annotate tests/fsmonitor-run-tests.py @ 36369:066e6a9d52bb

sshpeer: make pipe polling code more explicit

"hasbuffer" is a property on our special bufferedinputpipe class.
When reading this code, I thought it might have had something
special to do properties on built-in types. But "hasbuffer" doesn't
appear in the CPython code base for either 2.7 or 3.7, so the
answer is no.

Let's make the code more explicit about the fact that it deals with
our special bufferedinputpipe type.

Differential Revision: https://phab.mercurial-scm.org/D2382

#!/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())