Fixes iOS 18+ runtime downloads

Sources/XcodesKit/RuntimeInstaller.swift

@@ -38,9 +38,6 @@ public class RuntimeInstaller {
             }
         }
 
-
-
-
         installed.forEach { runtime in
             let resolvedBetaNumber = downloadablesResponse.sdkToSeedMappings.first {
                 $0.buildUpdate == runtime.build
@@ -102,22 +99,27 @@ public class RuntimeInstaller {
     public func downloadAndInstallRuntime(identifier: String, to destinationDirectory: Path, with downloader: Downloader, shouldDelete: Bool) async throws {
         let matchedRuntime = try await getMatchingRuntime(identifier: identifier)
 
-        if matchedRuntime.contentType == .package && !Current.shell.isRoot() {
-            throw Error.rootNeeded
+        let deleteIfNeeded: (URL) -> Void = { dmgUrl in
+            if shouldDelete {
+                Current.logging.log("Deleting Archive")
+                try? Current.files.removeItem(at: dmgUrl)
+            }
         }
 
-        let dmgUrl = try await downloadOrUseExistingArchive(runtime: matchedRuntime, to: destinationDirectory, downloader: downloader)
         switch matchedRuntime.contentType {
-            case .package:
-                try await installFromPackage(dmgUrl: dmgUrl, runtime: matchedRuntime)
-            case .diskImage:
-                try await installFromImage(dmgUrl: dmgUrl)
-            case .cryptexDiskImage:
-                throw Error.unsupportedCryptexDiskImage
-        }
-        if shouldDelete {
-            Current.logging.log("Deleting Archive")
-            try? Current.files.removeItem(at: dmgUrl)
+        case .package:
+            guard Current.shell.isRoot() else {
+                throw Error.rootNeeded
+            }
+            let dmgUrl = try await downloadOrUseExistingArchive(runtime: matchedRuntime, to: destinationDirectory, downloader: downloader)
+            try await installFromPackage(dmgUrl: dmgUrl, runtime: matchedRuntime)
+			deleteIfNeeded(dmgUrl)
+        case .diskImage:
+            let dmgUrl = try await downloadOrUseExistingArchive(runtime: matchedRuntime, to: destinationDirectory, downloader: downloader)
+            try await installFromImage(dmgUrl: dmgUrl)
+			deleteIfNeeded(dmgUrl)
+        case .cryptexDiskImage:
+            try await downloadAndInstallUsingXcodeBuild(runtime: matchedRuntime)
         }
     }
 
@@ -224,6 +226,124 @@ public class RuntimeInstaller {
         destination.setCurrentUserAsOwner()
         return result
     }
+
+    // MARK: Xcode 16.1 Runtime installation helpers
+    /// Downloads and installs the runtime using xcodebuild, requires Xcode 16.1+ to download a runtime using a given directory
+    /// - Parameters:
+    ///   - runtime: The runtime to download and install to identify the platform and version numbers
+    private func downloadAndInstallUsingXcodeBuild(runtime: DownloadableRuntime) async throws {
+
+        // Make sure that we are using a version of xcode that supports this
+        try await ensureSelectedXcodeVersionForDownload()
+
+        // Kick off the download/install process and get an async stream of the progress
+        let downloadStream = createXcodebuildDownloadStream(runtime: runtime)
+
+        // Observe the progress and update the console from it
+        for try await progress in downloadStream {
+            let formatter = NumberFormatter(numberStyle: .percent)
+            guard Current.shell.isatty() else { return }
+            // These escape codes move up a line and then clear to the end
+            Current.logging.log("\u{1B}[1A\u{1B}[KDownloading Runtime \(runtime.visibleIdentifier): \(formatter.string(from: progress.fractionCompleted)!)")
+        }
+    }
+
+    /// Checks the existing `xcodebuild -version` to ensure that the version is appropriate to use for downloading the cryptex style 16.1+ downloads
+    /// otherwise will throw an error
+    private func ensureSelectedXcodeVersionForDownload() async throws {
+        let xcodeBuildPath = Path.root.usr.bin.join("xcodebuild")
+        let versionString = try await Process.run(xcodeBuildPath, "-version").async()
+        let versionPattern = #"Xcode (\d+\.\d+)"#
+        let versionRegex = try NSRegularExpression(pattern: versionPattern)
+
+        // parse out the version string (e.g. 16.1) from the xcodebuild version command and convert it to a `Version`
+        guard let match = versionRegex.firstMatch(in: versionString.out, range: NSRange(versionString.out.startIndex..., in: versionString.out)),
+           let versionRange = Range(match.range(at: 1), in: versionString.out),
+           let version = Version(tolerant: String(versionString.out[versionRange])) else {
+            throw Error.noXcodeSelectedFound
+        }
+
+        // actually compare the version against version 16.1 to ensure it's equal or greater
+        guard version >= Version(16, 1, 0) else {
+            throw Error.xcode16_1OrGreaterRequired(version)
+        }
+
+        // If we made it here, we're gucci and 16.1 or greater is selected
+    }
+
+    // Creates and invokes the xcodebuild install command and converts it to a stream of Progress
+    private func createXcodebuildDownloadStream(runtime: DownloadableRuntime) -> AsyncThrowingStream<Progress, Swift.Error> {
+        let platform = runtime.platform.shortName
+        let version = runtime.simulatorVersion.buildUpdate
+
+        return AsyncThrowingStream<Progress, Swift.Error> { continuation in
+            Task {
+                // Assume progress will not have data races, so we manually opt-out isolation checks.
+                let progress = Progress()
+                progress.kind = .file
+                progress.fileOperationKind = .downloading
+
+                let process = Process()
+                let xcodeBuildPath = Path.root.usr.bin.join("xcodebuild").url
+
+                process.executableURL = xcodeBuildPath
+                process.arguments = [
+                    "-downloadPlatform",
+                    "\(platform)",
+                    "-buildVersion",
+                    "\(version)"
+                ]
+
+                let stdOutPipe = Pipe()
+                process.standardOutput = stdOutPipe
+                let stdErrPipe = Pipe()
+                process.standardError = stdErrPipe
+
+                let observer = NotificationCenter.default.addObserver(
+                    forName: .NSFileHandleDataAvailable,
+                    object: nil,
+                    queue: OperationQueue.main
+                ) { note in
+                    guard
+                        // This should always be the case for Notification.Name.NSFileHandleDataAvailable
+                        let handle = note.object as? FileHandle,
+                        handle === stdOutPipe.fileHandleForReading || handle === stdErrPipe.fileHandleForReading
+                    else { return }
+
+                    defer { handle.waitForDataInBackgroundAndNotify() }
+
+                    let string = String(decoding: handle.availableData, as: UTF8.self)
+                    progress.updateFromXcodebuild(text: string)
+                    continuation.yield(progress)
+                }
+
+                stdOutPipe.fileHandleForReading.waitForDataInBackgroundAndNotify()
+                stdErrPipe.fileHandleForReading.waitForDataInBackgroundAndNotify()
+
+                continuation.onTermination = { @Sendable _ in
+                    process.terminate()
+                    NotificationCenter.default.removeObserver(observer, name: .NSFileHandleDataAvailable, object: nil)
+                }
+
+                do {
+                    try process.run()
+                } catch {
+                    continuation.finish(throwing: error)
+                }
+
+                process.waitUntilExit()
+
+                NotificationCenter.default.removeObserver(observer, name: .NSFileHandleDataAvailable, object: nil)
+
+                guard process.terminationReason == .exit, process.terminationStatus == 0 else {
+                    struct ProcessExecutionError: Swift.Error {}
+                    continuation.finish(throwing: ProcessExecutionError())
+                    return
+                }
+                continuation.finish()
+            }
+        }
+    }
 }
 
