From f7dc96c41505bf2998b1dd7e3e49829a52831153 Mon Sep 17 00:00:00 2001
From: philopon <philopon.dependence@gmail.com>
Date: Tue, 9 Jun 2015 16:23:53 +0900
Subject: [PATCH] multi-ghc-travis

---
 .travis.yml | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 5c7e760..f40b52d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,12 @@
 language: haskell
-ghc:
-  - 7.8
-  - 7.6
+
+env:
+  - CABALVER=1.18 GHCVER=7.6.3
+  - CABALVER=1.18 GHCVER=7.8.4
+  - CABALVER=1.22 GHCVER=7.10.1
+
+before_install:
+ - travis_retry sudo add-apt-repository -y ppa:hvr/ghc
+ - travis_retry sudo apt-get update
+ - travis_retry sudo apt-get install cabal-install-$CABALVER ghc-$GHCVER
+ - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH