Make fetching of backports and proposed-updates repositories optional

The Apertis pipeline imports backport and/or proposed-updates versions
by default, this is not needed and leads to miss some security updates.
Because, importing versions from backports and proposed-updates is not
part of our standard workflow, this should only be optional to avoid
confusing the pipeline.

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

tools/apertis-pkg-pull-updates

@@ -253,6 +253,8 @@ def main():
   parser.add_argument('--package', dest='package', type=str, help='the package name (e.g. glib2.0)') # TODO: figure this out from the repo
   parser.add_argument('--upstream', dest='upstream', type=str, required=True, help='the upstream suite (e.g. buster)')
   parser.add_argument('--mirror', dest='mirror', type=str, required=True, help='the upstream mirror (e.g. http://deb.debian.org/debian)')
+  parser.add_argument('--backports', action='store_true', help='check backports repository')
+  parser.add_argument('--proposed-updates', action='store_true', help='check proposed-updates repository')
   args = parser.parse_args()
   package_name = args.package
   # buster-security → buster,
@@ -264,7 +266,12 @@ def main():
   package_name = args.package or get_package_name()
   print('source package', package_name)
   prepare_git_repo(upstream_suite)
-  for suite in [f'{upstream_suite}-security', f'{upstream_suite}-backports', f'{upstream_suite}-proposed-updates', upstream_suite]:
+  list_suites = [f'{upstream_suite}-security', upstream_suite]
+  if args.backports:
+      list_suites.append(f'{upstream_suite}-backports')
+  if args.proposed_updates:
+      list_suites.append(f'{upstream_suite}-proposed-updates')
+  for suite in list_suites:
       local_version_branch, local_version = get_newest_branch_version(upstream_suite)
       print('local version:', local_version)
       remote_version = should_update(suite, package_name, local_version, upstream_suite==suite)