Drop `--database` and `--no-database`, split?/drop `sqliterepo_c`

[kontura]

• The --database and --no-database options could be dropped entirely in favor of users deliberately calling sqliterepo_c

  • EL7 is the only significant beneficiary, and EL7 will be EOL in a year
  • As per the proposal that was submitted to fedora-devel, createrepo_c would not necessarily generate EL7-compatible repos by default due to the treatment of comps metadata anyway - this would be an even less disruptive than that as yum is perfectly capable of handling repos without sqlite metadata, it is merely preferred if present.

• sqliterepo_c could be split into a new package so that it could be dropped at some point in the future without breaking createrepo_c's semantic versioning

  • Or maybe it makes sense to just remove entirely, now, as per the above points? Splitting the package off is just a conservative option.

Pulp currently does use createrepo_c's sqlite metadata support, but we're going to drop it in the near future.

Originally posted by @dralley in #338 (comment)

[j-mracek]

What would be benefit of the split?

[dralley]

so that it could be dropped at some point in the future without breaking createrepo_c's semantic versioning

I think that was written before the point where you mentioned that we'd probably just do a 2.0 in a couple of years, though, and it wouldn't be a big deal.

[j-mracek]

I suggest to deliver the change with 2.0 version.

[dralley]

@j-mracek Do you want to have a deprecation warning on --database before then, or just drop it.

[j-mracek]

Documented deprecation without warning is a good first step.