Merge branch 'fix/travis'

.travis.yml

@@ -1,17 +1,25 @@
 language: haskell
+sudo: false
 
-env:
- - GHCVER=7.4.2
- - GHCVER=7.6.3
- - GHCVER=7.8.3
- - GHCVER=7.10.1
- - GHCVER=head
+cache:
+  directories:
+    - $HOME/.stack/
 
 before_install:
- - sudo add-apt-repository -y ppa:hvr/ghc
- - sudo apt-get update
- - sudo apt-get install cabal-install-1.18 ghc-$GHCVER
+  - mkdir -p ~/.local/bin
+  - export PATH=~/.local/bin:$PATH
+  - travis_retry curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
+  - chmod a+x ~/.local/bin/stack
 
-matrix:
-  allow_failures:
-    - env: GHCVER=head export PATH=/opt/ghc/$GHCVER/bin:$PATH
+before_install:
+  - mkdir -p ~/.local/bin
+  - export PATH=~/.local/bin:$PATH
+  - travis_retry curl -L https://www.stackage.org/stack/linux-x86_64 | tar -xzO --wildcards '*/stack' > ~/.local/bin/stack
+  - chmod a+x ~/.local/bin/stack
+
+install:
+  - stack -j2 setup --no-terminal
+  - stack -j2 build --only-snapshot --no-terminal
+
+script:
+  - stack -j2 build --no-terminal

stack.yaml

@@ -1,29 +1,9 @@
-# For more information, see: https://github.com/commercialhaskell/stack/blob/master/doc/yaml_configuration.md
-
-# Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
-resolver: lts-3.8
-
-# Local packages, usually specified by relative directory name
+resolver: lts-7.4
 packages:
 - '.'
-
-# Packages to be pulled from upstream that are not in the resolver (e.g., acme-missiles-0.3)
 extra-deps: []
-
-# Override default flag values for local packages and extra-deps
 flags: {}
 
-# Control whether we use the GHC we find on the path
-# system-ghc: true
 
-# Require a specific version of stack, using version ranges
-# require-stack-version: -any # Default
-# require-stack-version: >= 0.1.4.0
 
-# Override the architecture used by stack, especially useful on Windows
-# arch: i386
-# arch: x86_64
 
-# Extra directories used by stack for building
-# extra-include-dirs: [/path/to/dir]
-# extra-lib-dirs: [/path/to/dir]