Merge JoinMarket-Org/joinmarket-clientserver#1569: Fix Python lint script

bfd5b2146c fix linting (roshii)

Pull request description:

  - Fixes https://github.com/JoinMarket-Org/joinmarket-clientserver/issues/1568
  - Remove Python 2 check
  - Use script in CI

ACKs for top commit:
  kristapsk:
    ACK bfd5b2146c

Tree-SHA512: aec12cc7aa03ac82979186bd146603462f11742746c8e5f2eb78f424e83740bfc59678fba0a5b2bc7d0f3dde38a1a9d4b6ceabb280a301be423b2c1fdb4a2e41

.github/workflows/unittests.yml

@@ -32,7 +32,7 @@ jobs:
           ./install.sh --develop --with-qt
           ./jmvenv/bin/python -m pip install --upgrade pip
       - name: Lint with flake8
-        run: ./jmvenv/bin/flake8 -v src
+        run: source ./jmvenv/bin/activate && ./test/lint/lint-python.sh
       - name: Cache bitcoind
         uses: actions/cache@v3
         env:

test/lint/lint-python.sh

@@ -2,14 +2,11 @@
 # Based on Bitcoin Core's test/lint/lint-python.sh
 
 # The python files in jmqtui/jmqtui are auto generated.
-EXCLUDE_PATTERNS="jmqtui/jmqtui/*.py"
+EXCLUDE_PATTERNS="src/jmqtui/*.py"
 
 if ! command -v flake8 > /dev/null; then
     echo "Skipping Python linting since flake8 is not installed."
     exit 0
-elif flake8 --version | grep -q "Python 2"; then
-    echo "Skipping Python linting since flake8 is running under Python 2. Install the Python 3 version of flake8."
-    exit 0
 fi
 
 if [[ $# == 0 ]]; then