misc: add coverage badge

.github/workflows/python-package.yml

@@ -0,0 +1,78 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: build
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - "src/pytregex/**"
+      - "tests/**"
+      - ".github/workflows/python-package.yml"
+  pull_request:
+    paths:
+      - "src/pytregex/**"
+      - "tests/**"
+      - ".github/workflows/python-package.yml"
+  schedule:
+    - cron: '0 10 * * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        os: [ubuntu-latest, macos-latest, macos-13, windows-latest]
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        # This is necessary to get the PR head instead of base
+        ref: ${{ github.event.pull_request.head.sha }}
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies on macOS and Linux
+      if: matrix.os != 'windows-latest'
+      run: |
+        python -m pip install --upgrade pip
+        if [ -f requirements-dev.txt ]; then pip install -r requirements-dev.txt; fi
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+      shell: bash
+    - name: Install dependencies on Windows
+      if: matrix.os == 'windows-latest'
+      run: |
+        python -m pip install --upgrade pip
+        if (Test-Path -Path '.\requirements-dev.txt' -PathType Leaf) {pip install --upgrade -r requirements-dev.txt}
+        if (Test-Path -Path '.\requirements.txt' -PathType Leaf) {pip install --upgrade -r requirements.txt}
+      shell: pwsh
+    - name: Build dist and test with unittest on macOS and Linux
+      if: matrix.os != 'windows-latest'
+      run: |
+        python -m build
+        pip install dist/*.whl
+        python -m unittest
+    - name: Build dist and test with unittest on Windows
+      if: matrix.os == 'windows-latest'
+      run: |
+        python -m build
+        pip install (Get-ChildItem dist/*.whl)
+        python -m unittest
+      shell: pwsh
+    - name: Generate coverage report
+      run: |
+        coverage run --source pytregex --parallel-mode -m unittest
+        coverage combine
+        coverage xml -i
+    - name: Upload coverage reports to Codecov
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        files: coverage.xml

README.md

@@ -1,3 +1,4 @@
+[![coverage](https://img.shields.io/codecov/c/github/tanloong/pytregex)](https://codecov.io/gh/tanloong/pytregex)
 ![Python Version from PEP 621 TOML](https://img.shields.io/python/required-version-toml?tomlFilePath=https://raw.githubusercontent.com/tanloong/pytregex/refs/heads/master/pyproject.toml)
 [![license](https://img.shields.io/github/license/tanloong/pytregex)](https://github.com/tanloong/pytregex/blob/master/LICENSE)
 

requirements-dev.txt

@@ -2,6 +2,7 @@
 setuptools
 wheel
 twine
+build
 
 # Lint & Coverage
 black