Enable run for Emscripten/Pyodide wheels

Copied with updates and suggestions received from numpy#24603 on 23/02/2024.

.github/workflows/emscripten.yml

@@ -8,6 +8,9 @@ on:
     branches:
       - main
       - maintenance/**
+# TODO: remove both of these after everything is ready
+  push:
+  workflow_dispatch:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
@@ -19,50 +22,46 @@ permissions:
 jobs:
   build-wasm-emscripten:
     runs-on: ubuntu-22.04
-    if: false  # NOTE: job disabled, it needs to be moved to Meson (see gh-24603)
     # if: "github.repository == 'numpy/numpy'"
     env:
-      PYODIDE_VERSION: 0.23.1
+      PYODIDE_VERSION: 0.25.0
       # 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: 3.11.2
-      EMSCRIPTEN_VERSION: 3.1.32
+      PYTHON_VERSION: 3.111.3
+      EMSCRIPTEN_VERSION: 3.1.46
       NODE_VERSION: 18
     steps:
       - name: Checkout numpy
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           submodules: true
-          # versioneer.py requires the latest tag to be reachable. Here we
-          # fetch the complete history to get access to the tags.
-          # A shallow clone can work when the following issue is resolved:
-          # https://github.com/actions/checkout/issues/338
-          fetch-depth: 0
+          # The fetch-tags input shall fetch tags for versioneer.py without
+          # the need to fetch the entire history, see
+          # https://github.com/actions/checkout#usage
+          fetch-tags: true
 
-      - name: set up python
+      - name: Set up Python ${{ env.PYTHON_VERSION }}
         id: setup-python
         uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
-      - uses: mymindstorm/setup-emsdk@6ab9eb1bda2574c4ddb79809fc9247783eaf9021 # v14
+      - 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==$PYODIDE_VERSION
 
-      - name: Build
+      - name: Build NumPy for Pyodide
         run: |
-          # Pyodide is still in the process of adding better/easier support for
-          # non-setup.py based builds.
-          cp pyproject.toml.setuppy pyproject.toml
-          CFLAGS=-g2 LDFLAGS=-g2 pyodide build
+          pyodide build -Csetup-args="--cross-file=$PWD/tools/ci/emscripten.meson.cross"
 
-      - name: set up node
+      - name: Set up Node.js
         uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
         with:
           node-version: ${{ env.NODE_VERSION }}
@@ -73,11 +72,10 @@ jobs:
           source .venv-pyodide/bin/activate
           pip install dist/*.whl
           python -c "import sys; print(sys.platform)"
-          # TODO: when re-enabled this workflow, install test deps differently
-          # since ninja isn't installable with pyodide
           pip install -r requirements/test_requirements.txt
-      - name: Test
+
+      - name: Test NumPy for Pyodide
         run: |
           source .venv-pyodide/bin/activate
           cd ..
-          python numpy/runtests.py -n -vv
+          pytest --pyargs numpy -m "not slow"