Rust

Update docs. #114

	name: Rust

	on:
	push:
	branches:
	- '**' # matches every branch
	pull_request:
	branches:
	- '**' # matches every target branch

	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:
	# Simple Ubuntu image, we use rustup
	runs-on: ubuntu-latest

	# Matrix build, over stable vs nightly and features
	strategy:
	fail-fast: false
	matrix:
	rust: [nightly]
	features: ["--", "--no-default-features", "--all-features"]
	exclude:
	# excludes --all-features on stable, because some features might
	# require nightly Rust
	- rust: stable
	features: "--all-features"

	# The steps
	steps:
	# Getting the code
	- uses: actions/checkout@v2
	# Getting AVR tools (such as `avr-gcc`)
	- name: Install AVR toolchain
	run: sudo apt install -y gcc-avr avr-libc
	# Installing the selected Rust version
	# Doesn't make sense with a pined toolchain
	#- name: Install Rust ${{ matrix.rust }}
	# uses: actions-rs/toolchain@v1
	# with:
	# toolchain: ${{ matrix.rust }}
	# profile: minimal
	# override: true
	# components: rustfmt, rust-src
	# Building on the default target (i.e. AVR)
	- name: Build with defaults
	run: cargo build --verbose ${{ matrix.features }}
	- name: Build examples with defaults
	run: cargo build --examples --verbose ${{ matrix.features }}
	# Testing on the host target
	- name: Clean local cargo-config
	run: rm -f .cargo/config.toml
	- name: Run tests
	run: cargo test --verbose ${{ matrix.features }}
	- name: Check formatting
	if: ${{ matrix.rust == 'nightly' }}
	run: cargo fmt -- --check

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