Functions to color sh-output. Useful for logging or bash-prompt.

color_functions.sh

changeColor () {
  ## Usage
  local help_message="\
Usage:
  changeColor ((fg|bg|light|light-bg)? color (bold|dim|underlined|inverted)*)+
Example:
  changeColor fg red light-bg green underlined bold"
  #/>

  ## local properties
  local codes='0;'
  local prefix=3
  local color=''
  local format=''
  #/>

  ## parse command-line
  while [[ $1 ]]; do
    case $1 in
      -h|--help)
        echo -e "$help_message"
        return 0;;
      fg)
        prefix=3;;
      bg)
        prefix=4;;
      light)
        prefix=9;;
      light-bg)
        prefix=10;;
      black)
        color=0;;
      red)
        color=1;;
      green)
        color=2;;
      yellow)
        color=3;;
      blue)
        color=4;;
      magenta)
        color=5;;
      cyan)
        color=6;;
      gray)
        color=7;;
      bold)
        format="1;";;
      dim)
        format="2;";;
      underlined)
        format="4;";;
      blink)
        format="5;";;
      inverted)
        format="7;";;
    esac
    codes+="$format"
    if [[ "$color" ]]; then
      codes+="${prefix}${color};"
    fi
    shift
  done
  #/>
  echo -en "\e[${codes%?}m"
}

padWithEscape () {
  echo -en "\[$*\]"
}

paddedColor () {
  echo -n $(padWithEscape $(changeColor $*))
}