install updated pypy from ppa

Author: dangra

.travis-install.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -e
+set -x
+
+if [[ "${TOX_ENV}" == "pypy" ]]; then
+    sudo add-apt-repository -y ppa:pypy/ppa
+    sudo apt-get -qy update
+    sudo apt-get install -y pypy
+    # This is required because we need to get rid of the Travis installed PyPy
+    # or it'll take precedence over the PPA installed one.
+    sudo rm -rf /usr/local/pypy/bin
+fi
+
+pip install tox coveralls

.travis.yml

@@ -11,7 +11,7 @@ matrix:
         - env: TOX_ENV=pypy
 
 install:
-    - pip install -M tox
+    - ./.travis-install.sh
 
 script:
     - tox -e $TOX_ENV