scripts: set_assignee: set reviewers for modules

Add support for setting reviewers as well for module PRs, in addition to
the assignees.

Note that this still only works on repositories with an assignee on
record since it does not seem to be possible to query for PRs that have
no reviewers.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>

scripts/set_assignees.py

@@ -286,7 +286,10 @@ def process_modules(gh, maintainers_file):
             log(f"No maintainers for: {area}")
             continue
 
-        log(f"Found {area}, maintainers={maintainers}")
+        collaborators = maintainers_file.areas[area].collaborators
+
+        log(f"Found {area}, maintainers={maintainers}, collaborators={collaborators}")
+
         repo_name = f"{args.org}/{project.name}"
         repos[repo_name] = maintainers_file.areas[area]
 
@@ -309,9 +312,15 @@ def process_modules(gh, maintainers_file):
         area = repos[repo_name]
 
         for maintainer in area.maintainers:
-            log(f"Adding {maintainer} to {pull.html_url}")
+            log(f"Assigning {maintainer} to {pull.html_url}")
             if not args.dry_run:
                 pull.add_to_assignees(maintainer)
+                pull.create_review_request(maintainer)
+
+        for collaborator in area.collaborators:
+            log(f"Adding {collaborator} to {pull.html_url}")
+            if not args.dry_run:
+                pull.create_review_request(collaborator)
 
 
 def main():