Bug#890594: devscripts: Implement a salsa-configure script to configure salsa.debian.org project repositories

[Raphaël Hertzog]

Package: devscripts
Version: 2.17.12
Severity: wishlist

Many persons/teams are writing custom scripts to configure the projects
in their new Salsa group.
https://salsa.debian.org/mehdi/salsa-scripts
https://salsa.debian.org/jcowgill/multimedia-cli

It would be nice if devscripts provided such a tool so that we don't have
to reinvent it each time. Those scripts are not only needed when you
migrate but everytime that you create a new project since Gitlab does not
offer any way to configure default integrations for new projects.

Thus I would like this script to be able to extract the list of
projects of a given group. It would then loop over all the projects
and configures them appropriately. It should be idempotent and not break
if the projects have already been configured. It should be usable also
when the team's default configuration changes (say you want to remove a
webhook or modify some of its parameters).

Currently the integrations that most team want to enable are:
- email on pushes (sends mails to tracker.debian.org)
- tagpending hook or close hook (tags bugs as pending or close them
  when the commit message contains a "Closes: #xxx")
- IRC notification (currently with irker, but KGB webhook is also a
  possibility)
- a future "tagpatch" on new merge requests (tags bugs with patch
  and give link to MR, when a new merge request contains a "Closes: #xxx")

It would be nice if there was a way to exclude some projects from
this automatic configuration (either by assigning a tag to the project
or by explicitly listing projects to skip).

For very large groups, it might make sense for the script to add
some sort of marker in configured projects so that it can easily identify
new projects where the configuration must be applied.

Cheers,