|
|
# 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, nullid
|
|
|
from mercurial import (
|
|
|
changegroup,
|
|
|
changelog,
|
|
|
context,
|
|
|
error,
|
|
|
extensions,
|
|
|
match,
|
|
|
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("includepattern="):
|
|
|
includepattern = cap[len("includepattern="):].split('\0')
|
|
|
elif cap.startswith("excludepattern="):
|
|
|
excludepattern = cap[len("excludepattern="):].split('\0')
|
|
|
|
|
|
m = match.always()
|
|
|
if includepattern or excludepattern:
|
|
|
m = match.match(repo.root, '', 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, '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(
|
|
|
'x_rfl_getflogheads', 'path', permission='pull')(getflogheads)
|
|
|
wireprotov1server.wireprotocommand(
|
|
|
'x_rfl_getfiles', '', permission='pull')(getfiles)
|
|
|
wireprotov1server.wireprotocommand(
|
|
|
'x_rfl_getfile', 'file node', permission='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('includepattern')
|
|
|
if raw:
|
|
|
includepattern = raw.split('\0')
|
|
|
raw = other.get('excludepattern')
|
|
|
if raw:
|
|
|
excludepattern = raw.split('\0')
|
|
|
|
|
|
oldshallow = state.shallowremote
|
|
|
oldmatch = state.match
|
|
|
oldnoflatmf = state.noflatmf
|
|
|
try:
|
|
|
state.shallowremote = True
|
|
|
state.match = match.always()
|
|
|
state.noflatmf = other.get('noflatmanifest') == 'True'
|
|
|
if includepattern or excludepattern:
|
|
|
state.match = match.match(repo.root, '', 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['stream_out_shallow'] = (stream_out_shallow, '*')
|
|
|
|
|
|
# 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, 'data')]
|
|
|
while visit:
|
|
|
p = visit.pop()
|
|
|
for f, kind, st in readdir(p, stat=True):
|
|
|
fp = p + '/' + f
|
|
|
if kind == stat.S_IFREG:
|
|
|
if not fp.endswith('.i') and not fp.endswith('.d'):
|
|
|
n = util.pconvert(fp[striplen:])
|
|
|
yield (store.decodedir(n), n, st.st_size)
|
|
|
if kind == stat.S_IFDIR:
|
|
|
visit.append(fp)
|
|
|
|
|
|
if 'treemanifest' in repo.requirements:
|
|
|
for (u, e, s) in repo.store.datafiles():
|
|
|
if (u.startswith('meta/') and
|
|
|
(u.endswith('.i') or u.endswith('.d'))):
|
|
|
yield (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 (u, e, s) in repo.store.datafiles():
|
|
|
f = u[5:-2] # trim data/... and .i/.d
|
|
|
if not state.match(f):
|
|
|
yield (u, e, s)
|
|
|
|
|
|
for x in repo.store.topfiles():
|
|
|
if state.noflatmf and x[0][:11] == '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(_("Cannot clone from a shallow repo "
|
|
|
"to a full repo."))
