[cpack_installer] cpack variable usage cleanup

cmake/Packaging.cmake

@@ -31,12 +31,12 @@ set(CPACK_RESOURCE_FILE_LICENSE ${DEFAULT_LICENSE_FILE})
 
 set(CPACK_PACKAGE_INSTALL_DIRECTORY "${CPACK_PACKAGE_VENDOR}/${CPACK_PACKAGE_VERSION}")
 
-# custom cpack cache variables for use in pre/post build scripts
+# CMAKE_SOURCE_DIR doesn't equate to anything during execution of pre/post build scripts.
+# to pass it down, we can utilize the auto-caching of any variable with prefix "CPACK_"
 set(CPACK_SOURCE_DIR ${CMAKE_SOURCE_DIR}/cmake)
-set(CPACK_BINARY_DIR ${CMAKE_BINARY_DIR}/installer)
 
 # attempt to apply platform specific settings
-ly_get_absolute_pal_filename(pal_dir ${CMAKE_SOURCE_DIR}/cmake/Platform/${PAL_HOST_PLATFORM_NAME})
+ly_get_absolute_pal_filename(pal_dir ${CPACK_SOURCE_DIR}/Platform/${PAL_HOST_PLATFORM_NAME})
 include(${pal_dir}/Packaging_${PAL_HOST_PLATFORM_NAME_LOWERCASE}.cmake)
 
 # if we get here and the generator hasn't been set, then a non fatal error occurred disabling packaging support
@@ -89,7 +89,7 @@ ly_configure_cpack_component(
 if(LY_INSTALLER_DOWNLOAD_URL)
     cpack_configure_downloads(
         ${LY_INSTALLER_DOWNLOAD_URL}
-        UPLOAD_DIRECTORY artifacts
+        UPLOAD_DIRECTORY ${CMAKE_BINARY_DIR}/_CPack_Uploads # to match the _CPack_Packages directory
         ALL
     )
 endif()

cmake/Platform/Windows/PackagingPostBuild.cmake

@@ -9,49 +9,53 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
 
-# convert the path to a windows style path
-string(REPLACE "/" "\\" _install_dir ${CPACK_PACKAGE_INSTALL_DIRECTORY})
+# convert the path to a windows style path using string replace because TO_NATIVE_PATH
+# only works on real paths
+string(REPLACE "/" "\\" _fixed_package_install_dir ${CPACK_PACKAGE_INSTALL_DIRECTORY})
 
 # directory where the auto generated files live e.g <build>/_CPack_Package/win64/WIX
-set(_cpack_out_dir "${CPACK_TOPLEVEL_DIRECTORY}")
-set(_out_dir "${CPACK_BINARY_DIR}/wixobj_bootstrap")
+set(_cpack_wix_out_dir ${CPACK_TOPLEVEL_DIRECTORY})
+set(_bootstrap_out_dir "${CPACK_TOPLEVEL_DIRECTORY}/bootstrap")
 
-set(_wix_ext_flags
+set(_bootstrap_filename "${CPACK_PACKAGE_FILE_NAME}.exe")
+set(_bootstrap_output_file ${_cpack_wix_out_dir}/${_bootstrap_filename})
+
+set(_ext_flags
     -ext WixBalExtension
 )
 
+set(_addtional_defines
+    -dCPACK_DOWNLOAD_SITE=${CPACK_DOWNLOAD_SITE}
+    -dCPACK_LOCAL_INSTALLER_DIR=${_cpack_wix_out_dir}
+    -dCPACK_PACKAGE_FILE_NAME=${CPACK_PACKAGE_FILE_NAME}
+    -dCPACK_PACKAGE_INSTALL_DIRECTORY=${_fixed_package_install_dir}
+)
+
 set(_candle_command
-    ${CPACK_WIX_ROOT}/bin/candle.exe
+    ${CPACK_WIX_CANDLE_EXECUTABLE}
     -nologo
     -arch x64
-    "-I${_cpack_out_dir}"
-    ${_wix_ext_flags}
-
-    -dCPACK_DOWNLOAD_SITE=${CPACK_DOWNLOAD_SITE}
-    -dCPACK_LOCAL_INSTALLER_DIR=${_cpack_out_dir}
-    -dCPACK_PACKAGE_FILE_NAME=${CPACK_PACKAGE_FILE_NAME}
-    -dCPACK_PACKAGE_INSTALL_DIRECTORY=${_install_dir}
-
+    "-I${_cpack_wix_out_dir}" # to include cpack_variables.wxi
+    ${_addtional_defines}
+    ${_ext_flags}
     "${CPACK_SOURCE_DIR}/Platform/Windows/PackagingBootstrapper.wxs"
-
-    -o "${_out_dir}"
+    -o "${_bootstrap_out_dir}/"
 )
 
 set(_light_command
-    ${CPACK_WIX_ROOT}/bin/light.exe
+    ${CPACK_WIX_LIGHT_EXECUTABLE}
     -nologo
-    ${_wix_ext_flags}
-    ${_out_dir}/*.wixobj
-
-    -o "${CPACK_BINARY_DIR}/installer.exe"
+    ${_ext_flags}
+    ${_bootstrap_out_dir}/*.wixobj
+    -o "${_bootstrap_output_file}"
 )
 
 message(STATUS "Creating Installer Bootstrapper...")
-
 execute_process(
-    COMMAND
-        ${_candle_command}
-
-    COMMAND
-        ${_light_command}
+    COMMAND ${_candle_command}
+    COMMAND_ERROR_IS_FATAL ANY
+)
+execute_process(
+    COMMAND ${_light_command}
+    COMMAND_ERROR_IS_FATAL ANY
 )

cmake/Platform/Windows/Packaging_windows.cmake

@@ -32,7 +32,7 @@ set(CPACK_GENERATOR "WIX")
 # however, they are unique for each run.  instead, let's do the auto generation here and add it to
 # the cache for run persistence.  an additional cache file will be used to store the information on
 # the original generation so we still have the ability to detect if they are still being used.
-set(_guid_cache_file "${CPACK_BINARY_DIR}/wix_guid_cache.cmake")
+set(_guid_cache_file "${CMAKE_BINARY_DIR}/CPackWiXConfig.cmake")
 if(NOT EXISTS ${_guid_cache_file})
     set(_wix_guid_namespace "6D43F57A-2917-4AD9-B758-1F13CDB08593")