From 622144fa75933e02f7bb0c1d86cb740d00501d8c Mon Sep 17 00:00:00 2001
From: Jonathan Kamens <jik@quantopian.com>
Date: Thu, 23 Jul 2015 15:58:08 -0400
Subject: [PATCH] BLD: Add "--exists-action w" to pip invocations

---
 etc/ordered_pip.sh | 2 +-
 vagrant_init.sh    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/etc/ordered_pip.sh b/etc/ordered_pip.sh
index f7f9bc7c..7d6f81cf 100755
--- a/etc/ordered_pip.sh
+++ b/etc/ordered_pip.sh
@@ -5,7 +5,7 @@ while read line
 do     
     if [[ -n "$line" && "$line" != \#* ]] ; then
         # forward to pip any args after the reqs filename
-        pip install $line "${@:2}"
+        pip install --exists-action w $line "${@:2}"
         ((a = a + 1))
     fi
 done < $1
diff --git a/vagrant_init.sh b/vagrant_init.sh
index b345e1bd..e92983b2 100644
--- a/vagrant_init.sh
+++ b/vagrant_init.sh
@@ -46,5 +46,5 @@ echo "Installing python package dependencies..."
 echo "Installing scipy..."
 pip install scipy==0.12.0 2>&1 >> "$VAGRANT_LOG"
 echo "Installing zipline dev python dependencies..."
-pip install -r /vagrant/etc/requirements_dev.txt 2>&1 >> "$VAGRANT_LOG"
+pip install --exists-action w -r /vagrant/etc/requirements_dev.txt 2>&1 >> "$VAGRANT_LOG"
 echo "Finished!"