Derive the path to the pre-commit executable

Returns "" if search was not successful, the path otherwise.

path_derive_precommit_exec()

Heuristic

• First check if there is an executable on the $PATH using path_derive_precommit_exec_path()

• Search os dependent for other possible locations for common installation methods.

• If not, check if we can find one in a conda environment with path_derive_precommit_exec_conda(). Do this last as it's the slowest.