DO NOT REPLY [Bug 30751] New: - Jar with both attributes update="true" and filesetmanifest="true" is broken

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http://issues.apache.org/bugzilla/show_bug.cgi?id=30751

Jar with both attributes update="true" and filesetmanifest="true" is broken

           Summary: Jar with both attributes update="true" and
                    filesetmanifest="true" is broken
           Product: Ant
           Version: 1.6.2
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Core tasks
        AssignedTo: dev@ant.apache.org
        ReportedBy: eric.fayol@netsecureone.com


I would like to update a jar and merge its manifest with manifests from the 
filesets.
   <jar destfile="jar1.jar" update="true" filesetmanifest="merge">
      <zipfileset src="jar2.jar" includes="**"/>
   </jar>

This doesn't work because filesetmanifest="true" makes <jar> build a new 
archive after updating as we can see in the Ant ouput:
      [jar] Updating jar: E:\jar1.jar
      [jar] Building jar: E:\jar1.jar
Consequently, the jar now contains only files from jar2, except for manifest 
which intriguingly is jar1's original. 
Not setting filesetmanifest attribute would have produced an archive with both 
jar1 and jar2's files but would not have updated manifest.

What I currently have to do to get the correct merged jar is:
   <jar destfile="copy-of-jar1.jar" filesetmanifest="merge">
      <zipfileset src="${LIB}/jar1.jar" includes="**"/>
      <zipfileset src="${LIB}/jar2.jar" includes="**"/>
   </jar>
   <move file="copy-of-jar1.jar" tofile="jar1.jar" overwrite="true"/>

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