Bug#687624: ITP: libdvdcss-pkg -- automated installer for libdvdcss

[Dmitry Smirnov <onlyjob@member.fsf.org>]

Package: wnpp
Severity: wishlist
X-Debbugs-CC: debian-devel@lists.debian.org

   Package name: libdvdcss-pkg
        Version: 1.2.12-1
Upstream Author: Dmitry Smirnov <onlyjob@member.fsf.org>
        License: GPL-3+
    Description: download, build and install libdvdcss package
                 This package will automatically download, build and install
                 libdvdcss on your system.
                 .
                 libdvdcss is a library for accessing and unscrambling DVDs encrypted
                 with the Content Scramble System (CSS).
                 It is a free software but it may be illegal in some jurisdictions.

This is a proof-of-concept implementation of automated installer for libdvdcss.

Since we can't risk shipping libdvdcss itself here is a proposed implementation
with the following features:

 * Installer is implemented as shell script installed as DPKG post-invoke
   handler.

 * Host package version meant to me an exact match of guest package
   with debian/watch file inherited from guest package for notifications
   about new upstream versions.

 * Package contains "guest" package sources, but not upstream sources.
   Upstream sources will be fetched using "uscan".

 * When "guest" package is built, its debian revision number is changed by
   appending "~local" to clearly mark generated packages.

 * During build of "guest" packages "Host" package is injected to Guest's
   Depends to make sure generated packages will be removed on "host"
   package remove/purge.

 * Host package uses debconf to warn user regarding possible
   implications.

 * If user choose to remove "guest" package, debconf configuration
   will be updated to prevent re-installation of "guest" packages.

 * "dpkg-reconfigure libdvdcss-pkg" may be used to build and install
   guest packages. Otherwise guest package(s) will be built and installed
   from DPKG post-invoke handler. Although automated, unfortunately this
   will delay installation till next apt-get operation. Is there a better
   way to hook into apt-get sequence?

 * Upgrades are gracefully handled i.e. when host package is updgraded it
   will build and install guest packages automatically, if prior user
   decision allows it. As mentioned above, installation will be delayed.

Source package is available from 

	http://mentors.debian.net/package/libdvdcss-pkg

Ideas are welcome -- please share your thoughts.