`roborev init` hook fails when appended after hooks with early exits

[austin3dickey]

Hi!

I noticed roborev init appends its post-commit block to the end of an existing post-commit hook. If the existing hook contains an early exit 0 (e.g., from husky), the roborev block is never reached.

Repro

1. Have a repo with a husky 0.13 post-commit hook that includes has_hook_script postcommit || exit 0
2. Run roborev init
3. Commit — roborev enqueue never runs

[wesm]

That’s fun! Interacting with non-trivial post-commit hook files is really tricky but maybe just prepending would be a solution here.

[wesm]

This was fixed in #300, along with generally overhauling the hooks system. I'll release this in the next couple days