[test] Various cleanup and refactoring #226

	name: CI

	on:
	pull_request:

	env:
	CARGO_TERM_COLOR: always
	RUSTFLAGS: -D warnings
	GHERRIT_TEST_BUILD: 1

	jobs:
	validate:
	name: Validate and Test
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Get Rust Version
	id: rust-version
	# Parse Cargo.toml to get the rust-version. We use sed to avoid dependency
	# on the runner's cargo version (which might not support edition 2024).
	run: echo "version=$(sed -n 's/^rust-version = "$.*$"/\1/p' Cargo.toml)" >> "$GITHUB_OUTPUT"

	- name: Install Rust toolchain
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ steps.rust-version.outputs.version }}
	components: clippy, rustfmt

	- name: Cache intermediate build artifacts
	uses: Swatinem/rust-cache@v2
	with:
	cache-on-failure: "true"

	- name: Check Formatting
	run: \|
	set -eo pipefail
	rustup component add --toolchain nightly rustfmt
	cargo +nightly fmt -- --check

	- name: Clippy (Library & Binaries)
	run: cargo clippy

	- name: Clippy (Tests)
	run: cargo clippy --tests

	- name: Run Tests
	run: cargo test

	- name: Check for TODO comments
	run: \|
	set -eo pipefail

	# Install in the background so it runs in parallel with `curl`.
	sudo apt-get install -y ripgrep &

	# Fetch the check_todo.sh script from the google/zerocopy repository
	curl -sL https://raw.githubusercontent.com/google/zerocopy/main/ci/check_todo.sh -o check_todo.sh
	chmod +x check_todo.sh

	# Wait for the background installation to finish
	wait

	./check_todo.sh .

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