name: "Build and deploy documentation"

on:
  workflow_dispatch:
  push:
    branches:
      - main
    paths:
      # build the manuals only when docs directory is updated
      - docs/**
      - modules/**

# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
permissions:
  contents: write
  pages: write
  id-token: write

# Allow one concurrent deployment
concurrency:
  group: "pages"
  cancel-in-progress: true

jobs:
  check_date:
    runs-on: ubuntu-latest
    name: Check latest commit
    outputs:
      should_run: ${{ steps.should_run.outputs.should_run }}
    steps:
      - uses: actions/checkout@v4.1.7
      - name: print latest_commit
        run: echo ${{ github.sha }}

      - id: should_run
        continue-on-error: true
        name: check latest commit is less than a day
        if: ${{ github.event_name == 'schedule' }}
        run: test -z $(git rev-list --after="24 hours" ${{ github.sha }}) && echo "::set-output name=should_run::false"

  publish:
    needs: check_date
    if: ${{ needs.check_date.outputs.should_run != 'false' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4.1.7
      - uses: DeterminateSystems/nix-installer-action@main
      - uses: DeterminateSystems/magic-nix-cache-action@main
      - run: |
          nix build .#docs
          cp -r result/share/doc/nvf public
      - uses: peaceiris/actions-gh-pages@v4
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./public