Dry run and console color helper

color-run.sh

#!/bin/bash

# Usage: `. color-run.sh`
# To perform dry run set `EXEC_DRY_RUN=1`

function colors {
	# check if stdout is a terminal...
	if test -t 1; then

		# see if it supports colors...
		ncolors=$(tput colors)

		if test -n "$ncolors" && test $ncolors -ge 8; then
			ETEXT_BOLD="$(tput bold)"
			ETEXT_DIM="$(tput dim)"
			ETEXT_UNDERLINE="$(tput smul)"
			ETEXT_STANDOUT="$(tput smso)"
			ETEXT_NORMAL="$(tput sgr0)"
			ETEXT_BLACK="$(tput setaf 0)"
			ETEXT_RED="$(tput setaf 1)"
			ETEXT_GREEN="$(tput setaf 2)"
			ETEXT_YELLOW="$(tput setaf 3)"
			ETEXT_BLUE="$(tput setaf 4)"
			ETEXT_MAGENTA="$(tput setaf 5)"
			ETEXT_CYAN="$(tput setaf 6)"
			ETEXT_WHITE="$(tput setaf 7)"
		else
			ETEXT_BOLD=""
			ETEXT_DIM=""
			ETEXT_UNDERLINE=""
			ETEXT_STANDOUT=""
			ETEXT_NORMAL=""
			ETEXT_BLACK=""
			ETEXT_RED=""
			ETEXT_GREEN=""
			ETEXT_YELLOW=""
			ETEXT_BLUE=""
			ETEXT_MAGENTA=""
			ETEXT_CYAN=""
			ETEXT_WHITE=""
		fi
	fi
}
function info {
	echo "${ETEXT_BOLD}${ETEXT_CYAN}"$@"${ETEXT_NORMAL}";
}
function success {
	echo "${ETEXT_BOLD}${ETEXT_GREEN}"$@"${ETEXT_NORMAL}";
}
function error {
	echo "${ETEXT_BOLD}${ETEXT_RED}"$@"${ETEXT_NORMAL}";
}
function warning {
	echo "${ETEXT_BOLD}${ETEXT_YELLOW}"$@"${ETEXT_NORMAL}";
}

function exec {
	echo "${ETEXT_BLUE}"$@"${ETEXT_NORMAL}"
	if [ -z "${EXEC_DRY_RUN}" ] || [ "${EXEC_DRY_RUN}" = 0 ]; then
		$@
		if [ 0 != $? ]; then
		    error "Script failed; bail";
		    exit 1;
		fi
	fi
}
#RUN
colors