improve travis coding style checks

.gitignore

@@ -9,5 +9,6 @@ MANIFEST
 .coverage
 .idea/
 __pycache__
+_cffi__*
 netlib.egg-info/
 pathod/

.travis.yml

@@ -9,8 +9,7 @@ install:
 # command to run tests, e.g. python setup.py test
 script:
   - "nosetests --with-cov --cov-report term-missing"
-  - "autopep8 -i -r -a -a . && test -z \"$(git status -s)\""
-  - "autoflake -r -i --remove-all-unused-imports --remove-unused-variables . && test -z \"$(git status -s)\""
+  - "./check_coding_style.sh"
 after_success:
   - coveralls
 notifications:

check_coding_style.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+autopep8 -i -r -a -a .
+if [[ -n "$(git status -s)" ]]; then
+  echo "autopep8 yielded the following changes:"
+  git status -s
+  git --no-pager diff
+  exit 1
+fi
+
+autoflake -i -r --remove-all-unused-imports --remove-unused-variables .
+if [[ -n "$(git status -s)" ]]; then
+  echo "autoflake yielded the following changes:"
+  git status -s
+  git --no-pager diff
+  exit 1
+fi
+
+echo "Coding style seems to be ok."
+exit 0