Travis config file based on Multi GHC configuration

Author: trskop

.travis.yml

@@ -1,13 +1,46 @@
-language: haskell
+# Based on https://github.com/hvr/multi-ghc-travis
 
-ghc:
-  # Older than GHC 7.6 aren't supported by the package.
-  - 7.8
-  - 7.6
+language: c
+
+# Explicitly request container-based infrastructure.
+sudo: false
+
+matrix:
+  include:
+    - env: CABALVER=1.16 GHCVER=7.6.2
+      addons:
+        apt: {packages: [cabal-install-1.16, ghc-7.6.3],  sources: [hvr-ghc]}
+
+    - env: CABALVER=1.18 GHCVER=7.8.4
+      addons:
+        apt: {packages: [cabal-install-1.18, ghc-7.8.4],  sources: [hvr-ghc]}
+    - env: CABALVER=1.22 GHCVER=7.10.3
+      addons:
+        apt: {packages: [cabal-install-1.22, ghc-7.10.3], sources: [hvr-ghc]}
+    - env: CABALVER=1.24 GHCVER=8.0.1
+      addons:
+        apt: {packages: [cabal-install-1.24, ghc-8.0.1],  sources: [hvr-ghc]}
+    - env: CABALVER=head GHCVER=head
+      addons:
+        apt: {packages: [cabal-install-head, ghc-head],   sources: [hvr-ghc]}
+
+  allow_failures:
+    - env: CABALVER=head GHCVER=head
+
+before_install:
+  - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH
+
+install:
+  - cabal --version
+  - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
+  - travis_retry cabal update
+  - cabal install --only-dependencies --enable-tests --enable-benchmarks
 
 script:
   # Option -fpedantic turns on additional wornings in addition to -Wall.
-  - cabal configure -fpedantic && cabal build
+  - cabal configure -fpedantic
+  - cabal build
+  - cabal test
 
   # Following line tests if sdist package is created correctly.
-  - cabal sdist && cabal install dist/*.tar.gz
+  - cabal sdist | sed -rn '$s/^[^:]+:\s+//p' | xargs cabal install