Global conf for ycmd that uses existing environnement variables and Makefiles

.ycmd_make_conf.py

import os
import re

FlagsNames = {
    'c': 'CFLAGS',
    'c++': 'CXXFLAGS',
    'objective-c': 'OBJCFLAGS',
}

def FlagsFromMakefile(var, flags):
    raw = open('Makefile').read()
    line = re.search(var + '\s*([+?]*=)([^\n]*)', raw)
    if not line:
        return flags

    op = line.group(1)
    val = line.group(2).strip()
    mflags = val.split()
    if op == '=':
        return mflags
    elif op == '+=':
        return flags + mflags
    elif op == '?=' and not flags:
        return mflags
    return flags

def FlagsForLang(lang):
    var = FlagsNames[lang]
    flags = os.getenv(var, '').split()
    if os.path.isfile('Makefile'):
        flags = FlagsFromMakefile(var, flags)
    return flags

def FlagsForFile(filename, **kwargs):
    ft = kwargs['client_data']['&filetype']
    flags = []

    lang = ft
    if ft == 'cpp':
        lang = 'c++'
        flags += ['-std=c++11']
    elif ft == 'objc':
        lang = 'objective-c'

    flags += FlagsForLang(lang) + ['-x', lang]
    return {
        'flags': flags,
        'do_cache': True
    }