add a special property to set to build the MacOSX installer

since we do not ship it by default
add a check that our POMS are able to compile the code in release.sh

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1591187 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -1205,6 +1205,7 @@
 
   <condition property="buildosxpackage">
     <os family="mac"/>
+    <isset property="buildosxpackage.required"/>
   </condition>
 
   <target name="pkg_distribution" depends="zip_distribution" if="buildosxpackage">

release.sh

@@ -42,6 +42,9 @@ if $linux; then
    export JAVA_HOME=/usr/lib/jvm/java-6-openjdk
    JDK_VERSION=1.6
 fi
+# check that one can build under maven
+mvn -f src/etc/poms/pom.xml -DskipTests  package
+rm -rf target
 export PATH=$JAVA_HOME/bin:$PATH
 echo ANT_HOME=$ANT_HOME
 echo JAVA_HOME=$JAVA_HOME