CPack External generator runs CPACK_EXTERNAL_PACKAGE_SCRIPT before creating JSON metadata

Usage
1

Hi.

I’m having some trouble understanding how the CPack external generator is supposed to work. I’m running CPack via the CMake “package” target. In CMake I’m setting CPACK_EXTERNAL_PACKAGE_SCRIPT to point to a CMake script that invokes an external tool using execute_process. I want the external process to read the metadata from the CPack generated JSON file and use it to package my library. However, when I run a clean build, the external script runs before the JSON metadata is created causing my packaging step to fail. Is there a way to instruct CPack to generate the JSON metadata before my external script is executed?

Thanks.

2

It looks like the package.json is written out before the script is executed. Could you get a trace of why the package.json is disappearing perhaps?