<available file="META-INF/MANIFEST.MF" property="has.manifest" />

<target name="loadBundleVersion" if="has.manifest">
    <!-- load version, if no current build number -->
    <loadproperties srcfile="META-INF/MANIFEST.MF">
        <filterchain>
            <linecontainsregexp>
                <regexp pattern="^Bundle-Version: \d*.\d*.\d*\s*$" />
            </linecontainsregexp>
        </filterchain>
    </loadproperties>
</target>

<target name="loadBundleVersionRemoveBuild" unless="Bundle-Version" depends="loadBundleVersion">
    <!-- if version not set here we have a current build number so needs to be stripped -->
    <loadproperties srcfile="META-INF/MANIFEST.MF">
        <filterchain>
            <linecontains>
                <contains value="Bundle-Version" />
            </linecontains>
            <tokenfilter>
                <replaceregex pattern=".\d*$" replace="" />
            </tokenfilter>
        </filterchain>
    </loadproperties>
</target>

<target name="loadBundleDetails" depends="loadBundleVersionRemoveBuild">
    <loadproperties srcfile="META-INF/MANIFEST.MF">
        <filterchain>
            <linecontains>
                <contains value="Bundle-SymbolicName" />
            </linecontains>
        </filterchain>
    </loadproperties>
</target>

<target name="updateManifestVersion" if="has.manifest" depends="loadBundleDetails">
    <manifest file="META-INF/MANIFEST.MF" mode="update">
        <attribute name="Bundle-Version" value="${Bundle-Version}.${build.number}" />
    </manifest>
</target>