From 393b2e3b19507d5df734be144cb29c59d989650e Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 6 Jan 2014 14:22:33 +0100
Subject: [PATCH] ecj: Add a setup hook that makes Ant use ECJ automatically

---
 pkgs/development/eclipse/ecj/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/eclipse/ecj/default.nix b/pkgs/development/eclipse/ecj/default.nix
index 432bdc72b3c..786fcdba18a 100644
--- a/pkgs/development/eclipse/ecj/default.nix
+++ b/pkgs/development/eclipse/ecj/default.nix
@@ -31,6 +31,12 @@ stdenv.mkDerivation rec {
     mkdir -pv $out/bin
     makeWrapper ${jdk.jre}/bin/java $out/bin/ecj \
       --add-flags "-cp $out/share/java/ecj.jar org.eclipse.jdt.internal.compiler.batch.Main"
+
+    # Add a setup hook that causes Ant to use the ECJ.
+    mkdir -p $out/nix-support
+    cat <<EOF > $out/nix-support/setup-hook
+    export NIX_ANT_ARGS="-Dbuild.compiler=org.eclipse.jdt.core.JDTCompilerAdapter \$NIX_ANT_ARGS"
+    EOF
   '';
 
   meta = {