CI improvements #126

	name: Rust

	on:
	push:
	branches: [ master ]
	pull_request:
	types: [opened, synchronize, reopened, ready_for_review]
	branches: [ master ]

	concurrency:
	group: ${{ github.ref }}-${{ github.workflow }}
	cancel-in-progress: true

	env:
	CARGO_TERM_COLOR: always

	jobs:
	formatting:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	components: rustfmt

	- name: Check formatting
	run: cargo fmt --all -- --check

	build-nostd:
	runs-on: ubuntu-latest
	if: github.event.pull_request.draft == false

	needs:
	- formatting

	steps:
	- uses: actions/checkout@v3

	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: nightly
	targets: thumbv7em-none-eabihf

	- name: Build no_std
	run: cargo build --verbose --target thumbv7em-none-eabihf -Z avoid-dev-deps

	tests:
	runs-on: ubuntu-latest
	if: github.event.pull_request.draft == false

	needs:
	- formatting

	strategy:
	matrix:
	rust:
	- stable
	- beta
	- nightly
	- 1.61.0 # MSRV

	steps:
	- uses: actions/checkout@v3

	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ matrix.rust }}

	- name: Check
	run: cargo c --verbose

	- name: Check examples
	run: cargo c --examples --verbose

	- name: Run tests
	run: cargo test --verbose --release

	docs:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable

	- name: Check doc links
	run: \|
	cargo doc --color=never &> ./out
	cat ./out
	! grep "^warning:" ./out

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