Add build workflow

.github/workflows/build.yml

@@ -0,0 +1,71 @@
+name: Main workflow
+
+on:
+  pull_request:
+  push:
+  schedule:
+    - cron: '5 14 * * *'
+
+jobs:
+  check-version-numbers:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Check version numbers
+        run: ./version.sh
+
+  package-python:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+
+    runs-on: ${{ matrix.os }}
+
+    steps:      
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Upgrade pip and build
+        run: |
+          python3 -m pip install --upgrade pip
+          python3 -m pip install --upgrade build
+
+      - name: Build wheel
+        run: python3 -m build
+
+      - name: Upload binary wheel
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: ./dist/*.whl
+
+  deploy:
+    needs:
+      - check-version-numbers
+      - package-python
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags')
+
+    steps:
+      - name: Download distributions
+        uses: actions/download-artifact@v4
+
+      # - name: Deploy test distribution to Test PyPI
+      #   uses: pypa/gh-action-pypi-publish@release/v1
+      #   with:
+      #     password: ${{ secrets.TEST_PYPI_API_TOKEN }}
+      #     verbose: true
+      #     repository_url: https://test.pypi.org/legacy/
+      #     skip_existing: true            
+
+      - name: Deploy tagged release on PyPI
+        if: startsWith(github.ref, 'refs/tags')
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          password: ${{ secrets.PYPI_API_TOKEN }}
+          verbose: true

version.sh

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+#!/bin/sh
+
+PYTHON_VERSION=$(grep -e '^version =' pyproject.toml | cut -d'=' -f2 | tr -d ' "')
+
+PYTHON_VERSION2=$(grep -e 'version=' setup.py | cut -d'=' -f2 | tr -d "',")
+
+[ "$PYTHON_VERSION" = "$PYTHON_VERSION2" ] && echo "$PYTHON_VERSION" && exit 0
+
+echo "Version numbers don't match!"
+echo "  Python is '$PYTHON_VERSION' in pyproject.toml"
+echo "  Python is '$PYTHON_VERSION2' in setup.py"
+exit 1