Bug#707180: lintian: please include the reverse of python-depends-but-no-python-helper

[Daniel Kahn Gillmor <dkg@fifthhorseman.net>]

Package: lintian
Version: 2.5.10.5
Severity: wishlist


It would be great to have a lintian check that is the reverse of
python-depends-but-no-python-helper.  That is, a lintian check that is
python-helper-but-no-python-depends.

Please see the discussion here for background:

http://lists.alioth.debian.org/pipermail/python-modules-team/2013-April/015358.html

The concern is that some packages use dh's python2 helper but do not
mention ${python:Depends} in the Depends: clause of a created binary
package.

To avoid false positives, the current suggestion (thanks to jakub
wilk) is:

> I think Lintian should emit the tag only if none of the binary packages 
> have ${python:Depends}. This is not bulletproof, but should catch most 
> mistakes.

Thanks for lintian,

       --dkg

-- System Information:
Debian Release: 7.0
  APT prefers testing
  APT policy: (500, 'testing'), (200, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.8-trunk-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lintian depends on:
ii  binutils                       2.22-8
ii  bzip2                          1.0.6-4
ii  diffstat                       1.55-3
ii  file                           1:5.11-3
ii  gettext                        0.18.1.1-10
ii  hardening-includes             2.3
ii  intltool-debian                0.35.0+20060710.1
ii  libapt-pkg-perl                0.1.27
ii  libarchive-zip-perl            1.30-6
ii  libc-bin                       2.13-38
ii  libclass-accessor-perl         0.34-1
ii  libclone-perl                  0.31-1+b2
ii  libdpkg-perl                   1.16.10
ii  libemail-valid-perl            0.190-1
ii  libipc-run-perl                0.92-1
ii  libparse-debianchangelog-perl  1.2.0-1
ii  libtimedate-perl               1.2000-1
ii  liburi-perl                    1.60-1
ii  locales                        2.13-38
ii  man-db                         2.6.3-3
ii  patchutils                     0.3.2-1.1
ii  perl [libdigest-sha-perl]      5.14.2-21

lintian recommends no packages.

Versions of packages lintian suggests:
pn  binutils-multiarch     <none>
ii  dpkg-dev               1.16.10
ii  libhtml-parser-perl    3.69-2
pn  libperlio-gzip-perl    <none>
ii  libtext-template-perl  1.45-2
ii  man-db                 2.6.3-3
ii  xz-utils [lzma]        5.1.1alpha+20120614-2

-- debconf-show failed