test(wkt): integration tests use generated types

Use generated types for the custom encoding / decoding of primitive
types. This makes the tests more realistic.

This change uses `include!()` because it needed to inject an alias for
`wkt` and changing the generator seemed hard. Unfortunately this also
means the generated code is recompiled in each test, I think we can fix
that later if it becomes annoying. It does not affect customers as it
is isolated to tests.

The generator changes and the corresponding changes in the generated
code are to support overrides in the `#![allow(...)]` attributes. I
needed to set them for this module, and they were hard-coded in
`mod.rs.mustache` (but not other templates).

Author: coryan

generator/internal/rust/codec.go

@@ -111,7 +111,11 @@ func newCodec(protobufSource bool, options map[string]string) (*codec, error) {
 				codec.packageMapping[source] = pkgOption.pkg
 			}
 		case key == "disabled-rustdoc-warnings":
-			codec.disabledRustdocWarnings = strings.Split(definition, ",")
+			if definition == "" {
+				codec.disabledRustdocWarnings = []string{}
+			} else {
+				codec.disabledRustdocWarnings = strings.Split(definition, ",")
+			}
 		case key == "template-override":
 			codec.templateOverride = definition
 		case key == "include-grpc-only-methods":

generator/internal/rust/templates/mod/mod.rs.mustache

@@ -18,10 +18,9 @@ limitations under the License.
 //{{{.}}}
 {{/Codec.BoilerPlate}}
 
-{{! Google APIs often use angle brackets for <PLACEHOLDERS>, rustdoc does not like those. }}
-#![allow(rustdoc::invalid_html_tags)]
-{{! We use explicit links because it is easier to generate the code with them. }}
-#![allow(rustdoc::redundant_explicit_links)]
+{{#Codec.DisabledRustdocWarnings}}
+#![allow(rustdoc::{{.}})]
+{{/Codec.DisabledRustdocWarnings}}
 {{#Codec.IsWktCrate}}
 {{!
 This file is used to bootstrap the `google-cloud-wkt` crate. In all other crates

src/firestore/src/generated/gapic/model.rs

@@ -14,8 +14,8 @@
 //
 // Code generated by sidekick. DO NOT EDIT.
 
-#![allow(rustdoc::invalid_html_tags)]
 #![allow(rustdoc::redundant_explicit_links)]
+#![allow(rustdoc::broken_intra_doc_links)]
 
 /// The result of a single bucket from a Firestore aggregation query.
 ///

src/protojson-conformance/src/generated/gapic/model.rs

@@ -14,8 +14,8 @@
 //
 // Code generated by sidekick. DO NOT EDIT.
 
-#![allow(rustdoc::invalid_html_tags)]
 #![allow(rustdoc::redundant_explicit_links)]
+#![allow(rustdoc::broken_intra_doc_links)]
 
 /// Meant to encapsulate all types of tests: successes, skips, failures, etc.
 /// Therefore, this may or may not have a failure message. Failure messages

src/protojson-conformance/src/generated/test_protos/mod.rs

@@ -14,8 +14,8 @@
 //
 // Code generated by sidekick. DO NOT EDIT.
 
-#![allow(rustdoc::invalid_html_tags)]
 #![allow(rustdoc::redundant_explicit_links)]
+#![allow(rustdoc::broken_intra_doc_links)]
 
 /// This proto includes every type of field in both singular and repeated
 /// forms.

src/storage-control/src/generated/gapic/model.rs

@@ -14,8 +14,8 @@
 //
 // Code generated by sidekick. DO NOT EDIT.
 
-#![allow(rustdoc::invalid_html_tags)]
 #![allow(rustdoc::redundant_explicit_links)]
+#![allow(rustdoc::broken_intra_doc_links)]
 
 /// Request message for DeleteBucket.
 #[serde_with::serde_as]

src/storage-control/src/generated/gapic_control/model.rs

@@ -14,8 +14,8 @@
 //
 // Code generated by sidekick. DO NOT EDIT.
 
-#![allow(rustdoc::invalid_html_tags)]
 #![allow(rustdoc::redundant_explicit_links)]
+#![allow(rustdoc::broken_intra_doc_links)]
 
 /// Contains information about a pending rename operation.
 #[serde_with::serde_as]

src/wkt/src/generated/mod.rs

@@ -14,8 +14,8 @@
 //
 // Code generated by sidekick. DO NOT EDIT.
 
-#![allow(rustdoc::invalid_html_tags)]
 #![allow(rustdoc::redundant_explicit_links)]
+#![allow(rustdoc::broken_intra_doc_links)]
 use crate as wkt;
 
 /// Api is a light-weight descriptor for an API Interface.

src/wkt/tests/generated/.sidekick.toml

@@ -0,0 +1,26 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[general]
+specification-source = 'src/wkt/tests/generated'
+
+[source]
+roots        = 'project'
+project-root = '.'
+
+[codec]
+copyright-year            = '2025'
+template-override         = 'templates/mod'
+module-path               = 'crate::protos'
+disabled-rustdoc-warnings = ''