Adding flake8 to ci/cd

.flake8

@@ -0,0 +1,4 @@
+[flake8]
+max-line-length = 88
+extend-ignore = E203, E266, E501, W503
+select = B,C,E,F,W,T4,B9

.github/workflows/flake8.yml

@@ -0,0 +1,27 @@
+name: Flake8 Linter
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.10'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install flake8 flake8-unused-arguments
+    - name: Run Flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 ./codeaide --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings
+        flake8 ./codeaide --count --exit-zero --max-complexity=10 --max-line-length=88 --statistics

.pre-commit-config.yaml

@@ -1,6 +1,19 @@
 repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.4.0
+    hooks:
+    - id: trailing-whitespace
+    - id: end-of-file-fixer
+    - id: check-yaml
+    - id: check-added-large-files
+
 -   repo: https://github.com/psf/black
     rev: 23.3.0
     hooks:
     - id: black
-      language_version: python3
+
+-   repo: https://github.com/PyCQA/flake8
+    rev: 6.0.0
+    hooks:
+    - id: flake8
+      additional_dependencies: [flake8-unused-arguments]

requirements.txt

@@ -10,4 +10,6 @@ black
 isort
 pre-commit
 pyqt5
-pygments
+pygments
+flake8
+flake8-unused-arguments