[styhead,3/5] arm-systemready/linux-distros: Implement unattended Debian

diff --git a/meta-arm-systemready/recipes-test/arm-systemready-linux-distros/arm-systemready-linux-distros-debian.bb b/meta-arm-systemready/recipes-test/arm-systemready-linux-distros/arm-systemready-linux-distros-debian.bb
index 8dbb75c3..5e5ebc31 100644
--- a/meta-arm-systemready/recipes-test/arm-systemready-linux-distros/arm-systemready-linux-distros-debian.bb
+++ b/meta-arm-systemready/recipes-test/arm-systemready-linux-distros/arm-systemready-linux-distros-debian.bb
@@ -98,8 +98,33 @@  file://${COMMON_LICENSE_DIR}/OPL-1.0;md5=acdf1e4398bd93dc137e271c50316324 \
 file://${COMMON_LICENSE_DIR}/PD;md5=b3597d12946881e13cb3b548d1173851 \
 "
 
-PV = "12.4.0"
-# netinst, DVD-1
-ISO_TYPE = "netinst"
-SRC_URI = "https://cdimage.debian.org/mirror/cdimage/archive/${PV}/arm64/iso-cd/debian-${PV}-arm64-${ISO_TYPE}.iso;unpack=0;downloadfilename=${ISO_IMAGE_NAME}.iso"
-SRC_URI[sha256sum] = "d32d2c63350a932dc0d9d45665985b41413f9e01efc0eacbea981d435f553d3d"
+PV = "12.8.0"
+SRC_URI = "\
+    https://cdimage.debian.org/debian-cd/12.8.0/arm64/iso-dvd/debian-12.8.0-arm64-DVD-1.iso;unpack=0;downloadfilename=${ISO_IMAGE_NAME}.iso;name=debian_iso_image \
+    file://unattended-boot-conf/Debian/preseed.cfg \
+    "
+SRC_URI[debian_iso_image.sha256sum] = "8891fe48bb5a58ae54176eaa6440059bf852044d6b9ae77219e78f9ef8d65149"
+
+ISO_LABEL = "${@oe.utils.vartrue("DISTRO_UNATTENDED_INST_TESTS", "debian-12.8.0-arm64-1", "", d)}"
+BOOT_CATALOG = "${@oe.utils.vartrue("DISTRO_UNATTENDED_INST_TESTS", "boot.catalog", "", d)}"
+BOOT_IMAGE = "${@oe.utils.vartrue("DISTRO_UNATTENDED_INST_TESTS", "EFI/boot/bootaa64.efi", "", d)}"
+EFI_IMAGE = "${@oe.utils.vartrue("DISTRO_UNATTENDED_INST_TESTS", "boot/grub/efi.img", "", d)}"
+
+modifyiso() {
+    UNATTENDED_CONF_DIR="${UNPACKDIR}/unattended-boot-conf/Debian"
+
+    # Append the preseed.cfg file to the initrd
+    gunzip ${EXTRACTED_ISO_TEMP_DIR}/install.a64/initrd.gz
+    (cd ${UNATTENDED_CONF_DIR} && echo preseed.cfg | cpio -H newc -o -A -F ${EXTRACTED_ISO_TEMP_DIR}/install.a64/initrd)
+    gzip ${EXTRACTED_ISO_TEMP_DIR}/install.a64/initrd
+
+    #GRUB
+    # Disable timeout
+    sed -i '/^insmod gzio/ a set timeout=0' ${EXTRACTED_ISO_TEMP_DIR}/boot/grub/grub.cfg
+
+    # Update default menu entry to select automated install
+    sed -i '/^set timeout/ a set default="2>5"' ${EXTRACTED_ISO_TEMP_DIR}/boot/grub/grub.cfg
+
+    # Update kernel boot parameters to enable more text based console output
+    sed -i 's|linux    /install.a64/vmlinuz  auto=true priority=critical --- quiet|linux    /install.a64/vmlinuz auto=true priority=critical DEBIAN_FRONTEND=text --- nomodeset|g' ${EXTRACTED_ISO_TEMP_DIR}/boot/grub/grub.cfg
+}
diff --git a/meta-arm-systemready/recipes-test/arm-systemready-linux-distros/files/unattended-boot-conf/Debian/preseed.cfg b/meta-arm-systemready/recipes-test/arm-systemready-linux-distros/files/unattended-boot-conf/Debian/preseed.cfg
new file mode 100755
index 00000000..47a38c2b
--- /dev/null
+++ b/meta-arm-systemready/recipes-test/arm-systemready-linux-distros/files/unattended-boot-conf/Debian/preseed.cfg
@@ -0,0 +1,75 @@ 
+# Preconfiguration file for Debian unattended installation
+
+# Enable auto mode
+d-i auto-install/enable boolean true
+d-i debconf/priority select critical
+
+# Set language, country and locale
+d-i debian-installer/language string en
+d-i debian-installer/country string GB
+d-i debian-installer/locale string en_GB.UTF-8
+d-i keyboard-configuration/xkb-keymap select us
+
+# Set clock and timezone
+d-i clock-setup/utc boolean true
+d-i time/zone select Europe/London
+
+# Skip installing recommended packages
+d-i base-installer/install-recommends boolean false
+
+# Set user and password
+d-i passwd/root-login boolean false
+d-i passwd/user-fullname string user
+d-i passwd/username string user
+d-i passwd/user-password password unsafe
+d-i passwd/user-password-again password unsafe
+
+# Disable CD-ROM and set mirror
+d-i apt-setup/cdrom/set-first boolean false
+d-i mirror/country string manual NO
+d-i mirror/http/proxy string
+
+# Disable mirror selection
+d-i apt-setup/no_mirror boolean true
+d-i popularity-contest/participate boolean false
+
+# Skip package selection and upgrades
+d-i pkgsel/run_tasksel boolean false
+d-i pkgsel/upgrade select none
+
+# Ensure the 'dbus' package is installed
+d-i pkgsel/include string dbus
+
+# Set host and domain names
+d-i netcfg/get_hostname string debtest
+d-i netcfg/get_domain string unassigned-domain
+
+# Partitioning
+d-i partman-auto/disk string /dev/vda
+d-i partman-auto/init_automatically_partition select Guided - use entire disk
+d-i partman-auto/choose_recipe select All files in one partition (recommended for new users)
+d-i partman-auto/method string regular
+d-i partman/confirm_write_new_label boolean true
+d-i partman/choose_partition select finish
+d-i partman/confirm boolean true
+d-i partman/confirm_nooverwrite boolean true
+
+# Install GRUB bootloader
+d-i grub-installer/only_debian boolean true
+d-i grub-installer/bootdev string /dev/vda
+d-i grub-installer/bootloader-id string debian
+d-i grub-installer/efi-directory string /boot/efi
+
+# Handle errors automatically
+d-i debian-installer/exit-on-error boolean true
+
+# Late command to install GRUB and finalize boot setup
+d-i preseed/late_command string \
+    mount /dev/vda1 /target/boot/efi || true; \
+    in-target mkdir -p /boot/efi/EFI/boot || true; \
+    in-target grub-install --target=arm64-efi --efi-directory=/boot/efi --bootloader-id=debian --removable || true; \
+    in-target update-grub || true; \
+    umount /target/boot/efi || true
+
+# Reboot after installation
+d-i finish-install/reboot_in_progress note