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__main__.py
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__main__.py
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# Copyright (C) 2013-2020 ycmd contributors
#
# This file is part of ycmd.
#
# ycmd is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# ycmd is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with ycmd. If not, see <http://www.gnu.org/licenses/>.
import sys
import os
if 'YCMD_DEBUGPY_PORT' in os.environ:
try:
import debugpy
debugpy.listen( ( '127.0.0.1', int( os.environ[ 'YCMD_DEBUGPY_PORT' ] ) ) )
debugpy.wait_for_client()
except ImportError:
pass
PY_VERSION = sys.version_info[ 0 : 3 ]
if PY_VERSION < ( 3, 8, 0 ):
sys.exit( 8 )
ROOT_DIR = os.path.abspath( os.path.join( os.path.dirname( __file__ ), '..' ) )
DIR_OF_THIRD_PARTY = os.path.join( ROOT_DIR, 'third_party' )
DIR_OF_WATCHDOG_DEPS = os.path.join( DIR_OF_THIRD_PARTY, 'watchdog_deps' )
DIR_OF_REQUESTS_DEPS = os.path.join( DIR_OF_THIRD_PARTY, 'requests_deps' )
sys.path[ 0:0 ] = [
os.path.join( ROOT_DIR ),
os.path.join( DIR_OF_THIRD_PARTY, 'bottle' ),
os.path.join( DIR_OF_THIRD_PARTY, 'regex-build' ),
os.path.join( DIR_OF_THIRD_PARTY, 'frozendict' ),
os.path.join( DIR_OF_THIRD_PARTY, 'jedi_deps', 'jedi' ),
os.path.join( DIR_OF_THIRD_PARTY, 'jedi_deps', 'parso' ),
os.path.join( DIR_OF_REQUESTS_DEPS, 'requests' ),
os.path.join( DIR_OF_REQUESTS_DEPS, 'chardet' ),
os.path.join( DIR_OF_REQUESTS_DEPS, 'certifi' ),
os.path.join( DIR_OF_REQUESTS_DEPS, 'idna' ),
os.path.join( DIR_OF_REQUESTS_DEPS, 'urllib3', 'src' ),
os.path.join( DIR_OF_WATCHDOG_DEPS, 'watchdog', 'build', 'lib3' ),
os.path.join( DIR_OF_WATCHDOG_DEPS, 'pathtools' ),
os.path.join( DIR_OF_THIRD_PARTY, 'waitress' ) ]
sys.path.append( os.path.join( DIR_OF_THIRD_PARTY, 'jedi_deps', 'numpydoc' ) )
import atexit
import logging
import json
import argparse
import signal
import base64
from ycmd import extra_conf_store, user_options_store, utils
from ycmd.hmac_plugin import HmacPlugin
from ycmd.utils import ( ImportAndCheckCore,
OpenForStdHandle,
ReadFile,
ToBytes )
from ycmd.wsgi_server import StoppableWSGIServer
def YcmCoreSanityCheck():
if 'ycm_core' in sys.modules:
raise RuntimeError( 'ycm_core already imported, ycmd has a bug!' )
# We manually call sys.exit() on SIGTERM and SIGINT so that atexit handlers are
# properly executed.
def SetUpSignalHandler():
def SignalHandler( signum, frame ):
sys.exit()
for sig in [ signal.SIGTERM,
signal.SIGINT ]:
signal.signal( sig, SignalHandler )
def CleanUpLogfiles( stdout, stderr, keep_logfiles ):
# We reset stderr & stdout, just in case something tries to use them
if stderr:
tmp = sys.stderr
sys.stderr = sys.__stderr__
tmp.close()
if stdout:
tmp = sys.stdout
sys.stdout = sys.__stdout__
tmp.close()
if not keep_logfiles:
if stderr:
utils.RemoveIfExists( stderr )
if stdout:
utils.RemoveIfExists( stdout )
def PossiblyDetachFromTerminal():
