unhide3.sh

#!/usr/bin/env bash

switch ()
{
    defaults read com.apple.finder AppleShowAllFiles
}

switch="$(switch)"

    if [[ "${switch}" = "TRUE" ]]; then
        printf '%s\n' "Hiding files.";
        defaults write com.apple.finder AppleShowAllFiles FALSE;
    else
        if [[ "${switch}" = "FALSE" ]]; then
            printf '%s\n' "Showing files.";
            defaults write com.apple.finder AppleShowAllFiles TRUE;
        fi;
    fi

killall Finder
sleep 0.1
printf '%s\n' "Done."