Add github action to make sure rust tests are happy #2

	name: PR checks

	on:
	pull_request:
	paths:
	- '.github/workflows/pr_checks_rs.yaml'
	- 'rust/*/.rs'
	- 'rust/**/Cargo.toml'

	concurrency:
	group: ${{ github.ref }}
	cancel-in-progress: true
	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:
	name: Tests
	runs-on: self-hosted

	steps:
	- name: checkout
	uses: actions/checkout@v4

	# This dependency cache allows us to skip downloading and rebuilding dependencies. It saves us a lot of time.
	# Since we're using self-hosted runners, it would be interesting to try sharing attached storage instead of
	# using this over-network cache
	- name: Rust Cache
	uses: Swatinem/[email protected]
	with:
	prefix-key: 'v1-rust'
	# regardless of the 'shared-key', env vars, and cargo lock files are always automatically added to the cache key
	# https://github.com/Swatinem/rust-cache/blob/v2.7.5/src/config.ts#L51
	shared-key: "pro-sdk"
	# this causes painfully slow (~3 min) cache uploading the first time dependencies are updated
	# it saves more than that on all future builds, so it's worth the 1 time cost
	cache-targets: true
	# github does not allow branches to access caches that aren't from the main branch so there's no point in publishing them
	save-if: ${{ github.ref == 'refs/heads/main' }}

	- name: Run doc and unit tests
	run: cargo test --doc --workspace && cargo test --lib --workspace

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