Trash on the shell. Small bashrc implementation

trash.sh

function trash {
    TRASHDIR="$HOME/TRASH"
    DATE="$(date '+%Y-%m-%d_%H:%M:%S.%N')"

    if [ -z "$1" ]; then
        echo "usage: $0 <filenames...>" > /dev/stderr
        exit 1
    fi

    for FILE in "$@"; do
        DEST="$TRASHDIR/$DATE/$(dirname "$(realpath --relative-to "$HOME" -s "$FILE")")"
        mkdir -p "$DEST"
        mv "$FILE" "$DEST"
    done
}

function trash-ls {
    TRASHDIR="$HOME/TRASH"
    ls "$TRASHDIR"/*
}

function trash-empty {
    TRASHDIR="$HOME/TRASH"
    echo "really clear trash?"
    select yn in "Yes" "No"; do
        case $yn in
            Yes )
                chmod -R +w "$TRASHDIR"
                rm -rf --one-file-system "$TRASHDIR"/*;
                break;;
            No ) exit;;
        esac
    done
}