Bash Progress Bar

progress-bar.sh

#!/bin/bash

# Bash Progress Bar: https://gist.github.com/F1LT3R/fa7f102b08a514f2c535

progressBarWidth=20

# Function to draw progress bar
progressBar () {
  
  # Calculate number of fill/empty slots in the bar
  progress=$(echo "$progressBarWidth/$taskCount*$tasksDone" | bc -l)  
  fill=$(printf "%.0f\n" $progress)
  if [ $fill -gt $progressBarWidth ]; then
    fill=$progressBarWidth
  fi
  empty=$(($fill-$progressBarWidth))

  # Percentage Calculation
  percent=$(echo "100/$taskCount*$tasksDone" | bc -l)
  percent=$(printf "%0.2f\n" $percent)
  if [ $(echo "$percent>100" | bc) -gt 0 ]; then
    percent="100.00"
  fi

  # Output to screen
  printf "\r["
  printf "%${fill}s" '' | tr ' ' ▉
  printf "%${empty}s" '' | tr ' ' ░
  printf "] $percent%% - $text "
}



## Collect task count
taskCount=33
tasksDone=0

while [ $tasksDone -le $taskCount ]; do

  # Do your task
  (( tasksDone += 1 ))

  # Add some friendly output
  text=$(echo "somefile-$tasksDone.dat")

  # Draw the progress bar
  progressBar $taskCount $taskDone $text

  sleep 0.01
done

echo

Hey F1LT3R!

How I could use your progress bar to represent a running bash file? Also, any idea how to add time remaining?
Thanks so much for your help!

Hi,
I was having a problem with the Unicode characters not displaying properly (Ubuntu 16.04). I found out that it's a known bug with GNU tr that it doesn't support Unicode (source), so I modified it to work with sed instead:
27 printf "%${fill}s" '' | sed 's/ /\o342\o226\o210/g'
28 printf "%${empty}s" '' | sed 's/ /\o342\o226\o221/g'

Hope this helps someone.

@nlpthk, not sure what you are asking exactly

@oofnikj Thanks, it worked perfectly for Ubuntu 18.04.

Hi,

in line 7 and 16 the printf should be extended to support systems with different number encoding:

-7 fill=$(printf "%.0f\n" $progress)
+7 fill=$(LC_NUMERIC="en_US.UTF-8"  printf "%.0f\n" $progress)

-16 percent=$(printf "%0.2f\n" $percent)
+16 percent=$(LC_NUMERIC="en_US.UTF-8" printf "%0.2f\n" $percent)