Restore mini_copilot/login.py as it is required by auth command

Author: lzwjava

mini_copilot/login.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+import json
+import sys
+import time
+from datetime import datetime, timezone
+from pathlib import Path
+
+import requests
+
+CONFIG_PATH = Path.home() / ".config" / "mini-copilot" / "config.json"
+GITHUB_CLIENT_ID = "01ab8ac9400c4e429b23"  # VSCode's client ID
+
+
+def get_device_code():
+    resp = requests.post(
+        "https://github.com/login/device/code",
+        headers={"Accept": "application/json", "Content-Type": "application/json"},
+        json={"client_id": GITHUB_CLIENT_ID, "scope": "read:user repo"},
+    )
+    resp.raise_for_status()
+    data = resp.json()
+    print(f"\n➡️  Visit: {data['verification_uri']}")
+    print(f"➡️  Enter code: {data['user_code']}\n")
+    return data
+
+
+def poll_for_access_token(device_code, interval=5):
+    while True:
+        time.sleep(interval)
+        resp = requests.post(
+            "https://github.com/login/oauth/access_token",
+            headers={"Accept": "application/json", "Content-Type": "application/json"},
+            json={
+                "client_id": GITHUB_CLIENT_ID,
+                "device_code": device_code,
+                "grant_type": "urn:ietf:params:oauth:grant-type:device_code",
+            },
+        )
+        resp.raise_for_status()
+        data = resp.json()
+
+        if "access_token" in data:
+            print("✅ GitHub OAuth token obtained.")
+            return data["access_token"]
+        elif data.get("error") == "authorization_pending":
+            print("⏳ Waiting for user authorization...", end="\r")
+        elif data.get("error") == "slow_down":
+            interval += 5
+        elif data.get("error") == "expired_token":
+            raise RuntimeError("Device code expired. Please restart.")
+        else:
+            raise RuntimeError(f"OAuth error: {json.dumps(data)}")
+
+
+def main():
+    try:
+        device_data = get_device_code()
+        github_token = poll_for_access_token(
+            device_data["device_code"], device_data.get("interval", 5)
+        )
+
+        config = {
+            "github_token": github_token,
+            "created_at": datetime.now(timezone.utc).isoformat(),
+        }
+
+        CONFIG_PATH.parent.mkdir(parents=True, exist_ok=True)
+        CONFIG_PATH.write_text(json.dumps(config, indent=2))
+        print(f"\n✅ Saved GitHub token to {CONFIG_PATH}")
+        print("🚀 Now you can run 'mini-copilot' to start chatting.")
+    except Exception as e:
+        print(f"\n❌ Error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()