show_progressbar.sh

#!/bin/bash

BAR_SIZE=40
BAR_CHAR_DONE='#'
BAR_CHAR_TODO='-'
BAR_PERCENTAGE_SCALE=2

show_progress() {
    CURRENT=$1
    TOTAL=$2

    PERCENT=$(awk "BEGIN {printf \"%.1f\", $CURRENT / $TOTAL * 100}")
    DONE=$(awk "BEGIN {printf \"%.1f\", $BAR_SIZE * $PERCENT / 100}")
    TODO=$(awk "BEGIN {printf \"%.1f\", $BAR_SIZE - $DONE}")
    DONE_BAR=$(printf "%${DONE}s" | tr " " "${BAR_CHAR_DONE}")
    TODO_BAR=$(printf "%${TODO}s" | tr " " "${BAR_CHAR_TODO}")

    echo -n -e "\rProgress: [${DONE_BAR}${TODO_BAR}] ${PERCENT}%"

    if [ $TOTAL -eq $CURRENT ]; then
        echo " DONE"
    fi
}