# If not on windows, detach from controlling terminal to prevent
# SIGINT from killing us.
if not utils.OnWindows():
try:
os.setsid()
# setsid() can fail if the user started ycmd directly from a shell.
except OSError:
pass
def ParseArguments():
parser = argparse.ArgumentParser()
# Not using 'localhost' on purpose; see #987 and #1130
parser.add_argument( '--host', type = str, default = '127.0.0.1',
help = 'server hostname' )
# Default of 0 will make the OS pick a free port for us
parser.add_argument( '--port', type = int, default = 0,
help = 'server port' )
parser.add_argument( '--log', type = str, default = 'info',
help = 'log level, one of '
'[debug|info|warning|error|critical]' )
parser.add_argument( '--idle_suicide_seconds', type = int, default = 0,
help = 'num idle seconds before server shuts down' )
parser.add_argument( '--check_interval_seconds', type = int, default = 600,
help = 'interval in seconds to check server '
'inactivity and keep subservers alive' )
parser.add_argument( '--options_file', type = str, required = True,
help = 'file with user options, in JSON format' )
parser.add_argument( '--stdout', type = str, default = None,
help = 'optional file to use for stdout' )
parser.add_argument( '--stderr', type = str, default = None,
help = 'optional file to use for stderr' )
parser.add_argument( '--keep_logfiles', action = 'store_true', default = None,
help = 'retain logfiles after the server exits' )
return parser.parse_args()
def SetupLogging( log_level ):
numeric_level = getattr( logging, log_level.upper(), None )
if not isinstance( numeric_level, int ):
raise ValueError( 'Invalid log level: %s' % log_level )
# Has to be called before any call to logging.getLogger()
logging.basicConfig( format = '%(asctime)s - %(levelname)s - %(message)s',
level = numeric_level )
def SetupOptions( options_file ):
options = user_options_store.DefaultOptions()
user_options = json.loads( ReadFile( options_file ) )
options.update( user_options )
utils.RemoveIfExists( options_file )
hmac_secret = ToBytes( base64.b64decode( options[ 'hmac_secret' ] ) )
del options[ 'hmac_secret' ]
user_options_store.SetAll( options )
return options, hmac_secret
def CloseStdin():
if sys.stdin is not None:
sys.stdin.close()
os.close( 0 )
def Main():
args = ParseArguments()
if args.stdout is not None:
sys.stdout = OpenForStdHandle( args.stdout )
if args.stderr is not None:
sys.stderr = OpenForStdHandle( args.stderr )
SetupLogging( args.log )
options, hmac_secret = SetupOptions( args.options_file )
# This ensures that ycm_core is not loaded before extra conf
# preload was run.
YcmCoreSanityCheck()
extra_conf_store.CallGlobalExtraConfYcmCorePreloadIfExists()
code = ImportAndCheckCore()
if code:
sys.exit( code )
PossiblyDetachFromTerminal()
# These can't be top-level imports because they transitively import
# ycm_core which we want to be imported ONLY after extra conf
# preload has executed.
from ycmd import handlers
from ycmd.watchdog_plugin import WatchdogPlugin
handlers.UpdateUserOptions( options )
handlers.SetHmacSecret( hmac_secret )
handlers.KeepSubserversAlive( args.check_interval_seconds )
SetUpSignalHandler()
# Functions registered by the atexit module are called at program termination
# in last in, first out order.
atexit.register( CleanUpLogfiles, args.stdout,
args.stderr,
args.keep_logfiles )
atexit.register( handlers.ServerCleanup )
handlers.app.uninstall( True )
handlers.app.install( WatchdogPlugin( args.idle_suicide_seconds,
args.check_interval_seconds ) )
handlers.app.install( HmacPlugin( hmac_secret ) )
CloseStdin()
handlers.wsgi_server = StoppableWSGIServer( handlers.app,
host = args.host,
port = args.port )
if sys.stdin is not None:
print( f'serving on http://{ handlers.wsgi_server.server_name }:'
f'{ handlers.wsgi_server.server_port }' )
handlers.wsgi_server.serve_forever()
handlers.wsgi_server.server_close()
handlers.ServerCleanup()
if __name__ == "__main__":
Main()