difficulty ensuring lefthook runs if you use through bundler in some places, but homebrew in others

[technicalpickles]

Hooks will try to run lefthook a number of ways:

https://github.com/evilmartians/lefthook/blob/master/internal/templates/hook.tmpl#L22-L70

In practice, I've noticed it can be a challenge to make sure the right lefthook runs if you use a version manager that uses shims (ie nodenv, rbenv, asdf, etc) for some projects, and have a system-wide installed lefthook for others.

For example, if gem install lefthook at some point, I have this on the front of my PATH:

❯ which lefthook
/Users/josh.nichols/.rbenv/shims/lefthook

Assuming I bundle install, it's not a problem to run in a project that bundled it. The problem is when I go elsewhere, and the PATH is the same... except the right version might not be installed for ruby:

# elsewhere....
❯ which lefthook
/Users/josh.nichols/.rbenv/shims/lefthook
❯ lefthook version
rbenv: version `3.1.1' is not installed (set by RBENV_VERSION environment variable)

[technicalpickles]

I started drafting this to propose a solution to this, but figure I should describe the problem first!

I think one way that could help our teams' usage is to also check for bin/lefthook. It's a common bundler pattern to use bundler binstub to create files in the bin directory which will handle bundling if needed, then running the right version.

If the hook script did that, and I manage lefthook through bundler and have a binstub, it should always run the right version. I'm not sure what other frameworks do re binstubs.

I was also thinking this could be an opportunity to make bin/lefthook use something like https://dotslash-cli.com/

[technicalpickles]

@mrexox would you be open to adding bin/lefthook to the list of commands checked in the hook?

Another option might be to give a custom template for the git hook to use.