Bump syn from 2.0.26 to 2.0.28 #766

	name: Rust

	on:
	push:
	branches: [main, "*.x"]
	pull_request:
	release:
	types: [created]

	env:
	RUST_BACKTRACE: "1"
	RUST_LOG: "info"
	# speed up build by using clang/lld
	CC: "clang-14"
	CXX: "clang++-14"
	LD: "clang-14"
	LDFLAGS: "-fuse-ld=lld-14"
	RUSTFLAGS: "-C linker=clang-14 -C link-arg=-fuse-ld=lld-14"

	jobs:
	test:
	strategy:
	fail-fast: false
	matrix:
	rust:
	- toolchain: "stable"
	- toolchain: "nightly"
	name: "Test (Rust ${{matrix.rust.toolchain}})"
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- uses: dtolnay/rust-toolchain@v1
	with:
	toolchain: "${{matrix.rust.toolchain}}"
	id: "rust-toolchain"

	- uses: actions/cache@v3
	with:
	path: \|
	~/.cargo/git
	~/.cargo/registry
	target
	key: "${{runner.os}} Rust ${{steps.rust-toolchain.outputs.cachekey}}"

	- run: cargo test
	- name: cargo run
	run: \|
	cargo run -- --bin
	git diff --exit-code README.md

	rustfmt:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- uses: dtolnay/rust-toolchain@nightly
	with:
	components: rustfmt
	- run: ./rustfmt.sh --check

	docker:
	runs-on: ubuntu-latest
	needs: [test]
	if: startsWith(github.ref, 'refs/tags/')
	steps:
	- uses: actions/checkout@v3
	- name: Log In at ghcr.io
	run: echo "${{secrets.GITHUB_TOKEN}}" \| docker login ghcr.io -u msrd0 --password-stdin
	- name: Build and Push image to ghcr.io
	run: \|
	image="ghcr.io/msrd0/cargo-doc2readme"
	tag="$image:$(git describe --tags)"

	echo "==> Building docker image"
	docker build . --pull --tag "$image"
	docker tag "$image" "$tag"

	echo "==> Pushing docker image"
	docker push "$tag"
	docker push "$image"

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