Now forums can enroll their sites to be showcased in the Discourse [Discover](https://discourse.org/discover) directory. Once they enable the site setting `include_in_discourse_discover` to enroll their forum the `CallDiscourseHub` job will ping the `api.discourse.org/api/discover/enroll` endpoint. Then the Discourse Hub will fetch the basic details from the forum and add it to the review queue. If the site is approved then the forum details will be displayed in the `/discover` page.
It switches to a different command for detecting the current git branch because the old command always returned HEAD as branch when the git repository is on a detached head (e.g. tag). The new command doesn't return a branch when the repository is on a detached head, which allows us to fall back to the `version` variable that is stored in the git config since https://github.com/discourse/discourse_docker/pull/707. It contains the value of the `version` from `app.yml`.
It also includes a small change to specs, because our tests usually run on specific commits instead of a branch or tag, so Discourse.git_branch always returns "unknown". We can use the "unknown" branch for tests, so it makes sense to ignore it only in other envs.
Zeitwerk simplifies working with dependencies in dev and makes it easier reloading class chains.
We no longer need to use Rails "require_dependency" anywhere and instead can just use standard
Ruby patterns to require files.
This is a far reaching change and we expect some followups here.
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
api.discourse.org server apparently does not like GET
requests that have a port number in the headers Host entry
Additionally fix the actual GET query; it should use query
parameters not a body.
