From 72e7c600f345f96923e64cc4ef47bc6d91b8c9fb Mon Sep 17 00:00:00 2001
From: Marius Gedminas <marius@gedmin.as>
Date: Tue, 19 May 2020 19:24:22 +0300
Subject: [PATCH 1/2] Add a 'tox -e flake8'

---
 setup.cfg | 17 +++++++++++++++++
 tox.ini   |  5 +++++
 2 files changed, 22 insertions(+)

diff --git a/setup.cfg b/setup.cfg
index 562ebf2d..5775e97f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -13,3 +13,20 @@ python = python
 
 [bdist_wheel]
 universal = 0
+
+[flake8]
+builtins = _
+max-line-length = 80
+extend-ignore =
+# https://pep8.readthedocs.org/en/latest/intro.html#error-codes
+# these are ignored by default:
+# E121: continuation line under-indented for hanging indent
+# E123: closing bracket does not match indentation of opening bracket’s line
+# E126: continuation line over-indented for hanging indent
+# E133: closing bracket does not match visual indentation
+# E226: missing whitespace around arithmetic operator
+# E241: multiple spaces after ‘,’
+# E242: tab after ‘,’
+# E704: multiple statements on one line (def)
+# W503: line break before binary operator
+# W504: line break after binary operator
diff --git a/tox.ini b/tox.ini
index f3d9846c..3e8d622d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -31,3 +31,8 @@ deps =
     pyxdg
     dnspython
     {[base]deps}
+
+[testenv:flake8]
+deps = flake8
+skip_install = true
+commands = flake8 setup.py linkcheck {posargs}

From 7a43abe6d6b17b69e20540b4d01289590c1dcec4 Mon Sep 17 00:00:00 2001
From: Marius Gedminas <marius@gedmin.as>
Date: Tue, 19 May 2020 19:26:33 +0300
Subject: [PATCH 2/2] Add a flake8 job to the Travis matrix

https://docs.travis-ci.com/user/build-matrix/#rows-that-are-allowed-to-fail
suggests that this might not work.
---
 .travis.yml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 075beddb..5784a31b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,13 @@ jobs:
   include:
     - python: "3.5"
       env: TOXENV=oldbs4
+    - name: flake8
+      env: TOXENV=flake8
+      before_script:
+      after_success:
+  allow_failures:
+    - name: flake8
+      env: TOXENV=flake8
 # command to install dependencies
 addons:
   apt: