commit 9c228ce317d43b6a26ee252499bb25b9cf7a8701
author Akilesh Kailash <akailash@google.com> Tue Mar 04 14:41:16 2025 -0800
committer Akilesh Kailash <akailash@google.com> Tue Mar 04 14:41:16 2025 -0800
tree 0af27973f8a73ce5e166d0b7bc93f224ee906572
parent 8eeceb69f1c8b6dc56da53112f4b91128e63e930

apply-update: Add option to boot device off snapshots

$apply_update --boot_snapshot

~20 seconds to boot off the snapshots

To revert back to original state:
`adb shell snapshotctl revert-snapshots`

Bug: 400723109
Test: apply_update --boot_snapshot
Change-Id: Ia71c93b606149f0f0824085b50a9dc9e76ac5d2a
Signed-off-by: Akilesh Kailash <akailash@google.com>

fs_mgr/libsnapshot/scripts/apply-update.sh

diff --git a/fs_mgr/libsnapshot/scripts/apply-update.sh b/fs_mgr/libsnapshot/scripts/apply-update.sh
index 2a5a8a2..92bff3b 100755
--- a/fs_mgr/libsnapshot/scripts/apply-update.sh
+++ b/fs_mgr/libsnapshot/scripts/apply-update.sh
@@ -99,6 +99,8 @@
                             Now, the script can safely use this flag for update purpose.
 
   --wipe                   Wipe user data during the update.
+  --boot_snapshot          Boot the device off snapshots - No data wipe is supported
+                              To revert back to original state - `adb shell snapshotctl revert-snapshots`
   --help                   Display this help message.
 
 Environment Variables:
@@ -123,6 +125,7 @@
 }
 
 skip_static_partitions=0
+boot_snapshot=0
 flash_bootloader=1
 wipe_flag=0
 help_flag=0
@@ -139,6 +142,9 @@
     --skip_bootloader)
       flash_bootloader=0
       ;;
+    --boot_snapshot)
+      boot_snapshot=1
+      ;;
     --help)
       help_flag=1
       ;;
@@ -208,7 +214,9 @@
 
 log_message "Applying update"
 
-if (( wipe_flag )); then
+if (( boot_snapshot)); then
+  adb shell snapshotctl map-snapshots $DEVICE_PATH
+elif (( wipe_flag )); then
   adb shell snapshotctl apply-update $DEVICE_PATH -w
 else
   adb shell snapshotctl apply-update $DEVICE_PATH