Running pre-commit hook only for staged files

[PaulaSazonov]

I'm trying to implement a pre-commit hook that would run mix format and mix credo only on staged files, but defining hook e.g. config :git_hooks, hooks: [ pre_commit: [ verbose: true, tasks: [ {:mix_task, :credo} ], ] ] runs mix credo for all source files. Is it possible to define the hook to take only the staged files as arguments for the mix command? Writing a script for this works when I execute it with {:cmd, "bash script.sh"} but I don't get the colored output I can by running the mix task, and {:file, "script.sh"} fails because of :eacces error. Any guidance would be appreciated!