cmake: add python stub

Might not be the best approach, maybe use thewtex/cython-cmake-example?

CMakeLists.txt

@@ -509,8 +509,8 @@ add_subdirectory(third-party)
 add_subdirectory(src)
 #add_subdirectory(src/includes)
 add_subdirectory(examples)
-if(0)
 add_subdirectory(python)
+if(0)
 add_subdirectory(tests)
 #add_subdirectory(tests/testdata)
 add_subdirectory(integration-tests)

python/CMakeLists.txt

+# EXTRA_DIST = cnghttp2.pxd nghttp2.pyx
+
+# XXX consider https://github.com/thewtex/cython-cmake-example
+
+if(ENABLE_PYTHON_BINDINGS)
+  # XXX add ALL? Will always be invoked as target is always out-of-date though.
+  add_custom_target(python
+    COMMAND ${PYTHON_EXECUTABLE} setup.py build
+    DEPENDS nghttp2.c
+  )
+
+  add_custom_target(python-install
+    COMMAND ${PYTHON_EXECUTABLE} setup.py install --prefix=${DESTDIR}${CMAKE_INSTALL_PREFIX}
+  )
+
+  # XXX cmake does not have an uninstall target, do not bother with this then.
+  # XXX glob patterns like this will probably not work
+  #add_custom_target(python-uninstall
+  #  COMMAND ${CMAKE} -E remove -f ${DESTDIR}${CMAKE_INSTALL_FULL_LIBDIR}/python*/site-packages/nghttp2.so
+  #  COMMAND ${CMAKE} -E remove -f ${DESTDIR}${CMAKE_INSTALL_FULL_LIBDIR}/python*/site-packages/python_nghttp2-*.egg
+  #)
+
+  # XXX cleaner way to advertise the build artifacts? (note nghttp2.c is cleaned automatically)
+  add_custom_target(python-clean
+    COMMAND ${PYTHON_EXECUTABLE} setup.py clean --all
+  )
+
+  # XXX CYTHON_EXECUTABLE is not set!
+  add_custom_command(OUTPUT nghttp2.c
+    COMMAND ${CYTHON_EXECUTABLE} -o nghttp2.c nghttp2.pyx
+    DEPENDS nghttp2.pyx
+  )
+endif()