Multi bootloader support

Note: OLDIFS use makes IFS to be reset to "" instead to it being unset.
Either we need to detect if old IFS was unset to unset it
or we need a proper way of setting it as a local variable.
Even more IFS it's not currently used in
Check_package (which it's called from: binary_hdd).
we should have a clean way of resetting/unsetting IFS when calling Check_package.

The other approach it's to explicitly define IFS with its default value in the
places inside live-build code where we implicitly suppose that it's going to have
its default value.

functions/defaults.sh

@@ -536,11 +536,11 @@ Set_defaults ()
 	esac
 
 	# Setting bootloader
-	if [ -z "${LB_BOOTLOADER}" ]
+	if [ -z "${LB_BOOTLOADERS}" ]
 	then
 		case "${LB_ARCHITECTURES}" in
 			amd64|i386)
-				LB_BOOTLOADER="syslinux"
+				LB_BOOTLOADERS="syslinux"
 				;;
 		esac
 	fi
@@ -853,7 +853,10 @@ Check_defaults ()
 		fi
 	fi
 
-	if [ "${LB_BOOTLOADER}" = "syslinux" ]
+
+	LB_PRIMARY_BOOTLOADER=$(echo "${LB_BOOTLOADERS}" | awk -F, '{ print $1 }')
+
+	if [ "${LB_PRIMARY_BOOTLOADER}" = "syslinux" ]
 	then
 		# syslinux + fat or ntfs, or extlinux + ext[234] or btrfs
 		case "${LB_BINARY_FILESYSTEM}" in
@@ -867,7 +870,7 @@ Check_defaults ()
 
 	case "${LIVE_IMAGE_TYPE}" in
 		hdd*)
-			case "${LB_BOOTLOADER}" in
+			case "${LB_PRIMARY_BOOTLOADER}" in
 				grub)
 					Echo_error "You have selected a combination of bootloader and image type that is currently not supported by live-build. Please use either another bootloader or a different image type."
 					exit 1

scripts/build/binary_grub-legacy

@@ -24,9 +24,21 @@ Arguments "${@}"
 Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
 Set_defaults
 
-if [ "${LB_BOOTLOADER}" != "grub-legacy" ]
+FOUND_MYSELF=""
-then
+IFS=","
-	exit 0
+for BOOTLOADER in ${LB_BOOTLOADERS}
+do
+
+       case ${BOOTLOADER} in
+               "grub-legacy" )
+                       FOUND_MYSELF="True"
+                       break ;;
+       esac
+
+done
+
+if [ -z ${FOUND_MYSELF} ] ; then
+        exit 0
 fi
 
 Echo_message "Begin installing grub-legacy..."

scripts/build/binary_grub-pc

@@ -24,9 +24,23 @@ Arguments "${@}"
 Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
 Set_defaults
 
-if [ "${LB_BOOTLOADER}" != "grub-pc" ]
+FOUND_MYSELF=""
-then
+OLDIFS="$IFS"
-	exit 0
+IFS=","
+for BOOTLOADER in ${LB_BOOTLOADERS}
+do
+
+       case ${BOOTLOADER} in
+               "grub-pc" )
+                       FOUND_MYSELF="True"
+                       break ;;
+       esac
+
+done
+IFS="$OLDIFS"
+
+if [ -z ${FOUND_MYSELF} ] ; then
+        exit 0
 fi
 
 Echo_message "Begin installing grub-pc..."

scripts/build/binary_hdd

@@ -57,26 +57,34 @@ esac
 Check_package chroot /usr/share/doc/mtools mtools
 Check_package chroot /sbin/parted parted
 
-case "${LB_BOOTLOADER}" in
+echo "${LB_BOOTLOADERS}" | \
-	grub)
+while IFS="," read -r BOOTLOADER
-		Check_package chroot /usr/sbin/grub grub
+do
-		;;
+	case "${BOOTLOADER}" in
+		grub)
+			Check_package chroot /usr/sbin/grub grub
+			;;
+	esac
+done
 
