crypto: Add a tutorial to the crypto crate #6279

	name: Code coverage

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]
	types:
	- opened
	- reopened
	- synchronize
	- ready_for_review

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

	env:
	CARGO_TERM_COLOR: always

	jobs:
	code_coverage:
	name: Code Coverage
	runs-on: "ubuntu-latest"
	if: github.event_name == 'push' \|\| !github.event.pull_request.draft

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3
	with:
	ref: ${{ github.event.pull_request.head.sha }}

	- name: Install Rust
	uses: dtolnay/rust-toolchain@stable

	- name: Load cache
	uses: Swatinem/rust-cache@v2
	with:
	save-if: ${{ github.ref == 'refs/heads/main' }}

	- name: Install tarpaulin
	uses: taiki-e/install-action@v2
	with:
	tool: cargo-tarpaulin

	# set up backend for integration tests
	- uses: actions/setup-python@v4
	with:
	python-version: 3.8

	- uses: michaelkaye/setup-matrix-synapse@main
	with:
	installer: poetry
	uploadLogs: true
	httpPort: 8228
	disableRateLimiting: true

	- name: Run tarpaulin
	run: \|
	cargo tarpaulin --out Xml -e sliding-sync-integration-test --features testing

	- name: Upload to codecov.io
	uses: codecov/codecov-action@v3
	with:
	# Work around frequent upload errors, for runs inside the main repo (not PRs from forks).
	# Otherwise not required for public repos.
	token: ${{ secrets.CODECOV_UPLOAD_TOKEN }}
	# The upload sometimes fails due to https://github.com/codecov/codecov-action/issues/837.
	# To make sure that the failure gets flagged clearly in the UI, fail the action.
	fail_ci_if_error: true

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