1 files changed, 99 insertions, 0 deletions

diff --git a/scripts/build-image-release.sh b/scripts/build-image-release.sh
new file mode 100755
index 0000000..32f8f91
--- /dev/null
+++ b/scripts/build-image-release.sh
@@ -0,0 +1,99 @@
+#!/usr/bin/env bash
+#
+# scripts/build-image.sh — assemble a bootable rs-dos disk image (UEFI/GPT)
+#
+# Layout:
+#   Partition 1: ESP (FAT32) — rsboot bootloader + kernel
+#
+# Output:
+#   rs-dos.img (or custom path) — bootable raw disk image for UEFI
+#
+# Usage:
+#   ./scripts/build-image.sh [output.img]
+#
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
+
+cd "$PROJECT_DIR"
+
+BUILD_DIR="$PROJECT_DIR/build"
+ESP_DIR="$PROJECT_DIR/esp"
+
+IMAGE="${1:-$PROJECT_DIR/rs-dos.img}"
+TARGET=x86_64-unknown-uefi
+PROFILE=release
+OUT_DIR="target/${TARGET}/${PROFILE}"
+
+BOOTLOADER="$BUILD_DIR/bootloader/BOOTX64.EFI"
+KERNEL="$OUT_DIR/rsdos.efi"
+BZIMAGE="$ESP_DIR/bzImage"
+INITRD="$ESP_DIR/initramfs.cpio.gz"
+BOOT_EFI="$ESP_DIR/EFI/BOOT/BOOTX64.EFI"
+
+ESP_START=2048 # 1 MiB offset (standard alignment)
+ESP_SIZE_MB=64
+
+IMAGE_SIZE_MB=$((ESP_SIZE_MB + 2)) # ESP + GPT gap + backup
+
+# ---- checks ----
+for cmd in sfdisk mkfs.vfat mcopy truncate dd; do
+        if ! command -v "$cmd" &>/dev/null; then
+                echo "Error: $cmd not found"
+                exit 1
+        fi
+done
+
+# ---- build kernel ----
+echo "[1/4] Building kernel..."
+cargo build --release --package rsdos --target x86_64-unknown-uefi ${CARGO_FLAGS:-}
+
+# ---- build bootloader ----
+echo "[2/4] Building bootloader..."
+if [ ! -f "$BOOTLOADER" ]; then
+        "$SCRIPT_DIR/build-bootloader.sh"
+fi
+
+# ---- assemble ESP ----
+echo "[3/4] Assembling ESP..."
+mkdir -p "$ESP_DIR/EFI/BOOT"
+cp "$KERNEL" "$BZIMAGE"
+cp "$BOOTLOADER" "$BOOT_EFI"
+if [ ! -f "$INITRD" ]; then
+        printf '' | gzip >"$INITRD"
+fi
+
+# ---- create disk image ----
+echo "[4/4] Writing disk image..."
+rm -f "$IMAGE"
+truncate -s "${IMAGE_SIZE_MB}M" "$IMAGE"
+
+# GPT partition table: single EFI System partition
+sfdisk --quiet "$IMAGE" <<EOF
+label: gpt
+type=U, start=$ESP_START, size=+
+EOF
+
+# Build FAT32 image with ESP contents
+ESP_IMG=$(mktemp)
+truncate -s "${ESP_SIZE_MB}M" "$ESP_IMG"
+mkfs.vfat -F 32 -n "RS-DOS" "$ESP_IMG" >/dev/null 2>&1
+
+# Copy files into FAT
+mmd -i "$ESP_IMG" ::/EFI 2>/dev/null || true
+mmd -i "$ESP_IMG" ::/EFI/BOOT 2>/dev/null || true
+mcopy -i "$ESP_IMG" "$BOOT_EFI" ::/EFI/BOOT/BOOTX64.EFI
+mcopy -i "$ESP_IMG" "$BZIMAGE" ::/bzImage 2>/dev/null || true
+mcopy -i "$ESP_IMG" "$INITRD" ::/initramfs.cpio.gz 2>/dev/null || true
+
+# Inject FAT into image at partition offset
+dd if="$ESP_IMG" of="$IMAGE" bs=512 seek="$ESP_START" conv=notrunc 2>/dev/null
+rm -f "$ESP_IMG"
+
+echo ""
+echo "=== Done: $IMAGE ==="
+ls -lh "$IMAGE"
+echo ""
+echo "Boot with:  ./scripts/boot-image.sh"
+echo "USB:        sudo dd if=$IMAGE of=/dev/sdX bs=4M status=progress"