Automatically build Linux, Mac, and Windows wheels with GitHub Actions

.github/conda-build-environment-macos-latest.yml

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+name: galpywheels
+channels:
+  - conda-forge
+dependencies:
+  - numpy
+  - scipy
+  - matplotlib
+  - setuptools
+  - conda-forge::gsl
+  - conda-forge::compilers
+  - conda-forge::llvm-openmp

.github/conda-build-environment-windows-latest.yml

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+name: galpywheels
+channels:
+  - conda-forge
+dependencies:
+  - numpy
+  - scipy
+  - matplotlib
+  - setuptools
+  - conda-forge::gsl
+  - anaconda::intel-openmp

.github/workflows/actions/entrypoint.sh

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+#!/bin/sh
+
+yum -y install gsl-devel
+
+PYTHON_VERSIONS=("cp35-cp35m" "cp36-cp36m" "cp37-cp37m" "cp38-cp38")
+
+for PYTHON_VERSION in ${PYTHON_VERSIONS[@]}; do
+    /opt/python/${PYTHON_VERSION}/bin/pip install --upgrade pip
+    /opt/python/${PYTHON_VERSION}/bin/pip install -U wheel auditwheel
+    /opt/python/${PYTHON_VERSION}/bin/python setup.py bdist_wheel -d wheelhouse
+done
+
+for whl in /github/workspace/wheelhouse/*.whl; do
+    auditwheel repair $whl
+    rm $whl
+done

.github/workflows/actions/manylinux2014_x86_64/action.yml

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+name: 'build wheels with manylinux2014_x86_64'
+description: 'build wheels with manylinux2014_x86_64'
+runs:
+    using: 'docker'
+    image: docker://quay.io/pypa/manylinux2014_x86_64
+    args:
+        - .github/workflows/actions/entrypoint.sh

.github/workflows/build_macosx_windows_wheels.yml

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+name: Build Mac OS X & Windows wheels and upload to PyPI upon release
+
+# Update on every push and PR to master, and upon release creation
+on:
+  push:
+    branches:    
+      - master
+    paths-ignore:
+      - 'doc/**'
+  pull_request:
+    branches:
+      - master
+    paths-ignore:
+      - 'doc/**'
+  release:
+    types: [created]
+
+jobs:
+  build:
+    name: Build wheels
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-latest,windows-latest]
+        python-version: [3.5,3.6,3.7, 3.8]
+        exclude:
+          - os: windows-latest
+            python-version: 3.5
+    steps:
+      # check-out this repository
+      - uses: actions/checkout@v2
+      # Install Miniconda, as specificed by this repository's environment.yml
+      - uses: goanpeca/setup-miniconda@v1
+        with:
+           activate-environment: galpywheels
+           environment-file: .github/conda-build-environment-${{ matrix.os }}.yml
+           python-version: ${{ matrix.python-version }}
+      - name: Install pip dependencies
+        shell: bash -l {0}
+        run: |
+          python -m pip install --upgrade pip
+          pip install wheel
+      - name: Set environment variables on Mac OS
+        if: matrix.os == 'macos-latest'
+        shell: bash -l {0}
+        run: |
+          echo ::set-env name=CFLAGS::-I$CONDA_PREFIX/include
+          echo ::set-env name=LDFLAGS::-I$CONDA_PREFIX/lib
+          echo ::set-env name=LD_LIBRARY_PATH::-I$CONDA_PREFIX/lib
+      - name: Set environment variables on Windows
+        if: matrix.os == 'windows-latest'
+        shell: bash -l {0}
+        run: |
+          echo ::set-env name=INCLUDE::$CONDA_PREFIX\\Library\\include
+          echo ::set-env name=LIB::$CONDA_PREFIX\\Library\\lib
+          echo ::set-env name=LIBPATH::$CONDA_PREFIX\\Library\\lib
+      - name: Build extension
+        shell: bash -l {0}
+        run: |
+          mkdir wheelhouse
+          python setup.py build_ext
+      - name: Build wheel
+        shell: bash -l {0}
+        run: python setup.py bdist_wheel -d wheelhouse
+      # Upload wheel as artifact
+      - uses: actions/upload-artifact@v2-preview
+        with:
+          name: galpy-wheel-python-${{ matrix.python-version }}-${{ matrix.os }}
+          path: wheelhouse/*.whl
+# We need to run on Ubuntu for pypa/gh-action-pypi-publish action
+# so might as well also combine
+  combine:
+    name: Combine wheels into single artifact and upload to PyPI upon release
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - run: |
+          mkdir tmp_wheelhouse
+          mkdir wheelhouse
+      - uses: actions/download-artifact@v2-preview
+        with:
+          path: tmp_wheelhouse/
+      - run: find tmp_wheelhouse/ -mindepth 2 -type f -exec mv -i '{}' wheelhouse/ ';'
+      - uses: actions/upload-artifact@v2-preview
+        with:
+          name: galpy-wheels-macos-windows-latest
+          path: wheelhouse/*.whl
+      # Upload to PyPI if this is a release
+      - name: Publish distribution to PyPI
+        if: github.event_name == 'release' && github.event.action == 'created'
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          password: ${{ secrets.pypi_token }}
+          packages_dir: wheelhouse/

.github/workflows/build_manylinux_wheels.yml

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+name: Build manylinux wheels, upload to PyPI upon release
+
+# Update on every push or PR to master (except when only docs) and upon releases
+on:
+  push:
+    branches:    
+      - master
+    paths-ignore:
+      - 'doc/**'
+  pull_request:
+    branches:
+      - master
+    paths-ignore:
+      - 'doc/**'
+  release:
+    types: [created]
+
+jobs:
+  build:
+    name: Build manylinux wheels, upload to PyPI upon release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build manylinux2014_x86_64 wheels
+        uses: ./.github/workflows/actions/manylinux2014_x86_64/
+      - uses: actions/upload-artifact@v2-preview
+        with:
+          name: galpy-wheels-manylinux
+          path: wheelhouse/*manylinux*.whl
+      # Upload to PyPI if this is a release
+      - name: Publish distribution to PyPI
+        if: github.event_name == 'release' && github.event.action == 'created'
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          password: ${{ secrets.pypi_token }}
+          packages_dir: wheelhouse/

.github/workflows/build_sdist.yml

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+name: Build source directory for release
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  build:
+    name: Build source directory for release
+    runs-on: ubuntu-latest
+    steps:
+      # check-out this repository
+      - uses: actions/checkout@v2
+      # Setup python
+      - name: Set up Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - name: Build sdist
+        shell: bash -l {0}
+        run: python setup.py sdist
+      # Upload to PyPI if this is a release
+      - name: Publish distribution to PyPI
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          password: ${{ secrets.pypi_token }}