Test with several GHC versions on Travis CI.

Author: svenpanne

.travis.yml

@@ -1,21 +1,34 @@
-language: haskell
+env:
+ - GHCVER=7.0.4
+ - GHCVER=7.2.2
+ - GHCVER=7.4.2
+ - GHCVER=7.6.3
+ - GHCVER=head
+
 before_install:
-  - sudo apt-get update -qq
-  - sudo apt-get install -qq haskell-platform-doc
-  - ghc-pkg list
-  - pushd ..
-  - git clone --depth=100 --quiet https://github.com/haskell-opengl/OpenGLRaw.git
-  - cd OpenGLRaw
-  - git checkout
-  - cabal install --enable-documentation
-  - popd
-  - ghc-pkg list
-  - pushd ..
-  - git clone --depth=100 --quiet https://github.com/haskell-opengl/GLURaw.git
-  - cd GLURaw
-  - git checkout
-  - cabal install --enable-documentation
-  - popd
-  - ghc-pkg list
+ - sudo add-apt-repository -y ppa:hvr/ghc
+ - sudo apt-get update -qq
+ - sudo apt-get install -qq cabal-install-1.18 ghc-$GHCVER
+ - export PATH="/opt/ghc/$GHCVER/bin:$PATH"
+
+install:
+ - cabal-1.18 update
+ - ghc --version
+ - ghc-pkg list
+ - pushd ..
+ - git clone --depth=100 --quiet https://github.com/haskell-opengl/OpenGLRaw.git
+ - cd OpenGLRaw
+ - cabal-1.18 install --enable-documentation
+ - popd
+ - ghc-pkg list
+ - pushd ..
+ - git clone --depth=100 --quiet https://github.com/haskell-opengl/GLURaw.git
+ - cd OpenGLRaw
+ - cabal-1.18 install --enable-documentation
+ - popd
+ - ghc-pkg list
+
 script:
-  - cabal install --enable-documentation
+ - cabal-1.18 install --enable-documentation
+ - cabal-1.18 sdist
+ - ghc-pkg list