initramfs to also use merge-rootfs

initramfs/build-rootfs.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+set -euo pipefail
+
+mkdir -p bin sbin etc proc sys dev lib mnt usr/bin usr/sbin
+
+/build/selective-mods.sh /out/rootfs/lib/modules/$(ls /out/rootfs/lib/modules/) ./
+/build/merge-rootfs.sh "/build/rootfs-extra" "./"
+
+find . -print0 | cpio --null -ov --format=newc | gzip -9 > ../initramfs.cpio.gz

initramfs/rootfs-extra/bin/flash-emmc.sh.tmpl

@@ -0,0 +1,67 @@
+#!/bin/sh
+set -eu
+
+MNT=/mnt
+USB_DEV=/dev/sda
+EMMC_DEV=/dev/mmcblk0
+DEFAULT_GLOB="${MNT}/$${BUILD_TAG}_RELEASE_IMAGE"
+
+mkdir -p "$MNT"
+
+echo "[*] Mounting USB..."
+mount "$USB_DEV" "$MNT"
+
+# Find a default image (first match)
+DEFAULT_IMG="$(ls $DEFAULT_GLOB 2>/dev/null | head -n1 || true)"
+
+echo
+if [ -n "$DEFAULT_IMG" ]; then
+    echo "Default image found:"
+    echo "  $DEFAULT_IMG"
+else
+    echo "No default image found under $DEFAULT_GLOB"
+fi
+echo
+
+# Prompt user
+printf "Image Location (%s): " "${DEFAULT_IMG:-/mnt/...}"
+read -r IMG
+
+# Use default if empty
+if [ -z "$IMG" ]; then
+    IMG="$DEFAULT_IMG"
+fi
+
+# Validate
+if [ -z "$IMG" ] || [ ! -f "$IMG" ]; then
+    echo "Invalid image: $IMG"
+    umount "$MNT" || true
+    exit 1
+fi
+
+echo
+echo "About to write:"
+echo "  Image: $IMG"
+echo "  Target: $EMMC_DEV"
+echo
+
+printf "Type 'YES' to continue: "
+read -r CONFIRM
+
+if [ "$CONFIRM" != "YES" ]; then
+    echo "Aborted."
+    umount "$MNT" || true
+    exit 1
+fi
+
+echo "[*] Flashing..."
+gunzip -c "$IMG" > "$EMMC_DEV"
+
+echo "[*] Syncing..."
+sync
+
+echo "[*] Done."
+umount "$MNT" || true
+
+echo "[*] Rebooting..."
+reboot -f

initramfs/rootfs-extra/init

@@ -14,6 +14,8 @@ mount -t devpts devpts /dev/pts
 echo "Booting kernel took $(cut -d' ' -f1 /proc/uptime) seconds."
 echo "Dropping to shell on ttyS0..."
 
+. /etc/build-info
+
 while true; do
     setsid cttyhack /bin/sh
     echo "Shell exited. Starting another one..."