Update CI build process

.gitignore

@@ -5,3 +5,4 @@ build/*
 dist/*
 *.egg-info/*
 *~
+ci-build

.travis.yml

@@ -6,8 +6,4 @@ cache:
     - $HOME/virtualenv/python3.3.5/lib/python3.3/site-packages
 install:
   - "pip install -r dev-requirements.txt"
-script:
-  - "pep8 --ignore E501 i3pystatus tests"
-  - "PYTHONPATH=. py.test"        # run unit tests
-  - "python setup.py -q install"  # test install
-  - "sphinx-build -W docs html"   # test building docs
+script: "./ci-build.sh"

ci-build.sh

@@ -0,0 +1,21 @@
+#!/bin/bash -xe
+
+# Target directory for all build files
+BUILD=${1:-ci-build}
+mkdir -p $BUILD
+
+pep8 --ignore E501 i3pystatus tests
+
+PYTHONPATH=. py.test --junitxml ${BUILD}/testlog.xml tests
+
+# Check that the setup.py script works
+rm -rf ${BUILD}/test-install ${BUILD}/test-install-bin
+mkdir ${BUILD}/test-install ${BUILD}/test-install-bin
+PYTHONPATH=${BUILD}/test-install python setup.py --quiet install --install-lib ${BUILD}/test-install --install-scripts ${BUILD}/test-install-bin
+
+test -f ${BUILD}/test-install-bin/i3pystatus
+
+# Check that the docs build w/o warnings (-W flag)
+sphinx-build -b html -W docs ${BUILD}/docs/
+
+