grc is buggy with the bash builtin: read -p

[apolopena]

Problem:

User prompts that use read -rp don't work properly with grc
See the reproduction steps for more information

Reproduction Steps:

Save the following as test.conf

# Everything
regexp=.|\.
colours="\033[38;5;38m"

Save the following as test.sh

#!/bin/bash

prompt() {
  local input question="Prompt text: Would you like do something now (y/n)?"
  while true; do
    read -rp "$question" input
    case $input in
      [Yy]* ) echo "yes was chosen"; break;;
      [Nn]* ) echo "no was choosen"; break;;
      * ) echo "Please answer y for yes or n for no.";;
    esac
  done
  return 0
}

echo "The prompt text will only display after the script terminates AND nothing else will be colorized if the -e option is used."
echo "The prompt text will not be colorzied BUT everything else will be colorized if the -s option used"
echo "The prompt text will only display after the script terminates BUT everything else will be colorized if the -e and -s options used"
echo "Everything misbehaves if there is not a delay (0.2 seconds works) added before the read call (user prompt) is made"
sleep .2 && prompt

Run the following commands and observe the behaviour each time:

• grc -ec test.conf bash test.sh
• grc -sc test.conf bash test.sh
• grc -esc test.conf bash test.sh

Prompt text will only be colorized when using the -e or -s option but will only appear after the script terminates which is makes it unusable.

Omitting the -e and or the -s option(s) is a workaround but the prompt text is not colorzied.

Expected behavior

• Prompt text should be colorized just like any other piece of text
• when the -e option, prompt text should be colorized as expected
• when using the -e option. prompt text should appear right away and not after the script terminates

Workarounds

Can anyone suggest anything?

Additional Information

This seems related to: #82