-	syslinux)
+LB_PRIMARY_BOOTLOADER=$(echo "${LB_BOOTLOADERS}" | awk -F, '{ print $1 }')
-		case ${LB_BINARY_FILESYSTEM} in
+
-			fat*|ntfs)
+case ${LB_PRIMARY_BOOTLOADER} in
-				_BOOTLOADER=syslinux
+		syslinux)
-				;;
+			case ${LB_BINARY_FILESYSTEM} in
-			ext[234]|btrfs)
+				fat*|ntfs)
-				_BOOTLOADER=extlinux
+					_BOOTLOADER=syslinux
-				;;
+					;;
-			*)
+				ext[234]|btrfs)
-				Echo_error "syslinux/extlinux doesn't support ${LB_BINARY_FILESYSTEM}"
+					_BOOTLOADER=extlinux
-				exit 1
+					;;
-				;;
+				*)
-		esac
+					Echo_error "syslinux/extlinux doesn't support ${LB_BINARY_FILESYSTEM}"
-		Check_package chroot /usr/bin/${_BOOTLOADER} ${_BOOTLOADER}
+					exit 1
-		;;
+					;;
+			esac
+			Check_package chroot /usr/bin/${_BOOTLOADER} ${_BOOTLOADER}
+			;;
 esac
 
 # Restoring cache
@@ -168,7 +176,7 @@ case "${LB_BUILD_WITH_CHROOT}" in
 		Chroot chroot "parted -s ${FREELO} set 1 boot on" || true
 		Chroot chroot "parted -s ${FREELO} set 1 lba off" || true
 
-		if [ "${LB_BOOTLOADER}" = "syslinux" ]
+		if [ "${LB_PRIMARY_BOOTLOADER}" = "syslinux" ]
 		then
 			dd if=chroot/usr/lib/SYSLINUX/mbr.bin of=${FREELO} bs=440 count=1
 		fi
@@ -180,7 +188,7 @@ case "${LB_BUILD_WITH_CHROOT}" in
 		parted -s "${FREELO}" set 1 boot on || true
 		parted -s "${FREELO}" set 1 lba off || true
 
-		if [ "${LB_BOOTLOADER}" = "syslinux" ]
+		if [ "${LB_PRIMARY_BOOTLOADER}" = "syslinux" ]
 		then
 			dd if=/usr/lib/SYSLINUX/mbr.bin of=${FREELO} bs=440 count=1
 		fi
@@ -246,7 +254,7 @@ cp -T ${CP_OPTIONS} binary/ chroot/binary.tmp
 
 FIXME()
 {
-if [ "${LB_BOOTLOADER}" = "grub" ]
+if [ "${LB_PRIMARY_BOOTLOADER}" = "grub" ]
 then
 
 cat > chroot/grub.sh << EOF

scripts/build/binary_iso

@@ -107,8 +107,10 @@ then
 	XORRISO_OPTIONS="${XORRISO_OPTIONS} -V \"${LB_ISO_VOLUME}\""
 fi
 
+LB_PRIMARY_BOOTLOADER=$(echo "${LB_BOOTLOADERS}" | awk -F, '{ print $1 }')
+
 # Handle xorriso architecture specific options
-case "${LB_BOOTLOADER}" in
+case "${LB_PRIMARY_BOOTLOADER}" in
 	grub)
 		XORRISO_OPTIONS="${XORRISO_OPTIONS} -no-emul-boot -boot-load-size 4 -boot-info-table"
 		XORRISO_OPTIONS="${XORRISO_OPTIONS} -b boot/grub/stage2_eltorito"
@@ -149,7 +151,7 @@ esac
 #	XORRISO_OPTIONS="${XORRISO_OPTIONS} -m ${XORRISO_EXCLUDE}"
 #fi
 
-if [ "${LB_BOOTLOADER}" = "grub-pc" ]
+if [ "${LB_PRIMARY_BOOTLOADER}" = "grub-pc" ]
 then
 
 cat > binary.sh << EOF

scripts/build/binary_syslinux

@@ -24,9 +24,23 @@ Arguments "${@}"
 Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
 Set_defaults
 
