Correct handling of commands that output percentage bars etc

[jamesrwhite]

For example how composer update shows a percentage of the package being installed currently each value is displayed i.e 5% ... 10% .. 20%.. etc. I think a special character or something along those lines is sent to the terminal to indicate it should clear previous output.

[jamesrwhite]

Some useful info here, it doesn't look like it would be that hard to do :smile:

http://stackoverflow.com/questions/238073/how-to-add-a-progress-bar-to-a-shell-script