Use stack for downloading GHC #734

.travis.yml

@@ -1,25 +1,27 @@
 sudo: false
 
-addons:
+language: haskell
-  apt:
-    sources:
-    - hvr-ghc
-    packages:
-    - ghc-7.10.1
-    - cabal-install-1.22
-
-# Note: the distinction between `before_install` and `install` is not important.
-before_install:
- - export PATH=/opt/ghc/7.10.1/bin:/opt/cabal/1.22/bin:$PATH
 
 install:
- - cabal --version
+ # Get stackage-curator
- - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
- - travis_retry cabal update
  - wget https://s3.amazonaws.com/stackage-travis/stackage-curator/stackage-curator.bz2
  - bunzip2 stackage-curator.bz2
  - chmod +x stackage-curator
 
-# Here starts the actual work to be performed for the package under test; any command which exits with a non-zero exit code causes the build to fail.
+ # Get stack
+ - travis_retry curl -L https://github.com/commercialhaskell/stack/releases/download/v0.1.3.0/stack-0.1.3.0-x86_64-linux-gmp4.gz | gunzip > stack
+ - chmod +x stack
+
+ # Install GHC and cabal-install
+ - ./stack setup 7.10
+ - ./stack --resolver nightly-2015-08-12 build cabal-install
+
+ # Update the index
+ - travis_retry ./stack exec cabal update
+
 script:
- - ./stackage-curator check
+ - ./stack --resolver 7.10 exec ./stackage-curator check
+
+cache:
+  directories:
+    - $HOME/.stack