frontend: tidy

no need to have exit in both conditions

no need to have most of the script within a case branch when all other
cases result in an exit.

Gbp-Dch: Short

frontend/lb

@@ -21,14 +21,12 @@ USAGE="lb {clean|config|build}"
 
 case "${1}" in
 	-h|--help)
-		if [ $(which man) ]
-		then
+		if [ $(which man) ]; then
 			man lb
-			exit 0
 		else
 			${0} --usage
-			exit 0
 		fi
+		exit 0
 		;;
 
 	""|-u|--usage)
@@ -39,53 +37,43 @@ case "${1}" in
 		echo "${VERSION}"
 		exit 0
 		;;
-
-	*)
-		COMMAND="${1}"
-		shift
-
-		ENV=""
-
-		if [ "${COMMAND}" != "config" ]
-		then
-			# Checking user account
-			if [ "$(id -u)" -ne "0" ]
-			then
-				Echo_error "Root privileges needed!"
-				exit 1
-			fi
-		fi
-
-		for _FILE in config/environment config/environment.binary
-		do
-			if [ -e "${_FILE}" ]
-			then
-				ENV="${ENV} $(grep -v '^#' ${_FILE})"
-			fi
-		done
-
-		if [ -x "${LIVE_BUILD}/scripts/build/${COMMAND}" ]
-		then
-			# User has live-build copied locally in the system
-			SCRIPT="${LIVE_BUILD}/scripts/build/${COMMAND}"
-		elif [ -x "local/live-build/scripts/build/${COMMAND}" ]
-		then
-			# User has live-build copied locally in the config
-			SCRIPT="local/live-build/scripts/build/${COMMAND}"
-		elif [ -x /usr/lib/live/build/${COMMAND} ]
-		then
-			# User has live-build installed in the system
-			SCRIPT=/usr/lib/live/build/"${COMMAND}"
-		elif [ $(which "${COMMAND}") ]
-		then
-			# User has live-build commands in path
-			SCRIPT="${COMMAND}"
-		else
-			Echo_error "No such script: ${COMMAND}"
-			exit 1
-		fi
-
-		Echo "[%s] %s" "$(date +'%F %T')" "lb ${COMMAND} $(echo ${@})"
-		${ENV} exec "${SCRIPT}" "${@}"
-		;;
 esac
+
+COMMAND="${1}"
+shift
+
+ENV=""
+
+if [ "${COMMAND}" != "config" ]; then
+	# Checking user account
+	if [ "$(id -u)" -ne "0" ]; then
+		Echo_error "Root privileges needed!"
+		exit 1
+	fi
+fi
+
+for _FILE in config/environment config/environment.binary; do
+	if [ -e "${_FILE}" ]; then
+		ENV="${ENV} $(grep -v '^#' ${_FILE})"
+	fi
+done
+
+if [ -x "${LIVE_BUILD}/scripts/build/${COMMAND}" ]; then
+	# User has live-build copied locally in the system
+	SCRIPT="${LIVE_BUILD}/scripts/build/${COMMAND}"
+elif [ -x "local/live-build/scripts/build/${COMMAND}" ]; then
+	# User has live-build copied locally in the config
+	SCRIPT="local/live-build/scripts/build/${COMMAND}";
+elif [ -x /usr/lib/live/build/${COMMAND} ]; then
+	# User has live-build installed in the system
+	SCRIPT=/usr/lib/live/build/"${COMMAND}"
+elif [ $(which "${COMMAND}") ]; then
+	# User has live-build commands in path
+	SCRIPT="${COMMAND}"
+else
+	Echo_error "No such script: ${COMMAND}"
+	exit 1
+fi
+
+Echo "[%s] %s" "$(date +'%F %T')" "lb ${COMMAND} $(echo ${@})"
+${ENV} exec "${SCRIPT}" "${@}"