Struggling with multi-tarball source of yorick-optimpack

[Andreas Tille <andreas@an3as.eu>]

Hi,

I tried to upload yorick-* packages that had remaining pointers to
Alioth.  This worked fine for yorick-soy, yorick-ygsl and yorick-z
so far.  Unfortunately yorick-optimpack is a bit tricky since if
you do

   dget http://deb.debian.org/debian/pool/main/y/yorick-optimpack/yorick-optimpack_1.3.2+dfsg+1.4.0-1.dsc

you get a multi-tarball source which was not commited to the Git
repository.  In principle this is possible with the following gbp.conf:

   https://salsa.debian.org/science-team/yorick-optimpack/-/blob/master/debian/gbp.conf?ref_type=heads

and than doing

$ gbp import-orig --pristine-tar --no-interactive PATH/TO/yorick-optimpack_1.3.2+dfsg+1.4.0.orig.tar.gz
gbp:error: Cannot find component tarball /home/andreas/debian-maintain/salsa/science-team/botd/build-area/yorick-optimpack_1.3.2+dfsg+1.4.0.orig-optimpack1.tar.gz

The problem seems to be that `.orig.tar.gz` is GZIP compressed while
`.orig-optimpack1.tar.gz` is XZ compressed.  I tried my luck with
specifying the compression in gbp.conf but failed.

Any idea how to import the source properly?

Kind regards
    Andreas.

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