BUG20217174: Fix install command honouring --install-lib when given

We add an extra fix for when either one of --install-lib or
--install-purelib is given. When installing the C Extension,
however, --install-lib has to be used.

Author: peeyushgupta

lib/cpy_distutils.py

@@ -1,5 +1,5 @@
 # MySQL Connector/Python - MySQL driver written in Python.
-# Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
 
 # MySQL Connector/Python is licensed under the terms of the GPLv2
 # <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
@@ -416,8 +416,9 @@ class BuildExtStatic(BuildExtDynamic):
     user_options = build_ext.user_options + CEXT_OPTIONS
 
     def finalize_options(self):
-        self.set_undefined_options('install',
-                                   ('with_mysql_capi', 'with_mysql_capi'))
+        if not self.with_mysql_capi:
+            self.set_undefined_options('install',
+                                       ('with_mysql_capi', 'with_mysql_capi'))
 
         build_ext.finalize_options(self)
         self.connc_lib = os.path.join(self.build_temp, 'connc', 'lib')
@@ -514,8 +515,6 @@ def initialize_options(self):
         self.static = None
 
     def finalize_options(self):
-        install.finalize_options(self)
-
         if self.static:
             self.distribution.cmdclass['build_ext'] = BuildExtStatic
 
@@ -529,13 +528,14 @@ def finalize_options(self):
             build.with_mysql_capi = self.with_mysql_capi
             self.need_ext = True
 
-    def run(self):
         if not self.need_ext:
             remove_cext(self.distribution)
-            # We install pure Python code in purelib location when no
-            # extension is build
-            if not self.install_lib or self.install_purelib:
-                self.install_lib = self.install_purelib
+
+        install.finalize_options(self)
+
+    def run(self):
+        if not self.need_ext:
+            log.info("Not Installing C Extension")
         else:
-            log.info("installing C Extension")
+            log.info("Installing C Extension")
         install.run(self)