fix: make codex conditional on system hash availability in flake.nix #16

	name: Prek

	on:
	push:
	branches: [main]
	pull_request:

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	permissions:
	contents: read

	jobs:
	determine-runner:
	runs-on: ubuntu-latest
	outputs:
	runner: ${{ steps.runner.outputs.use-runner }}
	steps:
	- name: Determine runner
	id: runner
	uses: mikehardy/runner-fallback-action@v1
	with:
	github-token: ${{ secrets.GH_RUNNER_TOKEN }}
	primary-runner: self-hosted-16-cores
	fallback-runner: ubuntu-latest
	organization: fuww
	fallback-on-error: true

	prek:
	runs-on: ${{ fromJson(needs.determine-runner.outputs.runner) }}
	needs: [determine-runner]
	steps:
	- uses: actions/checkout@v4
	- uses: DeterminateSystems/nix-installer-action@main
	- uses: DeterminateSystems/magic-nix-cache-action@main
	- name: Run prek checks
	run: nix develop --command prek run --all-files

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