Add flake8 checks and more python versions on Travis/Tox

.travis.yml

@@ -1,20 +1,43 @@
 language: python
-python:
-    - "2.7"
-    - "3.3"
-    - "3.4"
-    - "pypy"
+sudo: false
+
+env:
+    global:
+        # Undocumented feature of nose-show-skipped.
+        NOSE_SHOW_SKIPPED: 1
 
+matrix:
+    include:
+        - python: 2.7
+          env: {TOXENV: py27-test}
+        - python: 3.3
+          env: {TOXENV: py33-cov, COVERAGE: 1}
+        - python: 3.4
+          env: {TOXENV: py34-test}
+        - python: 3.5
+          env: {TOXENV: py35-test}
+        - python: pypy
+          env: {TOXENV: pypy-test}
+        - python: 2.7
+          env: {TOXENV: py27-flake8}
+        - python: 3.3
+          env: {TOXENV: py33-flake8}
+        - python: 2.7
+          env: {TOXENV: docs}
+
+# To install dependencies, tell tox to do everything but actually running the
+# test.
 install:
-    - pip install .
+    - travis_retry piip install tox
+    - travis_retry tox --notest
 
-script: nosetests --with-coverage --cover-package=confuse
+script: tox
 
-# coveralls.io reporting, using https://github.com/coagulant/coveralls-python
-# Only report coverage for one version.
-before_script:
-    - "[[ $TRAVIS_PYTHON_VERSION == '3.3' ]] && pip install coveralls || true"
+# Report coverage to codecov.io.
+before_install:
+    - "[ ! -z $COVERAGE ] && travis_retry pip install codecov || true"
 after_success:
-    - "[[ $TRAVIS_PYTHON_VERSION == '3.3' ]] && coveralls || true"
+    - "[ ! -z $COVERAGE ] && codecov || true"
 
-sudo: false
+cache:
+    pip: true

setup.cfg

@@ -0,0 +1,20 @@
+[nosetests]
+verbosity=1
+logging-clear-handlers=1
+eval-attr="!=slow"
+
+[flake8]
+min-version=2.7
+# Default pyflakes errors we ignore:
+# - E241: missing whitespace after ',' (used to align visually)
+# - E221: multiple spaces before operator (used to align visually)
+# - E731: do not assign a lambda expression, use a def
+# - C901: function/method complexity
+# `flake8-future-import` errors we ignore:
+# - FI50: `__future__` import "division" present
+# - FI51: `__future__` import "absolute_import" present
+# - FI12: `__future__` import "with_statement" missing
+# - FI53: `__future__` import "print_function" present
+# - FI14: `__future__` import "unicode_literals" missing
+# - FI15: `__future__` import "generator_stop" missing
+ignore=C901,E241,E221,E731,FI50,FI51,FI12,FI53,FI14,FI15

tox.ini

@@ -1,13 +1,42 @@
+# Tox (http://tox.testrun.org/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
 [tox]
-envlist = py27, py34, pypy
+envlist = py27-test, py27-flake8, docs
 
-[testenv]
-commands =
-    nosetests
+# The exhaustive list of environments is:
+# envlist = py{27,33,34,35}-{test,cov}, py{27,33}-flake8, docs
+
+[_test]
 deps =
+    coverage
     nose
+    nose-show-skipped
+    pyyaml
+
 
-[testenv:py27]
+[_flake8]
 deps =
-    {[testenv]deps}
-    argparse
+    flake8
+    flake8-future-import
+    pep8-naming
+files = example confuse.py test setup.py docs
+
+[testenv]
+passenv =
+    NOSE_SHOW_SKIPPED # Undocumented feature of nose-show-skipped.
+deps =
+    {test,cov}: {[_test]deps}
+    py{27,33}-flake8: {[_flake8]deps}
+commands =
+    cov: nosetests --with-coverage {posargs}
+    test: nosetests {posargs}
+    py27-flake8: flake8 --min-version 2.7 {posargs} {[_flake8]files}
+    py33-flake8: flake8 --min-version 3.3 {posargs} {[_flake8]files}
+
+[testenv:docs]
+basepython = python2.7
+deps = sphinx
+commands = sphinx-build -W -q -b html docs {envtmpdir}/html {posargs}