Add clippy.toml with forbidden methods & fix SystemTime usages (#2882)

## Motivation and Context
- #2087 

## Description
- remove lingering usages of SystemTime::now()
- ensure they don't return by adding a clippy.toml

## Testing
- CI
- Ran the webassembly example

## Checklist
<!--- If a checkbox below is not applicable, then please DELETE it
rather than leaving it unchecked -->
- [ ] I have updated `CHANGELOG.next.toml` if I made changes to the
smithy-rs codegen or runtime crates
- [ ] I have updated `CHANGELOG.next.toml` if I made changes to the AWS
SDK, generated SDK code, or SDK runtime crates

----

_By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice._

---------

Co-authored-by: John DiSanti <jdisanti@amazon.com>

aws/rust-runtime/aws-config/clippy.toml

@@ -0,0 +1 @@
+../clippy.toml

aws/rust-runtime/aws-inlineable/src/presigning.rs

@@ -147,7 +147,11 @@ impl PresigningConfigBuilder {
             return Err(ErrorKind::ExpiresInDurationTooLong.into());
         }
         Ok(PresigningConfig {
-            start_time: self.start_time.unwrap_or_else(SystemTime::now),
+            start_time: self.start_time.unwrap_or_else(
+                // This usage is OK—customers can easily override this.
+                #[allow(clippy::disallowed_methods)]
+                SystemTime::now,
+            ),
             expires_in,
         })
     }

aws/rust-runtime/aws-runtime/src/request_info.rs

@@ -180,12 +180,14 @@ mod tests {
     use super::RequestInfoInterceptor;
     use crate::request_info::RequestPairs;
     use aws_smithy_http::body::SdkBody;
-    use aws_smithy_runtime_api::client::interceptors::context::{Input, InterceptorContext};
+    use aws_smithy_runtime_api::client::interceptors::context::Input;
+    use aws_smithy_runtime_api::client::interceptors::context::InterceptorContext;
     use aws_smithy_runtime_api::client::interceptors::Interceptor;
     use aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder;
     use aws_smithy_types::config_bag::{ConfigBag, Layer};
     use aws_smithy_types::retry::RetryConfig;
     use aws_smithy_types::timeout::TimeoutConfig;
+
     use http::HeaderValue;
     use std::time::Duration;
 

aws/rust-runtime/aws-runtime/src/service_clock_skew.rs

@@ -10,7 +10,7 @@ use aws_smithy_runtime_api::client::runtime_components::RuntimeComponents;
 use aws_smithy_types::config_bag::{ConfigBag, Storable, StoreReplace};
 use aws_smithy_types::date_time::Format;
 use aws_smithy_types::DateTime;
-use std::time::{Duration, SystemTime};
+use std::time::Duration;
 
 /// Amount of clock skew between the client and the service.
 #[derive(Debug, Clone)]
@@ -72,10 +72,15 @@ impl Interceptor for ServiceClockSkewInterceptor {
     fn modify_before_deserialization(
         &self,
         ctx: &mut BeforeDeserializationInterceptorContextMut<'_>,
-        _runtime_components: &RuntimeComponents,
+        runtime_components: &RuntimeComponents,
         cfg: &mut ConfigBag,
     ) -> Result<(), BoxError> {
-        let time_received = DateTime::from(SystemTime::now());
+        let time_received = DateTime::from(
+            runtime_components
+                .time_source()
+                .ok_or("a time source is required (service clock skew)")?
+                .now(),
+        );
         let time_sent = match extract_time_sent_from_response(ctx) {
             Ok(time_sent) => time_sent,
             Err(e) => {

aws/rust-runtime/aws-sig-auth/src/event_stream.rs

@@ -3,8 +3,9 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-// TODO(enableNewSmithyRuntimeCleanup): Remove this blanket allow once the old implementations are deleted
+// this code is dead
 #![allow(deprecated)]
+#![allow(clippy::disallowed_methods)]
 
 use crate::middleware::Signature;
 use aws_credential_types::Credentials;

aws/rust-runtime/aws-sig-auth/src/lib.rs

@@ -3,6 +3,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+// TODO(enableNewSmithyRuntimeCleanup): Deprecate this crate and replace it with empty contents. Remove references to it in the code generator.
+
 #![allow(clippy::derive_partial_eq_without_eq)]
 
 //! AWS Signature Authentication Package

aws/rust-runtime/clippy.toml

@@ -0,0 +1 @@
+../../clippy-root.toml

aws/sdk-codegen/src/test/kotlin/software/amazon/smithy/rustsdk/EndpointsCredentialsTest.kt

@@ -114,7 +114,7 @@ class EndpointsCredentialsTest {
                             .credentials_provider(#{Credentials}::for_tests())
                             .build();
                         let client = $moduleName::Client::from_conf(conf);
-                        let _ = client.custom_auth().send().await;
+                        let _ = dbg!(client.custom_auth().send().await);
                         let req = rcvr.expect_request();
                         let auth_header = req.headers().get("AUTHORIZATION").unwrap().to_str().unwrap();
                         assert!(auth_header.contains("/region-custom-auth/name-custom-auth/aws4_request"), "{}", auth_header);

aws/sdk-codegen/src/test/kotlin/software/amazon/smithy/rustsdk/InvocationIdDecoratorTest.kt

