CODEX revised with following function: 1. GDS building, 2. different user group with different authority.

backend/pdk_access.py

@@ -0,0 +1,60 @@
+import os
+import time
+import shutil
+import uuid
+
+
+MANAGER_GROUP = "manager"
+DEVELOPER_GROUP = "developers"
+USER_GROUP = "user"
+ALLOWED_GROUPS = {MANAGER_GROUP, DEVELOPER_GROUP, USER_GROUP}
+
+
+def normalize_user_group(user_group: str) -> str:
+    group = (user_group or USER_GROUP).strip().lower()
+    return group if group in ALLOWED_GROUPS else USER_GROUP
+
+
+def pdk_root_for_group(user_group: str, repo_root: str) -> str:
+    group = normalize_user_group(user_group)
+    if group == MANAGER_GROUP:
+        return os.path.abspath(os.environ.get(
+            "MXPIC_PDK_ATLAS_ROOT",
+            os.path.join(repo_root, "opt_pdk_atlas", "foundries"),
+        ))
+    return os.path.abspath(os.environ.get(
+        "MXPIC_PDK_PUBLIC_ROOT",
+        os.path.join(repo_root, "opt_pdk_public", "foundries"),
+    ))
+
+
+def pdk_root_for_session(session_obj, repo_root: str) -> str:
+    return pdk_root_for_group(session_obj.get("user_group"), repo_root)
+
+
+def prefer_full_gds_for_session(session_obj) -> bool:
+    return normalize_user_group(session_obj.get("user_group")) == MANAGER_GROUP
+
+
+def create_export_path(export_root: str, project_name: str) -> tuple[str, str, str]:
+    export_id = uuid.uuid4().hex
+    filename = f"{project_name}.gds"
+    export_dir = os.path.abspath(os.path.join(export_root, export_id))
+    os.makedirs(export_dir, exist_ok=True)
+    return export_id, filename, os.path.join(export_dir, filename)
+
+
+def cleanup_expired_exports(export_root: str, max_age_seconds: int = 86400) -> None:
+    if not os.path.isdir(export_root):
+        return
+    now = time.time()
+    for name in os.listdir(export_root):
+        path = os.path.join(export_root, name)
+        if not os.path.isdir(path):
+            continue
+        try:
+            age = now - os.path.getmtime(path)
+            if age > max_age_seconds:
+                shutil.rmtree(path, ignore_errors=True)
+        except OSError:
+            continue