link-checker.yaml

name: link-checker

on:
  pull_request:
  workflow_dispatch:
  schedule:
    - cron: '30 0 * * SUN' # Sunday “At 00:30”
jobs:
  link-checker:
    runs-on: ubuntu-latest
    defaults:
      run:
        shell: bash -l {0}
    if: github.repository == 'brian-rose/ClimateLaboratoryBook'
    steps:
      - name: Cancel previous runs
        uses: styfle/cancel-workflow-action@0.12.1
        with:
          access_token: ${{ github.token }}
      - uses: actions/checkout@v4

      - name: Setup Miniforge
        uses: conda-incubator/setup-miniconda@v3
        with:
          miniforge-version: latest
          activate-environment: book-render

      - name: Set cache date
        run: echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV

      - uses: actions/cache@v4
        with:
          path: /usr/share/miniconda3/envs/book-render
          key: linux-64-conda-${{ hashFiles('render-environment.yml') }}-${{ env.DATE }}-${{ env.CACHE_NUMBER }}
        id: cache

      - name: Update environment
        if: steps.cache.outputs.cache-hit != 'true'
        run: conda env update -n book-render -f render-environment.yml

      - name: Check external links
        run: |
          jupyter-book build --builder linkcheck .