From 4309d4723960305a3080ac239328a28d51fe18b4 Mon Sep 17 00:00:00 2001
From: Josh Warner <SilverTrumpet999@gmail.com>
Date: Thu, 13 Aug 2015 17:39:25 -0500
Subject: [PATCH] FIX: Require networkx 1.9.1 for the 2.6 build

---
 tools/travis_before_install.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/travis_before_install.sh b/tools/travis_before_install.sh
index b146125e..fce0a367 100755
--- a/tools/travis_before_install.sh
+++ b/tools/travis_before_install.sh
@@ -32,6 +32,11 @@ retry () {
 # add build dependencies
 echo "cython>=0.21" >> requirements.txt
 
+# require networkx 1.9.1 on 2.6, as 2.6 support was dropped in 1.10
+if [[ $TRAVIS_PYTHON_VERSION == 2.6* ]]; then
+    sed -i 's/networkx.*/networkx==1.9.1/g' requirements.txt
+fi
+
 # test minimum requirements on 2.7
 if [[ $TRAVIS_PYTHON_VERSION == 2.7* ]]; then
     sed -i 's/>=/==/g' requirements.txt