feat: Generate schemas with native-Swift code generator

Package.swift

@@ -303,9 +303,15 @@ let package = Package(
         .executableTarget(
             name: "SmithyCodegenCLI",
             dependencies: [
+                "SmithyCodegenCore",
                 .product(name: "ArgumentParser", package: "swift-argument-parser"),
             ]
         ),
+        .target(
+            name: "SmithyCodegenCore",
+            dependencies: ["SmithySerialization"],
+            resources: [ .process("Resources") ]
+        ),
         .testTarget(
             name: "ClientRuntimeTests",
             dependencies: [
@@ -393,5 +399,9 @@ let package = Package(
             name: "SmithyStreamsTests",
             dependencies: ["SmithyStreams", "Smithy"]
         ),
+        .testTarget(
+            name: "SmithyCodegenCoreTests",
+            dependencies: ["SmithyCodegenCore"]
+        ),
     ].compactMap { $0 }
 )

Sources/ClientRuntime/Config/DefaultSDKRuntimeConfiguration.swift

@@ -13,10 +13,10 @@ import protocol SmithyHTTPAuthAPI.AuthSchemeResolver
 import protocol SmithyHTTPAuthAPI.AuthSchemeResolverParameters
 import struct SmithyRetries.DefaultRetryStrategy
 import struct SmithyRetries.ExponentialBackoffStrategy
-import SmithyTelemetryAPI
 import protocol SmithyRetriesAPI.RetryErrorInfoProvider
 import protocol SmithyRetriesAPI.RetryStrategy
 import struct SmithyRetriesAPI.RetryStrategyOptions
+import SmithyTelemetryAPI
 
 public struct DefaultSDKRuntimeConfiguration<DefaultSDKRuntimeRetryStrategy: RetryStrategy,
     DefaultSDKRuntimeRetryErrorInfoProvider: RetryErrorInfoProvider> {

Sources/ClientRuntime/Networking/Http/CRT/CRTClientEngine.swift

@@ -19,8 +19,8 @@ import protocol SmithyHTTPAPI.HTTPClient
 import class SmithyHTTPAPI.HTTPRequest
 import class SmithyHTTPAPI.HTTPResponse
 import enum SmithyHTTPAPI.HTTPStatusCode
-import class SmithyHTTPClientAPI.HttpTelemetry
 import enum SmithyHTTPClientAPI.HttpMetricsAttributesKeys
+import class SmithyHTTPClientAPI.HttpTelemetry
 import class SmithyStreams.BufferedStream
 import SmithyTelemetryAPI
 #if os(Linux)

Sources/ClientRuntime/Networking/Http/CRT/HTTP2Stream+ByteStream.swift

@@ -8,8 +8,8 @@
 import AwsCommonRuntimeKit
 import struct Smithy.Attributes
 import enum Smithy.ByteStream
-import class SmithyHTTPClientAPI.HttpTelemetry
 import enum SmithyHTTPClientAPI.HttpMetricsAttributesKeys
+import class SmithyHTTPClientAPI.HttpTelemetry
 
 extension HTTP2Stream {
     /// Returns the recommended size, in bytes, for the data to write

Sources/ClientRuntime/Networking/Http/URLSession/FoundationStreamBridge.swift

@@ -13,8 +13,6 @@ import class Foundation.DispatchQueue
 import class Foundation.InputStream
 import class Foundation.NSObject
 import class Foundation.OutputStream
-import class SmithyHTTPClientAPI.HttpTelemetry
-import enum SmithyHTTPClientAPI.HttpMetricsAttributesKeys
 import class Foundation.RunLoop
 import class Foundation.Stream
 import protocol Foundation.StreamDelegate
@@ -24,6 +22,8 @@ import class Foundation.Timer
 import struct Smithy.Attributes
 import protocol Smithy.LogAgent
 import protocol Smithy.ReadableStream
+import enum SmithyHTTPClientAPI.HttpMetricsAttributesKeys
+import class SmithyHTTPClientAPI.HttpTelemetry
 
