Rewrite build system in rust

[bjorn3]

This would make it easier to build on windows.

The build system should keep allowing changes to be made to the list of things to do while a build is running by re-reading a config file at various points in the build process. The current shell scripts can be edited while they are running, which saves me a lot of time when I realize mid-build that a certain step can or can't be skipped.

Todo

• [x] Rewrite test.sh in rust
• [ ] ~~Rewrite clean_all.sh in rust~~ (a program can't remove itself on windows)
• [ ] Add a windows variant of clean_all.sh
• [ ] Rewrite other shell scripts in rust (low priority)

[afonso360]

I'm planning on moving test.sh over to y.rs, since its really hard to run tests on windows right now.

[bjorn3]

I would like if it remains possible to disable tests while it is running. I often use the fact that bash reads shell script commands just before executing them to disable tests that I don't need while it is running in order to save time. (I often forget to do this before I started the tests.) Aborting and restarting would require rerunning tests again, which wastes time.

One way to do this I think would be to have a dsl for specifying tests and have the test runner parse the test specification after every step, skipping tests that have already succeeded.

[afonso360]

What do you think about using the existing config.txt system?

We can add a key for each testsuite such as:

test.mod_bench=true
test.simple-raytracer=true
test.libcore=false

The infrastructure is already there, we just need to query each key before running the test.

[bjorn3]

That would also work and is probably simpler to implement.

[bjorn3]

The main build system is now entirely written in rust. For clean_all.sh it is easy to manually run the commands. And for the remaining shell scripts in scripts/ I don't think there is much of a benefit to rewriting them as they are either mostly used on CI or just by myself.