I'm a little confused. Rather than a package manager, CMake is a build system, but people have written several[1] package[2] managers[3] in CMake (the language), let alone the other package managers for C/C++, all of which make me question if anyone ever asked for any of them. I don't think those can all be brought under one hat (even if limiting ourselves to just the CMake ones).
OTOH I also think that a CMake importer might not be needed. Contrary to what advocates of language package managers might tell you, packaging is actually easier without them (since the developer first of all has to think about how to reasonably package their stuff for *their own machine* without anything going "lol, let's just download the whole Internet during build"). [1] https://github.com/cpp-pm/hunter [2] https://github.com/cpm-cmake/CPM.cmake [3] https://gracicot.github.io/cmake/2020/04/09/i-made-a-package-manager-using-cmake.html
