This should improve travis build speed

.travis.yml

@@ -1,35 +1,20 @@
 language: python
 
+#New container architecture
+#http://docs.travis-ci.com/user/workers/container-based-infrastructure/
+#sudo: false
+
 python:
   - "3.3"
   - "3.4"
 
 cache:
+  apt: true
   directories:
   - build
 
 before_install:
-  - mkdir -p build
-  - sudo apt-get install -qqm wget build-essential python3-dev
-  - sudo apt-get install -qqm python3-pyqt4 python3-sip-dev
-  # install SIP
-  - cd build
-  - wget --quiet --output-document=sip.tar.gz http://downloads.sourceforge.net/project/pyqt/sip/sip-4.16.6/sip-4.16.5.tar.gz
-  - tar -xf sip.tar.gz
-  - cd sip-4.16.5
-  - python -B configure.py
-  - make
-  - sudo make install
-  # install PyQt
-  - cd $TRAVIS_BUILD_DIR/build
-  - wget --quiet --output-document=pyqt.tar.gz http://downloads.sourceforge.net/project/pyqt/PyQt4/PyQt-4.11.3/PyQt-x11-gpl-4.11.3.tar.gz
-  - tar -xf pyqt.tar.gz
-  - cd PyQt-x11-gpl-4.11.3
-  - python -B configure.py --confirm-license
-  - make
-  - sudo make install
-  - python -c 'import PyQt4'  # Check if it's ok
-  - cd $TRAVIS_BUILD_DIR
+  - sh scripts/prepare_travis.sh
 
 notifications:
   email:

scripts/prepare_travis.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+#
+# Copyright (C) 2015 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+set -e
+
+SIP=4.16.5
+PYQT=4.11.3
+
+echo "Install sip $SIP and PyQT $PYQT"
+
+mkdir -p build
+cd build
+
+# install SIP
+if [ ! -d "sip-${SIP}" ]
+then
+    wget --quiet --output-document=sip.tar.gz "http://downloads.sourceforge.net/project/pyqt/sip/sip-${SIP}/sip-${SIP}.tar.gz"
+    tar -xf sip.tar.gz
+    cd "sip-${SIP}"
+    python -B configure.py
+    make
+    cd ..
+fi
+
+cd "sip-${SIP}"
+sudo make install
+
+# install PyQt
+if [ ! -d "PyQt-x11-gpl-${PYQT}" ]
+then
+    wget --quiet --output-document=pyqt.tar.gz "http://downloads.sourceforge.net/project/pyqt/PyQt4/PyQt-${PYQT}/PyQt-x11-gpl-${PYQT}.tar.gz"
+    tar -xf pyqt.tar.gz
+    cd "PyQt-x11-gpl-${PYQT}"
+    python -B configure.py --confirm-license
+    make
+    cd ..
+fi
+
+cd PyQt-x11-gpl-${PYQT}
+sudo make install
+
+python -c 'import PyQt4'  # Check if it's ok
+