remotefilelog: fix what looks like a wrong refactoring

when various store functions started returning a revlog type as the
first element of the tuple.

Differential Revision: https://phab.mercurial-scm.org/D11243

hgext/remotefilelog/remotefilelogserver.py

@@ -1,441 +1,441
 # remotefilelogserver.py - server logic for a remotefilelog server
 #
 # Copyright 2013 Facebook, Inc.
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 from __future__ import absolute_import
 
 import errno
 import os
 import stat
 import time
 import zlib
 
 from mercurial.i18n import _
 from mercurial.node import bin, hex
 from mercurial.pycompat import open
 from mercurial import (
     changegroup,
     changelog,
     context,
     error,
     extensions,
     match,
     pycompat,
     scmutil,
     store,
     streamclone,
     util,
     wireprotoserver,
     wireprototypes,
     wireprotov1server,
 )
 from . import (
     constants,
     shallowutil,
 )
 
 _sshv1server = wireprotoserver.sshv1protocolhandler
 
 
 def setupserver(ui, repo):
     """Sets up a normal Mercurial repo so it can serve files to shallow repos."""
     onetimesetup(ui)
 
     # don't send files to shallow clients during pulls
     def generatefiles(
         orig, self, changedfiles, linknodes, commonrevs, source, *args, **kwargs
     ):
         caps = self._bundlecaps or []
         if constants.BUNDLE2_CAPABLITY in caps:
             # only send files that don't match the specified patterns
             includepattern = None
             excludepattern = None
             for cap in self._bundlecaps or []:
                 if cap.startswith(b"includepattern="):
                     includepattern = cap[len(b"includepattern=") :].split(b'\0')
                 elif cap.startswith(b"excludepattern="):
                     excludepattern = cap[len(b"excludepattern=") :].split(b'\0')
 
             m = match.always()
             if includepattern or excludepattern:
                 m = match.match(
                     repo.root, b'', None, includepattern, excludepattern
                 )
 
             changedfiles = list([f for f in changedfiles if not m(f)])
         return orig(
             self, changedfiles, linknodes, commonrevs, source, *args, **kwargs
         )
 
     extensions.wrapfunction(
         changegroup.cgpacker, b'generatefiles', generatefiles
     )
 
 
 onetime = False
 
 
 def onetimesetup(ui):
     """Configures the wireprotocol for both clients and servers."""
     global onetime
     if onetime:
         return
     onetime = True
 
     # support file content requests
     wireprotov1server.wireprotocommand(
         b'x_rfl_getflogheads', b'path', permission=b'pull'
     )(getflogheads)
     wireprotov1server.wireprotocommand(
         b'x_rfl_getfiles', b'', permission=b'pull'
     )(getfiles)
     wireprotov1server.wireprotocommand(
         b'x_rfl_getfile', b'file node', permission=b'pull'
     )(getfile)
 
     class streamstate(object):
         match = None
         shallowremote = False
         noflatmf = False
 
     state = streamstate()
 
     def stream_out_shallow(repo, proto, other):
         includepattern = None
         excludepattern = None
         raw = other.get(b'includepattern')
         if raw:
             includepattern = raw.split(b'\0')
         raw = other.get(b'excludepattern')
         if raw:
             excludepattern = raw.split(b'\0')
 
         oldshallow = state.shallowremote
         oldmatch = state.match
         oldnoflatmf = state.noflatmf
         try:
             state.shallowremote = True
             state.match = match.always()
             state.noflatmf = other.get(b'noflatmanifest') == b'True'
             if includepattern or excludepattern:
                 state.match = match.match(
                     repo.root, b'', None, includepattern, excludepattern
                 )
             streamres = wireprotov1server.stream(repo, proto)
 
             # Force the first value to execute, so the file list is computed
             # within the try/finally scope
             first = next(streamres.gen)
             second = next(streamres.gen)
 
             def gen():
                 yield first
                 yield second
                 for value in streamres.gen:
                     yield value
 
             return wireprototypes.streamres(gen())
         finally:
             state.shallowremote = oldshallow
             state.match = oldmatch
             state.noflatmf = oldnoflatmf
 
     wireprotov1server.commands[b'stream_out_shallow'] = (
         stream_out_shallow,
         b'*',
     )
 
