feat: pre load schema's utility

frappe_graphql/utils/pre_load_schemas.py

@@ -0,0 +1,24 @@
+def pre_load_schemas():
+    """
+    Can be called in https://docs.gunicorn.org/en/stable/settings.html#pre-fork
+    to pre-load the all sites schema's on all workers.
+    """
+    from frappe.utils import get_sites
+    from frappe import init_site, init, connect, get_installed_apps, destroy
+    with init_site():
+        sites = get_sites()
+
+    for site in sites:
+        import frappe
+        frappe.local.initialised = False
+        init(site=site)
+        connect(site)
+        if "frappe_graphql" not in get_installed_apps():
+            continue
+        try:
+            from frappe_graphql import get_schema
+            get_schema()
+        except Exception:
+            print(f"Failed to build schema for site {site}")
+        finally:
+            destroy()