Merged revision(s) 552 from main/trunk:

add release signing

build.xml

@@ -20,6 +20,10 @@
 	<property name="javadoc.link.sun" value="http://docs.oracle.com/javase/1.5.0/docs/api/" />
 	<property name="javadoc.link.lucene" value="http://lucene.apache.org/core/3_6_2/api/core/" />
 
+  <!-- GPG settings -->
+  <property name="gpg.exe" value="gpg" />
+  <property name="gpg.key" value="E1EE085F" />
+
 	<!-- GLOBALS -->
 	<target name="init">
 	</target>
@@ -175,6 +179,7 @@
 		</delete>
 		<delete>
 			<fileset dir="${basedir}" includes="*.zip"/>
+			<fileset dir="${basedir}" includes="*.asc"/>
 			<fileset dir="${basedir}" includes="*.md5"/>
 			<fileset dir="${basedir}" includes="*.sha1"/>
 			<fileset dir="${basedir}" includes="*.asc"/>
@@ -197,4 +202,28 @@
 		</sequential>
 	</macrodef>
 
+  <target name="sign-artifacts" depends="package">
+    <delete failonerror="false" dir="${basedir}" includes="*.asc"/>
+
+    <input message="Enter GPG keystore password: &gt;" addproperty="gpg.passphrase">
+      <handler classname="org.apache.tools.ant.input.SecureInputHandler" />
+    </input>
+
+    <apply executable="${gpg.exe}" inputstring="${gpg.passphrase}"
+           dest="${basedir}" type="file" maxparallel="1" verbose="yes">
+      <arg value="--passphrase-fd"/>
+      <arg value="0"/>
+      <arg value="--batch"/>
+      <arg value="--armor"/>
+      <arg value="--default-key"/>
+      <arg value="${gpg.key}"/>
+      <arg value="--output"/>
+      <targetfile/>
+      <arg value="--detach-sig"/>
+      <srcfile/>
+      <fileset dir="${basedir}" includes="*.zip"/>
+      <globmapper from="*" to="*.asc"/>
+    </apply>
+  </target>
+
 </project>