Build PyArrow and LightGBM

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

.github/workflows/build.yml

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+name: Build PyArrow and LightGBM
+
+on:
+  pull_request:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5.3.0
+        with:
+          python-version: "3.12"
+
+      - name: Install system-level dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+          cmake bzip2 ccache f2c g++ gfortran git make \
+          patch pkg-config swig unzip wget xz-utils \
+          autoconf autotools-dev automake texinfo dejagnu \
+          build-essential libtool libltdl-dev \
+          gnupg2 libdbus-glib-1-2 sudo sqlite3 \
+          ninja-build jq xxd
+
+      - name: Cache ccache outputs
+        uses: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+        with:
+          path: /tmp/ccache
+          key: ccache-${{ hashFiles('Makefile.envs') }}
+
+      - name: Check out @agriyakhetarpal's fork of Pyodide, and the NumPy v2 mirror branch
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          repository: agriyakhetarpal/pyodide
+          ref: numpy-v2-update-mirror
+          path: pyodide_checkout
+          submodules: recursive
+
+      - name: Restore cached built packages
+        uses: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+        with:
+          path: |
+            pyodide_checkout/packages/.libs/*
+            pyodide_checkout/packages/.artifacts/*
+          key: pyodide-packages-${{ hashFiles('pyodide_checkout/packages/recipes/**/*.yaml') }}
+
+      - name: Build Pyodide distribution with NumPy v2 enabled
+        working-directory: pyodide_checkout/
+        run: |
+          source pyodide_env.sh
+          ccache -z
+          PYODIDE_CORES=$(nproc)
+          PYODIDE_JOBS="${PYODIDE_CORES}" PYODIDE_PACKAGES="pyarrow,lightgbm" make
+          ccache -s
+
+      - name: Save ccached outputs
+        uses: actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+        with:
+          path: /tmp/ccache
+          key: ccache-${{ hashFiles('Makefile.envs') }}
+
+      - name: Upload Pyodide distribution with PyArrow and LightGBM wheels
+        uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b # v4.5.0
+        with:
+          name: pyodide-with-packages-pyarrow-lightgbm
+          path: pyodide_checkout/dist/*
+          if-no-files-found: error
+          retention-days: 1
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: [build]
+    if: >-
+      github.repository == 'agriyakhetarpal/pyodide-numpy-2.0-rebuilds' &&
+      github.event_name == 'release' &&
+      github.event.action == 'published'
+    permissions:
+      # Required to sign the attestations
+      id-token: write
+      attestations: write
+      # Required to upload to a GitHub release identifier
+      contents: write
+    steps:
+      - uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
+        with:
+          name: packages-pyarrow-lightgbm-artifact
+          path: dist
+          merge-multiple: true
+
+      - name: Copy PyArrow and LightGBM wheels from Pyodide distribution artifact
+        run: |
+          mkdir -p packages
+          cp dist/packages/pyarrow-*.whl packages/
+          cp dist/packages/lightgbm-*.whl packages/
+
+      - name: Generate attestations for these wheels
+        uses: actions/attest-build-provenance@7668571508540a607bdfd90a87a560489fe372eb # v2.1.0
+        with:
+          subject-path: |
+            packages/*.whl
+
+      - name: Verify them, to ensure that the wheels they were attested correctly
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: bash
+        run: |
+          for artifact in packages/*; do
+              echo "# ${artifact}"
+              gh attestation verify "${artifact}" --repo ${{ github.repository }}
+          done
+
+      - name: Create GitHub release with these wheels
+        uses: softprops/action-gh-release@01570a1f39cb168c169c802c3bceb9e93fb10974 # v2.1.0
+        if: >-
+          github.repository == 'agriyakhetarpal/pyodide-numpy-2.0-rebuilds' &&
+          github.event_name == 'release' &&
+          github.event.action == 'published'
+        with:
+          files: |
+            packages/*.whl
+          fail_on_unmatched_files: true
+          name: PyArrow and LightGBM wheels, built against NumPy v2 via Pyodide gh-4925

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/