Added new multi bootloader helper functions

* Added: functions/bootloaders.sh . This file adds bootloader functions that are heavily used in efi scenarios where a bootloader can act as a first or an extra bootloader.

Since the introduction of the new switch:

--bootloaders

you can setup it like this:

--bootloaders=syslinux,grub-efi

.

This means that syslinux is the first bootloader and grub-efi is the extra bootloader.

* Added new bootloader functions: Check_Non_First_Bootloader and Check_Non_Extra_Bootloader.

These functions let each one of the bootloaders abort the build because
they cannot perform a role either as a first bootloader or as an extra bootloader.

* Added bootloader functions: Check_First_Bootloader_Role, Check_Extra_Bootloader_Role and Check_Any_Bootloader_Role

These functions let bootloaders to force their default role in a single line.

At the same time many binary bootloaders were rewritten to make use of the new bootloader role functions explained above.

These roles were enforced:

binary_grub-legacy : First bootloader
binary_grub-pc : Either first or extra bootloader
binary_syslinux : Either first or extra bootloader

If a bootloader is tried to be used in a role that it's not meant to be used then the build fails because that might lead to a non-bootable system.

5 files changed, 8 insertions, 57 deletions

diff --git a/scripts/build/binary_grub-legacy b/scripts/build/binary_grub-legacy
index f885c00cc..93d9b9e14 100755
--- a/scripts/build/binary_grub-legacy
+++ b/scripts/build/binary_grub-legacy
@@ -24,22 +24,7 @@ Arguments "${@}"
 Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
 Set_defaults
 
-FOUND_MYSELF=""
-IFS=","
-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
+Check_First_Bootloader_Role "grub-legacy"
 
 Echo_message "Begin installing grub-legacy..."
 
diff --git a/scripts/build/binary_grub-pc b/scripts/build/binary_grub-pc
index 1eae93a2a..9252f7acf 100755
--- a/scripts/build/binary_grub-pc
+++ b/scripts/build/binary_grub-pc
@@ -24,24 +24,7 @@ Arguments "${@}"
 Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
 Set_defaults
 
-FOUND_MYSELF=""
-OLDIFS="$IFS"
-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
+Check_Any_Bootloader_Role "grub-pc"
 
 Echo_message "Begin installing grub-pc..."
 
diff --git a/scripts/build/binary_hdd b/scripts/build/binary_hdd
index b45b2a900..400403c0a 100755
--- a/scripts/build/binary_hdd
+++ b/scripts/build/binary_hdd
@@ -67,7 +67,7 @@ do
 	esac
 done
 
-case ${LB_PRIMARY_BOOTLOADER} in
+case ${LB_FIRST_BOOTLOADER} in
 		syslinux)
 			case ${LB_BINARY_FILESYSTEM} in
 				fat*|ntfs)
@@ -182,7 +182,7 @@ case "${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 [ "${LB_PRIMARY_BOOTLOADER}" = "syslinux" ]
+		if [ "${LB_FIRST_BOOTLOADER}" = "syslinux" ]
 		then
 			dd if=chroot/usr/lib/$(echo ${_BOOTLOADER} | tr [a-z] [A-Z])/mbr.bin of=${FREELO} bs=440 count=1
 		fi
@@ -202,7 +202,7 @@ case "${LB_BUILD_WITH_CHROOT}" in
 		parted -s "${FREELO}" set 1 boot on || true
 		parted -s "${FREELO}" set 1 lba off || true
 
-		if [ "${LB_PRIMARY_BOOTLOADER}" = "syslinux" ]
+		if [ "${LB_FIRST_BOOTLOADER}" = "syslinux" ]
 		then
 			dd if=/usr/lib/$(echo ${_BOOTLOADER} | tr [a-z] [A-Z])/mbr.bin of=${FREELO} bs=440 count=1
 		fi
@@ -268,7 +268,7 @@ cp -T ${CP_OPTIONS} binary/ chroot/binary.tmp
 
 FIXME()
 {
-if [ "${LB_PRIMARY_BOOTLOADER}" = "grub" ]
+if [ "${LB_FIRST_BOOTLOADER}" = "grub" ]
 then
 
 cat > chroot/grub.sh << EOF
diff --git a/scripts/build/binary_iso b/scripts/build/binary_iso
index 67dfc85a2..a390f61a4 100755
--- a/scripts/build/binary_iso
+++ b/scripts/build/binary_iso
@@ -149,7 +149,7 @@ esac
 #	XORRISO_OPTIONS="${XORRISO_OPTIONS} -m ${XORRISO_EXCLUDE}"
 #fi
 
-if [ "${LB_PRIMARY_BOOTLOADER}" = "grub-pc" ]
+if [ "${LB_FIRST_BOOTLOADER}" = "grub-pc" ]
 then
 
 cat > binary.sh << EOF
diff --git a/scripts/build/binary_syslinux b/scripts/build/binary_syslinux
index 66c14a059..1a442d7a2 100755
--- a/scripts/build/binary_syslinux
+++ b/scripts/build/binary_syslinux
@@ -24,24 +24,7 @@ Arguments "${@}"
 Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
 Set_defaults
 
-FOUND_MYSELF=""
-OLDIFS="$IFS"
-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
+Check_Any_Bootloader_Role "syslinux"
 
 Echo_message "Begin installing syslinux..."