     # don't clone filelogs to shallow clients
     def _walkstreamfiles(orig, repo, matcher=None):
         if state.shallowremote:
             # if we are shallow ourselves, stream our local commits
             if shallowutil.isenabled(repo):
                 striplen = len(repo.store.path) + 1
                 readdir = repo.store.rawvfs.readdir
                 visit = [os.path.join(repo.store.path, b'data')]
                 while visit:
                     p = visit.pop()
                     for f, kind, st in readdir(p, stat=True):
                         fp = p + b'/' + f
                         if kind == stat.S_IFREG:
                             if not fp.endswith(b'.i') and not fp.endswith(
                                 b'.d'
                             ):
                                 n = util.pconvert(fp[striplen:])
                                 d = store.decodedir(n)
                                 t = store.FILETYPE_OTHER
                                 yield (t, d, n, st.st_size)
                         if kind == stat.S_IFDIR:
                             visit.append(fp)
 
             if scmutil.istreemanifest(repo):
                 for (t, u, e, s) in repo.store.datafiles():
                     if u.startswith(b'meta/') and (
                         u.endswith(b'.i') or u.endswith(b'.d')
                     ):
                         yield (t, u, e, s)
 
             # Return .d and .i files that do not match the shallow pattern
             match = state.match
             if match and not match.always():
                 for (t, u, e, s) in repo.store.datafiles():
                     f = u[5:-2]  # trim data/...  and .i/.d
                     if not state.match(f):
                         yield (t, u, e, s)
 
             for x in repo.store.topfiles():
-                if state.noflatmf and x[0][:11] == b'00manifest.':
+                if state.noflatmf and x[1][:11] == b'00manifest.':
                     continue
                 yield x
 
         elif shallowutil.isenabled(repo):
             # don't allow cloning from a shallow repo to a full repo
             # since it would require fetching every version of every
             # file in order to create the revlogs.
             raise error.Abort(
                 _(b"Cannot clone from a shallow repo to a full repo.")
             )
         else:
             for x in orig(repo, matcher):
                 yield x
 
     extensions.wrapfunction(streamclone, b'_walkstreamfiles', _walkstreamfiles)
 
     # expose remotefilelog capabilities
     def _capabilities(orig, repo, proto):
         caps = orig(repo, proto)
         if shallowutil.isenabled(repo) or ui.configbool(
             b'remotefilelog', b'server'
         ):
             if isinstance(proto, _sshv1server):
                 # legacy getfiles method which only works over ssh
                 caps.append(constants.NETWORK_CAP_LEGACY_SSH_GETFILES)
             caps.append(b'x_rfl_getflogheads')
             caps.append(b'x_rfl_getfile')
         return caps
 
     extensions.wrapfunction(wireprotov1server, b'_capabilities', _capabilities)
 
     def _adjustlinkrev(orig, self, *args, **kwargs):
         # When generating file blobs, taking the real path is too slow on large
         # repos, so force it to just return the linkrev directly.
         repo = self._repo
         if util.safehasattr(repo, b'forcelinkrev') and repo.forcelinkrev:
             return self._filelog.linkrev(self._filelog.rev(self._filenode))
         return orig(self, *args, **kwargs)
 
     extensions.wrapfunction(
         context.basefilectx, b'_adjustlinkrev', _adjustlinkrev
     )
 
     def _iscmd(orig, cmd):
         if cmd == b'x_rfl_getfiles':
             return False
         return orig(cmd)
 
     extensions.wrapfunction(wireprotoserver, b'iscmd', _iscmd)
 
 
 def _loadfileblob(repo, cachepath, path, node):
     filecachepath = os.path.join(cachepath, path, hex(node))
     if not os.path.exists(filecachepath) or os.path.getsize(filecachepath) == 0:
         filectx = repo.filectx(path, fileid=node)
         if filectx.node() == repo.nullid:
             repo.changelog = changelog.changelog(repo.svfs)
             filectx = repo.filectx(path, fileid=node)
 
         text = createfileblob(filectx)
         # TODO configurable compression engines
         text = zlib.compress(text)
 
         # everything should be user & group read/writable
         oldumask = os.umask(0o002)
         try:
             dirname = os.path.dirname(filecachepath)
             if not os.path.exists(dirname):
                 try:
                     os.makedirs(dirname)
                 except OSError as ex:
                     if ex.errno != errno.EEXIST:
                         raise
 
             f = None
             try:
                 f = util.atomictempfile(filecachepath, b"wb")
                 f.write(text)
             except (IOError, OSError):
                 # Don't abort if the user only has permission to read,
                 # and not write.
                 pass
             finally:
                 if f:
                     f.close()
         finally:
             os.umask(oldumask)
     else:
         with open(filecachepath, b"rb") as f:
             text = f.read()
     return text
 
 
 def getflogheads(repo, proto, path):
     """A server api for requesting a filelog's heads"""
     flog = repo.file(path)
     heads = flog.heads()
     return b'\n'.join((hex(head) for head in heads if head != repo.nullid))
 
 
 def getfile(repo, proto, file, node):
     """A server api for requesting a particular version of a file. Can be used
     in batches to request many files at once. The return protocol is:
     <errorcode>\0<data/errormsg> where <errorcode> is 0 for success or
     non-zero for an error.
 