|
|
|
else:
|
|
|
for x in orig(repo, matcher):
|
|
|
yield x
|
|
|
|
|
|
extensions.wrapfunction(streamclone, '_walkstreamfiles', _walkstreamfiles)
|
|
|
|
|
|
# expose remotefilelog capabilities
|
|
|
def _capabilities(orig, repo, proto):
|
|
|
caps = orig(repo, proto)
|
|
|
if (shallowutil.isenabled(repo) or ui.configbool('remotefilelog',
|
|
|
'server')):
|
|
|
if isinstance(proto, _sshv1server):
|
|
|
# legacy getfiles method which only works over ssh
|
|
|
caps.append(constants.NETWORK_CAP_LEGACY_SSH_GETFILES)
|
|
|
caps.append('x_rfl_getflogheads')
|
|
|
caps.append('x_rfl_getfile')
|
|
|
return caps
|
|
|
extensions.wrapfunction(wireprotov1server, '_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, 'forcelinkrev') and repo.forcelinkrev:
|
|
|
return self._filelog.linkrev(self._filelog.rev(self._filenode))
|
|
|
return orig(self, *args, **kwargs)
|
|
|
|
|
|
extensions.wrapfunction(
|
|
|
context.basefilectx, '_adjustlinkrev', _adjustlinkrev)
|
|
|
|
|
|
def _iscmd(orig, cmd):
|
|
|
if cmd == 'x_rfl_getfiles':
|
|
|
return False
|
|
|
return orig(cmd)
|
|
|
|
|
|
extensions.wrapfunction(wireprotoserver, '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() == 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, "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, "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 '\n'.join((hex(head) for head in heads if head != 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 '1\0' + _('cannot fetch remote files from shallow repo')
|
|
|
cachepath = repo.ui.config("remotefilelog", "servercachepath")
|
|
|
if not cachepath:
|
|
|
cachepath = os.path.join(repo.path, "remotefilelogcache")
|
|
|
node = bin(node.strip())
|
|
|
if node == nullid:
|
|
|
return '0\0'
|
|
|
return '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(_('cannot fetch remote files from shallow repo'))
|
|
|
if not isinstance(proto, _sshv1server):
|
|
|
raise error.Abort(_('cannot fetch remote files over non-ssh protocol'))
|
|
|
|
|
|
def streamer():
|
|
|
fin = proto._fin
|
|
|
|
|
|
cachepath = repo.ui.config("remotefilelog", "servercachepath")
|
|
|
if not cachepath:
|
|
|
cachepath = os.path.join(repo.path, "remotefilelogcache")
|
|
|
|
|
|
while True:
|
|
|
request = fin.readline()[:-1]
|
|
|
if not request:
|
|
|
break
|
|
|
|
|
|
node = bin(request[:40])
|
|
|
if node == nullid:
|
|
|
yield '0\n'
|
|
|
continue
|
|
|
|
|
|
path = request[40:]
|
|
|
|
|
|
text = _loadfileblob(repo, cachepath, path, node)
|
|
|
|
|
|
yield '%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 = ""
|
|
|
for ancestorctx in ancestors:
|
|
|
parents = ancestorctx.parents()
|
|
|
p1 = nullid
|
|
|
p2 = nullid
|
|
|
if len(parents) > 0:
|
|
|
p1 = parents[0].filenode()
|
|
|
if len(parents) > 1:
|
|
|
p2 = parents[1].filenode()
|
|
|
|
|
|
copyname = ""
|
|
|
rename = ancestorctx.renamed()
|
|
|
if rename:
|
|
|
copyname = rename[0]
|
|
|
linknode = ancestorctx.node()
|
|
|
ancestortext += "%s%s%s%s%s\0" % (
|
|
|
ancestorctx.filenode(), p1, p2, linknode,
|
|
|
copyname)
|
|
|
finally:
|
|
|
repo.forcelinkrev = False
|
|
|
|
|
|
header = shallowutil.buildfileblobheader(len(text), revlogflags)
|
|
|
|
|
|
return "%s\0%s%s" % (header, text, ancestortext)
|
|
|
|
|
|
def gcserver(ui, repo):
|
|
|
if not repo.ui.configbool("remotefilelog", "server"):
|
|
|
return
|
|
|
|
|
|
neededfiles = set()
|
|
|
heads = repo.revs("heads(tip~25000:) - null")
|
|
|
|
|
|
cachepath = repo.vfs.join("remotefilelogcache")
|
|
|
for head in heads:
|
|
|
mf = repo[head].manifest()
|
|
|
for filename, filenode in mf.iteritems():
|
|
|
filecachepath = os.path.join(cachepath, filename, hex(filenode))
|
|
|
neededfiles.add(filecachepath)
|
|
|
|
|
|
# delete unneeded older files
|
|
|
days = repo.ui.configint("remotefilelog", "serverexpiration")
|
|
|
expiration = time.time() - (days * 24 * 60 * 60)
|
|
|
|
|
|
progress = ui.makeprogress(_("removing old server cache"), unit="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()
|
|
|
|
