OLS-1980: Add autodiscovery for indexID value

Author: syedriko

ols/app/models/config.py

@@ -874,7 +874,6 @@ def validate_yaml(self) -> None:
         """Validate reference content index config."""
         if self.product_docs_index_path is not None:
             try:
-                fallback_to_default = False
                 checks.dir_check(
                     self.product_docs_index_path, "Reference content index path"
                 )
@@ -887,22 +886,16 @@ def validate_yaml(self) -> None:
                 try:
                     checks.dir_check(default_path, "Reference content index path")
                     self.product_docs_index_path = FilePath(default_path)
-                    # load all index in the default path
+                    # we don't know the index_id for "latest" so ignore what
+                    # the config says and load whatever index is there
                     self.product_docs_index_id = None
-                    fallback_to_default = True
                 except checks.InvalidConfigurationError:
                     raise e_original
-            if self.product_docs_index_id is None and not fallback_to_default:
+        else:
+            if self.product_docs_index_id is not None:
                 raise checks.InvalidConfigurationError(
-                    "product_docs_index_path is specified but product_docs_index_id is missing"
+                    "product_docs_index_id is specified but product_docs_index_path is missing"
                 )
-        if (
-            self.product_docs_index_id is not None
-            and self.product_docs_index_path is None
-        ):
-            raise checks.InvalidConfigurationError(
-                "product_docs_index_id is specified but product_docs_index_path is missing"
-            )
 
 
 class ReferenceContent(BaseModel):

tests/unit/app/models/test_config.py

@@ -1,11 +1,13 @@
 """Unit tests for data models."""
 
 import copy
+import errno
 import logging
 import os
 
 import pytest
 from pydantic import ValidationError
+from unittest import mock
 
 import ols.utils.tls as tls
 from ols import constants
@@ -2928,14 +2930,19 @@ def test_reference_content_index_yaml_validation():
     # should not raise an exception
     reference_content_index.validate_yaml()
 
-    # existing docs index path with set up product ID
+    # existing docs index path with set up index ID
     reference_content_index.product_docs_index_path = "."
     reference_content_index.product_docs_index_id = "foo"
     reference_content_index.validate_yaml()
 
-    # existing docs index path, but no product ID
+    # existing docs index path, but no index ID
     reference_content_index.product_docs_index_path = "."
     reference_content_index.product_docs_index_id = None
+    reference_content_index.validate_yaml()
+
+    # no docs index path, but with index id
+    reference_content_index.product_docs_index_path = None
+    reference_content_index.product_docs_index_id = "foo"
     with pytest.raises(InvalidConfigurationError):
         reference_content_index.validate_yaml()
 
@@ -2952,9 +2959,10 @@ def test_reference_content_index_yaml_validation():
 
     # docs index point to a proper directory, that is not
     # readable by the service
-    reference_content_index.product_docs_index_path = "/root"
-    with pytest.raises(InvalidConfigurationError):
-        reference_content_index.validate_yaml()
+    with mock.patch("os.stat", side_effect=PermissionError(errno.EACCES, "Permission denied")):
+        reference_content_index.product_docs_index_path = "/root"
+        with pytest.raises(InvalidConfigurationError):
+            reference_content_index.validate_yaml()
 
 
 def test_reference_content_constructor():

tests/unit/utils/test_config.py

@@ -544,34 +544,6 @@ def test_invalid_config_improper_reference_content():
     check_expected_exception(
         """
 ---
-llm_providers:
-  - name: p1
-    type: bam
-    credentials_path: tests/config/secret/apitoken
-    models:
-      - name: m1
-        credentials_path: tests/config/secret/apitoken
-ols_config:
-  reference_content:
-    indexes:
-    - product_docs_index_path: "/tmp"
-  conversation_cache:
-    type: memory
-    memory:
-      max_entries: 1000
-dev_config:
-  temperature_override: 0.1
-  enable_dev_ui: true
-  disable_auth: false
-
-""",
-        InvalidConfigurationError,
-        "product_docs_index_path is specified but product_docs_index_id is missing",
-    )
-
-    check_expected_exception(
-        """
----
 llm_providers:
   - name: p1
     type: bam