try.sh

#!/usr/bin/env bash

#===============================================================================
#
#   DESCRIPTION:  function to ease catching return codes of processes/commands
#
#===============================================================================

# use the text() function for making pretty output,
# should probably check if function already exists and make this conditional
source "${HOME}/bash_functions/colortext.sh"

#command_status is global
command_status=
function try() {
	if [ "$#" = "0" ]
	then # not enough parameters were provided
		echo "ERROR: sytnax is 'try <silent|warn|fatal> command'"
		exit 1
	fi
	local returncode=0
	local severity=${1}
	shift
	local cmd="${*}"

	$cmd
	returncode=$?

	if [[ ${returncode} -gt 0 ]]
	then
		case ${severity} in
			silent )
				command_status=${returncode}
				;;
			warn )
				printf "%s: '%s' failed with return code -%s-\n" "$(text yellow "Warning")" "$(text blue "${cmd}")" "$(text yellow "${returncode}") "
				command_status=${returncode}
				;;
			fatal )
				printf "%s: '%s' failed with return code -%s-\n" "$(text red "Error")" "$(text blue "${cmd}")" "$(text yellow "${returncode}")"
				exit ${returncode}
				;;
			* )
				printf "%s: Wrong usage of the try() function\n" "$(text red "Error")"
				exit 1
				;;
		esac
	fi
} # end of function try

#-------------------------------------------------------------------------------
#  Example usage
#-------------------------------------------------------------------------------
#
#	try silent ls -al doesnotexist
#	echo ${command_status}
#	try warn   ls -al doesnotexist
#	try warn   false
#	try fatal  ls -al doesnotexist

#	try fatal cmake -DCMAKE_INSTALL_PREFIX=${installprefix%/} .
#	try fatal make
#	try warn  make man
#	try warn  make doc
#	try fatal make install