Update setup.py to allow optional compilation of C accellerators modules

Author: asvetlov

MANIFEST.in

@@ -8,3 +8,5 @@ graft docs
 graft examples
 graft tests
 global-exclude *.pyc
+exclude aiohttp/_multidict.html
+exclude aiohttp/_multidict.*.so

Makefile

@@ -37,6 +37,10 @@ clean:
 	rm -rf cover
 	make -C docs clean
 	python setup.py clean
+	rm -f aiohttp/_multidict.html
+	rm -f aiohttp/_multidict.c
+	rm -f aiohttp/_multidict.*.so
+	rm -f aiohttp/_multidict.*.pyd
 
 doc:
 	make -C docs html

setup.py

@@ -3,6 +3,9 @@
 import re
 import sys
 from setuptools import setup, find_packages, Extension
+from distutils.errors import (CCompilerError, DistutilsExecError,
+                              DistutilsPlatformError)
+from distutils.command.build_ext import build_ext
 
 
 try:
@@ -21,6 +24,26 @@
     extensions = cythonize(extensions)
 
 
+class BuildFailed(Exception):
+    pass
+
+
+class ve_build_ext(build_ext):
+    # This class allows C extension building to fail.
+
+    def run(self):
+        try:
+            build_ext.run(self)
+        except DistutilsPlatformError:
+            raise BuildFailed()
+
+    def build_extension(self, ext):
+        try:
+            build_ext.build_extension(self, ext)
+        except (CCompilerError, DistutilsExecError, DistutilsPlatformError):
+            raise BuildFailed()
+
+
 with codecs.open(os.path.join(os.path.abspath(os.path.dirname(
         __file__)), 'aiohttp', '__init__.py'), 'r', 'latin1') as fp:
     try:
@@ -40,26 +63,37 @@
 def read(f):
     return open(os.path.join(os.path.dirname(__file__), f)).read().strip()
 
+args = dict(
+    name='aiohttp',
+    version=version,
+    description=('http client/server for asyncio'),
+    long_description='\n\n'.join((read('README.rst'), read('CHANGES.txt'))),
+    classifiers=[
+        'License :: OSI Approved :: Apache Software License',
+        'Intended Audience :: Developers',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Topic :: Internet :: WWW/HTTP'],
+    author='Nikolay Kim',
+    author_email='[email protected]',
+    url='https://github.com/KeepSafe/aiohttp/',
+    license='Apache 2',
+    packages=find_packages(),
+    install_requires=install_requires,
+    tests_require=tests_require,
+    test_suite='nose.collector',
+    include_package_data=True,
+    ext_modules=extensions,
+    cmdclass=dict(build_ext=ve_build_ext))
 
-setup(name='aiohttp',
-      version=version,
-      description=('http client/server for asyncio'),
-      long_description='\n\n'.join((read('README.rst'), read('CHANGES.txt'))),
-      classifiers=[
-          'License :: OSI Approved :: Apache Software License',
-          'Intended Audience :: Developers',
-          'Programming Language :: Python',
-          'Programming Language :: Python :: 3',
-          'Programming Language :: Python :: 3.3',
-          'Programming Language :: Python :: 3.4',
-          'Topic :: Internet :: WWW/HTTP'],
-      author='Nikolay Kim',
-      author_email='[email protected]',
-      url='https://github.com/KeepSafe/aiohttp/',
-      license='Apache 2',
-      packages=find_packages(),
-      install_requires=install_requires,
-      tests_require=tests_require,
-      test_suite='nose.collector',
-      include_package_data=True,
-      ext_modules=extensions)
+try:
+    setup(**args)
+except BuildFailed:
+    print("*************************************************************")
+    print("Cannot compile C accellerator module, use pure python version")
+    print("*************************************************************")
+    del args['ext_modules']
+    del args['cmdclass']
+    setup(**args)