-if [ "${LB_BOOTLOADER}" != "syslinux" ]
+FOUND_MYSELF=""
-then
+OLDIFS="$IFS"
-	exit 0
+IFS=","
+for BOOTLOADER in ${LB_BOOTLOADERS}
+do
+
+       case ${BOOTLOADER} in
+               "syslinux" )
+                       FOUND_MYSELF="True"
+                       break ;;
+       esac
+
+done
+IFS="$OLDIFS"
+
+if [ -z ${FOUND_MYSELF} ] ; then
+        exit 0
 fi
 
 Echo_message "Begin installing syslinux..."

scripts/build/config

@@ -32,7 +32,7 @@ USAGE="${PROGRAM}   [--apt apt|aptitude]\n\
 \t    [--bootappend-install PARAMETER|\"PARAMETERS\"]\n\
 \t    [--bootappend-live PARAMETER|\"PARAMETERS\"]\n\
 \t    [--bootappend-live-failsafe PARAMETER|\"PARAMETERS\"]\n\
-\t    [--bootloader grub-legacy|grub-pc|syslinux]\n\
+\t    [--bootloaders grub-legacy|grub-pc|syslinux]\n\
 \t    [--cache true|false]\n\
 \t    [--cache-indices true|false]\n\
 \t    [--cache-packages true|false]\n\
@@ -137,7 +137,7 @@ Local_arguments ()
 		archive-areas:,parent-archive-areas:,chroot-filesystem:,
 		gzip-options:,image-name:,interactive:,keyring-packages:,linux-flavours:,linux-packages:,
 		security:,updates:,backports:,binary-filesystem:,binary-images:,
-		apt-indices:,bootappend-install:,bootappend-live:,bootappend-live-failsafe:,bootloader:,checksums:,compression:,config:,zsync:,build-with-chroot:,
+		apt-indices:,bootappend-install:,bootappend-live:,bootappend-live-failsafe:,bootloaders:,checksums:,compression:,config:,zsync:,build-with-chroot:,
 		debian-installer:,debian-installer-distribution:,debian-installer-preseedfile:,debian-installer-gui:,
 		grub-splash:,isohybrid-options:,hdd-label:,hdd-size:,iso-application:,iso-preparer:,iso-publisher:,
 		iso-volume:,jffs2-eraseblock:,memtest:,net-root-filesystem:,net-root-mountoptions:,
@@ -491,8 +491,8 @@ Local_arguments ()
 				shift 2
 				;;
 
-			--bootloader)
+			--bootloaders)
-				LB_BOOTLOADER="${2}"
+				LB_BOOTLOADERS="${2}"
 				shift 2
 				;;
 
@@ -1149,9 +1149,9 @@ LB_BOOTAPPEND_INSTALL="${LB_BOOTAPPEND_INSTALL}"
 # (Default: empty)
 LB_BOOTAPPEND_LIVE_FAILSAFE="${LB_BOOTAPPEND_LIVE_FAILSAFE}"
 
-# \$LB_BOOTLOADER: set bootloader
+# \$LB_BOOTLOADERS: set bootloaders
-# (Default: ${LB_BOOTLOADER})
+# (Default: ${LB_BOOTLOADERS})
-LB_BOOTLOADER="${LB_BOOTLOADER}"
+LB_BOOTLOADERS="${LB_BOOTLOADERS}"
 
 # \$LB_CHECKSUMS: set checksums
 # (Default: ${LB_CHECKSUMS})

scripts/build/source_debian

@@ -52,8 +52,15 @@ fi
 # Download sources
 Chroot chroot "dpkg --get-selections" | awk '{ print $1 }' > source-selection.txt
 
+echo "${LB_BOOTLOADERS}" | \
+while IFS="," read -r BOOTLOADER
+do
+  cat >> source-selection.txt << EOF
+  ${BOOTLOADER}
+EOF
+done
+
 cat >> source-selection.txt << EOF
-${LB_BOOTLOADER}
 live-build
 EOF