Add GitHubCopilotInstallationManager

Author: intitni

Core/Sources/GitHubCopilotService/GitHubCopilotInstallationManager.swift

@@ -0,0 +1,97 @@
+import Foundation
+import Terminal
+
+public struct GitHubCopilotInstallationManager {
+    private static var isInstalling = false
+
+    public init() {}
+
+    public enum InstallationStatus {
+        case notInstalled
+        case installed
+    }
+
+    public func checkInstallation() -> InstallationStatus {
+        guard let urls = try? GitHubCopilotBaseService.createFoldersIfNeeded()
+        else { return .notInstalled }
+        let executableFolderURL = urls.executableURL
+        let binaryURL = executableFolderURL.appendingPathComponent("copilot")
+
+        if !FileManager.default.fileExists(atPath: binaryURL.path) {
+            return .notInstalled
+        }
+
+        return .installed
+    }
+
+    public enum InstallationStep {
+        case downloading
+        case uninstalling
+        case decompressing
+        case done
+    }
+
+    public enum Error: Swift.Error, LocalizedError {
+        case isInstalling
+        case failedToFindLanguageServer
+
+        public var errorDescription: String? {
+            switch self {
+            case .isInstalling:
+                return "Language server is installing."
+            case .failedToFindLanguageServer:
+                return "Failed to find language server. Please open an issue on GitHub."
+            }
+        }
+    }
+
+    public func installLatestVersion() -> AsyncThrowingStream<InstallationStep, Swift.Error> {
+        AsyncThrowingStream<InstallationStep, Swift.Error> { continuation in
+            Task {
+                guard !GitHubCopilotInstallationManager.isInstalling else {
+                    continuation.finish(throwing: Error.isInstalling)
+                    return
+                }
+                GitHubCopilotInstallationManager.isInstalling = true
+                defer { GitHubCopilotInstallationManager.isInstalling = false }
+                do {
+                    continuation.yield(.downloading)
+                    let urls = try GitHubCopilotBaseService.createFoldersIfNeeded()
+                    let executable = Bundle.main.bundleURL.appendingPathComponent("Contents/Applications/CopilotForXcodeExtensionService.app/Contents/Resources/copilot")
+                    print(executable)
+                    guard FileManager.default.fileExists(atPath: executable.path) else {
+                        throw Error.failedToFindLanguageServer
+                    }
+                    
+                    let targetURL = urls.executableURL.appendingPathComponent("copilot")
+
+                    try FileManager.default.copyItem(
+                        at: executable,
+                        to: targetURL
+                    )
+
+                    // update permission 755
+                    try FileManager.default.setAttributes(
+                        [.posixPermissions: 0o755],
+                        ofItemAtPath: targetURL.path
+                    )
+
+                    continuation.yield(.done)
+                    continuation.finish()
+                } catch {
+                    continuation.finish(throwing: error)
+                }
+            }
+        }
+    }
+
+    public func uninstall() async throws {
+        guard let urls = try? GitHubCopilotBaseService.createFoldersIfNeeded()
+        else { return }
+        let executableFolderURL = urls.executableURL
+        let binaryURL = executableFolderURL.appendingPathComponent("copilot")
+        if FileManager.default.fileExists(atPath: binaryURL.path) {
+            try FileManager.default.removeItem(at: binaryURL)
+        }
+    }
+}