utils: Add script to add a new version to GNS3 marketplace

You need first to clone gns3-registry from https://github.com/GNS3/gns3-registry

Follow this steps:
1. ./utils/gns3-marketplace-updater.py 25.08.0 ../../gns3/gns3-registry/appliances/infix.gns3a
2. TEST in gns3, just add the new version, start it.
3. run python3 check.py inside gns3-registry, verify infix is ok.
4. Create a pull request to gns3-registry

This fix #1107

Author: mattiaswal

utils/gns3-marketplace.py

@@ -0,0 +1,91 @@
+#!/usr/bin/env python3
+import argparse
+import hashlib
+import json
+import re
+import shutil
+import sys
+import urllib.request
+from datetime import datetime
+
+BIOS_IMAGE = "OVMF-edk2-stable202305.fd"
+REPO = "https://github.com/kernelkit/infix"
+
+def check_version_format(ver):
+    if not re.fullmatch(r"\d{2}\.\d{2}\.\d+", ver):
+        sys.exit("Error: version must be full form like 25.08.0")
+    return ver
+
+def compute_md5_and_size(url):
+    md5 = hashlib.md5()
+    size = 0
+    with urllib.request.urlopen(url) as resp:
+        while True:
+            chunk = resp.read(1024 * 1024)
+            if not chunk:
+                break
+            md5.update(chunk)
+            size += len(chunk)
+    return md5.hexdigest(), size
+
+def main():
+    parser = argparse.ArgumentParser(description="Add a new Infix version to a GNS3 appliance file")
+    parser.add_argument("version", help="Infix version (e.g. 25.08.0)")
+    parser.add_argument("appliance", help="Path to appliance JSON (.gns3a)")
+    args = parser.parse_args()
+
+    version = check_version_format(args.version)
+    appliance_path = args.appliance
+
+    # Load JSON
+    with open(appliance_path, "r", encoding="utf-8") as f:
+        data = json.load(f)
+
+    # Skip if version already exists
+    for v in data.get("versions", []):
+        if v.get("name") == version:
+            print(f"Version {version} already exists.")
+            return
+
+    # Build qcow2 URL
+    filename = f"infix-x86_64-disk-{version}.qcow2"
+    url = f"{REPO}/releases/download/v{version}/{filename}"
+
+    print(f"Downloading {url} to compute MD5 and size...")
+    md5sum, size = compute_md5_and_size(url)
+
+    # Add image entry
+    image_entry = {
+        "filename": filename,
+        "filesize": size,
+        "md5sum": md5sum,
+        "version": version,
+        "direct_download_url": url
+    }
+    data.setdefault("images", []).append(image_entry)
+
+    # Add version entry (newest first)
+    version_entry = {
+        "name": version,
+        "images": {
+            "bios_image": BIOS_IMAGE,
+            "hda_disk_image": filename
+        }
+    }
+    data.setdefault("versions", []).insert(0, version_entry)
+
+    # Backup
+    backup = appliance_path + ".bak-" + datetime.now().strftime("%Y%m%d-%H%M%S")
+    shutil.copy2(appliance_path, backup)
+
+    # Save updated JSON
+    with open(appliance_path, "w", encoding="utf-8") as f:
+        json.dump(data, f, indent=4)
+
+    print(f"✅ Added version {version}")
+    print(f"   File: {appliance_path}")
+    print(f"   Backup: {backup}")
+    print(f"   Disk: {filename} (size={size} bytes, md5={md5sum})")
+
+if __name__ == "__main__":
+    main()