progress.sh

# spinner characters
# http://stackoverflow.com/questions/2685435/cooler-ascii-spinners

# spinner code
# https://github.com/IntellexApps/blcheck.git

# Define spinner
#SPINNER="-\|/"
#SPINNER=".oO@*"
#SPINNER="▉▊▋▌▍▎▏▎▍▌▋▊▉"
#SPINNER="←↖↑↗→↘↓↙"
#SPINNER="▁▂▃▄▅▆▇█▇▆▅▄▃▁"
#SPINNER="▖▘▝▗"
#SPINNER="┤┘┴└├┌┬┐"
#SPINNER="◢◣◤◥"
#SPINNER="▤▥▦▧"
#SPINNER="⣾⣽⣻⢿⡿⣟⣯⣷"
#SPINNER="⠁⠂⠄⡀⢀⠠⠐⠈"
#SPINNER="◰◳◲◱"
#SPINNER="◴◷◶◵"
SPINNER="◐◓◑◒"

# Show progres
progress() {
    # Bar
    x=$(($1 % ${#SPINNER} + 1))
    BAR=$(echo $SPINNER | awk "{ print substr(\$0, ${x}, 1) }")
    if test -z "$PLAIN"; then
        printf "\r ";
    fi
    # BAR as printf arg so that backslash will be litteraly interpreted
    printf "[ %s %3s%% ] checking... %4s / $2  " "$BAR" $(($1 * 100 / $2)) "$1";
}

main() {
    i=0;
    max=100;
    for i in $(seq $max); do
	progress "$i" "$max"
	sleep 0.1
    done
}

main