Update flake lockfile #18

	name: Update flake lockfile

	on:
	schedule:
	# every Monday
	- cron: '0 0 * * 1'
	workflow_dispatch:

	jobs:
	check-update:
	runs-on: ubuntu-latest
	outputs:
	has_diff: ${{ steps.check-diff.outputs.has_diff }}
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: cachix/install-nix-action@v26
	with:
	nix_path: "nixpkgs=channel:release-23.11"
	- name: Update
	run: nix flake update
	- name: Check diff
	id: check-diff
	run: \|
	if git diff --exit-code flake.lock > /dev/null; then
	echo "has_diff=false" >> "$GITHUB_OUTPUT"
	else
	echo "has_diff=true" >> "$GITHUB_OUTPUT"
	fi

	update-flake-lock:
	runs-on: ubuntu-latest
	needs: check-update
	if: needs.check-update.outputs.has_diff == 'true'
	permissions:
	contents: write
	pull-requests: write
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: cachix/install-nix-action@v26
	with:
	nix_path: "nixpkgs=channel:release-23.11"
	- name: Update
	run: nix flake update
	- name: git commit and push
	run: \|
	git config user.name "GitHub Actions"
	git config user.email "[email protected]"
	BRANCH_NAME="update-$(date +'%Y%m%d')"
	git switch -c "$BRANCH_NAME"
	git add flake.lock
	git commit -m ":arrow_up: CI: update nix flake"
	git push origin "$BRANCH_NAME"
	- name: Create pull request
	run: \|
	gh pr create --title "CI: update flake" --body "" --base main --assignee H1rono
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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