Merge pull request #14 from mbrock/master

Add a Travis configuration for checking that new commits build correctly

.travis.yml

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+language: nix
+script: rm -rf .git && nix-build gf.nix

default.nix

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+{ mkDerivation, alex, array, base, bytestring, Cabal, cgi
+, containers, directory, exceptions, filepath, happy, haskeline
+, HTF, httpd-shed, HUnit, json, lifted-base, mtl, network
+, network-uri, old-locale, parallel, pretty, process, random
+, stdenv, terminfo, time, time-compat, unix, utf8-string
+}:
+mkDerivation {
+  pname = "gf";
+  version = "3.9";
+  src = ./.;
+  isLibrary = true;
+  isExecutable = true;
+  enableSeparateDataOutput = true;
+  libraryHaskellDepends = [
+    array base bytestring cgi containers directory exceptions filepath
+    haskeline httpd-shed json mtl network network-uri old-locale
+    parallel pretty process random terminfo time time-compat unix
+    utf8-string
+  ];
+  libraryToolDepends = [ alex happy ];
+  executableHaskellDepends = [ base containers lifted-base mtl ];
+  testHaskellDepends = [
+    base Cabal directory filepath HTF HUnit process
+  ];
+  doCheck = false;
+  postPatch = ''
+    sed -i "s|\"-s\"|\"\"|" ./Setup.hs
+    sed -i "s|numJobs (bf bi)++||" ./Setup.hs
+  '';
+  preBuild = ''export LD_LIBRARY_PATH=`pwd`/dist/build:$LD_LIBRARY_PATH'';
+  homepage = "http://www.grammaticalframework.org/";
+  description = "Grammatical Framework";
+  license = "unknown";
+}

gf.nix

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+let pkgs = import <nixpkgs> {}; in rec {
+  gf = pkgs.haskellPackages.callPackage ./default.nix {};
+}