GHA pipeline rewrite for ease and speed #2384

	name: Rustdoc
	on:
	push:
	branches: [main]
	pull_request:
	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.head.label \|\| github.head_ref \|\| github.ref }}
	cancel-in-progress: true
	jobs:
	docs:
	permissions:
	contents: write
	id-token: write
	runs-on: ubuntu-latest-4-cores
	env:
	RUST_TOOLCHAIN: "1.66.0"
	RUSTDOCFLAGS: "-D warnings"
	RUSTC_WRAPPER: "sccache"
	steps:
	- name: Checkout repository
	uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac #v4

	- name: Prep build on Ubuntu
	uses: ./.github/actions/prep-ubuntu
	with:
	RUST_TOOLCHAIN: ${{ env.RUST_TOOLCHAIN }}
	cache: enabled
	# Cache needs Google credentials:
	GWIP: ${{ secrets.GWIP_SCCACHE }}
	GSA: ${{ secrets.GSA_SCCACHE }}

	- name: Build documentation
	id: build_docs
	run: cargo doc --all --no-deps


	- name: Build Documentation failed
	if: always() && steps.build_docs.outcome == 'failure'
	run: echo ":::error::cargo doc --all --no-deps failed"
	# Job will stop here and the check will be red if Build documentation failed

	- name: Create Index file
	if: github.ref == 'refs/heads/main'
	run: \|
	echo "<meta http-equiv=\"refresh\" content=\"0; url=centrifuge_chain/index.html\">" \ > ./target/doc/index.html

	- name: Deploy Docs
	uses: peaceiris/actions-gh-pages@373f7f263a76c20808c831209c920827a82a2847 # 3.9.3
	if: github.ref == 'refs/heads/main'
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_branch: gh-pages
	publish_dir: ./target/doc
	cname: reference.centrifuge.io
	force_orphan: true

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