feat: add script to manage extra subscription links

Introduces a new script `extra_config.py` to manage additional proxy configurations (vmess, vless, ss, trojan) for subscription links.

core/scripts/hysteria2/extra_config.py

@@ -0,0 +1,104 @@
+import json
+import argparse
+import os
+import sys
+from init_paths import *
+from paths import *
+VALID_PROTOCOLS = ("vmess://", "vless://", "ss://", "trojan://")
+
+def read_configs():
+    if not os.path.exists(EXTRA_CONFIG_PATH):
+        return []
+    try:
+        with open(EXTRA_CONFIG_PATH, 'r') as f:
+            content = f.read()
+            if not content:
+                return []
+            return json.loads(content)
+    except (json.JSONDecodeError, IOError):
+        return []
+
+def write_configs(configs):
+    try:
+        os.makedirs(os.path.dirname(EXTRA_CONFIG_PATH), exist_ok=True)
+        with open(EXTRA_CONFIG_PATH, 'w') as f:
+            json.dump(configs, f, indent=4)
+    except IOError as e:
+        print(f"Error writing to {EXTRA_CONFIG_PATH}: {e}", file=sys.stderr)
+        sys.exit(1)
+
+def add_config(name, uri):
+    if not any(uri.startswith(protocol) for protocol in VALID_PROTOCOLS):
+        print(f"Error: Invalid URI. Must start with one of {', '.join(VALID_PROTOCOLS)}", file=sys.stderr)
+        sys.exit(1)
+
+    configs = read_configs()
+    
+    if any(c['name'] == name for c in configs):
+        print(f"Error: A configuration with the name '{name}' already exists.", file=sys.stderr)
+        sys.exit(1)
+
+    configs.append({"name": name, "uri": uri})
+    write_configs(configs)
+    print(f"Successfully added configuration '{name}'.")
+
+def delete_config(name):
+    configs = read_configs()
+    
+    initial_length = len(configs)
+    configs = [c for c in configs if c['name'] != name]
+    
+    if len(configs) == initial_length:
+        print(f"Error: No configuration found with the name '{name}'.", file=sys.stderr)
+        sys.exit(1)
+        
+    write_configs(configs)
+    print(f"Successfully deleted configuration '{name}'.")
+
+def list_configs():
+    configs = read_configs()
+    print(json.dumps(configs, indent=4))
+
+def get_config(name):
+    configs = read_configs()
+    config = next((c for c in configs if c['name'] == name), None)
+    
+    if config:
+        print(json.dumps(config, indent=4))
+    else:
+        print(f"Error: No configuration found with the name '{name}'.", file=sys.stderr)
+        sys.exit(1)
+
+def main():
+    parser = argparse.ArgumentParser(description="Manage extra proxy configurations for subscription links.")
+    subparsers = parser.add_subparsers(dest="command", required=True)
+
+    parser_add = subparsers.add_parser("add", help="Add a new proxy configuration.")
+    parser_add.add_argument("--name", type=str, required=True, help="A unique name for the configuration.")
+    parser_add.add_argument("--uri", type=str, required=True, help="The proxy URI (vmess, vless, ss, trojan).")
+
+    parser_delete = subparsers.add_parser("delete", help="Delete a proxy configuration.")
+    parser_delete.add_argument("--name", type=str, required=True, help="The name of the configuration to delete.")
+    
+    subparsers.add_parser("list", help="List all extra proxy configurations.")
+
+    parser_get = subparsers.add_parser("get", help="Get a specific proxy configuration by name.")
+    parser_get.add_argument("--name", type=str, required=True, help="The name of the configuration to retrieve.")
+    
+    args = parser.parse_args()
+
+    if os.geteuid() != 0:
+        print("This script must be run as root.", file=sys.stderr)
+        sys.exit(1)
+
+    if args.command == "add":
+        add_config(args.name, args.uri)
+    elif args.command == "delete":
+        delete_config(args.name)
+    elif args.command == "list":
+        list_configs()
+    elif args.command == "get":
+        get_config(args.name)
+
+if __name__ == "__main__":
+    main()