scala: add expression for scala 2.10.x branch.

pkgs/development/compilers/scala/2.9.nix

@@ -0,0 +1,34 @@
+{ stdenv, fetchurl }:
+
+# at runtime, need jre or jdk
+
+stdenv.mkDerivation rec {
+  name = "scala-2.9.2";
+
+  src = fetchurl {
+    url = "http://www.scala-lang.org/downloads/distrib/files/${name}.tgz";
+    sha256 = "0s1shpzw2hyz7bwxdqq19rcrzbpq4d7b0kvdvjvhy7h05x496b46";
+  };
+
+  installPhase = ''
+    mkdir -p $out
+    rm bin/*.bat
+    rm lib/scalacheck.jar
+    mv * $out
+  '';
+
+  meta = {
+    description = "Scala is a general purpose programming language";
+    longDescription = ''
+      Scala is a general purpose programming language designed to express
+      common programming patterns in a concise, elegant, and type-safe way.
+      It smoothly integrates features of object-oriented and functional
+      languages, enabling Java and other programmers to be more productive.
+      Code sizes are typically reduced by a factor of two to three when
+      compared to an equivalent Java application.
+    '';
+    homepage = http://www.scala-lang.org/;
+    license = "BSD";
+    platforms = stdenv.lib.platforms.all;
+  };
+}

pkgs/development/compilers/scala/default.nix

@@ -1,20 +1,23 @@
-{ stdenv, fetchurl }:
-
-# at runtime, need jre or jdk
+{ stdenv, fetchurl, makeWrapper, jre }:
 
 stdenv.mkDerivation rec {
-  name = "scala-2.9.2";
+  name = "scala-2.10.3";
 
   src = fetchurl {
-    url = "http://www.scala-lang.org/downloads/distrib/files/${name}.tgz";
-    sha256 = "0s1shpzw2hyz7bwxdqq19rcrzbpq4d7b0kvdvjvhy7h05x496b46";
+    url = "http://www.scala-lang.org/files/archive/${name}.tgz";
+    sha256 = "16ac935wydrxrvijv4ldnz4vl2xk8yb3yzb9bsi3nb9sic7fxl95";
   };
 
+  buildInputs = [ jre makeWrapper ] ;
+
   installPhase = ''
     mkdir -p $out
     rm bin/*.bat
-    rm lib/scalacheck.jar
     mv * $out
+
+    for p in $(ls $out/bin/) ; do
+      wrapProgram $out/bin/$p --prefix PATH ":" ${jre}/bin ;
+    done
   '';
 
   meta = {

pkgs/top-level/all-packages.nix

@@ -3007,7 +3007,9 @@ let
     inherit makeWrapper clisp;
   };
 
-  scala = callPackage ../development/compilers/scala { };
+  scala_2_9 = callPackage ../development/compilers/scala/2.9.nix { };
+  scala_2_10 = callPackage ../development/compilers/scala { };
+  scala = scala_2_10;
 
   sdcc = callPackage ../development/compilers/sdcc {
     boost = boost149; # sdcc 3.2.0 fails to build with boost 1.53