feat: Static creds resolver (#940)

* Add visibility setting to SwiftSettings.

* ktlint & build errors.

* Limit visibility of generated types that aren't nested within service client.

* Add access level logic to make model-based auth scheme resolver internal even when service isn't rules-based, if service client visibility is internal.

* ktlint

* Codegen changes for constructing & saving IdentityResolvingSTSClient into auth options returned by auth scheme resolver.

* Add back logic for directly nesting auth option constructino in auth option append function if it's noAuth.

* ktlint

* Update codegen test.

* Add forProtocolTests flag to SwiftSettings, to skip auth option customization w/ internal service clients for protocol test codegen.

* Add new setting to SwiftSettings codegen test.

* Move StaticAWSCredentialIdentityResolver off of CRT.

* Add StaticAWSCredentialIdentityResolver type in codegen.

* Remove unnecessary try keyword from StaticAWSCredentialIdentityResolver init() calls.

---------

Co-authored-by: Sichan Yoo <[email protected]>

Author: sichanyoo

Sources/SmithyIdentity/AWSCredentialIdentityResolvers/StaticAWSCredentialIdentityResolver.swift

@@ -5,25 +5,22 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@_spi(AccountIDTempSupport) import class AwsCommonRuntimeKit.CredentialsProvider
+import struct Smithy.Attributes
 
 /// A credential identity resolver that provides a fixed set of credentials
-public struct StaticAWSCredentialIdentityResolver: AWSCredentialIdentityResolvedByCRT {
+public struct StaticAWSCredentialIdentityResolver: AWSCredentialIdentityResolver {
     private let credentials: AWSCredentialIdentity
-    public let crtAWSCredentialIdentityResolver: AwsCommonRuntimeKit.CredentialsProvider
 
     /// Creates a credential identity resolver for a fixed set of credentials
     ///
     /// - Parameter credentials: The credentials that this provider will provide.
     ///
     /// - Returns: A credential identity resolver for a fixed set of credentials
-    public init(_ credentials: AWSCredentialIdentity) throws {
+    public init(_ credentials: AWSCredentialIdentity) {
         self.credentials = credentials
-        self.crtAWSCredentialIdentityResolver = try AwsCommonRuntimeKit.CredentialsProvider(source: .static(
-            accessKey: credentials.accessKey,
-            secret: credentials.secret,
-            sessionToken: credentials.sessionToken,
-            accountId: credentials.accountID
-        ))
+    }
+
+    public func getIdentity(identityProperties: Attributes?) async throws -> AWSCredentialIdentity {
+        return credentials
     }
 }

Sources/SmithyTestUtil/DummyIdentityResolver.swift

@@ -8,7 +8,7 @@
 import struct SmithyIdentity.StaticAWSCredentialIdentityResolver
 
 public func dummyIdentityResolver() throws -> StaticAWSCredentialIdentityResolver {
-    try StaticAWSCredentialIdentityResolver(
+    StaticAWSCredentialIdentityResolver(
         .init(
             accessKey: "dummy-aws-access-key-id",
             secret: "dummy-aws-secret-access-key"

Tests/SmithyIdentityTests/StaticAWSCredentialIdentityResolverTests.swift

@@ -11,7 +11,7 @@ import struct SmithyIdentity.StaticAWSCredentialIdentityResolver
 class StaticAWSCredentialIdentityResolverTests: XCTestCase {
 
     func testGetCredentials() async throws {
-        let subject = try StaticAWSCredentialIdentityResolver(.init(
+        let subject = StaticAWSCredentialIdentityResolver(.init(
             accessKey: "static_access_key",
             secret: "static_secret",
             accountID: "static_account_id"

smithy-swift-codegen/src/main/kotlin/software/amazon/smithy/swift/codegen/swiftmodules/SmithyIdentityTypes.kt

@@ -9,6 +9,7 @@ object SmithyIdentityTypes {
     val BearerTokenIdentityResolver = runtimeSymbol("BearerTokenIdentityResolver", SwiftDeclaration.PROTOCOL)
     val BearerTokenIdentity = runtimeSymbol("BearerTokenIdentity", SwiftDeclaration.STRUCT)
     val StaticBearerTokenIdentityResolver = runtimeSymbol("StaticBearerTokenIdentityResolver", SwiftDeclaration.STRUCT)
+    val StaticAWSCredentialIdentityResolver = runtimeSymbol("StaticAWSCredentialIdentityResolver", SwiftDeclaration.STRUCT)
 }
 
 private fun runtimeSymbol(