Install virtualenv if it isn't present

Signed-off-by: Zack Cerza <zack@cerza.org>

diff --git a/bootstrap b/bootstrap
index b880fac923e86e05a0f72729bb79ebd401c495f8..5b5a6116be52409592d4641945647f17aacd07be 100755 (executable)
--- a/bootstrap
+++ b/bootstrap
@@ -56,6 +56,9 @@ Darwin)
 esac
 
 if [ -z "$NO_CLOBBER" ] || [ ! -e ./virtualenv ]; then
+    if ! which virtualenv > /dev/null; then
+        pip install virtualenv
+    fi
     # site packages needed because libvirt python bindings are not nicely
     # packaged
     virtualenv --system-site-packages --setuptools virtualenv