cmake: Refactor code introducing ITKPythonPackage module

Author: jcfr

CMakeLists.txt

@@ -50,31 +50,14 @@ if(ITKPythonPackage_SUPERBUILD)
   endif()
 
   #-----------------------------------------------------------------------------
+  set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
   include(ExternalProject)
+  include(ITKPythonPackage)
 
   set(ITK_REPOSITORY "https://github.com/InsightSoftwareConsortium/ITK.git")
   # ITK nightly-master 2017-06-07
   set(ITK_GIT_TAG "a6ec54b")
 
-  # Add an empty external project
-  function(itk_ExternalProject_Add_Empty proj depends)
-    set(depends_args)
-    if(NOT depends STREQUAL "")
-      set(depends_args DEPENDS ${depends})
-    endif()
-    ExternalProject_add(${proj}
-      SOURCE_DIR ${CMAKE_BINARY_DIR}/${proj}
-      DOWNLOAD_COMMAND ""
-      UPDATE_COMMAND ""
-      CONFIGURE_COMMAND ""
-      BUILD_COMMAND ""
-      BUILD_IN_SOURCE 1
-      BUILD_ALWAYS 1
-      INSTALL_COMMAND ""
-      ${depends_args}
-      )
-  endfunction()
-
   #-----------------------------------------------------------------------------
   # A separate project is used to download ITK, so that it can reused
   # when building different "flavor" of ITK python packages
@@ -102,7 +85,7 @@ if(ITKPythonPackage_SUPERBUILD)
 
   else()
 
-    itk_ExternalProject_Add_Empty(
+    ipp_ExternalProject_Add_Empty(
       ITK-source-download
       ""
       )

MANIFEST.in

@@ -1,4 +1,5 @@
 include CMakeLists.txt
+include cmake/*.cmake
 include README.md
 include itkVersion.py
 include scripts/dockcross-manylinux-build-wheels.sh

cmake/ITKPythonPackage.cmake

@@ -0,0 +1,20 @@
+
+
+# Add an empty external project
+function(ipp_ExternalProject_Add_Empty proj depends)
+  set(depends_args)
+  if(NOT depends STREQUAL "")
+    set(depends_args DEPENDS ${depends})
+  endif()
+  ExternalProject_add(${proj}
+    SOURCE_DIR ${CMAKE_BINARY_DIR}/${proj}
+    DOWNLOAD_COMMAND ""
+    UPDATE_COMMAND ""
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ""
+    BUILD_IN_SOURCE 1
+    BUILD_ALWAYS 1
+    INSTALL_COMMAND ""
+    ${depends_args}
+    )
+endfunction()