[cpack/jenkins-main] rework build tag generation to be at cpack time through LY_INSTALLER_AUTO_GEN_TAG

cmake/PackagingConfig.cmake

@@ -0,0 +1,52 @@
+#
+# All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+# its licensors.
+#
+# For complete copyright and license terms please see the LICENSE at the root of this
+# distribution (the "License"). All use of this software is governed by the License,
+# or, if provided, by the license below or the license accompanying this file. Do not
+# remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#
+
+set(_target_name ${CMAKE_HOST_SYSTEM_NAME})
+if(${_target_name} STREQUAL Darwin)
+    set(_target_name Mac)
+endif()
+
+if(CPACK_AUTO_GEN_TAG)
+    set(_python_script python.sh)
+    if(${_target_name} STREQUAL WINDOWS)
+        set(_python_script python.cmd)
+    endif()
+
+    file(REAL_PATH "${CPACK_SOURCE_DIR}/.." _root_path)
+    file(TO_NATIVE_PATH "${_root_path}/python/${_python_script}" _python_cmd)
+    file(TO_NATIVE_PATH "${_root_path}/scripts/build/tools/generate_build_tag.py" _gen_tag_script)
+
+    execute_process(
+        COMMAND ${_python_cmd} -s -u ${_gen_tag_script}
+        RESULT_VARIABLE _gen_tag_result
+        OUTPUT_VARIABLE _gen_tag_output
+        ERROR_VARIABLE _gen_tag_errors
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        ERROR_STRIP_TRAILING_WHITESPACE
+    )
+
+    if (NOT ${_gen_tag_result} EQUAL 0)
+        message(FATAL_ERROR "Failed to generate build tag!")
+    endif()
+
+    set(_url_tag ${_gen_tag_output})
+else()
+    set(_url_tag ${CPACK_PACKAGE_VERSION})
+endif()
+
+set(_full_tag ${_url_tag}/${_target_name})
+
+if(CPACK_DOWNLOAD_SITE)
+    set(CPACK_DOWNLOAD_SITE ${CPACK_DOWNLOAD_SITE}/${_full_tag})
+endif()
+if(CPACK_UPLOAD_URL)
+    set(CPACK_UPLOAD_URL ${CPACK_UPLOAD_URL}/${_full_tag})
+endif()