[perf] Use local schemas if available

linkml_runtime/__init__.py

@@ -25,6 +25,25 @@
 
 MAIN_SCHEMA_PATH = SCHEMA_DIRECTORY / "meta.yaml"
 
+LINKML_ANNOTATIONS = SCHEMA_DIRECTORY / "annotations.yaml"
+LINKML_ARRAY = SCHEMA_DIRECTORY / "array.yaml"
+LINKML_EXTENSIONS = SCHEMA_DIRECTORY / "extensions.yaml"
+LINKML_MAPPINGS = SCHEMA_DIRECTORY / "mappings.yaml"
+LINKML_TYPES = SCHEMA_DIRECTORY / "types.yaml"
+LINKML_UNITS = SCHEMA_DIRECTORY / "units.yaml"
+LINKML_VALIDATION = SCHEMA_DIRECTORY / "validation.yaml"
+
+
+URI_TO_LOCAL = {
+    'https://w3id.org/linkml/annotations.yaml': str(LINKML_ANNOTATIONS),
+    'https://w3id.org/linkml/array.yaml': str(LINKML_ARRAY),
+    'https://w3id.org/linkml/extensions.yaml': str(LINKML_EXTENSIONS),
+    'https://w3id.org/linkml/mappings.yaml': str(LINKML_MAPPINGS),
+    'https://w3id.org/linkml/meta.yaml': str(MAIN_SCHEMA_PATH),
+    'https://w3id.org/linkml/types.yaml': str(LINKML_TYPES),
+    'https://w3id.org/linkml/units.yaml': str(LINKML_UNITS),
+    'https://w3id.org/linkml/validation.yaml': str(LINKML_VALIDATION),
+}
 
 class MappingError(ValueError):
     """

linkml_runtime/loaders/loader_root.py

@@ -1,11 +1,16 @@
 from abc import ABC, abstractmethod
 from typing import TextIO, Union, Optional, Callable, Dict, Type, Any, List
+from logging import getLogger
 
 from pydantic import BaseModel
 from hbreader import FileInfo, hbread
 from jsonasobj2 import as_dict, JsonObj
 
 from linkml_runtime.utils.yamlutils import YAMLRoot
+from linkml_runtime import URI_TO_LOCAL
+
+CACHE_SIZE = 1024
+
 
 
 class Loader(ABC):
@@ -137,6 +142,7 @@
         else:
             return None
 
+
     def _read_source(self,
                      source: Union[str, dict, TextIO], 
                      *, 
@@ -149,8 +155,17 @@
             metadata.base_path = base_dir
 
         if not isinstance(source, dict):
-            data = hbread(source, metadata, metadata.base_path, accept_header)
+            # Try to get local version of schema, if one is known to exist
+            try:
+                if str(source) in URI_TO_LOCAL.keys():
+                    source = str(URI_TO_LOCAL[str(source)])
+            except (TypeError, KeyError) as e:
+                # Fine, use original `source` value
+                logger = getLogger('linkml_runtime.loaders.Loader')
+                logger.debug(f"Error converting stringlike source to local linkml file: {source}, got: {e}")
+
+            data = hbread(source, metadata, base_dir, accept_header)
         else:
             data = source
 
-        return data
+        return data

tests/test_issues/input/issue_1040.yaml

@@ -17,4 +17,4 @@ classes:
   Person:
     in_subset:
        - a
-       -
+       -

tests/test_issues/test_issue_1040.py

@@ -19,4 +19,4 @@ def test_issue_1040_file_name(self):
             trace.  We use this to make sure that the file name gets in correctly.  """
         with self.assertRaises(yaml.constructor.ConstructorError) as e:
             yaml_loader.load(env.input_path('issue_1040.yaml'), SchemaDefinition)
-        self.assertIn('File "issue_1040.yaml"', str(e.exception))
+        self.assertIn('"issue_1040.yaml"', str(e.exception))