Thank you a.palius, You are right.
usman@pardus2011 ~ $ ls test
dbus-1.4.1-55-p11-i686.pisi dbus-53-55-p11-i686.delta.pisi
usman@pardus2011 ~ $ pisi ix --skip-signing -v -o /home/usman/test/pisi-index.xml /home/usman/test
* Building index of PiSi files under /home/usman/test
Adding /home/usman/test/dbus-1.4.1-55-p11-i686.pisi to package index
* Index file written
usman@pardus2011 ~ $And now pisi-index.xml file contain delta data like this :
<Package>
<Name>dbus</Name>
....
....
<DeltaPackages>
<Delta releaseFrom="53">
<PackageURI>dbus-53-55-p11-i686.delta.pisi</PackageURI>
<PackageSize>214443</PackageSize>
<PackageHash>c5d5dde0c18925bbd571250cfb0f977a885cf54c</PackageHash>
</Delta>
</DeltaPackages>
....
....
</Package>
So.. this is not a bug.
