ANSI Codes for exporting in bash scripts

ansi.bash

export CLEAR=`printf '\033[0m'`

# EFFECTS / FORMATTING
export BOLD=`printf '\033[1m'`
export DIM=`printf '\033[2m'`
export UNDERLINE=`printf '\033[4m'`

# FOREGROUND
export BLACK=`printf '\033[30m'`
export RED=`printf '\033[31m'`
export GREEN=`printf '\033[32m'`
export YELLOW=`printf '\033[33m'`
export BLUE=`printf '\033[34m'`
export MAGENTA=`printf '\033[35m'`
export CYAN=`printf '\033[36m'`
export WHITE=`printf '\033[37m'`

# BACKGROUND
export BLACK_BG=`printf '\033[40m'`
export RED_BG=`printf '\033[41m'`
export GREEN_BG=`printf '\033[42m'`
export YELLOW_BG=`printf '\033[43m'`
export BLUE_BG=`printf '\033[44m'`
export MAGENTA_BG=`printf '\033[45m'`
export CYAN_BG=`printf '\033[46m'`
export WHITE_BG=`printf '\033[47m'`

# BRIGHT/LIGHT FOREGROUND
export GREY=`printf '\033[90m'`
export BRED=`printf '\033[91m'`
export BGREEN=`printf '\033[92m'`
export BYELLOW=`printf '\033[93m'`
export BBLUE=`printf '\033[94m'`
export BMAGENTA=`printf '\033[95m'`
export BCYAN=`printf '\033[96m'`
export BWHITE=`printf '\033[97m'`

# BRIGHT/LIGHT BACKGROUND
export GREY_BG=`printf '\033[100m'`
export BRED_BG=`printf '\033[101m'`
export BGREEN_BG=`printf '\033[102m'`
export BYELLOW_BG=`printf '\033[103m'`
export BBLUE_BG=`printf '\033[104m'`
export BMAGENTA_BG=`printf '\033[105m'`
export BCYAN_BG=`printf '\033[106m'`
export BWHITE_BG=`printf '\033[107m'`

style_described_by() {
    while (($#)) ; do
        case $1 in
            BOLD|BOLDED|bold|bolded)
            VALUE=1
            ;;
            DIM|dim)
            VALUE=2
            ;;
            UNDERLINE|UNDERLINED|underline|underlined)
            VALUE=4
            ;;
            BLACK|black)
            VALUE=30
            ;;
            RED|red)
            VALUE=31
            ;;
            GREEN|green)
            VALUE=32
            ;;
            YELLOW|yellow)
            VALUE=33
            ;;
            BLUE|blue)
            VALUE=34
            ;;
            MAGENTA|magenta)
            VALUE=35
            ;;
            CYAN|cyan)
            VALUE=36
            ;;
            WHITE|white)
            VALUE=37
            ;;
            GREY|grey)
            VALUE=90
            ;;
            BRIGHT|bright)
            brightness=60
            shift
            continue
            ;;
            BACKGROUND|BG|background|bg)
            background=10
            ;;
            *)
            # just ignore invalid codes
            shift
            if (($#)) ; then
                continue
            else
                # strip extraneous semicolon
                SEQUENCE="${SEQUENCE%;}"
                break
            fi
            ;;
        esac

        if ((brightness && VALUE >= 30 && VALUE < 90)) ; then
            ((VALUE += brightness))
            brightness=0
        fi

        if ((background)) ; then
            if ((VALUE >= 30)) ; then
                SEQUENCE="${SEQUENCE%${VALUE};}"
                ((VALUE += background))
            else
                # strip most recent code
                SEQUENCE="${SEQUENCE%;${VALUE};}"
                # strip all other codes to have only the previous code
                lastcode="${SEQUENCE##*;}"
                SEQUENCE="${SEQUENCE%;*};"
                ((VALUE = lastcode + background))
            fi
            background=0
        fi
 
        SEQUENCE="${SEQUENCE}${VALUE}"

        shift

        # add a semi-colon between codes
        if (($#)) ; then
            SEQUENCE="${SEQUENCE};"
        fi
    done

    printf '\033[%sm' ${SEQUENCE}
}

example.sh

#! /usr/bin/env sh

. ansi.bash

echo -e "${RED}this is red text${CLEAR}"

# bare language
style=`style_described_by grey background bright green bold underline`

# natural language
style=`style_described_by a grey background with bright bold green underlined text`

echo -e "${style}hello world${CLEAR}"