bash_progress_bar

Note: There is now also this python implementation

This script is intended to be sourced by other bash scripts. It will allow those scripts to create a progress bar which does not interfere with the scrolling output of the script. The look and feel for this progress bar is based on the progress bar used by APT.

What makes this progress bar different from the basic terminal progress bars which use carriage return (\r) to overwrite their own line, is that this progress bar does not interfere with the normal output of your script. This makes it very easy to update existing scripts to use this bar without having to worry about the scrolling of your output.

Usage

Source this script, then use the provide commands as follows.

1. create progress bar with:

   create_progress_bar --eta --trap --precision 2 -N 100 MyTask

2. update progress bar with:

   draw_progress_bar 15

   or you may want to provide a message for each progress update.

   draw_progress_bar 20 'current task 20'

3. when finish all the tasks, please clear the progress bar:

   destroy_scroll_area

If your program is interactive, and may accept user's input during the progress, you can pause the progress bar, and get user's input, and then continue to update it.

block_progress_bar 45

which will turns the progress bar yellow to indicate some action is requested from the user. After that, continue your tasks keeping progress bar updated.

draw_progress_bar 90

An example can be viewed in test_bar.sh. The actual implementation can be found in progress_bar.sh

Example output: