Some changes/features

[Mudskipper875]

1. Remove redundant arithmetic operations from the percentage function

$(( (elapsed*100)/duration ))

2. Simplify defining the $fit_to_screen variable

   • Bash can only do integer arithmetic.
   • If (( duration < space_available )) is true, $(( duration / space_available )) will be zero.
   • So the value of fit_to_screen will be 0 + 1.

3. Customization of the progress bar

   • The progress bar can be customized using the $BAR_FILL and $BAR_EMPTY variables.

# For example, setting a red progress bar:
export BAR_FILL='\e[1;31m▇\e[0m'
progress-bar 10

4. The escape sequence \r\e[K will return the cursor to the beginning of the line and erase all text up to the end of the line.

[llbit]

The fit_to_screen variable is redundant. The number of characters that are part of the completed progress can be calculated with the expression (space_available * elapsed) / duration and if this is stored in a local variable, say midpoint, inside the loop that calls already_done() and remaining() they can be simplified to:

already_done() { for ((i=0; i<midpoint ; i=i+1 )); do printf "▇"; done }
remaining() { for (( i=midpoint ; i<space_available ; i=i+1 )); do printf " "; done }