name: update-flake-lock
on:
  workflow_dispatch:
  schedule:
    - cron: '45 3 * * 1' # runs weekly every Monday at 03:45 UTC

jobs:
  lockfile:
    runs-on: "ubuntu-latest"
    steps:
      - name: "Checkout the repo"
        uses: "actions/checkout@v3"
      - name: "Install the Nix package manager"
        uses: "cachix/install-nix-action@master"
        with:
          github_access_token: ${{ secrets.GITHUB_TOKEN }}
      - name: "Update the lockfile"
        run: |
          git config user.name 'github-actions[bot]'
          git config user.email 'github-actions[bot]@users.noreply.github.com'
          nix flake update --commit-lock-file
          cargo update
          git add Cargo.lock
          # Commit exits with an error when there is nothing to do
          git commit -m "cargo update" || true
      - name: "Create Pull Request"
        uses: "peter-evans/create-pull-request@v5"
        with:
          branch: "auto_update_deps"
          title: "Bump flake.lock and Cargo.lock"
          body: |
            Automatically bumped the lock files.