[DRE-maint] Bug#747712: FTBFS: ruby2.0 is not supported by gem2deb anymore

[Christian Hofstaedtler]

Source: rabbit
Version: 2.1.2-1
Severity: serious
Justification: fails to build from source
User: debian-ruby at lists.debian.org
Usertags: ruby2.0-rm

Dear Maintainer,

During a rebuild of ruby-related packages your package failed to
build with these errors:

  Entering dh_ruby --install
E: ruby2.0 is not supported by gem2deb anymore
dh_auto_install: dh_ruby --install /«PKGBUILDDIR»/debian/tmp returned exit code 1
make: *** [binary] Error 1
debian/rules:5: recipe for target 'binary' failed
dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit status 2


Please note that the default ruby has been switched to 2.1 in sid.
If possible, please switch to the metapackages and `dh_ruby
--print-supported` for detecting the ruby to build for.
(Also, if everything goes according to plan, this is the last ruby
transition for jessie.)

Please find the full build log attached.

Thanks,
  -ch
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