Switch to PARTUUID

export-image/03-set-partuuid/00-run.sh

@@ -0,0 +1,12 @@
+#!/bin/bash -e
+IMG_FILE="${STAGE_WORK_DIR}/${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}.img"
+
+IMGID="$(fdisk -l ${IMG_FILE} | sed -n 's/Disk identifier: 0x\([^ ]*\)/\1/p')"
+
+BOOT_PARTUUID="${IMGID}-01"
+ROOT_PARTUUID="${IMGID}-02"
+
+sed -i "s/BOOTDEV/PARTUUID=${BOOT_PARTUUID}/" ${ROOTFS_DIR}/etc/fstab
+sed -i "s/ROOTDEV/PARTUUID=${ROOT_PARTUUID}/" ${ROOTFS_DIR}/etc/fstab
+
+sed -i "s/ROOTDEV/PARTUUID=${ROOT_PARTUUID}/" ${ROOTFS_DIR}/boot/cmdline.txt

export-noobs/00-release/files/partition_setup.sh

@@ -12,7 +12,7 @@ mkdir -p /tmp/1 /tmp/2
 mount "$part1" /tmp/1
 mount "$part2" /tmp/2
 
-sed /tmp/1/cmdline.txt -i -e "s|root=/dev/[^ ]*|root=${part2}|"
+sed /tmp/1/cmdline.txt -i -e "s|root=[^ ]*|root=${part2}|"
 sed /tmp/2/etc/fstab -i -e "s|^.* / |${part2}  / |"
 sed /tmp/2/etc/fstab -i -e "s|^.* /boot |${part1}  /boot |"
 

export-noobs/00-release/files/release_notes.txt

@@ -1,5 +1,5 @@
 UNRELEASED:
-  *
+  * Use PARTUUID to support USB boot
 2017-03-02:
   * Updated kernel and firmware (final Pi Zero W support)
   * Wolfram Mathematica updated to version 11

stage1/00-boot-files/files/cmdline.txt

@@ -1 +1 @@
-dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
+dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=ROOTDEV rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait

stage1/01-sys-tweaks/files/fstab

@@ -1,3 +1,3 @@
 proc            /proc           proc    defaults          0       0
-/dev/mmcblk0p1  /boot           vfat    defaults          0       2
+BOOTDEV  /boot           vfat    defaults          0       2
-/dev/mmcblk0p2  /               ext4    defaults,noatime  0       1
+ROOTDEV  /               ext4    defaults,noatime  0       1

stage2/01-sys-tweaks/00-patches/07-resize-init.diff

@@ -1,5 +1,5 @@
 --- a/rootfs/boot/cmdline.txt
 +++ b/rootfs/boot/cmdline.txt
 @@ -1 +1 @@
--dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
+-dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=ROOTDEV rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
-+dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet init=/usr/lib/raspi-config/init_resize.sh
++dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=ROOTDEV rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet init=/usr/lib/raspi-config/init_resize.sh

stage2/01-sys-tweaks/files/resize2fs_once

@@ -12,7 +12,7 @@
 case "$1" in
   start)
     log_daemon_msg "Starting resize2fs_once"
-    ROOT_DEV=`grep -Eo 'root=[[:graph:]]+' /proc/cmdline | cut -d '=' -f 2-` &&
+    ROOT_DEV=$(findmnt / -o source -n) &&
     resize2fs $ROOT_DEV &&
     update-rc.d resize2fs_once remove &&
     rm /etc/init.d/resize2fs_once &&