libinstall/colorize.sh



    1 #!/usr/bin/env bash
    2 # Pkgself builds self-extracting installers
    3 # Copyright (C) 2018  Aaron Ball <nullspoon@oper.io>
    4 #
    5 # This program is free software: you can redistribute it and/or modify
    6 # it under the terms of the GNU General Public License as published by
    7 # the Free Software Foundation, either version 3 of the License, or
    8 # (at your option) any later version.
    9 #
   10 # This program is distributed in the hope that it will be useful,
   11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
   12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   13 # GNU General Public License for more details.
   14 #
   15 # You should have received a copy of the GNU General Public License
   16 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
   17 
   18 set -e
   19 
   20 #
   21 # Useful color codes
   22 #
   23 # Normal colors
   24 export CRED="$(printf '\033[0;31m')"
   25 export CGREEN="$(printf '\033[0;32m')"
   26 export CYELLOW="$(printf '\033[0;33m')"
   27 export CBLUE="$(printf '\033[0;34m')"
   28 export CMAGENTA="$(printf '\033[0;35m')"
   29 export CCYAN="$(printf '\033[0;36m')"
   30 export CGREY="$(printf '\033[0;37m')"
   31 export CWHITE="$(printf '\033[0;38m')"
   32 export CRESET="$(printf '\033[0m')"
   33 # Bold colors
   34 export CBRED="$(printf '\033[1;31m')"
   35 export CBGREEN="$(printf '\033[1;32m')"
   36 export CBYELLOW="$(printf '\033[1;33m')"
   37 export CBBLUE="$(printf '\033[1;34m')"
   38 export CBMAGENTA="$(printf '\033[1;35m')"
   39 export CBCYAN="$(printf '\033[1;36m')"
   40 export CBGREY="$(printf '\033[1;37m')"
   41 export CBWHITE="$(printf '\033[1;38m')"
   42 
   43 
   44 # colorize:
   45 # @color Escape sequence to color text with
   46 #
   47 # Colors the text from stdin with the specified color escape sequence.
   48 # NOTE: Resets escape sequence at the end of each line
   49 #
   50 # Returns 0 always
   51 colorize() {
   52   local color="${1}"
   53   # If the tty is a terminal, support color
   54   if [ -t 1 ]; then
   55     sed -e "s/^/${color}/" -e "s/$/${CRESET}/"
   56     return 0
   57   fi
   58   # Tty is not a teriminal, print without color support
   59   cat
   60 }