fixes https://github.com/TryGhost/Toolbox/issues/532
- we should protect against failures entering `main` which could be
avoided by running a quick unit test beforehand
- this reintroduces Lerna as it supports parallelisation and `--since`,
to run linting and unit tests on packages that have changed since
upstream
- up until this commit, git hooks were only used by a handful of people
because they were a pain:
- they'd only be set up when you did `yarn setup`
- the existing hooks ran `yarn lint` on all projects, which was
incredibly slow
- as a result, not many of us actually had them enabled, but this would
cause issues in CI because people were pushing un-linted commits
- other JS projects tend to use husky to automate the git hook setup and
lint-staged to speed up linting on changed files
- this commit switches to using them both
- `lint-staged` only runs `eslint` on staged JS files that are about to
be committed - if there's a linting error, it will stop the commit
- I've configured the pre-commit hook to successfully exit in CI because we
don't want to run pre-commit hooks right now
- this means we can remove Grunt - yay!
refs 002cf5b0eb
- The hook file has to be executable to be triggered in the pre-push stage:
hint: The '.git/hooks/pre-push' hook was ignored because it's not set as executable.
refs 81cd5fac7e
- While developing locally it's common to commit small WIP changes which might contain linting errors. Having the check done once on a pre-push phase gives enoght protection from pushing out broken code and reduces frustration when developing locally
