Run live specific scripts on non live layers

Allow execution of lb_binary_linux-image and lb_chroot_live-packages on
any layer by setting LIVE_PASSES.

live-build/auto/config

@@ -260,6 +260,22 @@ _sanitize_passes ()
 	echo $passes
 }
 
+_get_live_passes ()
+{
+	# Returns a list of all passes that ends with .live for automated live passes detection
+	# $1 list of passes
+	local passes="$1"
+	local livepasses=""
+	[ -z "$passes" ] && return
+
+	for pass in $passes; do
+		if echo $pass | grep -Eq '\.live*'; then
+			livepasses="$pass $livepasses"
+		fi
+	done
+	echo $livepasses
+}
+
 if [ -z "${IMAGEFORMAT:-}" ]; then
 	case $PROJECT:${SUBPROJECT:-} in
 		ubuntu-cpc:*)
@@ -1031,6 +1047,12 @@ lb config noauto \
 	"$@"
 
 PASSES=$(_sanitize_passes "$PASSES")
+LIVE_PASSES=${LIVE_PASSES:-$(_get_live_passes "$PASSES")}
+
+if [ -n "$PASSES" ] && [ -z "$LIVE_PASSES" ]; then
+	Echo_warning "Multi-layered mode is enabled, but we didn't find any live pass." \
+	             "Either set \$LIVE_PASSES or add a pass ending with '.live'."
+fi
 
 echo "LB_CHROOT_HOOKS=\"$CHROOT_HOOKS\"" >> config/chroot
 echo "SUBPROJECT=\"${SUBPROJECT:-}\"" >> config/chroot
@@ -1038,6 +1060,9 @@ echo "LB_DISTRIBUTION=\"$SUITE\"" >> config/chroot
 if [ -n "$PASSES" ]; then
 	echo "PASSES=\"$PASSES\"" >> config/common
 fi
+if [ -n "$LIVE_PASSES" ]; then
+	echo "LIVE_PASSES=\"$LIVE_PASSES\"" >> config/common
+fi
 echo "LB_BINARY_HOOKS=\"$BINARY_HOOKS\"" >> config/binary
 echo "BUILDSTAMP=\"$NOW\"" >> config/binary
 echo "SUBPROJECT=\"${SUBPROJECT:-}\"" >> config/binary

live-build/lb_binary_layered

@@ -100,10 +100,14 @@ build_layered_squashfs () {
 	# Prepare initrd + kernel
 	# Main manifest and size files
 	prefix="livecd.$PROJECT${SUBARCH:+-$SUBARCH}"
-	if echo $pass | grep -Eq '\.live*' && test ! -e "${prefix}.manifest"; then
+	if [ ! -e "${prefix}.manifest" ]; then
+		for livepass in $LIVE_PASSES; do
+			[ "$livepass" != "$pass" ] && continue
 			lb binary_linux-image ${*}
 			cp ${squashfs_f_size} "${prefix}.size"
 			cp "${squashfs_f_manifest}.full" "${prefix}.manifest"
+			break
+		done
 	fi
 
 	(cd "overlay.${pass}/" &&

live-build/lb_chroot_layered

@@ -220,9 +220,11 @@ create_chroot_pass () {
 	Chroot chroot "apt-get --purge -y autoremove"
 
 	# Add live packages to live layers
-	if echo $pass | grep -Eq '\.live*'; then
+	for livepass in $LIVE_PASSES; do
+		[ "$livepass" != "$pass" ] && continue
 		lb chroot_live-packages ${*}
-	fi
+		break
+	done
 
 	# Run includes by pass
 	lb_chroot_includes ${pass} ${*}