Rust

bump clap 3 -> 4 #165

	name: Rust

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

	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:
	strategy:
	matrix:
	rust: [ stable, beta, nightly ]
	include:
	- rust: nightly
	check_cfg: '-Zcheck-cfg'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Set up Rust toolchain
	run: \|
	rustup toolchain install --no-self-update --profile minimal ${{ matrix.rust }}
	rustup default ${{ matrix.rust }}
	# Add a big endian target so we can check that everything at least
	# compiles on big endian.
	rustup target add --toolchain ${{ matrix.rust }} powerpc64-unknown-linux-gnu
	- name: Build
	run: cargo build --verbose --all ${{ matrix.check_cfg }}
	- name: Run tests
	run: cargo test --verbose --all ${{ matrix.check_cfg }}
	- name: Docs
	run: cargo doc --verbose --no-deps
	- name: Check big endian
	run: cargo check --target powerpc64-unknown-linux-gnu --verbose --all
	success:
	needs:
	- build
	runs-on: ubuntu-latest
	# GitHub branch protection is exceedingly silly and treats "jobs skipped because a dependency
	# failed" as success. So we have to do some contortions to ensure the job fails if any of its
	# dependencies fails.
	if: always() # make sure this is never "skipped"
	steps:
	# Manually check the status of all dependencies. `if: failure()` does not work.
	- name: check if any dependency failed
	run: jq --exit-status 'all(.result == "success")' <<< '${{ toJson(needs) }}'

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