 /// Reads data from a smithy-swift native `ReadableStream` and streams the data through to a Foundation `InputStream`.
 ///

Sources/ClientRuntime/Networking/Http/URLSession/URLSessionHTTPClient.swift

@@ -18,8 +18,6 @@ import class Foundation.NSRecursiveLock
 import var Foundation.NSURLAuthenticationMethodClientCertificate
 import var Foundation.NSURLAuthenticationMethodServerTrust
 import struct Foundation.TimeInterval
-import class SmithyHTTPClientAPI.HttpTelemetry
-import enum SmithyHTTPClientAPI.HttpMetricsAttributesKeys
 import class Foundation.URLAuthenticationChallenge
 import struct Foundation.URLComponents
 import class Foundation.URLCredential
@@ -29,7 +27,6 @@ import class Foundation.URLResponse
 import class Foundation.URLSession
 import class Foundation.URLSessionConfiguration
 import protocol Foundation.URLSessionDataDelegate
-import SmithyTelemetryAPI
 import class Foundation.URLSessionDataTask
 import class Foundation.URLSessionTask
 import class Foundation.URLSessionTaskMetrics
@@ -44,7 +41,10 @@ import protocol SmithyHTTPAPI.HTTPClient
 import class SmithyHTTPAPI.HTTPRequest
 import class SmithyHTTPAPI.HTTPResponse
 import enum SmithyHTTPAPI.HTTPStatusCode
+import enum SmithyHTTPClientAPI.HttpMetricsAttributesKeys
+import class SmithyHTTPClientAPI.HttpTelemetry
 import class SmithyStreams.BufferedStream
+import SmithyTelemetryAPI
 
 /// A client that can be used to make requests to AWS services using `Foundation`'s `URLSession` HTTP client.
 ///

Sources/SmithyCodegenCLI/SmithyCodegenCLI.swift

@@ -7,6 +7,7 @@
 
 import ArgumentParser
 import Foundation
+import struct SmithyCodegenCore.CodeGenerator
 
 @main
 struct SmithyCodegenCLI: AsyncParsableCommand {
@@ -31,12 +32,8 @@ struct SmithyCodegenCLI: AsyncParsableCommand {
         // If --schemas-path was supplied, create the schema file URL
         let schemasFileURL = resolve(paramName: "--schemas-path", path: schemasPath)
 
-        // All file URLs needed for code generation have now been resolved.
-        // Implement code generation here.
-        if let schemasFileURL {
-            print("Schemas file path: \(schemasFileURL)")
-            FileManager.default.createFile(atPath: schemasFileURL.path, contents: Data())
-        }
+        // Use resolved file URLs to run code generator
+        try CodeGenerator(modelFileURL: modelFileURL, schemasFileURL: schemasFileURL).run()
     }
 
     private func currentWorkingDirectoryFileURL() -> URL {

Sources/SmithyCodegenCore/AST/ASTError.swift

@@ -0,0 +1,14 @@
+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+public struct ASTError: Error {
+    public let localizedDescription: String
+
+    init(_ localizedDescription: String) {
+        self.localizedDescription = localizedDescription
+    }
+}

Sources/SmithyCodegenCore/AST/ASTMember.swift

@@ -0,0 +1,11 @@
+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+struct ASTMember: Decodable {
+    let target: String
+    let traits: [String: ASTNode]?
+}

Sources/SmithyCodegenCore/AST/ASTModel.swift

@@ -0,0 +1,12 @@
+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+struct ASTModel: Decodable {
+    let smithy: String
+    let metadata: ASTNode?
+    let shapes: [String: ASTShape]
+}

