From 30b1c44f913d5d909823d0abd42e705d53e98755 Mon Sep 17 00:00:00 2001
From: Pablo Santiago Blum de Aguiar <scorphus@gmail.com>
Date: Sat, 29 Oct 2016 18:07:03 -0200
Subject: [PATCH] #N/A: Do not fail if formula is already installed

---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index d4e591b9..02d79886 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,7 +29,7 @@ addons:
       - python3-commandnotfound
 before_install:
   - if [[ $TRAVIS_OS_NAME == "osx" ]]; then brew update ; fi
-  - if [[ $TRAVIS_OS_NAME == "osx" ]]; then brew install $FORMULA; fi
+  - if [[ $TRAVIS_OS_NAME == "osx" ]]; then if brew ls --versions $FORMULA; then brew upgrade $FORMULA || echo Python is up to date; else brew install $FORMULA; fi; fi
   - if [[ $TRAVIS_OS_NAME == "osx" ]]; then virtualenv venv -p $FORMULA; fi
   - if [[ $TRAVIS_OS_NAME == "osx" ]]; then source venv/bin/activate; fi
   - pip install -U pip