Adopt OpenAPI for fetching current swiftly releases

Use the OpenAPI specification for the swift.org API and the
swift OpenAPI generation capabilities to avoid having to hand
craft the HTTP handling and local data types.

Author: cmcgee1024

Package.resolved

@@ -15,10 +15,13 @@ let package = Package(
     ],
     dependencies: [
         .package(url: "https://github.com/apple/swift-argument-parser", from: "1.3.0"),
-        .package(url: "https://github.com/swift-server/async-http-client", from: "1.21.2"),
-        .package(url: "https://github.com/apple/swift-nio.git", from: "2.64.0"),
+        .package(url: "https://github.com/swift-server/async-http-client", from: "1.24.0"),
+        .package(url: "https://github.com/swift-server/swift-openapi-async-http-client", from: "1.1.0"),
+        .package(url: "https://github.com/apple/swift-nio.git", from: "2.79.0"),
         .package(url: "https://github.com/apple/swift-tools-support-core.git", from: "0.7.2"),
         .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.3.0"),
+        .package(url: "https://github.com/apple/swift-openapi-generator", from: "1.6.0"),
+        .package(url: "https://github.com/apple/swift-openapi-runtime", from: "1.7.0"),
         // This dependency provides the correct version of the formatter so that you can run `swift run swiftformat Package.swift Plugins/ Sources/ Tests/`
         .package(url: "https://github.com/nicklockwood/SwiftFormat", exact: "0.49.18"),
     ],
@@ -38,6 +41,11 @@ let package = Package(
             dependencies: [
                 .product(name: "AsyncHTTPClient", package: "async-http-client"),
                 .product(name: "NIOFoundationCompat", package: "swift-nio"),
+                .product(name: "OpenAPIRuntime", package: "swift-openapi-runtime"),
+                .product(name: "OpenAPIAsyncHTTPClient", package: "swift-openapi-async-http-client"),
+            ],
+            plugins: [
+                .plugin(name: "OpenAPIGenerator", package: "swift-openapi-generator"),
             ]
         ),
         .target(

Package.swift

@@ -69,7 +69,7 @@ public struct Linux: Platform {
             You can install the ca-certificates package on your system to fix this.
             """
 
-            throw Error(message: msg)
+            throw SwiftlyError(message: msg)
         }
     }
 
@@ -258,7 +258,7 @@ public struct Linux: Platform {
                 }
                 msg += "\n" + Self.skipVerificationMessage
 
-                throw Error(message: msg)
+                throw SwiftlyError(message: msg)
             }
 
             // Import the latest swift keys, but only once per session, which will help with the performance in tests
@@ -270,7 +270,7 @@ public struct Linux: Platform {
                 }
 
                 guard let url = URL(string: "https://www.swift.org/keys/all-keys.asc") else {
-                    throw Error(message: "malformed URL to the swift gpg keys")
+                    throw SwiftlyError(message: "malformed URL to the swift gpg keys")
                 }
 
                 try await httpClient.downloadFile(url: url, to: tmpFile)
@@ -329,7 +329,7 @@ public struct Linux: Platform {
 
     public func install(from tmpFile: URL, version: ToolchainVersion, verbose: Bool) throws {
         guard tmpFile.fileExists() else {
-            throw Error(message: "\(tmpFile) doesn't exist")
+            throw SwiftlyError(message: "\(tmpFile) doesn't exist")
         }
 
         if !self.swiftlyToolchainsDir.fileExists() {
@@ -361,7 +361,7 @@ public struct Linux: Platform {
 
     public func extractSwiftlyAndInstall(from archive: URL) throws {
         guard archive.fileExists() else {
-            throw Error(message: "\(archive) doesn't exist")
+            throw SwiftlyError(message: "\(archive) doesn't exist")
         }
 
         let tmpDir = self.getTempFilePath()
@@ -414,7 +414,7 @@ public struct Linux: Platform {
         do {
             try self.runProgram("gpg", "--verify", sigFile.path, archive.path, quiet: !verbose)
         } catch {
-            throw Error(message: "Signature verification failed: \(error).")
+            throw SwiftlyError(message: "Signature verification failed: \(error).")
         }
     }
 
