force isort < 5.0 until available in gentoo

.travis.yml

@@ -6,7 +6,7 @@ python:
 install:
     - sudo apt-get update -q
     - sudo apt-get install intltool desktop-file-utils
-    - pip3 install pytest-cov minimock pycodestyle isort requests pytest pytest-httpserver
+    - "pip3 install pytest-cov minimock pycodestyle 'isort<5.0' requests pytest pytest-httpserver"
     - python3 tools/localdepends.py
 script:
     - make lint

makefile

@@ -64,10 +64,11 @@ unittest:
 	LC_ALL=C PYTHONPATH=src/ pytest --ignore=tests --ignore=src/gpodder/utilwin32ctypes.py --doctest-modules src/gpodder/util.py src/gpodder/jsonconfig.py
 	LC_ALL=C PYTHONPATH=src/ pytest tests --ignore=src/gpodder/utilwin32ctypes.py --ignore=src/mygpoclient --cov=gpodder
 
-ISORTOPTS := -c share src/gpodder tools bin/* *.py
+# ISORTOPTS := -c share src/gpodder tools bin/* *.py # for isort >= 5.0
+ISORTOPTS := -rc -c share src/gpodder tools bin/* *.py
 lint:
 	pycodestyle share src/gpodder tools bin/* *.py
-	isort -q $(ISORTOPTS) || isort --df $(ISORTOPTS)
+	isort -q $(ISORTOPTS) || isort -df $(ISORTOPTS)
 
 
 release: distclean

setup.cfg

@@ -5,5 +5,5 @@ select = W1, W2, W3, E11, E121, E122, E123, E124, E125, E127, E129, E13, E2, E3,
 max-line-length = 142
 
 [isort]
-known_third_party=dbus,gi,mutagen,cairo,requests,github3,jinja2,magic,youtube_dl,podcastparser,mygpoclient
+known_third_party=cairo,comtypes,dbus,gi,github3,jinja2,kaa,magic,mutagen,mygpoclient,podcastparser,requests,youtube_dl
 known_first_party=gpodder,soco