add make_disk include

build.py

@@ -6,7 +6,7 @@ import subprocess
 import multiprocessing
 from utils.bootstrap_setup import setup_bootstrap
 from utils.common import load_config
-from utils.make_disk import create_disk_image
+from utils.make_disk import create_disk_image, setup_loop_device
 
 BASE_DIR = os.getcwd()
 TMP_DIR = os.path.join(BASE_DIR, "tmp")
@@ -85,7 +85,10 @@ def main():
     else:
         print("Skipping rootfs bootstrap")
 
-    create_disk_image(TMP_DIR, config, vendor, device)
+    disk_image_path = create_disk_image(TMP_DIR, config, vendor, device)
+    if disk_image_path:
+        loop_device = setup_loop_device(disk_image_path)
+        print(f"Loop device setup at {loop_device}")
     print(f"Build completed for {vendor}/{device} with distro {distro}")
 
 

utils/make_disk.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+
+import os
+import subprocess
+
+
+def create_disk_image(tmp_dir, config, vendor, device):
+
+    boot_size = config.get("BOOT_SIZE").rstrip("MB")
+    root_size = config.get("ROOT_SIZE").rstrip("MB")
+
+    if not root_size:
+        print("Error: ROOT_SIZE is not defined in the configuration.")
+        return
+
+    if not boot_size:
+        boot_size = "0"
+
+    disk_image_path = os.path.join(tmp_dir, vendor, device, "disk.img")
+    cmd = [
+        "dd",
+        "if=/dev/zero",
+        f"of={disk_image_path}",
+        "bs=1M",
+        f"count={int(boot_size) + int(root_size)}"
+    ]
+
+    print(f"Creating disk image: {disk_image_path} size {root_size} MB")
+    subprocess.run(cmd, check=True)
+    print(f"Disk image created at {disk_image_path}")
+    return disk_image_path
+
+
+def setup_loop_device(disk_image_path):
+    print("Cleanup /dev/loopX leftovers")
+    leftovers = ["sudo", "losetup", "-d", "/dev/loop*"]
+    subprocess.run(leftovers, check=False)
+
+    cmd = ["sudo", "losetup", "-fP", "--show", disk_image_path]
+    result = subprocess.run(cmd, check=True, capture_output=True, text=True)
+    loop_device = result.stdout.strip()
+    print(f"Disk image mounted to loop device {loop_device}")
+    return loop_device