Run 'flake8' and 'yapf' for both Python2 and 3

Signed-off-by: Vasilis Tsiligiannis <acinonyx@openwrt.gr>

.gitlab-ci.yml

@@ -21,7 +21,14 @@ static_python:
   before_script:
     - pip install tox~=3.8.0
   script:
-    - tox -e flake8
+    - tox -e "py2-{flake8,yapf}"
+static_python3:
+  stage: static
+  image: python:3.6
+  before_script:
+    - pip install tox~=3.8.0
+  script:
+    - tox -e "py3-{flake8,yapf}"
 docs:
   stage: build
   image: python:2.7

tox.ini

@@ -1,10 +1,5 @@
 [tox]
-envlist =
-    flake8
-    yapf
-    pytest
-    py27
-    py36
+envlist = {py2,py3}-{flake8,yapf},pytest,py2,py3
 
 [testenv:flake8]
 deps =
@@ -15,7 +10,16 @@ commands = flake8 \
     db \
     auth0login
 
-[testenv:yapf]
+[testenv:py2-yapf]
+deps =
+    yapf
+skip_install = True
+commands = yapf -d -r \
+    setup.py \
+    db \
+    auth0login
+
+[testenv:py3-yapf]
 deps =
     yapf
 skip_install = True