They were slowing down checkout, merge and rewrite.
This also cleans up the "lints" section which was running into problems with `{all_files}` being too much for some tools to handle. And it makes sure that eslint and prettier runs for core plugins as well.
We are linting SCSS on the GitHub actions CI but not
on pre-commit, which can lead to lint failures in CI.
Better to warn developers about this locally like
our other lints.
Moves the most important checks into a linter. It gets executed by Lefthook as well as the docker rake task and Github actions. Doing those checks in rspec takes too long and it produces errors when the discourse:test Docker image contains old, invalid locale files.
This used to work due to side effects.
`rake parallel:migrate` used to work very inconsistently and would only migrate
some of the databases.
This introduces the recommended change to db.yml so the correct database is
found based off TEST_ENV_NUMBER if for some reason we did not set it using
RAILS_DB
Also avoids a bunch of schema dumping which is not needed when migrating
parallel specs
DB number 1 is very odd cause for whatever reason parallel spec is not
setting it.
Overcommit uses prebuilt hooks and require global installation.
To avoid this issues replace it with Lefthook.
Lefthook will be installed with npm packages. New contributors
will have fully consistent git hooks.
