How to compute Hunter/Toolchain/Config ID

[chfast]

Is there a way to compute the Hunter/Toolchain/Config IDs without running full CMake configuration? I want to use these in CI deps cache ID.

[NeroBurner]

Yes, there is, but you'd have to reiimplement many of the things CMake does for you and the things Hunter does. If you want to try anyways, the following documentation could be very helpful for you

https://hunter.readthedocs.io/en/latest/overview/customization.html

[chfast]

Is there a way to run cmake to compute it by hunter but without downloading and building dependencies?

[NeroBurner]

I haven't tried, but you could create a CMakeLists.txt (or modify your project one), which exits right after the HunterGate() command and writes the Hunter-ID variables to a file, or just print them to the console)

What exactly would be the use-case? If you want a specific folder to be cached you could set a HUNTER_ROOT environment variable for each architecture you want to build or something like that. I'm doing that to get distinct hunter-cache folders for the different Ubuntu versions I build for (and then I can selectively delete them)

[chfast]

This should be a good cache key on CI servers.