Custom Target Source Script

Usage
1

I would like to make a custom target which could build a local existing make based project. Something like

find_file(SetEnvFile
  NAME    set-env.sh
  PATHS   ${path-discovered-during-configuration}/*
  REQUIRED
)

add_custom_target(Foo
  COMMAND source ${SetEnvFile}
  COMMAND $(MAKE)
  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
)

However, I’ve found I actually can’t use source in my command. Do I have another option here? The trick in my situation is that CMake configuration (in my case CPM.cmake) figure out where the file is. So I can’t actually source it before running cmake.

The only workaround I can think of right now is to do something like

find_file(SetEnvFile
  NAME    set-env.sh
  PATHS   ${path-discovered-during-configuration}/*
  REQUIRED
)

add_custom_target(Foo
  COMMAND ./customBuildScript.sh ${SetEnvFile}
  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
)
2

You’ll have to have a script source it internally before running what you want. That customBuildScript.sh pattern looks like what I’d end up doing.