Auto-update #1148

	name: Auto-update

	on:
	repository_dispatch:
	types: [auto_update]
	schedule: # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule
	- cron: '* 4 * * *'
	workflow_dispatch:
	jobs:
	update-sources:
	runs-on: ubuntu-latest
	permissions:
	contents: write
	pull-requests: write
	steps:
	- uses: actions/checkout@v3
	with:
	token: ${{ secrets.GITHUB_TOKEN }}

	- uses: cachix/install-nix-action@v21
	with:
	nix_path: nixpkgs=channel:nixos-unstable
	github_access_token: ${{ secrets.GITHUB_TOKEN }}
	# extra_nix_config: \|
	# trusted-public-keys = hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
	# substituters = https://hydra.iohk.io https://cache.nixos.org/
	- run: nix flake update

	- name: Commit updated flake
	env:
	GITHUB_JOB: ${{ env.GITHUB_JOB }}
	GITHUB_RUN_ID: ${{ env.GITHUB_RUN_ID }}
	run: \|
	git config --global user.name 'UpdateBot'
	git config --global user.email '[email protected]'
	[ ! -z "$(git status --porcelain)" ] && ( \
	git add flake.lock; \
	git commit -m "flake.lock updated $(date -u +%Y-%m-%d/%H:%M:%S-%Z)"; \
	git push; \
	echo "flake.lock update executed: $?" \
	) \|\| echo "Nothing to commit."

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