I am trying to use the uptodate task to see if I need to rebuild my program.

[code]
<target name="buildrequired">
                <uptodate property=Required" targetfile="build.zip">
                        <srcfiles dir="${unzip.location}" includes="**/*" />
                </uptodate>
                <antcall target="update" />
                <antcall target="else" />
        </target>       
        <target name="update" if="Required">
                <echo message="A new build is required." />
        </target>
        <target name="else" unless="Required"
                <echo message="No new build is required." />
        </target>
[/code]

Based on my understanding. If the build.zip file has a last modified date
newer then any files in the ${unzip.location}, the Required property will be
set to true and a message will appear saying that a new build is required.
if the unzipped location is newer then the build.zip then a message will
appear that no new build is required. Testing this, I have tried and older
build.zip file and a newer build.zip file. Both cases Required is always
set, and a message appears saying a new build is required. Can somebody help
me figure out where I am going wrong?

Thanks.
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