How do you use Lefthook in a TypeScript monorepo?

[idleberg]

At my company, we have dozens of TypeScript projects that were recently moved into a single monorepo. For historic reasons, we use different Prettier configs per project, or even different formatrters. Using a single config from the root level is currently not an option.

Consider the following pre-commit hook:

[pre-commit.commands.prettier]
glob = ["*.{js,ts,cjs,mjs,jsx,tsx}"]
run = "pnpm exec prettier --cache --write {staged_files}"
stage_fixed = true

The problem is that lefthook is not able to determine the closest Prettier config relative to a staged file – it always uses the root config. Prior to lefthook, we used a combination of husky and lint-staged. The former doesn't work great in monorepos, the latter could deal with the problem I described. As far as I can tell, they determine the closest lint-staged config and use it's directory as CWD when executing a hook command.

I'm certain we're not the first with this problem. Did anybody manage to fix this issue? Are there plans to tackle this in future versions of Lefthook?

[idleberg]

Seems I found a good solution in a different thread. It results in a lot of redundant Lefthook configs, but it's better than nothing!