Rust

allow easy adjustment of Fibonacci sequence benchmark #890

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	name: Rust

	jobs:
	build:
	name: Build, lint, test
	runs-on: ubuntu-latest
	steps:
	- name: Checkout sources
	uses: actions/checkout@v3

	- name: Install stable toolchain
	uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: stable
	override: true

	# We always build with latest stable, but we also reset
	# the CI cache when new versions of Rust are released.
	- name: Determine build cache key
	id: vars
	run: \|
	RUST_VERSION=$(rustc -V \| grep -Po '(?<=^rustc )\S+')
	echo "rustc-version=$RUST_VERSION" >> $GITHUB_OUTPUT

	# 1. Use `**/Cargo.toml` in cache key because Cargo.lock isn't committed.
	# 2. Don't include target/ -- only cache building 3rd-party libraries.
	- name: Use build cache
	uses: actions/cache@v3
	with:
	path: \|
	~/.cargo/bin/
	~/.cargo/registry/index/
	~/.cargo/registry/cache/
	~/.cargo/git/db/
	target/
	key: ${{ runner.os }}-cargo-${{ steps.vars.outputs.rustc-version }}-${{ hashFiles('**/Cargo.toml') }}

	- name: Build constraints
	run: cargo run --bin constraint-evaluation-generator

	- name: Run fmt
	run: cargo fmt --all -- --check

	- name: Run clippy
	run: cargo clippy --all-targets -- -D warnings

	- name: Run tests
	run: cargo test

	- name: Build benchmarks
	run: cargo bench --all-targets --no-run

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