 extension RuntimeInstaller {
@@ -232,7 +352,8 @@ extension RuntimeInstaller {
         case failedMountingDMG
         case rootNeeded
         case missingRuntimeSource(String)
-        case unsupportedCryptexDiskImage
+        case xcode16_1OrGreaterRequired(Version)
+        case noXcodeSelectedFound
 
         public var errorDescription: String? {
             switch self {
@@ -243,9 +364,11 @@ extension RuntimeInstaller {
                 case .rootNeeded:
                     return "Must be run as root to install the specified runtime"
                 case let .missingRuntimeSource(identifier):
-                    return "Runtime \(identifier) is missing source url. Downloading of iOS 18 runtimes are not supported. Please install manually see https://developer.apple.com/documentation/xcode/installing-additional-simulator-runtimes"
-                case .unsupportedCryptexDiskImage:
-                    return "Cryptex Disk Image is not yet supported."
+                    return "Runtime \(identifier) is missing source url. Downloading of iOS 18 runtimes are only supported using Xcode 16.1+ and can only be installed, not just downloaded."
+                case let .xcode16_1OrGreaterRequired(version):
+                    return "Installing this runtime requires Xcode 16.1 or greater to be selected, but is currently \(version.description)"
+                case .noXcodeSelectedFound:
+                    return "No Xcode is currently selected, please make sure that you have one selected and installed before trying to install this runtime"
             }
         }
     }
@@ -294,3 +417,39 @@ extension Array {
         return result
     }
 }
+
+
+private extension Progress {
+    func updateFromXcodebuild(text: String) {
+        self.totalUnitCount = 100
+        self.completedUnitCount = 0
+        self.localizedAdditionalDescription = "" // to not show the addtional
+
+        do {
+
+            let downloadPattern = #"(\d+\.\d+)% \(([\d.]+ (?:MB|GB)) of ([\d.]+ GB)\)"#
+            let downloadRegex = try NSRegularExpression(pattern: downloadPattern)
+
+            // Search for matches in the text
+            if let match = downloadRegex.firstMatch(in: text, range: NSRange(text.startIndex..., in: text)) {
+                // Extract the percentage - simpler then trying to extract size MB/GB and convert to bytes.
+                if let percentRange = Range(match.range(at: 1), in: text), let percentDouble = Double(text[percentRange]) {
+                    let percent = Int64(percentDouble.rounded())
+                    self.completedUnitCount = percent
+                }
+            }
+
+            // "Downloading tvOS 18.1 Simulator (22J5567a): Installing..." or
+            // "Downloading tvOS 18.1 Simulator (22J5567a): Installing (registering download)..."
+            if text.range(of: "Installing") != nil {
+                // sets the progress to indeterminite to show animating progress
+                self.totalUnitCount = 0
+                self.completedUnitCount = 0
+            }
+
+        } catch {
+            print("Invalid regular expression")
+        }
+
+    }
+}