wireproto: support for pullbundles
Pullbundles are similar to clonebundles, but served as normal inline
bundle streams. They are almost transparent to the client -- the only
visible effect is that the client might get less changes than what it
asked for, i.e. not all requested head revisions are provided.
The client announces support for the necessary retries with the
partial-pull capability. After receiving a partial bundle, it updates
the set of revisions shared with the server and drops all now-known
heads from the request list. It will then rerun getbundle until
no changes are received or all remote heads are present.
Extend badserverext to support per-socket limit, i.e. don't assume that
the same limits should be applied to all sockets.
Differential Revision: https://phab.mercurial-scm.org/D1856
from __future__ import absolute_import, print_function
import os
import stat
import subprocess
import sys
if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'],
'cacheable']):
sys.exit(80)
from mercurial import (
extensions,
hg,
localrepo,
pycompat,
ui as uimod,
util,
vfs as vfsmod,
)
if pycompat.ispy3:
xrange = range
class fakerepo(object):
def __init__(self):
self._filecache = {}
class fakevfs(object):
def join(self, p):
return p
vfs = fakevfs()
def unfiltered(self):
return self
def sjoin(self, p):
return p
@localrepo.repofilecache('x', 'y')
def cached(self):
print('creating')
return 'string from function'
def invalidate(self):
for k in self._filecache:
try:
delattr(self, k)
except AttributeError:
pass
def basic(repo):
print("* neither file exists")
# calls function
repo.cached
repo.invalidate()
print("* neither file still exists")
# uses cache
repo.cached
# create empty file
f = open('x', 'w')
f.close()
repo.invalidate()
print("* empty file x created")
# should recreate the object
repo.cached
f = open('x', 'w')
f.write('a')
f.close()
repo.invalidate()
print("* file x changed size")
# should recreate the object
repo.cached
repo.invalidate()
print("* nothing changed with either file")
# stats file again, reuses object
repo.cached
# atomic replace file, size doesn't change
# hopefully st_mtime doesn't change as well so this doesn't use the cache
# because of inode change
f = vfsmod.vfs('.')('x', 'w', atomictemp=True)
f.write('b')
f.close()
repo.invalidate()
print("* file x changed inode")
repo.cached
# create empty file y
f = open('y', 'w')
f.close()
repo.invalidate()
print("* empty file y created")
# should recreate the object
repo.cached
f = open('y', 'w')
f.write('A')
f.close()
repo.invalidate()
print("* file y changed size")
# should recreate the object
repo.cached
f = vfsmod.vfs('.')('y', 'w', atomictemp=True)
f.write('B')
f.close()
repo.invalidate()
print("* file y changed inode")
repo.cached
f = vfsmod.vfs('.')('x', 'w', atomictemp=True)
f.write('c')
f.close()
f = vfsmod.vfs('.')('y', 'w', atomictemp=True)
f.write('C')
f.close()
repo.invalidate()
print("* both files changed inode")
repo.cached
def fakeuncacheable():
def wrapcacheable(orig, *args, **kwargs):
return False
def wrapinit(orig, *args, **kwargs):
pass
originit = extensions.wrapfunction(util.cachestat, '__init__', wrapinit)
origcacheable = extensions.wrapfunction(util.cachestat, 'cacheable',
wrapcacheable)
for fn in ['x', 'y']:
try:
os.remove(fn)
except OSError:
pass
basic(fakerepo())
util.cachestat.cacheable = origcacheable
util.cachestat.__init__ = originit
def test_filecache_synced():
# test old behavior that caused filecached properties to go out of sync
os.system('hg init && echo a >> a && hg ci -qAm.')
repo = hg.repository(uimod.ui.load())
# first rollback clears the filecache, but changelog to stays in __dict__
repo.rollback()
repo.commit('.')
# second rollback comes along and touches the changelog externally
# (file is moved)
repo.rollback()
# but since changelog isn't under the filecache control anymore, we don't
# see that it changed, and return the old changelog without reconstructing
# it
repo.commit('.')
def setbeforeget(repo):
os.remove('x')
os.remove('y')
repo.cached = 'string set externally'
repo.invalidate()
print("* neither file exists")
print(repo.cached)
repo.invalidate()
f = open('x', 'w')
f.write('a')
f.close()
print("* file x created")
print(repo.cached)
repo.cached = 'string 2 set externally'
repo.invalidate()
print("* string set externally again")
print(repo.cached)
repo.invalidate()
f = open('y', 'w')
f.write('b')
f.close()
print("* file y created")
print(repo.cached)
def antiambiguity():
filename = 'ambigcheck'
# try some times, because reproduction of ambiguity depends on
# "filesystem time"
for i in xrange(5):
fp = open(filename, 'w')
fp.write('FOO')
fp.close()
oldstat = os.stat(filename)
if oldstat[stat.ST_CTIME] != oldstat[stat.ST_MTIME]:
# subsequent changing never causes ambiguity
continue
repetition = 3
# repeat changing via checkambigatclosing, to examine whether
# st_mtime is advanced multiple times as expected
for i in xrange(repetition):
# explicit closing
fp = vfsmod.checkambigatclosing(open(filename, 'a'))
fp.write('FOO')
fp.close()
# implicit closing by "with" statement
with vfsmod.checkambigatclosing(open(filename, 'a')) as fp:
fp.write('BAR')
newstat = os.stat(filename)
if oldstat[stat.ST_CTIME] != newstat[stat.ST_CTIME]:
# timestamp ambiguity was naturally avoided while repetition
continue
# st_mtime should be advanced "repetition * 2" times, because
# all changes occurred at same time (in sec)
expected = (oldstat[stat.ST_MTIME] + repetition * 2) & 0x7fffffff
if newstat[stat.ST_MTIME] != expected:
print("'newstat[stat.ST_MTIME] %s is not %s (as %s + %s * 2)" %
(newstat[stat.ST_MTIME], expected,
oldstat[stat.ST_MTIME], repetition))
# no more examination is needed regardless of result
break
else:
# This platform seems too slow to examine anti-ambiguity
# of file timestamp (or test happened to be executed at
# bad timing). Exit silently in this case, because running
# on other faster platforms can detect problems
pass
print('basic:')
print()
basic(fakerepo())
print()
print('fakeuncacheable:')
print()
fakeuncacheable()
test_filecache_synced()
print()
print('setbeforeget:')
print()
setbeforeget(fakerepo())
print()
print('antiambiguity:')
print()
antiambiguity()