iop: feeds_update: return 1 on failure and add -i to update index only

Handle failures correctly so that CI for example will terminate. Add
-i option to update index only and not heads.

Change-Id: Idabcd8c855eb513bf702c0808aff28b28262c9c7

iop/scripts/feeds_update.sh

@@ -1,15 +1,26 @@
-#! /bin/bash
+#!/bin/bash
 
 function feeds_update {
-
+	heads=1
 	developer=0
 	override=1
-	start=$(date -u +'%s')
-	while getopts "n" opt; do
+	while getopts "inh" opt; do
 		case $opt in
+		i)
+			heads=0
+			;;
 		n)
 			override=0
 			;;
+		h|\?)
+			echo "Usage: ./iop feeds_update [-i] [-n] [-h]"
+			echo
+			echo "OPTIONS:"
+			echo "  -i - Only update index. Do not change HEAD in feeds."
+			echo "  -n - Do not replace core packages with iopsys versions."
+			echo "  -h - Display this help message and exit."
+			exit 1
+			;;
 		esac
 	done
 
@@ -17,17 +28,18 @@ function feeds_update {
 
 	cp .config .genconfig_config_bak
 
-	#if -d argument is passed, clone feeds with ssh instead of http
-	if [ $developer == 1 ]; then
-		./scripts/feeds update -g
-	else
-		./scripts/feeds update
+	if [ $heads == 1 ]; then
+		if [ $developer == 1 ]; then
+			./scripts/feeds update -g || exit 1
+		else
+			./scripts/feeds update || exit 1
+		fi
 	fi
-	./scripts/feeds update -ai
+	./scripts/feeds update -ai || exit 1
 
 	# replace core packages with iopsys versions
 	if [ $override == 1 ]; then
-		./scripts/feeds install -f -p openwrt_core -a
+		./scripts/feeds install -f -p openwrt_core -a || exit 1
 	fi
 
 	(
@@ -38,20 +50,20 @@ function feeds_update {
 
 	# targets need to be installed explicitly
 	for target in $(ls ./feeds/targets); do
-		./scripts/feeds install -f -p targets $target
+		./scripts/feeds install -f -p targets $target || exit 1
 	done
 
 	# install all packages
-	./scripts/feeds install -a
+	./scripts/feeds install -a || exit 1
 
 	# remove broken symlinks ( for packages that are no longer in the feed )
-	find -L package/feeds -maxdepth 2 -type l -delete
+	find -L package/feeds -maxdepth 2 -type l -delete || exit 1
 
 	cp .genconfig_config_bak .config
-	make defconfig
+	make defconfig || exit 1
 
 	# record when we last run this script
-	touch tmp/.iop_bootstrap
+	touch tmp/.iop_bootstrap || exit 1
 
 	# always return true
 	exit 0