style: consistent code formatting

- Format Python code using black
- Format html, css, js files using prettier
- Add CI jobs to enforce consistent code formatting

Signed-off-by: Michael Adler <[email protected]>

.github/workflows/build.yml

@@ -28,16 +28,25 @@ jobs:
 
       - name: install dependencies
         run: |
-          sudo apt-get update && sudo apt-get install -y python3-gi flake8 pylint python3-pydbus
+          sudo apt-get update && sudo apt-get install -y python3-gi flake8 pylint python3-pydbus black
           pip3 install --break-system-packages fsfe-reuse
           git clean -f -d
 
       - name: execute linters
         run: |
           reuse lint
-          flake8
+          flake8 --max-line-length=88
           pylint linux-entra-sso.py
 
+      - name: check Python code formatting
+        run: black --diff --check .
+
+      - name: run prettier
+        uses: creyD/[email protected]
+        with:
+          dry: true
+          prettier_options: '--check **/*.{js,html,css}'
+
   build-xpi:
     runs-on: ubuntu-latest
     permissions:

.prettierrc

@@ -0,0 +1,3 @@
+{
+    "tabWidth": 4
+}

.prettierrc.license

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: MPL-2.0
+# SPDX-FileCopyrightText: Copyright (c) Siemens AG, 2024