It would be very convenient if CPM.cmake supports the cmake --install feature for the generic "find_package() with install prefix" workflow. It will be very convenient for total offline builds (like builds in some Linux distros, or local networks) without actually hardcoding the CPM.cmake inside repo. Furthermore, it also helps distro maintainers to package the libs which already adopted dependency management via CPM.

The potential CMake API would be like (assuming -DCPM_USE_LOCAL_PACKAGES):

find_package(CPM REQUIRED)
CPMAddPackage("some-lib")

I will make a test PR with install() if you won't mind.

Thank you for your attention and for your project.