Add flake8 format checking

.flake8

@@ -0,0 +1,20 @@
+[flake8]
+ignore =
+    # H301: one import per line
+    H301,
+    # H306: imports not in alphabetical order (time, os)
+    H306,
+    # E226: missing whitespace around arithmetic operator
+    E226,
+    # E261 at least two spaces before inline comment
+    E261,
+    # W504 line break after binary operator
+    W504,
+    # E203 whitespace before ':'
+    E203,
+    # E221 multiple spaces before operator
+    E221
+
+max-line-length = 127
+
+exclude = .git,__pycache__,conf.py,old,build,dist

.github/workflows/test.yml

@@ -29,6 +29,10 @@ jobs:
       - name: Check image formats
         run: |
           find ./images/ -exec file {} + | grep RIFF -vzq
+      - name: Check python flake8 formating
+        run : |
+          set -eux -o pipefail
+          flake8 .
       - name: Test build
         run: |
           ./update.py --parallel 4 --verbose --destdir=/tmp/web

Sphinxsetup.sh

@@ -66,6 +66,9 @@ python3 -m pip install --user --upgrade git+https://github.com/ArduPilot/sphinxc
 # and a parser to use getting posts from Discourse (forum) and insert in FrontEnd
 python3 -m pip install --user --upgrade beautifulsoup4
 
+# Install flake8
+python3 -m pip install --user --upgrade flake8==3.7.9
+
 # Reset the value of DISPLAY
 if grep -qi -E '(Microsoft|WSL)' /proc/version; then
   echo "Returning DISPLAY to the previous value in WSL"