The post-commit hook support in hosting services had a few issues that

could lead to unintentionally closing the wrong review requests on

other repositories. They also weren't compatible with Local Sites.
The URL for the hook identified the repository, and the URL also

contained the hosting service ID, but we wouldn't use either to properly

validate the repositories. That meant that if a hook was set up to point

to repository 1 on GitHub, and then had a commit referencing a review

request on repository 2 on Bitbucket, things would break.
We now capture the hosting service ID and pass it, the local site name,

and the repository ID to the function that handles closing review

requests. That function will then use that information to narrow down

the list of repositories being processed, in order to avoid operating on

some other review request. The function has also been rewritten to

minimize the number of SQL queries needed.
Local Sites were broken because nothing bothered to check for them. The

URLs were added to the root urlpatterns, and not to

localsite_urlpatterns. There was some code that did something weird with

trying to get a Local Site from a resolved URL, but that didn't really

do anything. Now everything is wired up to allow for hooks on Local

Sites and to restrict operations to review requests on the Local Site.
There's a few other changes here and there to help consistency and to

minimize code. For instance, we had different error responses for

invalid payloads, and they weren't really correct. We just use HTTP 400

now.
Unit tests were added for the three services that support post-commit

hooks. They test hooks with and without Local Sites, and test invalid

repository IDs, Local Site names, and service IDs.
The unit test for testing service registration was also split up into

several tests, since it was testing several things.

Unit tests pass. Previously, the validation checking tests failed,

as did the Local Site tests. Only the ones with good data going to

the right review requests would pass.