which all

which_all.zsh

function which_all() {
    # Like `which`, but prints each location it finds
    # on $PATH, not just the first one. zsh only.
    #
    # Example:
    # > which_all conda
    # /opt/homebrew/Caskroom/miniconda/base/bin/conda
    # /opt/homebrew/Caskroom/miniconda/base/condabin/conda
    # /opt/homebrew/bin/conda

    typeset -A which_results
    query=$1

    for path_entry in ${(s/:/)PATH}; do
        query_path="${path_entry}/${query}"
        if [ -x "${query_path}" ]; then
            # We are treating this associative array
            # as a set; we only need the keys.
            which_results[${query_path}]="throwaway_value"
        fi
    done

    which_results_keys=("${(@k)which_results}")
    for which_result in "${which_results_keys[@]}"; do
        echo "${which_result}"
    done | sort
}