fix #74

	---
	name: CI
	on: [ push, pull_request ]
	concurrency:
	group: "pages"
	cancel-in-progress: true
	jobs:
	nix-channel-deploy:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: cachix/install-nix-action@v15
	with:
	nix_path: nixpkgs=channel:nixos-unstable
	extra_nix_config: \|
	access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
	- env:
	NIX_CACHE_PRIV_KEY: ${{ secrets.NIX_CACHE_PRIV_KEY }}
	shell: bash
	run: \|
	set -e -x -o pipefail
	mkdir -p "_output/cache"
	echo "nix.hydro.ac" >"_output/CNAME"
	git rev-parse HEAD >"_output/git-revision"
	tar -cJf "_output/nixexprs.tar.xz" ./*.nix \
	--transform "s,^,${PWD##*/}/," \
	--owner=0 --group=0 --mtime="1970-01-01 00:00:00 UTC"
	touch "_output/index.html"

	printf 'https://nix-bin.hydro.ac/' >"_output/binary-cache-url"
	# mapfile -t OUT_PATHS < <(nix-build)
	# export NIX_SECRET_KEY_FILE="$PWD/nix-cache-priv-key.pem"
	# echo "$NIX_CACHE_PRIV_KEY" >"$NIX_SECRET_KEY_FILE"
	# nix store sign -k "$NIX_SECRET_KEY_FILE" "${OUT_PATHS[@]}"
	# nix copy --to "file:///$PWD/_output/cache" "${OUT_PATHS[@]}"
	echo "Priority: 40" >>"_output/cache/nix-cache-info"
	- name: deploy
	uses: JamesIves/[email protected]
	if: github.ref == 'refs/heads/master'
	with:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	BRANCH: gh-pages
	FOLDER: _output

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