Create pre-commit.yml (#424)

Author: hiworldwzj

.github/workflows/pre-commit.yml

@@ -0,0 +1,38 @@
+name: Pre-commit checks
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.9'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pre-commit
+        pre-commit install-hooks
+
+    - name: Get list of modified files
+      id: files
+      run: |
+        echo "MODIFIED_FILES=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.sha }})" >> $GITHUB_ENV
+
+    - name: Run pre-commit on modified files
+      run: |
+        if [ -n "${{ env.MODIFIED_FILES }}" ]; then
+          pre-commit run --files ${{ env.MODIFIED_FILES }}
+        else
+          echo "No files to check"
+        fi