emscripten.yml

name: Test Emscripten/Pyodide build

on:
  pull_request:
    branches:
      - main
      - maintenance/**
  # Note: this workflow gets triggered on the same schedule as the
  # wheels.yml workflow, with the exception that this workflow runs
  # the test suite for the Pyodide wheel too, prior to uploading it.
  #
  # Run on schedule to upload to Anaconda.org
  schedule:
    #        ┌───────────── minute (0 - 59)
    #        │  ┌───────────── hour (0 - 23)
    #        │  │ ┌───────────── day of the month (1 - 31)
    #        │  │ │ ┌───────────── month (1 - 12 or JAN-DEC)
    #        │  │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
    #        │  │ │ │ │
    - cron: "42 2 * * SUN,WED"
  workflow_dispatch:
    inputs:
      push_wheels:
        # Can be 'true' or 'false'. Default is 'false'.
        # Warning: this will overwrite existing wheels.
        description: >
          Push wheels to Anaconda.org if the build succeeds
        required: false
        default: 'false'

env:
  FORCE_COLOR: 3

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

permissions:
  contents: read # to fetch code (actions/checkout)

jobs:
  build-wasm-emscripten:
    name: Build NumPy distribution for Pyodide
    runs-on: ubuntu-22.04
    # To enable this workflow on a fork, comment out:
    if: github.repository == 'numpy/numpy'
    env:
      PYODIDE_VERSION: 0.25.1
      # PYTHON_VERSION and EMSCRIPTEN_VERSION are determined by PYODIDE_VERSION.
      # The appropriate versions can be found in the Pyodide repodata.json
      # "info" field, or in Makefile.envs:
      # https://github.com/pyodide/pyodide/blob/main/Makefile.envs#L2
      PYTHON_VERSION: 3.11.3
      EMSCRIPTEN_VERSION: 3.1.46
      NODE_VERSION: 18
    steps:
      - name: Checkout NumPy
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
        with:
          submodules: recursive
          # This input shall fetch tags without the need to fetch the
          # entire VCS history, see https://github.com/actions/checkout#usage
          fetch-tags: true

      - name: Set up Python ${{ env.PYTHON_VERSION }}
        id: setup-python
        uses: actions/setup-python@82c7e631bb3cdc910f68e0081d67478d79c6982d # v5.1.0
        with:
          python-version: ${{ env.PYTHON_VERSION }}

      - name: Set up Emscripten toolchain
        uses: mymindstorm/setup-emsdk@6ab9eb1bda2574c4ddb79809fc9247783eaf9021 # v14
        with:
          version: ${{ env.EMSCRIPTEN_VERSION }}
          actions-cache-folder: emsdk-cache

      - name: Install pyodide-build
        run: pip install "pydantic<2" pyodide-build==${{ env.PYODIDE_VERSION }}

      - name: Find installation for pyodide-build
        shell: python
        run: |
          import os
          import pyodide_build
          from pathlib import Path

          pyodide_build_path = Path(pyodide_build.__file__).parent

          env_file = os.getenv('GITHUB_ENV')

          with open(env_file, "a") as myfile:
              myfile.write(f"PYODIDE_BUILD_PATH={pyodide_build_path}\n")

      - name: Build NumPy for Pyodide
        run: |
          pyodide build -Cbuild-dir=build -Csetup-args="--cross-file=$PWD/tools/ci/emscripten/emscripten.meson.cross" -Csetup-args="-Dblas=none" -Csetup-args="-Dlapack=none"

      - name: Set up Node.js
        uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
        with:
          node-version: ${{ env.NODE_VERSION }}

      - name: Set up Pyodide virtual environment
        run: |
          pyodide venv .venv-pyodide
          source .venv-pyodide/bin/activate
          pip install dist/*.whl
          pip install -r requirements/emscripten_test_requirements.txt

      - name: Test NumPy for Pyodide
        run: |
          source .venv-pyodide/bin/activate
          cd ..
          pytest --pyargs numpy -m "not slow"

        # Push to https://anaconda.org/scientific-python-nightly-wheels/numpy
        # WARNING: this job will overwrite any existing WASM wheels.
      - name: Push to Anaconda PyPI index
        if: >-
          (github.repository == 'numpy/numpy') &&
          (github.event_name == 'workflow_dispatch' && github.event.inputs.push_wheels == 'true') ||
          (github.event_name == 'schedule')
        uses: scientific-python/upload-nightly-action@b67d7fcc0396e1128a474d1ab2b48aa94680f9fc # v0.5.0
        with:
          artifacts_path: dist/
          anaconda_nightly_upload_token: ${{ secrets.NUMPY_NIGHTLY_UPLOAD_TOKEN }}