8000 ci: Add a build for wasm · matplotlib/matplotlib@83191d5 · GitHub
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ci: Add a build for wasm
This adds a `pyproject.toml` config for it, so you can replicate locally with cibuildwheel.
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‎.github/workflows/wasm.yml

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---
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name: Build wasm wheels
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on:
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# Save CI by only running this on release branches or tags.
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push:
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branches:
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- main
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- v[0-9]+.[0-9]+.x
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tags:
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- v*
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# Also allow running this action on PRs if requested by applying the
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# "Run cibuildwheel" label.
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pull_request:
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types:
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- opened
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- synchronize
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- reopened
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- labeled
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permissions:
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contents: read
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jobs:
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build_wasm:
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if: >-
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github.event_name == 'push' ||
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github.event_name == 'pull_request' && (
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(
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github.event.action == 'labeled' &&
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github.event.label.name == 'CI: Run cibuildwheel'
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) ||
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contains(github.event.pull_request.labels.*.name,
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'CI: Run cibuildwheel')
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)
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name: Build wasm
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runs-on: ubuntu-24.04
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steps:
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- uses: actions/checkout@v4
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with:
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fetch-depth: 0
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- uses: actions/setup-python@v5
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name: Install Python
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with:
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python-version: '3.12'
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- name: Build wheels for wasm
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uses: pypa/cibuildwheel@7940a4c0e76eb2030e473a5f864f291f63ee879b # v2.21.3
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env:
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CIBW_PLATFORM: "pyodide"
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- uses: actions/upload-artifact@v4
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with:
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name: cibw-wheels-${{ runner.os }}-${{ matrix.cibw_archs }}
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path: ./wheelhouse/*.whl
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if-no-files-found: error

‎pyproject.toml

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addopts = [
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"--import-mode=importlib",
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]
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# This build is just for testing right now.
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[tool.cibuildwheel.pyodide]
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build-frontend = "build; args: --exports whole_archive"
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test-requires = "pytest"
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test-command = "pytest -p no:cacheprovider --pyargs matplotlib --maxfail=50 -v"
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[tool.cibuildwheel.pyodide.config-settings]
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install-args = "--tags=data,python-runtime,runtime,tests"
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[tool.cibuildwheel.pyodide.environment]
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# Exceptions are needed for pybind11:
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# https://github.com/pybind/pybind11/pull/5298
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CFLAGS = "-fexceptions"
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CXXFLAGS = "-fexceptions"
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LDFLAGS = "-fexceptions"

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