Reuse the hydra-chain-observer library code to collect the observations #595

	# Build executables to be used on MacOS with Apple silicon (aarch64) CPUs.
	#
	# Produces a dynamic Mach-O binary which is still dynamically linked against
	# system dependencies, but all third-party libraries are statically linked.
	name: MacOS ARM64

	on:
	push:
	branches:
	- "**"
	tags:
	- "..*"

	jobs:
	build-executables:
	name: "Build aarch64-darwin dynamic executables"
	runs-on: [self-hosted, macOS, ARM64]
	steps:
	- name: 📥 Checkout repository
	uses: actions/checkout@v4
	with:
	# Also ensure we have all history with all tags
	fetch-depth: 0

	- name: ❄ Prepare nix
	uses: cachix/install-nix-action@v23
	with:
	extra_nix_config: \|
	accept-flake-config = true
	log-lines = 1000

	- name: ❄ Cachix cache of nix derivations
	uses: cachix/cachix-action@v13
	with:
	name: cardano-scaling
	authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'

	- name: ❄ Build executables
	run: \|
	nix build .#release

	# XXX: Why unzip https://github.com/actions/upload-artifact/issues/39
	- name: 🤐 Unzip and prepare upload
	run: \|
	echo "VERSION=$(git describe --always ${{ github.ref }})" >> "$GITHUB_ENV"
	unzip result/*.zip -d out

	- name: 💾 Upload executables
	uses: actions/upload-artifact@v4
	with:
	name: hydra-aarch64-darwin-${{ env.VERSION }} # automatically zips
	path: out/*

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