Sources/SmithyCodegenCore/AST/ASTNode.swift

@@ -0,0 +1,45 @@
+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+/// Contains the value of a Smithy Node, as used in a JSON AST.
+///
+/// Smithy node data is basically the same as the data that can be stored in JSON.
+/// The root of a Smithy node may be of any type, i.e. unlike JSON, the root element is not limited to object or list.
+///
+/// See the definition of node value in the Smithy spec: https://smithy.io/2.0/spec/model.html#node-values
+enum ASTNode: Sendable {
+    case object([String: ASTNode])
+    case list([ASTNode])
+    case string(String)
+    case number(Double)
+    case boolean(Bool)
+    case null
+}
+
+extension ASTNode: Decodable {
+
+    init(from decoder: any Decoder) throws {
+        let container = try decoder.singleValueContainer()
+        if container.decodeNil() {
+            self = .null
+        } else if let bool = try? container.decode(Bool.self) {
+            self = .boolean(bool)
+        } else if let int = try? container.decode(Int.self) {
+            self = .number(Double(int))
+        } else if let double = try? container.decode(Double.self) {
+            self = .number(double)
+        } else if let string = try? container.decode(String.self) {
+            self = .string(string)
+        } else if let array = try? container.decode([ASTNode].self) {
+            self = .list(array)
+        } else if let dictionary = try? container.decode([String: ASTNode].self) {
+            self = .object(dictionary)
+        } else {
+            throw ASTError("Undecodable value in AST node")
+        }
+    }
+}

Sources/SmithyCodegenCore/AST/ASTReference.swift

@@ -0,0 +1,10 @@
+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+struct ASTReference: Decodable {
+    let target: String
+}

Sources/SmithyCodegenCore/AST/ASTShape.swift

@@ -0,0 +1,31 @@
+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+struct ASTShape: Decodable {
+    let type: ASTType
+    let traits: [String: ASTNode]?
+    let member: ASTMember?
+    let key: ASTMember?
+    let value: ASTMember?
+    let members: [String: ASTMember]?
+    let version: String?
+    let operations: [ASTReference]?
+    let resources: [ASTReference]?
+    let errors: [ASTReference]?
+    let rename: [String: String]?
+    let identifiers: [String: ASTReference]?
+    let properties: [String: ASTReference]?
+    let create: ASTReference?
+    let put: ASTReference?
+    let read: ASTReference?
+    let update: ASTReference?
+    let delete: ASTReference?
+    let list: ASTReference?
+    let collectionOperations: [ASTReference]?
+    let input: ASTReference?
+    let output: ASTReference?
+}

Sources/SmithyCodegenCore/AST/ASTType.swift

@@ -0,0 +1,37 @@
+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+enum ASTType: String, Decodable {
+    // These cases are all the Smithy shape types
+    case blob
+    case boolean
+    case string
+    case timestamp
+    case byte
+    case short
+    case integer
+    case long
+    case float
+    case document
+    case double
+    case bigDecimal
+    case bigInteger
+    case `enum`
+    case intEnum
+    case list
+    case set
+    case map
+    case structure
+    case union
+    case member
+    case service
+    case resource
+    case operation
+
+    // Special for AST, added 'apply' case
+    case apply
+}

Sources/SmithyCodegenCore/CodeGenerator.swift

@@ -0,0 +1,30 @@
+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+import struct Foundation.Data
+import struct Foundation.URL
+
+public struct CodeGenerator {
+    let modelFileURL: URL
+    let schemasFileURL: URL?
+
+    public init(modelFileURL: URL, schemasFileURL: URL?) {
+        self.modelFileURL = modelFileURL
+        self.schemasFileURL = schemasFileURL
+    }
+
+    public func run() throws {
+        // Load the model from the model file
+        let model = try Model(modelFileURL: modelFileURL)
+
+        // If a schema file URL was provided, generate it
+        if let schemasFileURL {
+            let schemaContents = try SmithySchemaCodegen().generate(model: model)
+            try Data(schemaContents.utf8).write(to: schemasFileURL)
+        }
+    }
+}

Sources/SmithyCodegenCore/CodegenError.swift

@@ -0,0 +1,14 @@
+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+struct CodegenError: Error {
+    let localizedDescription: String
+
+    init(_ localizedDescription: String) {
+        self.localizedDescription = localizedDescription
+    }
+}