[CalendarServer-changes] [15218] OSXFrameworks/trunk/setup.py

[source_changes at macosforge.org]

Revision: 15218
          http://trac.calendarserver.org//changeset/15218
Author:   cdaboo at apple.com
Date:     2015-10-23 12:52:53 -0700 (Fri, 23 Oct 2015)
Log Message:
-----------
Fix pip based setup.

Modified Paths:
--------------
    OSXFrameworks/trunk/setup.py

Modified: OSXFrameworks/trunk/setup.py
===================================================================
--- OSXFrameworks/trunk/setup.py	2015-10-23 19:37:48 UTC (rev 15217)
+++ OSXFrameworks/trunk/setup.py	2015-10-23 19:52:53 UTC (rev 15218)
@@ -1,22 +1,51 @@
 ##
-#    Copyright (c) 2015 Cyrus Daboo. All rights reserved.
+# Copyright (c) 2015 Apple Inc. All rights reserved.
 #
-#    Licensed under the Apache License, Version 2.0 (the "License");
-#    you may not use this file except in compliance with the License.
-#    You may obtain a copy of the License at
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#        http://www.apache.org/licenses/LICENSE-2.0
+# http://www.apache.org/licenses/LICENSE-2.0
 #
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS,
-#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#    See the License for the specific language governing permissions and
-#    limitations under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 ##
 
 from distutils.core import setup
-from osx import _corefoundation_cffi_build
+from distutils.command.build import build
+from distutils.command.install import install
 
+
+# pip imports setup.py prior to doing the actual build and install so it can
+# determine dependency order of modules. The trouble is when it does that, cffi
+# is not actually available, so we are not able to use the
+# ffi.distutils_extension() call to build the extension module list. Instead
+# what we have to do is override the L{Build} and L{Install} setup.py commands
+# to lazily add the extension module list during execution of those commands
+# only (i.e., not during the initial pip import).
+
+def get_ext_modules():
+    from osx import _corefoundation_cffi_build
+    return [_corefoundation_cffi_build.ffi.distutils_extension()]
+
+
+
+class LazyBuild(build):
+    def finalize_options(self):
+        self.distribution.ext_modules = get_ext_modules()
+        build.finalize_options(self)
+
+
+
+class LazyInstall(install):
+    def finalize_options(self):
+        self.distribution.ext_modules = get_ext_modules()
+        install.finalize_options(self)
+
+
 setup(
     name="OSXFrameworks",
     version="0.1",
@@ -29,7 +58,10 @@
         'osx.frameworks',
     ],
     ext_package="osx",
-    ext_modules=[_corefoundation_cffi_build.ffi.distutils_extension()],
     setup_requires=["cffi>=1.3.0"],
     install_requires=["cffi>=1.3.0"],
+    cmdclass={
+        "build": LazyBuild,
+        "install": LazyInstall,
+    }
 )
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