nixpkgs/pkgs/servers/search/elasticsearch/es-home-2.x.patch

diff -rupN a/bin/elasticsearch b/bin/elasticsearch
--- a/bin/elasticsearch	2015-11-18 21:48:18.000000000 +0100
+++ b/bin/elasticsearch	2015-12-04 00:52:21.032475098 +0100
@@ -72,7 +72,11 @@ while [ -h "$SCRIPT" ] ; do
 done
 
 # determine elasticsearch home
-ES_HOME=`dirname "$SCRIPT"`/..
+
+if [ -z "$ES_HOME" ]; then
+    echo "You must set the ES_HOME var" >&2
+    exit 1
+fi
 
 # make ELASTICSEARCH_HOME absolute
 ES_HOME=`cd "$ES_HOME"; pwd`
diff -rupN a/bin/plugin b/bin/plugin
--- a/bin/plugin	2015-11-18 21:48:18.000000000 +0100
+++ b/bin/plugin	2015-12-04 00:52:55.947453619 +0100
@@ -17,7 +17,10 @@ while [ -h "$SCRIPT" ] ; do
 done
 
 # determine elasticsearch home
-ES_HOME=`dirname "$SCRIPT"`/..
+if [ -z "$ES_HOME" ]; then
+    echo "You must set the ES_HOME var" >&2
+    exit 1
+fi
 
 # make ELASTICSEARCH_HOME absolute
 ES_HOME=`cd "$ES_HOME"; pwd`