Build script that creates necessary directories / files instead of platform-dependent Makefile

[radu-matei]

We recently added support for building and running Wagi on Windows (#60) -- but because of the platform-dependent Makefile, you cannot make run on Windows.

We should either add a separate target for Windows, or move the logic to create the directories and certificates in a build.rs script.

Note that setting the log environment variables still needs to be in the Makefile, and that is going to have to be platform dependent.

[technosophos]

I am not wading into the waters on Windows and Make. It's nearly impossible to keep a Makefile functional for Windows without making it a nightmare for everyone else.

So a build.rs is fine with me, or we could go back to using Just and Justfiles (which are explicitly tooled for running unixy commands on Windows). In fact, it might be worth trying to run just -f Makefile run to see if it even comes close to working as-is.

[bacongobbler]

Makefiles have never really had a great cross-platform story, unfortunately. Same for justfiles. Have a look at krustlet's justfile/justfile-windows story for example: https://github.com/deislabs/krustlet/blob/main/justfile-windows

Lotta code duplication just to have a "cross-platform" build toolchain.

[technosophos]

So we seem to have a few options on the table:

• a build.rs
• a completely separate build script for Windows
• a generic Makefile that somehow works for UNIXy and Windows
• find another build system