[release] fix docker image builder #36

	name: Build Docker Image

	# Release on any git tag
	on:
	push:
	tags: ['*']

	jobs:
	build:
	runs-on: [self-hosted, linux, nixos]
	strategy:
	matrix:
	config:
	- blastoise
	- rookidee
	outputs:
	# I hate copy-paste too, but this is GitHub Action, blame them.
	cache-key-blastoise: ${{ steps.build.outputs.cache-key-blastoise }}
	cache-key-rookidee: ${{ steps.build.outputs.cache-key-rookidee }}
	steps:
	- uses: actions/checkout@v4
	with:
	# Checkout the triggered tag name
	ref: ${{ github.ref_name }}
	- name: Build docker image file
	id: build
	env:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	run: \|
	export PATH="$(nix build '.#skopeo.out' --print-out-paths --no-link)/bin:$PATH"
	export PATH="$(nix build '.#gzip.out' --print-out-paths --no-link)/bin:$PATH"
	closure="$(nix build -L '.#t1.${{ matrix.config }}.t1emu.docker-image' --no-link --print-out-paths --impure)"
	skopeo -u "$username" -p "$password" "$registry"
	"$closure" \
	\| gzip --fast \
	\| skopeo copy docker-archive:/dev/stdin docker://"$registry"/chipsalliance/t1-${{ matrix.config }}:latest

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