"external xtasks" pattern; wire up `cargo xtask releng` #4920

	# This workflow file serves as an example for cargo-hakari CI integration.

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	name: cargo hakari

	jobs:
	workspace-hack-check:
	name: Check workspace-hack
	runs-on: ubuntu-latest
	env:
	RUSTFLAGS: -D warnings
	steps:
	- uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4
	with:
	ref: ${{ github.event.pull_request.head.sha }} # see omicron#4461
	- uses: actions-rs/toolchain@16499b5e05bf2e26879000db0c1d13f7e13fa3af # v1
	with:
	toolchain: stable
	- name: Install cargo-hakari
	uses: taiki-e/install-action@2f990e9c484f0590cb76a07296e9677b417493e9 # v2
	with:
	tool: cargo-hakari
	- name: Check workspace-hack Cargo.toml is up-to-date
	uses: actions-rs/cargo@844f36862e911db73fe0815f00a4a2602c279505 # v1
	with:
	command: hakari
	args: generate --diff
	- name: Check all crates depend on workspace-hack
	uses: actions-rs/cargo@844f36862e911db73fe0815f00a4a2602c279505 # v1
	with:
	command: hakari
	args: manage-deps --dry-run

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