145 lines
4.2 KiB
Python
145 lines
4.2 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (C) 2011, 2012 Strahinja Val Markovic <val@markovic.io>
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#
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# This file is part of YouCompleteMe.
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#
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# YouCompleteMe is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# YouCompleteMe is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with YouCompleteMe. If not, see <http://www.gnu.org/licenses/>.
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import imp
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import os
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import ycm_core
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import random
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import string
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import sys
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import vimsupport
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YCM_EXTRA_CONF_FILENAME = '.ycm_extra_conf.py'
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NO_OPTIONS_FILENAME_MESSAGE = ('No {0} file detected, so no compile flags '
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'are available. Thus no semantic support for C/C++/ObjC/ObjC++.').format(
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YCM_EXTRA_CONF_FILENAME )
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class Flags( object ):
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def __init__( self ):
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# It's caches all the way down...
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self.flags_for_file = {}
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self.flags_module_for_file = {}
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self.flags_module_for_flags_module_file = {}
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self.special_clang_flags = _SpecialClangIncludes()
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def FlagsForFile( self, filename ):
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try:
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return self.flags_for_file[ filename ]
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except KeyError:
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flags_module = self._FlagsModuleForFile( filename )
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if not flags_module:
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vimsupport.PostVimMessage( NO_OPTIONS_FILENAME_MESSAGE )
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return None
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results = flags_module.FlagsForFile( filename )
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if not results.get( 'flags_ready', True ):
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return None
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results[ 'flags' ] += self.special_clang_flags
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sanitized_flags = _SanitizeFlags( results[ 'flags' ] )
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if results[ 'do_cache' ]:
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self.flags_for_file[ filename ] = sanitized_flags
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return sanitized_flags
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def _FlagsModuleForFile( self, filename ):
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try:
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return self.flags_module_for_file[ filename ]
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except KeyError:
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flags_module_file = _FlagsModuleSourceFileForFile( filename )
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if not flags_module_file:
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return None
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try:
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flags_module = self.flags_module_for_flags_module_file[
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flags_module_file ]
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except KeyError:
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sys.path.append( _DirectoryOfThisScript() )
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flags_module = imp.load_source( _RandomName(), flags_module_file )
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del sys.path[ -1 ]
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self.flags_module_for_flags_module_file[
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flags_module_file ] = flags_module
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self.flags_module_for_file[ filename ] = flags_module
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return flags_module
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def _FlagsModuleSourceFileForFile( filename ):
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"""For a given filename, finds its nearest YCM_EXTRA_CONF_FILENAME file that
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will compute the flags necessary to compile the file. Returns None if no
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YCM_EXTRA_CONF_FILENAME file could be found."""
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parent_folder = os.path.dirname( filename )
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old_parent_folder = ''
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while True:
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current_file = os.path.join( parent_folder, YCM_EXTRA_CONF_FILENAME )
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if os.path.exists( current_file ):
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return current_file
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old_parent_folder = parent_folder
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parent_folder = os.path.dirname( parent_folder )
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if parent_folder == old_parent_folder:
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return None
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def _RandomName():
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"""Generates a random module name."""
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return ''.join( random.choice( string.ascii_lowercase ) for x in range( 15 ) )
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def _SanitizeFlags( flags ):
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"""Drops unsafe flags. Currently these are only -arch flags; they tend to
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crash libclang."""
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sanitized_flags = []
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saw_arch = False
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for i, flag in enumerate( flags ):
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if flag == '-arch':
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saw_arch = True
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continue
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elif flag.startswith( '-arch' ):
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continue
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elif saw_arch:
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saw_arch = False
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continue
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sanitized_flags.append( flag )
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vector = ycm_core.StringVec()
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for flag in sanitized_flags:
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vector.append( flag )
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return vector
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def _SpecialClangIncludes():
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libclang_dir = os.path.dirname( ycm_core.__file__ )
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path_to_includes = os.path.join( libclang_dir, 'clang_includes' )
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return [ '-I', path_to_includes ]
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def _DirectoryOfThisScript():
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return os.path.dirname( os.path.abspath( __file__ ) )
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