view tests/dumbhttp.py @ 44261:04a3ae7aba14

chg: force-set LC_CTYPE on server start to actual value from the environment

Python 3.7+ will "coerce" the LC_CTYPE variable in many instances, and this can
cause issues with chg being able to start up. D7550 attempted to fix this, but a
combination of a misreading of the way that python3.7 does the coercion and an
untested state (LC_CTYPE being set to an invalid value) meant that this was
still not quite working.

This change will cause differences between chg and hg: hg will have the LC_CTYPE
environment variable coerced, while chg will not. This is unlikely to cause any
detectable behavior differences in what Mercurial itself outputs, but it does
have two known effects:

-   When using hg, the coerced LC_CTYPE will be passed to subprocesses, even
    non-python ones. Using chg will remove the coercion, and this will not
    happen. This is arguably more correct behavior on chg's part.
-   On macOS, if you set your region to Brazil but your language to English,
    this isn't representable in locale strings, so macOS sets LC_CTYPE=UTF-8. If
    this value is passed along when ssh'ing to a non-macOS machine, some
    functions (such as locale.setlocale()) may raise an exception due to an
    unsupported locale setting. This is most easily encountered when doing an
    interactive commit/split/etc. when using ui.interface=curses.

Differential Revision: https://phab.mercurial-scm.org/D8039

#!/usr/bin/env python

from __future__ import absolute_import

"""
Small and dumb HTTP server for use in tests.
"""

import optparse
import os
import signal
import socket
import sys

from mercurial import (
    encoding,
    pycompat,
    server,
    util,
)

httpserver = util.httpserver
OptionParser = optparse.OptionParser

if os.environ.get('HGIPV6', '0') == '1':

    class simplehttpserver(httpserver.httpserver):
        address_family = socket.AF_INET6


else:
    simplehttpserver = httpserver.httpserver


class _httprequesthandler(httpserver.simplehttprequesthandler):
    def log_message(self, format, *args):
        httpserver.simplehttprequesthandler.log_message(self, format, *args)
        sys.stderr.flush()


class simplehttpservice(object):
    def __init__(self, host, port):
        self.address = (host, port)

    def init(self):
        self.httpd = simplehttpserver(self.address, _httprequesthandler)

    def run(self):
        self.httpd.serve_forever()


if __name__ == '__main__':
    parser = OptionParser()
    parser.add_option(
        '-p',
        '--port',
        dest='port',
        type='int',
        default=8000,
        help='TCP port to listen on',
        metavar='PORT',
    )
    parser.add_option(
        '-H',
        '--host',
        dest='host',
        default='localhost',
        help='hostname or IP to listen on',
        metavar='HOST',
    )
    parser.add_option('--logfile', help='file name of access/error log')
    parser.add_option(
        '--pid',
        dest='pid',
        help='file name where the PID of the server is stored',
    )
    parser.add_option(
        '-f',
        '--foreground',
        dest='foreground',
        action='store_true',
        help='do not start the HTTP server in the background',
    )
    parser.add_option('--daemon-postexec', action='append')

    (options, args) = parser.parse_args()

    signal.signal(signal.SIGTERM, lambda x, y: sys.exit(0))

    if options.foreground and options.logfile:
        parser.error(
            "options --logfile and --foreground are mutually " "exclusive"
        )
    if options.foreground and options.pid:
        parser.error("options --pid and --foreground are mutually exclusive")

    opts = {
        b'pid_file': options.pid,
        b'daemon': not options.foreground,
        b'daemon_postexec': pycompat.rapply(
            encoding.strtolocal, options.daemon_postexec
        ),
    }
    service = simplehttpservice(options.host, options.port)
    runargs = [sys.executable, __file__] + sys.argv[1:]
    runargs = [pycompat.fsencode(a) for a in runargs]
    server.runservice(
        opts,
        initfn=service.init,
        runfn=service.run,
        logfile=options.logfile,
        runargs=runargs,
    )