Bug#977174: vcswatch: web hook for changed repositories

[Jelmer Vernooij <jelmer@debian.org>]

Package: qa.debian.org
Severity: wishlist

It would be great if vcswatch could call a webhook whenever a packaging
repository changed.

This could be triggered whenever repositories are found to be different
at poll time, but e.g. for salsa this could be triggered by a server side hook
(https://docs.gitlab.com/ee/administration/server_hooks.html#create-a-global-server-hook-for-all-repositories)

This would be helpful for scheduling in the Janitor, being able to trigger
runs as soon as packaging repositories change.

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 5.9.0-3-amd64 (SMP w/2 CPU threads)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled