This commit allows the `forgejo-cli actions register` command to change
an existing runner's secret, as discussed in #4610.
It refactors `RegisterRunner` to extract the code that hashes the token,
moving this code to a method called `UpdateSecret` on `ActionRunner`.
A test for the method has been added.
The `RegisterRunner` function is updated so that:
- it relies on `ActionRunner.UpdateSecret` when creating new runners,
- it checks whether an existing runner's secret still matches the one
passed on the command line,
- it updates the runner's secret if it wasn't created and it no longer
matches.
A test has been added for the new behaviour.
This commit changes the code that deletes a runner so it updates the UUID before deleting the record. The new UUID is set to 8 0xff bytes followed by a little endian version of the record's numeric ID. Such UUIDs cannot be created from tokens when registering runners, as the first 16 bytes of the token are in the `[0-9a-f]` range. This should prevent deleted runners from colliding with new records if the tokens share the same first 16 characters.
It is a possible solution to issue #3828
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/3830
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: Emmanuel BENOÎT <tseeker@nocternity.net>
Co-committed-by: Emmanuel BENOÎT <tseeker@nocternity.net>
