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'''
Created on 2 oct. 2014
@author: coissac
'''
import imp
import importlib
from distutils.errors import DistutilsError
from distutils.version import StrictVersion
from distutils import log
from obidistutils.serenity.globals import local_cython # @UnusedImport
from obidistutils.serenity.checkpip import get_a_pip_module
from obidistutils.serenity.checkpackage import get_package_requirement
from obidistutils.serenity.checkpackage import parse_package_requirement
from obidistutils.serenity.checkpackage import is_installed
from obidistutils.serenity.checkpackage import pip_install_package
from obidistutils.serenity.util import get_serenity_dir
def get_a_cython_module(pip=None):
global local_cython
if not local_cython:
if pip is None:
pip = get_a_pip_module()
cython_req = get_package_requirement('Cython',pip)
if cython_req is None:
cython_req='Cython'
requirement_project,requirement_relation,minversion = parse_package_requirement(cython_req) # @UnusedVariable
if cython_req is None or not is_installed(cython_req, pip):
tmpdir = get_serenity_dir()
ok = pip_install_package(cython_req,directory=tmpdir,pip=pip)
log.debug('temp install dir : %s' % tmpdir)
if ok!=0:
raise DistutilsError("I cannot install a cython package")
f, filename, description = imp.find_module('Cython', [tmpdir])
cythonmodule = imp.load_module('Cython', f, filename, description)
if minversion is not None:
assert StrictVersion(cythonmodule.__version__) >= minversion, \
"Unable to find suitable version of cython get %s instead of %s" % (cythonmodule.__version__,
minversion)
else:
cythonmodule = importlib.import_module('Cython')
local_cython.append(cythonmodule)
return local_cython[0]
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