shell日志颜色处理

记录一下shell日志颜色处理

_colors=${bs_colors:-$(tput colors 2>/dev/null || echo 0)}
__detect_color_support() {
    # shellcheck disable=sc2181
    if [ $? -eq 0 ] && [ "$_colors" -gt 2 ]; then
        rc='\033[1;31m'
        gc='\033[1;32m'
        bc='\033[1;34m'
        yc='\033[1;33m'
        ec='\033[0m'
    else
        rc=""
        gc=""
        bc=""
        yc=""
        ec=""
    fi
}
__detect_color_support
echoerror() {
    printf "${rc} * error${ec}: %s\\n" "$@" 1>&2;
}
echoinfo() {
    printf "${gc} *  info${ec}: %s\\n" "$@";
}
echowarn() {
    printf "${yc} *  warn${ec}: %s\\n" "$@";
}