name: Check

on:
  push:
    branches:
      - main
  pull_request:

jobs:
  check:
    name: check
    runs-on: ubuntu-latest
    if: |
      contains(github.event.head_commit.message, 'bump:') == false &&
      contains(github.event.head_commit.message, 'Merge pull request') == false
    steps:
      - uses: actions/checkout@v4

      - name: Install nix
        uses: cachix/install-nix-action@v31
        with:
          nix_path: nixpkgs=channel:nixos-unstable

      - name: Use cachix
        uses: cachix/cachix-action@v16
        with:
          name: trevstack
          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"

      - run: nix flake check --accept-flake-config

  push:
    name: push
    runs-on: ubuntu-latest
    needs: check
    if: ${{ github.event_name != 'pull_request' }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: "0"

      # https://github.com/actions/checkout/issues/13
      - name: Push to Production
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git push origin main:production

  update:
    name: update
    runs-on: ubuntu-latest
    if: ${{ contains(github.event.head_commit.message, 'Merge pull request') }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: "0"

      # https://github.com/actions/checkout/issues/13
      - name: Push to Production
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git push origin main:production