Bug#384031: pbuilder: interaction with cowbuilder basepath's

Package: pbuilder
Version: 0.157
Severity: normal

  I sometimes need to use different chroots to build my packages (i386
vs. amd64 or sid vs stable) and there is now way with cowbuilder to
passe the --basepath cowbuilder wants to select the chroot, through
pbuilderrc (or at least it's neither obvious nor documented).

  I'd suggest that if BASETGZ ends in .cow then a basepath for cowdancer
is assumed, else a basetgz for pbuilder-debuild.

  (also note that if cowbuilder is used, pbuilder update should run
cowdancer --update instead of trying to update the .tgz ...)