[PATCH] installer: improve root device detection and skip additional devices

["'Badrikesh Prusty' via isar-users" <isar-users@googlegroups.com>]

Strip trailing digits correctly to determine the base device name for
p-style partitioned devices such as mmcblk0p2 and nvme0n1p3. Handle
these devices by removing the p<partition> suffix while preserving
behavior for traditional devices like sda1.

Skip device-mapper (dm-*) and zram (zram*) devices to prevent
presenting virtual or non-installable devices as installation targets.

Signed-off-by: Badrikesh Prusty <badrikesh.prusty@siemens.com>
---
 .../deploy-image/files/usr/bin/deploy-image-wic.sh   | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/meta-isar/recipes-installer/deploy-image/files/usr/bin/deploy-image-wic.sh b/meta-isar/recipes-installer/deploy-image/files/usr/bin/deploy-image-wic.sh
index ca586aa6..9c041a50 100755
--- a/meta-isar/recipes-installer/deploy-image/files/usr/bin/deploy-image-wic.sh
+++ b/meta-isar/recipes-installer/deploy-image/files/usr/bin/deploy-image-wic.sh
@@ -64,7 +64,11 @@ if ! $installer_unattended; then
         # Always exclude the exact device mounted as /
         exclude_list+=("$current_root_dev")
 
-        base_no_part=${current_root_dev%%[0-9]*}
+        if [[ "$current_root_dev" =~ ^(mmcblk|nvme) ]]; then
+            base_no_part="${current_root_dev%p[0-9]*}"
+        else
+            base_no_part="${current_root_dev%%[0-9]*}"
+        fi
         if [ -n "$base_no_part" ]; then
             exclude_list+=("$base_no_part")
         fi
@@ -121,6 +125,9 @@ if ! $installer_unattended; then
         fi
 
         case $device in
+            dm-*)
+                # skip device-mapper device
+                ;;
             loop*)
                 # skip loop device
                 ;;
@@ -132,6 +139,9 @@ if ! $installer_unattended; then
             ram*)
                 # skip ram device
                 ;;
+            zram*)
+                # skip zram device
+                ;;
             *)
                 #skip any excluded devices (root and its slaves)
                 skip_device=0
-- 
2.39.5

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