bundlerepo: dynamically create repository type from base repository
Previously, bundlerepository inherited from localrepo.localrepository.
You simply instantiated a bundlerepository and its __init__ called
localrepo.localrepository.__init__. Things were simple.
Unfortunately, this strategy is limiting because it assumes that
the base repository is a localrepository instance. And it assumes
various properties of localrepository, such as the arguments its
__init__ takes. And it prevents us from changing behavior of
localrepository.__init__ without also having to change derived classes.
Previous and ongoing work to abstract storage revealed these
limitations.
This commit changes the initialization strategy of bundle repositories
to dynamically create a type to represent the repository. Instead of
a static type, we instantiate a new local repo instance via
localrepo.instance(). We then combine its __class__ with
bundlerepository to produce a new type. This ensures that no matter
how localrepo.instance() decides to create a repository object, we
can derive a bundle repo object from it. i.e. localrepo.instance()
could return a type that isn't a localrepository and it would "just
work."
Well, it would "just work" if bundlerepository's custom implementations
only accessed attributes in the documented repository interface. I'm
pretty sure it violates the interface contract in a handful of
places. But we can worry about that another day. This change gets us
closer to doing more clever things around instantiating repository
instances without having to worry about teaching bundlerepository about
them.
.. api::
``bundlerepo.bundlerepository`` is no longer usable on its own.
The class is combined with the class of the base repository it is
associated with at run-time.
New bundlerepository instances can be obtained by calling
``bundlerepo.instance()`` or ``bundlerepo.makebundlerepository()``.
Differential Revision: https://phab.mercurial-scm.org/D4555
#!/usr/bin/env python
# fsmonitor-run-tests.py - Run Mercurial tests with fsmonitor enabled
#
# Copyright 2017 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.
#
# This is a wrapper around run-tests.py that spins up an isolated instance of
# Watchman and runs the Mercurial tests against it. This ensures that the global
# version of Watchman isn't affected by anything this test does.
from __future__ import absolute_import
from __future__ import print_function
import argparse
import contextlib
import json
import os
import shutil
import subprocess
import sys
import tempfile
import uuid
osenvironb = getattr(os, 'environb', os.environ)
if sys.version_info > (3, 5, 0):
PYTHON3 = True
xrange = range # we use xrange in one place, and we'd rather not use range
def _bytespath(p):
return p.encode('utf-8')
elif sys.version_info >= (3, 0, 0):
print('%s is only supported on Python 3.5+ and 2.7, not %s' %
(sys.argv[0], '.'.join(str(v) for v in sys.version_info[:3])))
sys.exit(70) # EX_SOFTWARE from `man 3 sysexit`
else:
PYTHON3 = False
# In python 2.x, path operations are generally done using
# bytestrings by default, so we don't have to do any extra
# fiddling there. We define the wrapper functions anyway just to
# help keep code consistent between platforms.
def _bytespath(p):
return p
def getparser():
"""Obtain the argument parser used by the CLI."""
parser = argparse.ArgumentParser(
description='Run tests with fsmonitor enabled.',
epilog='Unrecognized options are passed to run-tests.py.')
# - keep these sorted
# - none of these options should conflict with any in run-tests.py
parser.add_argument('--keep-fsmonitor-tmpdir', action='store_true',
help='keep temporary directory with fsmonitor state')
parser.add_argument('--watchman',
help='location of watchman binary (default: watchman in PATH)',
default='watchman')
return parser
@contextlib.contextmanager
def watchman(args):
basedir = tempfile.mkdtemp(prefix='hg-fsmonitor')
try:
# Much of this configuration is borrowed from Watchman's test harness.
cfgfile = os.path.join(basedir, 'config.json')
# TODO: allow setting a config
with open(cfgfile, 'w') as f:
f.write(json.dumps({}))
logfile = os.path.join(basedir, 'log')
clilogfile = os.path.join(basedir, 'cli-log')
if os.name == 'nt':
sockfile = '\\\\.\\pipe\\watchman-test-%s' % uuid.uuid4().hex
else:
sockfile = os.path.join(basedir, 'sock')
pidfile = os.path.join(basedir, 'pid')
statefile = os.path.join(basedir, 'state')
argv = [
args.watchman,
'--sockname', sockfile,
'--logfile', logfile,
'--pidfile', pidfile,
'--statefile', statefile,
'--foreground',
'--log-level=2', # debug logging for watchman
]
envb = osenvironb.copy()
envb[b'WATCHMAN_CONFIG_FILE'] = _bytespath(cfgfile)
with open(clilogfile, 'wb') as f:
proc = subprocess.Popen(
argv, env=envb, stdin=None, stdout=f, stderr=f)
try:
yield sockfile
finally:
proc.terminate()
proc.kill()
finally:
if args.keep_fsmonitor_tmpdir:
print('fsmonitor dir available at %s' % basedir)
else:
shutil.rmtree(basedir, ignore_errors=True)
def run():
parser = getparser()
args, runtestsargv = parser.parse_known_args()
with watchman(args) as sockfile:
osenvironb[b'WATCHMAN_SOCK'] = _bytespath(sockfile)
# Indicate to hghave that we're running with fsmonitor enabled.
osenvironb[b'HGFSMONITOR_TESTS'] = b'1'
runtestdir = os.path.dirname(__file__)
runtests = os.path.join(runtestdir, 'run-tests.py')
blacklist = os.path.join(runtestdir, 'blacklists', 'fsmonitor')
runtestsargv.insert(0, runtests)
runtestsargv.extend([
'--extra-config',
'extensions.fsmonitor=',
'--blacklist',
blacklist,
])
return subprocess.call(runtestsargv)
if __name__ == '__main__':
sys.exit(run())