Bash script template with progressbar

Bash progressbar

Naming file

progressbar.sh

#!/bin/bash

# Show progress bar
function show_progress {
    end=$1
    msg=$2
    # Spaces to hide previous message
    spaces='                        '
    for i in `seq 1 4 $end`; do
        echo -n █
    done
    if [ $end -lt 100 ]; then
        for i in `seq $(($end+1)) 4 100`; do
            echo -n ░
        done
        echo -n -e " $end% ($msg)$spaces\r"
    else
        echo -e " $end% ($msg)$spaces"
    fi
}

# Start timer
time_start=$((`date +%s`*1000+`date +%-N`/1000000))

show_progress 0 'Do first thing'
do_first_thing

show_progress 40 'Do second thind'
do_second_thing

show_progress 80 'Do third thing'
do_third_thing

show_progress 100 'Complete'

# Calculate time
time_end=$((`date +%s`*1000+`date +%-N`/1000000))
time_progress_ms=$(($time_end - $time_start))  # miliseconds
time_progress=$(echo "scale=3; $time_progress_ms/1000" | bc | sed 's/^\./0./')  # seconds

echo "Time in progress: $time_progress sec"