@@ -471,7 +471,7 @@ public struct Linux: Platform {
         guard let releaseFile = releaseFile else {
             let message = "Unable to detect the type of Linux OS and the release"
             if disableConfirmation {
-                throw Error(message: message)
+                throw SwiftlyError(message: message)
             } else {
                 print(message)
             }
@@ -498,7 +498,7 @@ public struct Linux: Platform {
         guard let id, let versionID else {
             let message = "Unable to find release information from file \(releaseFile)"
             if disableConfirmation {
-                throw Error(message: message)
+                throw SwiftlyError(message: message)
             } else {
                 print(message)
             }
@@ -509,7 +509,7 @@ public struct Linux: Platform {
             guard versionID == "2" else {
                 let message = "Unsupported version of Amazon Linux"
                 if disableConfirmation {
-                    throw Error(message: message)
+                    throw SwiftlyError(message: message)
                 } else {
                     print(message)
                 }
@@ -521,7 +521,7 @@ public struct Linux: Platform {
             guard versionID.hasPrefix("9") else {
                 let message = "Unsupported version of RHEL"
                 if disableConfirmation {
-                    throw Error(message: message)
+                    throw SwiftlyError(message: message)
                 } else {
                     print(message)
                 }
@@ -535,7 +535,7 @@ public struct Linux: Platform {
 
         let message = "Unsupported Linux platform"
         if disableConfirmation {
-            throw Error(message: message)
+            throw SwiftlyError(message: message)
         } else {
             print(message)
         }

Sources/LinuxPlatform/Linux.swift

@@ -51,7 +51,7 @@ public struct MacOS: Platform {
 
     public func install(from tmpFile: URL, version: ToolchainVersion, verbose: Bool) throws {
         guard tmpFile.fileExists() else {
-            throw Error(message: "\(tmpFile) doesn't exist")
+            throw SwiftlyError(message: "\(tmpFile) doesn't exist")
         }
 
         if !self.swiftlyToolchainsDir.fileExists() {
@@ -85,7 +85,7 @@ public struct MacOS: Platform {
 
     public func extractSwiftlyAndInstall(from archive: URL) throws {
         guard archive.fileExists() else {
-            throw Error(message: "\(archive) doesn't exist")
+            throw SwiftlyError(message: "\(archive) doesn't exist")
         }
 
         let homeDir: URL
@@ -111,7 +111,7 @@ public struct MacOS: Platform {
             // and the ones that are mocked here in the test framework.
             let payload = tmpDir.appendingPathComponent("Payload")
             guard payload.fileExists() else {
-                throw Error(message: "Payload file could not be found at \(tmpDir).")
+                throw SwiftlyError(message: "Payload file could not be found at \(tmpDir).")
             }
 
             try runProgram("tar", "-C", installDir.path, "-xf", payload.path)
@@ -128,11 +128,11 @@ public struct MacOS: Platform {
         let decoder = PropertyListDecoder()
         let infoPlist = toolchainDir.appendingPathComponent("Info.plist")
         guard let data = try? Data(contentsOf: infoPlist) else {
-            throw Error(message: "could not open \(infoPlist)")
+            throw SwiftlyError(message: "could not open \(infoPlist)")
         }
 
         guard let pkgInfo = try? decoder.decode(SwiftPkgInfo.self, from: data) else {
-            throw Error(message: "could not decode plist at \(infoPlist)")
+            throw SwiftlyError(message: "could not decode plist at \(infoPlist)")
         }
 
         try FileManager.default.removeItem(at: toolchainDir)

Sources/MacOSPlatform/MacOS.swift

@@ -40,7 +40,7 @@ public struct Config: Codable, Equatable {
 
             To begin using swiftly you can install it: '\(CommandLine.arguments[0]) init'.
             """
-            throw Error(message: msg)
+            throw SwiftlyError(message: msg)
         }
     }