[Bug 1979128] Re: [SRU] ruby-sdbm should be backported to jammy

[Lucas Kanashiro]

Sorry for the delay Mitsuya. I took a quick look at your debdiff and I
have some comments:

- I'd change the version used from 1:1.0.19-2.1ubuntu1 to
1:1.0.19-2.1ubuntu0.1. This is the standard used by the security team
and in this case it makes clear that the delta was added post release
and not during its development cycle.

- The other thing is to be consistent in the version constraints you
added. In the build depends you added ruby-sdbm (>= 1.0.0) and in the
runtime depends you added ruby-sdbm (>= 1.0.0-1). Since
1.0.0-2~ubuntu0.22.04.1 is the only ruby-sdbm possible in Jammy, you
would not need a version constraint to be honest. But if you want to add
you should use ruby-sdbm (>= 1.0.0) without the debian revision.
Moreover, I wouldn't care much about the lintian warning you mentioned
since it is related to backports of new versions, we do not do that in
Ubuntu stable releases (just for "special" packages which is not the
case here).

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https://bugs.launchpad.net/bugs/1979128

Title:
  [SRU] ruby-sdbm should be backported to jammy

Status in bsfilter package in Ubuntu:
  Fix Released
Status in ruby-sdbm package in Ubuntu:
  Fix Released
Status in bsfilter source package in Jammy:
  In Progress
Status in ruby-sdbm source package in Jammy:
  Fix Released

Bug description:
  [Impact]

  In Ruby 3.0, sdbm has been removed from the standard library[1].
  However, some packages, such as the bsfilter package, will fail at
  startup without the sdbm library, LP: #1972040 .

  The ruby-sdbm package does not exist in Jammy, only in Kinetic.
  Therefore, backporting ruby-sdbm from kinetic to jammy and relying on
  ruby-sdbm on the bsfilter side seems to solve the problem.

  [1] https://www.ruby-lang.org/en/news/2020/12/25/ruby-3-0-0-released/

  [Test Plan]

  $ lxc launch ubuntu-daily:jammy ruby-sdbm-test
  $ lxc shell ruby-sdbm-test
  # apt install -y ruby-sdbm
  # ruby -e "require 'sdbm'; SDBM.open 'my_database' do |db| db.update('foo' => 'bar') end"

  The command above will create 2 files: my_database.dir and
  my_database.pag. No exception is expected.

  [Where problems could occur]

  The ruby-sdbm package does not exist in Jammy, I do not believe that
  any regression will occur.

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