Bug 1522140 - Make .ycm_extra_conf.py handle headers better. r=Ehsan
Files with .h extension are built with the c compiler by default, which makes
the diagnostics useless. If we know this is a cpp file, hint it so that it
builds it with the right mode.
Differential Revision:
https://phabricator.services.mozilla.com/D17372
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import imp
import os
import shlex
import sys
try:
from StringIO import StringIO
except ImportError:
from io import StringIO
old_bytecode = sys.dont_write_bytecode
sys.dont_write_bytecode = True
path = os.path.join(os.path.dirname(__file__), 'mach')
if not os.path.exists(path):
path = os.path.join(os.path.dirname(__file__), 'config.status')
config = imp.load_module('_buildconfig', open(path), path, ('', 'r', imp.PY_SOURCE))
path = os.path.join(config.topsrcdir, 'mach')
mach_module = imp.load_module('_mach', open(path), path, ('', 'r', imp.PY_SOURCE))
sys.dont_write_bytecode = old_bytecode
def _is_likely_cpp_header(filename):
if not filename.endswith('.h'):
return False
if filename.endswith('Inlines.h') or filename.endswith('-inl.h'):
return True
cpp_file = filename[:-1] + 'cpp'
return os.path.exists(cpp_file)
def FlagsForFile(filename):
mach = mach_module.get_mach()
out = StringIO()
# Mach calls sys.stdout.fileno(), so we need to fake it when capturing it.
# Returning an invalid file descriptor does the trick.
out.fileno = lambda: -1
out.encoding = None
mach.run(['compileflags', filename], stdout=out, stderr=out)
flag_list = shlex.split(out.getvalue())
# This flag is added by Fennec for android build and causes ycmd to fail to parse the file.
# Removing this flag is a workaround until ycmd starts to handle this flag properly.
# https://github.com/Valloric/YouCompleteMe/issues/1490
final_flags = [x for x in flag_list if not x.startswith('-march=armv')]
if _is_likely_cpp_header(filename):
final_flags += ["-x", "c++"]
return {
'flags': final_flags,
'do_cache': True
}