113 lines
4.0 KiB
Python
113 lines
4.0 KiB
Python
# Copyright (C) 2015-2017 YouCompleteMe contributors.
|
|
#
|
|
# This file is part of YouCompleteMe.
|
|
#
|
|
# YouCompleteMe 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.
|
|
#
|
|
# YouCompleteMe 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 YouCompleteMe. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
from __future__ import unicode_literals
|
|
from __future__ import print_function
|
|
from __future__ import division
|
|
from __future__ import absolute_import
|
|
# Not installing aliases from python-future; it's unreliable and slow.
|
|
from builtins import * # noqa
|
|
|
|
import os
|
|
import sys
|
|
import vim
|
|
import functools
|
|
import re
|
|
|
|
# Can't import these from setup.py because it makes nosetests go crazy.
|
|
DIR_OF_CURRENT_SCRIPT = os.path.dirname( os.path.abspath( __file__ ) )
|
|
DIR_OF_YCMD = os.path.join( DIR_OF_CURRENT_SCRIPT, '..', '..', 'third_party',
|
|
'ycmd' )
|
|
WIN_PYTHON_PATH = os.path.join( sys.exec_prefix, 'python.exe' )
|
|
PYTHON_BINARY_REGEX = re.compile(
|
|
r'python((2(\.[67])?)|(3(\.[3-9])?))?(.exe)?$', re.IGNORECASE )
|
|
|
|
|
|
def Memoize( obj ):
|
|
cache = obj.cache = {}
|
|
|
|
@functools.wraps( obj )
|
|
def memoizer( *args, **kwargs ):
|
|
key = str( args ) + str( kwargs )
|
|
if key not in cache:
|
|
cache[ key ] = obj( *args, **kwargs )
|
|
return cache[ key ]
|
|
return memoizer
|
|
|
|
|
|
@Memoize
|
|
def PathToPythonInterpreter():
|
|
# Not calling the Python interpreter to check its version as it significantly
|
|
# impacts startup time.
|
|
from ycmd import utils
|
|
|
|
python_interpreter = vim.eval( 'g:ycm_server_python_interpreter' )
|
|
if python_interpreter:
|
|
if _EndsWithPython( python_interpreter ):
|
|
return python_interpreter
|
|
|
|
raise RuntimeError( "Path in 'g:ycm_server_python_interpreter' option "
|
|
"does not point to a valid Python 2.6+ or 3.3+." )
|
|
|
|
python_interpreter = _PathToPythonUsedDuringBuild()
|
|
if _EndsWithPython( python_interpreter ):
|
|
return python_interpreter
|
|
|
|
# On UNIX platforms, we use sys.executable as the Python interpreter path.
|
|
# We cannot use sys.executable on Windows because for unknown reasons, it
|
|
# returns the Vim executable. Instead, we use sys.exec_prefix to deduce the
|
|
# interpreter path.
|
|
python_interpreter = ( WIN_PYTHON_PATH if utils.OnWindows() else
|
|
sys.executable )
|
|
if _EndsWithPython( python_interpreter ):
|
|
return python_interpreter
|
|
|
|
# As a last resort, we search python in the PATH. We prefer Python 2 over 3
|
|
# for the sake of backwards compatibility with ycm_extra_conf.py files out
|
|
# there; few people wrote theirs to work on py3.
|
|
# So we check 'python2' before 'python' because on some distributions (Arch
|
|
# Linux for example), python refers to python3.
|
|
python_interpreter = utils.PathToFirstExistingExecutable( [ 'python2',
|
|
'python',
|
|
'python3' ] )
|
|
if python_interpreter:
|
|
return python_interpreter
|
|
|
|
raise RuntimeError( "Cannot find Python 2.6+ or 3.3+. You can set its path "
|
|
"using the 'g:ycm_server_python_interpreter' "
|
|
"option." )
|
|
|
|
|
|
def _PathToPythonUsedDuringBuild():
|
|
from ycmd import utils
|
|
|
|
try:
|
|
filepath = os.path.join( DIR_OF_YCMD, 'PYTHON_USED_DURING_BUILDING' )
|
|
return utils.ReadFile( filepath ).strip()
|
|
# We need to check for IOError for Python2 and OSError for Python3
|
|
except ( IOError, OSError ):
|
|
return None
|
|
|
|
|
|
def _EndsWithPython( path ):
|
|
"""Check if given path ends with a python 2.6+ or 3.3+ name."""
|
|
return path and PYTHON_BINARY_REGEX.search( path ) is not None
|
|
|
|
|
|
def PathToServerScript():
|
|
return os.path.join( DIR_OF_YCMD, 'ycmd' )
|