deploy.yml

name: Build and Deploy

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - "*"

# First, grab pyodide-lock.json from the latest release in https://github.com/pyodide/pyodide-recipes,
# whichever it is. Store the Pyodide SymPy version in a variable.
# Similarly, grab the latest version of SymPy from PyPI and store it in a variable.
# If the SymPy version in Pyodide is older than the one that's available in PyPI,
# then we download the PyPI wheel and make it available to the next step.
jobs:
  determine-sympy-version:
    runs-on:
      ubuntu-latest
    steps:
      - name: Grab pyodide-lock.json from latest pyodide-recipes release
        run: |
          gh release download \
          --repo pyodide/pyodide-recipes \
          --pattern "pyodide-lock.json" \
          --dir .

      - name: Get Pyodide and PyPI SymPy versions
        run: |
          PYODIDE_SYMPY_VERSION=$(jq -r '.packages.sympy.version' pyodide-lock.json)" >> $GITHUB_ENV
          PYPI_SYMPY_VERSION=$(curl -s https://pypi.org/pypi/sympy/json | jq -r '.info.version' | grep -Ev 'alpha|a|beta|b|preview|pre|c|rc|dev') >> $GITHUB_ENV

      - name: Install packaging
        run: python -m pip install packaging

      - name: Compare versions and download SymPy, if necessary
        id: sympy-version-check
        shell: python
        run: |
          import os
          from packaging.version import Version

          PYPI_SYMPY_VERSION = os.environ["PYPI_SYMPY_VERSION"]
          PYODIDE_SYMPY_VERSION = os.environ["PYODIDE_SYMPY_VERSION"]

          SHOULD_DOWNLOAD = Version(PYPI_SYMPY_VERSION) > Version(PYODIDE_SYMPY_VERSION)

          if SHOULD_DOWNLOAD:
            print("Downloading the latest version of SymPy from PyPI using the JSON API, excluding release candidates and pre-releases.")
            import urllib.request
            import json

            url = "https://pypi.org/pypi/sympy/json"
            response = urllib.request.urlopen(url)
            data = json.loads(response.read())

            urllib.request.urlretrieve(download_url, f"sympy-{PYPI_SYMPY_VERSION}-py3-none-any.whl")
          else:
            print("The SymPy version in Pyodide is up-to-date with the latest version in PyPI, no need to download.")

          with open(os.environ["GITHUB_OUTPUT"], "a", encoding="utf-8") as f:
            f.write(f"should_download: {SHOULD_DOWNLOAD}\n")

      - name: Upload the wheel, if downloaded
        if: steps.sympy-version-check.outputs.should_download == 'True'
        uses: actions/upload-artifact@v4
        with:
          name: sympy-wheel-${{ github.run_id }}
          path: sympy-*-py3-none-any.whl
          if-no-files-found: error

  build-jupyterlite:
    runs-on: ubuntu-latest
    needs: [determine-sympy-version]
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Download the wheel, if necessary
        if: needs.determine-sympy-version.outputs.should_download == 'True'
        uses: actions/download-artifact@v4
        with:
          name: sympy-wheel-${{ github.run_id }}
          path: custom_wheels
          merge-multiple: true

      - name: Install the dependencies
        run: |
          python -m pip install -r requirements.txt

      - name: Build the JupyterLite site
        run: |
          jupyter lite build

      - name: Add custom index.html (live.sympy.org landing page) and static/ files
        run: |
          ./generateindex.py

      - name: Add CNAME file containing live.sympy.org
        run: |
          echo "live.sympy.org" > ./_output/CNAME

      - name: Upload (dist)
        uses: actions/upload-artifact@v4
        with:
          name: jupyterlite-demo-dist-${{ github.run_number }}
          path: ./_output
          if-no-files-found: error

  deploy:
    if: github.ref == 'refs/heads/main'
    needs: [build-jupyterlite]
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2.3.1
      - uses: actions/download-artifact@v4
        with:
          name: jupyterlite-demo-dist-${{ github.run_number }}
          path: ./dist
          merge-multiple: true

      - name: Deploy
        uses: JamesIves/github-pages-deploy-action@4.1.3
        with:
          branch: gh-pages
          folder: dist