debugnodemap --metadata | tee server-metadata-2.txt
   uid: * (glob)
   tip-rev: 5006
   tip-node: ed2ec1eef9aa2a0ec5057c51483bc148d03e810b
   data-length: 121344 (rust !)
   data-length: 121344 (pure !)
   data-length: 121152 (no-rust no-pure !)
   data-unused: 192 (rust !)
   data-unused: 192 (pure !)
   data-unused: 0 (no-rust no-pure !)
   data-unused: 0.158% (rust !)
   data-unused: 0.158% (pure !)
   data-unused: 0.000% (no-rust no-pure !)
 
 Performe the mix of clone and full refresh of the nodemap, so that the files
 (and filenames) are different between listing time and actual transfer time.
 
   $ (hg clone -U --stream ssh://user@dummy/test-repo stream-clone-race-2 --debug 2>> clone-output-2 | egrep '00(changelog|manifest)' >> clone-output-2; touch $HG_TEST_STREAM_WALKED_FILE_3) &
   $ $RUNTESTDIR/testlib/wait-on-file 10 $HG_TEST_STREAM_WALKED_FILE_1
   $ rm test-repo/.hg/store/00changelog.n
   $ rm test-repo/.hg/store/00changelog-*.nd
   $ hg -R test-repo/ debugupdatecache
   $ touch $HG_TEST_STREAM_WALKED_FILE_2
   $ $RUNTESTDIR/testlib/wait-on-file 10 $HG_TEST_STREAM_WALKED_FILE_3
 
 (note: the stream clone code wronly pick the `undo.` files)
 
   $ cat clone-output-2
   adding [s] undo.backup.00manifest.n (62 bytes) (known-bad-output !)
   adding [s] undo.backup.00changelog.n (62 bytes) (known-bad-output !)
   adding [s] 00manifest.n (62 bytes)
   adding [s] 00manifest-*.nd (118 KB) (glob)
   adding [s] 00changelog.n (62 bytes)
   adding [s] 00changelog-*.nd (118 KB) (glob)
   adding [s] 00manifest.d (492 KB) (zstd !)
   adding [s] 00manifest.d (452 KB) (no-zstd !)
   adding [s] 00changelog.d (360 KB) (no-zstd !)
   adding [s] 00changelog.d (368 KB) (zstd !)
   adding [s] 00manifest.i (313 KB)
   adding [s] 00changelog.i (313 KB)
 
 Check the result.
 
   $ f --size stream-clone-race-2/.hg/store/00changelog*
   stream-clone-race-2/.hg/store/00changelog-*.nd: size=121344 (glob) (rust !)
   stream-clone-race-2/.hg/store/00changelog-*.nd: size=121344 (glob) (pure !)
   stream-clone-race-2/.hg/store/00changelog-*.nd: size=121152 (glob) (no-rust no-pure !)
   stream-clone-race-2/.hg/store/00changelog.d: size=376950 (zstd no-bigendian !)
   stream-clone-race-2/.hg/store/00changelog.d: size=376948 (zstd bigendian !)
   stream-clone-race-2/.hg/store/00changelog.d: size=368949 (no-zstd !)
   stream-clone-race-2/.hg/store/00changelog.i: size=320448
   stream-clone-race-2/.hg/store/00changelog.n: size=62
 
   $ hg -R stream-clone-race-2 debugnodemap --metadata | tee client-metadata-2.txt
   uid: * (glob)
   tip-rev: 5006
   tip-node: ed2ec1eef9aa2a0ec5057c51483bc148d03e810b
   data-length: 121344 (rust !)
   data-unused: 192 (rust !)
   data-unused: 0.158% (rust !)
   data-length: 121152 (no-rust no-pure !)
   data-unused: 0 (no-rust no-pure !)
   data-unused: 0.000% (no-rust no-pure !)
   data-length: 121344 (pure !)
   data-unused: 192 (pure !)
   data-unused: 0.158% (pure !)
 
 We get a usable nodemap, so no rewrite would be needed and the metadata should be identical
 (ie: the following diff should be empty)
 
 This isn't the case for the `no-rust` `no-pure` implementation as it use a very minimal nodemap implementation that unconditionnaly rewrite the nodemap "all the time".
 
 #if no-rust no-pure
   $ diff -u server-metadata-2.txt client-metadata-2.txt
   --- server-metadata-2.txt	* (glob)
   +++ client-metadata-2.txt	* (glob)
   @@ -1,4 +1,4 @@
   -uid: * (glob)
   +uid: * (glob)
    tip-rev: 5006
    tip-node: ed2ec1eef9aa2a0ec5057c51483bc148d03e810b
    data-length: 121152
   [1]
 #else
   $ diff -u server-metadata-2.txt client-metadata-2.txt
 #endif
 
 Clean up after the test
 
   $ rm -f $HG_TEST_STREAM_WALKED_FILE_1
   $ rm -f $HG_TEST_STREAM_WALKED_FILE_2
   $ rm -f $HG_TEST_STREAM_WALKED_FILE_3