Rename boot entries with old naming scheme

A new naming scheme for boot entries was introduced in
version 2014.5 [1]. We need to rename the old ones to this
new scheme before running `ostree admin kargs edit-in-place`.
Otherwise, the updated bootloader configuration will be written
to a new file instead of updating the existing one making the
system not bootable.

[1] https://github.com/ostreedev/ostree/pull/3206
Resolves: RHEL-45151

ostree-readonly-sysroot-migration

@@ -4,6 +4,15 @@
 
 set -euo pipefail
 
+rename_boot_entries() {
+    local -r boot_entries="$(find /boot/loader/entries -name 'ostree-*-*\.conf')"
+    for boot_entry in ${boot_entries} ; do
+        new_boot_entry=$(echo "${boot_entry}" | sed -e 's/ostree-\([1-9]\+\).*/ostree-\1.conf/')
+        echo "Renaming ${boot_entry} to ${new_boot_entry}"
+        mv "${boot_entry}" "${new_boot_entry}"
+    done
+}
+
 main() {
     # Used to condition execution of this unit at the systemd level
     local -r stamp_file="/var/lib/.ostree-readonly-sysroot"
@@ -19,6 +28,10 @@ main() {
         exit 0
     fi
 
+    # A new naming for bootboot entries was introduced in 2024.5
+    # version: https://github.com/ostreedev/ostree/pull/3206
+    [[ "${OSTREE_SYSROOT_OPTS:-none}" == *bootboot-naming-1* ]] || rename_boot_entries
+
     local -r boot_entries="$(ls -A /boot/loader/entries/ | wc -l)"
 
     # Ensure that we can read BLS entries to avoid touching systems where /boot