fix(adk_issue_monitoring_agent): defer GITHUB_TOKEN validation to first HTTP call

Move the ValueError from module import time to the lazy _get_session()
factory so that importing the package (e.g. pytest collection) does not
fail in environments where GITHUB_TOKEN is not set.

Co-authored-by: Atenea Agent <srv_atenea_gitlab@ofidona.net>

Author: ecanlar

contributing/samples/adk_team/adk_issue_monitoring_agent/settings.py

@@ -23,8 +23,6 @@
 
 GITHUB_BASE_URL = "https://api.github.com"
 GITHUB_TOKEN = os.getenv("GITHUB_TOKEN")
-if not GITHUB_TOKEN:
-  raise ValueError("GITHUB_TOKEN environment variable not set")
 
 OWNER = os.getenv("OWNER", "google")
 REPO = os.getenv("REPO", "adk-python")

contributing/samples/adk_team/adk_issue_monitoring_agent/utils.py

@@ -48,24 +48,35 @@ def _increment_api_call_count() -> None:
     allowed_methods=["GET", "DELETE"],
 )
 adapter = HTTPAdapter(max_retries=retry_strategy)
-_session = requests.Session()
-_session.mount("https://", adapter)
-_session.headers.update({
-    "Authorization": f"token {GITHUB_TOKEN}",
-    "Accept": "application/vnd.github.v3+json",
-})
+_session = None
+
+
+def _get_session() -> requests.Session:
+  global _session
+  if _session is not None:
+    return _session
+  if not GITHUB_TOKEN:
+    raise ValueError("GITHUB_TOKEN environment variable not set")
+  session = requests.Session()
+  session.mount("https://", adapter)
+  session.headers.update({
+      "Authorization": f"token {GITHUB_TOKEN}",
+      "Accept": "application/vnd.github.v3+json",
+  })
+  _session = session
+  return _session
 
 
 def get_request(url: str, params: dict[str, Any] | None = None) -> Any:
   _increment_api_call_count()
-  response = _session.get(url, params=params or {}, timeout=60)
+  response = _get_session().get(url, params=params or {}, timeout=60)
   response.raise_for_status()
   return response.json()
 
 
 def post_request(url: str, payload: Any) -> Any:
   _increment_api_call_count()
-  response = _session.post(url, json=payload, timeout=60)
+  response = _get_session().post(url, json=payload, timeout=60)
   response.raise_for_status()
   return response.json()