     data is a compressed blob with revlog flag and ancestors information. See
     createfileblob for its content.
     """
     if shallowutil.isenabled(repo):
         return b'1\0' + _(b'cannot fetch remote files from shallow repo')
     cachepath = repo.ui.config(b"remotefilelog", b"servercachepath")
     if not cachepath:
         cachepath = os.path.join(repo.path, b"remotefilelogcache")
     node = bin(node.strip())
     if node == repo.nullid:
         return b'0\0'
     return b'0\0' + _loadfileblob(repo, cachepath, file, node)
 
 
 def getfiles(repo, proto):
     """A server api for requesting particular versions of particular files."""
     if shallowutil.isenabled(repo):
         raise error.Abort(_(b'cannot fetch remote files from shallow repo'))
     if not isinstance(proto, _sshv1server):
         raise error.Abort(_(b'cannot fetch remote files over non-ssh protocol'))
 
     def streamer():
         fin = proto._fin
 
         cachepath = repo.ui.config(b"remotefilelog", b"servercachepath")
         if not cachepath:
             cachepath = os.path.join(repo.path, b"remotefilelogcache")
 
         while True:
             request = fin.readline()[:-1]
             if not request:
                 break
 
             node = bin(request[:40])
             if node == repo.nullid:
                 yield b'0\n'
                 continue
 
             path = request[40:]
 
             text = _loadfileblob(repo, cachepath, path, node)
 
             yield b'%d\n%s' % (len(text), text)
 
             # it would be better to only flush after processing a whole batch
             # but currently we don't know if there are more requests coming
             proto._fout.flush()
 
     return wireprototypes.streamres(streamer())
 
 
 def createfileblob(filectx):
     """
     format:
         v0:
             str(len(rawtext)) + '\0' + rawtext + ancestortext
         v1:
             'v1' + '\n' + metalist + '\0' + rawtext + ancestortext
             metalist := metalist + '\n' + meta | meta
             meta := sizemeta | flagmeta
             sizemeta := METAKEYSIZE + str(len(rawtext))
             flagmeta := METAKEYFLAG + str(flag)
 
             note: sizemeta must exist. METAKEYFLAG and METAKEYSIZE must have a
             length of 1.
     """
     flog = filectx.filelog()
     frev = filectx.filerev()
     revlogflags = flog._revlog.flags(frev)
     if revlogflags == 0:
         # normal files
         text = filectx.data()
     else:
         # lfs, read raw revision data
         text = flog.rawdata(frev)
 
     repo = filectx._repo
 
     ancestors = [filectx]
 
     try:
         repo.forcelinkrev = True
         ancestors.extend([f for f in filectx.ancestors()])
 
         ancestortext = b""
         for ancestorctx in ancestors:
             parents = ancestorctx.parents()
             p1 = repo.nullid
             p2 = repo.nullid
             if len(parents) > 0:
                 p1 = parents[0].filenode()
             if len(parents) > 1:
                 p2 = parents[1].filenode()
 
             copyname = b""
             rename = ancestorctx.renamed()
             if rename:
                 copyname = rename[0]
             linknode = ancestorctx.node()
             ancestortext += b"%s%s%s%s%s\0" % (
                 ancestorctx.filenode(),
                 p1,
                 p2,
                 linknode,
                 copyname,
             )
     finally:
         repo.forcelinkrev = False
 
     header = shallowutil.buildfileblobheader(len(text), revlogflags)
 
     return b"%s\0%s%s" % (header, text, ancestortext)
 
 
 def gcserver(ui, repo):
     if not repo.ui.configbool(b"remotefilelog", b"server"):
         return
 
     neededfiles = set()
     heads = repo.revs(b"heads(tip~25000:) - null")
 
     cachepath = repo.vfs.join(b"remotefilelogcache")
     for head in heads:
         mf = repo[head].manifest()
         for filename, filenode in pycompat.iteritems(mf):
             filecachepath = os.path.join(cachepath, filename, hex(filenode))
             neededfiles.add(filecachepath)
 
     # delete unneeded older files
     days = repo.ui.configint(b"remotefilelog", b"serverexpiration")
     expiration = time.time() - (days * 24 * 60 * 60)
 
     progress = ui.makeprogress(_(b"removing old server cache"), unit=b"files")
     progress.update(0)
     for root, dirs, files in os.walk(cachepath):
         for file in files:
             filepath = os.path.join(root, file)
             progress.increment()
             if filepath in neededfiles:
                 continue
 
             stat = os.stat(filepath)
             if stat.st_mtime < expiration:
                 os.remove(filepath)
 
     progress.complete()