A session generator helper to create a telegram session.

.dockerignore

@@ -51,3 +51,5 @@ telethon_session.session-journal
 session_name.session
 session_name.session-journal
 session.session
+
+session_generator.py

session_generator.py

@@ -0,0 +1,38 @@
+import os
+from telethon import TelegramClient
+
+API_ID = int(os.environ.get("TG_API_ID", "0"))
+API_HASH = os.environ.get("TG_API_HASH", "")
+SESSION_PREFIX = os.environ.get("TG_SESSION", "telethon_session")  # writes <prefix>.session in cwd
+
+def _prompt_nonempty(prompt: str, default: str | None = None) -> str:
+    while True:
+        val = input(f"{prompt}{f' [{default}]' if default else ''}: ").strip()
+        if not val and default is not None:
+            return default
+        if val:
+            return val
+        print("Please enter a value.")
+
+def main():
+    # If env vars are missing, ask interactively.
+    global API_ID, API_HASH, SESSION_PREFIX
+    if not API_ID:
+        api_id_str = _prompt_nonempty("Enter TG_API_ID (from my.telegram.org)")
+        try:
+            API_ID = int(api_id_str)
+        except ValueError:
+            raise SystemExit("TG_API_ID must be an integer.")
+    if not API_HASH:
+        API_HASH = _prompt_nonempty("Enter TG_API_HASH (from my.telegram.org)")
+    if not SESSION_PREFIX:
+        SESSION_PREFIX = _prompt_nonempty("Enter session prefix (file will be <prefix>.session)", "telethon_session")
+
+    client = TelegramClient(SESSION_PREFIX, API_ID, API_HASH)
+    client.start()  # this will prompt for phone, code, and 2FA if needed
+    print(f"Session created: {SESSION_PREFIX}.session")
+    client.disconnect()
+
+
+if __name__ == "__main__":
+    main()