Run yapf tidy test in Travis

Author: oschwald

.travis-yapf.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+diff=$(yapf -rd maxminddb tests)
+
+if [[ $? != 0 ]]; then
+    echo "yapf failed to run."
+    echo "$diff"
+    exit $?
+elif [[ $diff ]]; then
+    echo "$diff"
+    exit 1
+else
+    exit 0
+fi

.travis.yml

@@ -17,13 +17,15 @@ before_install:
   - sudo make install
   - sudo ldconfig
   - cd ..
-  - pip install pylint coveralls
+  - pip install coveralls
+  - if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then pip install pylint yapf; fi
   - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then pip install unittest2; fi
 
 script:
   - if [[ $TRAVIS_PYTHON_VERSION != 'pypy' ]]; then export MM_FORCE_EXT_TESTS=1; fi
   - CFLAGS="-Werror -Wall -Wextra" python setup.py test
-  - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pylint --rcfile .pylintrc maxminddb/*.py; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then pylint --rcfile .pylintrc maxminddb/*.py; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then ./.travis-yapf.sh; fi
 
 after_success:
   - coveralls

HISTORY.rst

@@ -6,7 +6,6 @@ History
 * Fix issue where incorrect size was used when unpacking some types with the
   pure Python reader. Reported by Lee Symes. GitHub #30.
 
-
 1.3.0 (2017-03-13)
 ++++++++++++++++++