Update Travis

.travis.yml

@@ -10,13 +10,23 @@ install:
   # Set up the Shell to treat the semicolon as &&
   - set -o pipefail && set -e
   # Install GHC and Cabal
-  - travis_retry sudo add-apt-repository -y ppa:hvr/ghc
-  - travis_retry sudo apt-get update
-  - travis_retry sudo apt-get install cabal-install-1.18 ghc-$ghc
-  - export PATH=/opt/ghc/$ghc/bin:/opt/cabal/1.18/bin:$PATH
+  - 
+    travis_retry sudo add-apt-repository -y ppa:hvr/ghc;
+    travis_retry sudo apt-get update;
+    travis_retry sudo apt-get install cabal-install-1.18 ghc-$ghc;
+    export PATH=/opt/ghc/$ghc/bin:/opt/cabal/1.18/bin:$PATH;
+  # Update the Cabal database
   - cabal update
+  # Switch to the distro:
+  - 
+    export pkg_name=$(cabal info . | awk '{print $2;exit}');
+    cabal sdist;
+    cd dist;
+    tar xzvf $pkg_name.tar.gz;
+    cd $pkg_name;
   # Install the lower bound dependencies
-  - if [ $lower_bound_dependencies -eq 1 ];
+  - 
+    if [ $lower_bound_dependencies -eq 1 ];
     then
       cabal install "transformers == 0.2.*";
       cabal install "text == 1.0.*";
@@ -24,18 +34,12 @@ install:
       cabal install "time == 1.4.*";
       cabal install "list-t == 0.2.*";
     fi;
-  # Work around the "haskell-src-exts" implicit dependency:
+  # Install the "haskell-src-exts" implicit dependency
   - cabal install happy
-  # Switch to the distro:
-  - export pkg_name=$(cabal info . | awk '{print $2;exit}');
-    cabal sdist;
-    cd dist;
-    tar xzvf $pkg_name.tar.gz;
-    cd $pkg_name;
-  - cabal install --only-dependencies --enable-tests --enable-benchmarks
-  - cabal configure --enable-tests --enable-benchmarks
-  - cabal build
-
+  # Install the remaining dependencies
+  - cabal install --only-dependencies --enable-tests --enable-benchmarks --avoid-reinstalls
+  # Configure and build
+  - cabal configure --enable-tests --enable-benchmarks && cabal build
 
 script:
   - cabal test --show-details=always