do not add directories when filesonly is true.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@430489 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -254,6 +254,10 @@ Fixed bugs:
 * <xslt> passes the current file (name + directory) to the stylesheet/transformation.
   xsl-parameter name is configurable.  Bugzilla report 21042.
 
+* The <zip> API allowed creation of directories in file-only archives; a
+  habitual offender was the subclassed <jar>, which included META-INF/ in
+  the destination file regardless of whether filesonly was set to true.
+
 Other changes:
 --------------
 

src/main/org/apache/tools/ant/taskdefs/Zip.java

@@ -1345,6 +1345,11 @@ public class Zip extends MatchingTask {
     protected void zipDir(File dir, ZipOutputStream zOut, String vPath,
                           int mode, ZipExtraField[] extra)
         throws IOException {
+        if (doFilesonly) {
+            log("skipping directory " + vPath + " for file-only archive",
+                    Project.MSG_VERBOSE);
+            return;
+        }
         if (addedDirs.get(vPath) != null) {
             // don't add directories we've already added.
             // no warning if we try, it is harmless in and of itself