@@ -41,7 +41,7 @@ class InvocationIdDecoratorTest {
 
                         let client = $moduleName::Client::from_conf(config);
 
-                        let _ = client.some_operation().send().await;
+                        let _ = dbg!(client.some_operation().send().await);
                         let request = rx.expect_request();
                         assert_eq!("custom", request.headers().get("amz-sdk-invocation-id").unwrap());
                     }

aws/sdk-codegen/src/test/kotlin/software/amazon/smithy/rustsdk/TestUtil.kt

@@ -46,6 +46,7 @@ fun awsSdkIntegrationTest(
     clientIntegrationTest(
         model,
         IntegrationTestParams(
+            cargoCommand = "cargo test --features test-util",
             runtimeConfig = AwsTestRuntimeConfig,
             additionalSettings = ObjectNode.builder().withMember(
                 "customizationConfig",

aws/sdk/build.gradle.kts

@@ -338,6 +338,7 @@ tasks.register("generateCargoWorkspace") {
     doFirst {
         outputDir.mkdirs()
         outputDir.resolve("Cargo.toml").writeText(generateCargoWorkspace(awsServices))
+        rootProject.rootDir.resolve("clippy-root.toml").copyTo(outputDir.resolve("clippy.toml"))
     }
     inputs.property("servicelist", awsServices.moduleNames.toString())
     if (awsServices.examples.isNotEmpty()) {
@@ -347,6 +348,7 @@ tasks.register("generateCargoWorkspace") {
         inputs.dir(test.path)
     }
     outputs.file(outputDir.resolve("Cargo.toml"))
+    outputs.file(outputDir.resolve("clippy.toml"))
     outputs.upToDateWhen { false }
 }
 

clippy-root.toml

@@ -0,0 +1,9 @@
+# this file is named `clippy-root.toml` so it isn't picked up automagically. Clippy
+# will search up the filesystem for a clippy.toml and this causes problems with tools.
+disallowed-methods = [
+    # fully qualified function/method name:
+    "std::time::SystemTime::now",
+    "std::time::SystemTime::elapsed",
+    "std::time::Instant::now",
+    "std::time::Instant::elapsed"
+]

codegen-client/src/main/kotlin/software/amazon/smithy/rust/codegen/client/smithy/customizations/TimeSourceCustomization.kt

@@ -23,6 +23,9 @@ class TimeSourceCustomization(codegenContext: ClientCodegenContext) : ConfigCust
     private val codegenScope = arrayOf(
         *preludeScope,
         "SharedTimeSource" to RuntimeType.smithyAsync(codegenContext.runtimeConfig).resolve("time::SharedTimeSource"),
+        "StaticTimeSource" to RuntimeType.smithyAsync(codegenContext.runtimeConfig).resolve("time::StaticTimeSource"),
+        "UNIX_EPOCH" to RuntimeType.std.resolve("time::UNIX_EPOCH"),
+        "Duration" to RuntimeType.std.resolve("time::Duration"),
     )
 
     override fun section(section: ServiceConfig) =
@@ -129,6 +132,18 @@ class TimeSourceCustomization(codegenContext: ClientCodegenContext) : ConfigCust
                     }
                 }
 
+                is ServiceConfig.DefaultForTests -> {
+                    rustTemplate(
+                        """
+                        ${section.configBuilderRef}
+                            .set_time_source(#{Some}(#{SharedTimeSource}::new(
+                                #{StaticTimeSource}::new(#{UNIX_EPOCH} + #{Duration}::from_secs(1234567890)))
+                            ));
+                        """,
+                        *codegenScope,
+                    )
+                }
+
                 else -> emptySection
             }
         }

codegen-core/src/main/kotlin/software/amazon/smithy/rust/codegen/core/testutil/CodegenIntegrationTest.kt

@@ -24,6 +24,7 @@ data class IntegrationTestParams(
     val additionalSettings: ObjectNode = ObjectNode.builder().build(),
     val overrideTestDir: File? = null,
     val command: ((Path) -> Unit)? = null,
+    val cargoCommand: String? = null,
 )
 
 /**
@@ -40,6 +41,6 @@ fun codegenIntegrationTest(model: Model, params: IntegrationTestParams, invokePl
     )
     invokePlugin(ctx)
     ctx.fileManifest.printGeneratedFiles()
-    params.command?.invoke(testDir) ?: "cargo test".runCommand(testDir, environment = mapOf("RUSTFLAGS" to "-D warnings"))
+    params.command?.invoke(testDir) ?: (params.cargoCommand ?: "cargo test").runCommand(testDir, environment = mapOf("RUSTFLAGS" to "-D warnings"))
     return testDir
 }

rust-runtime/aws-smithy-async/src/time.rs

@@ -28,6 +28,8 @@ impl SystemTimeSource {
 
 impl TimeSource for SystemTimeSource {
     fn now(&self) -> SystemTime {
+        // this is the one OK usage
+        #[allow(clippy::disallowed_methods)]
         SystemTime::now()
     }
 }

rust-runtime/clippy.toml

@@ -0,0 +1 @@
+../clippy-root.toml