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| 1 | +import Foundation |
| 2 | +import JSONRPC |
| 3 | +import LanguageClient |
| 4 | +import LanguageServerProtocol |
| 5 | +import Logger |
| 6 | + |
| 7 | +protocol CodeiumLSP { |
| 8 | + func sendRequest<E: CodeiumRequestType>(_ endpoint: E) async throws -> E.Response |
| 9 | +} |
| 10 | + |
| 11 | +final class CodeiumLanguageServer { |
| 12 | + let languageServerExecutableURL: URL |
| 13 | + let managerDirectoryURL: URL |
| 14 | + let supportURL: URL |
| 15 | + let process: Process |
| 16 | + let transport: IOTransport |
| 17 | + var terminationHandler: (() -> Void)? |
| 18 | + var launchHandler: (() -> Void)? |
| 19 | + var port: String? |
| 20 | + var heartbeatTask: Task<Void, Error>? |
| 21 | + |
| 22 | + init( |
| 23 | + languageServerExecutableURL: URL, |
| 24 | + managerDirectoryURL: URL, |
| 25 | + supportURL: URL, |
| 26 | + terminationHandler: (() -> Void)? = nil, |
| 27 | + launchHandler: (() -> Void)? = nil |
| 28 | + ) { |
| 29 | + self.languageServerExecutableURL = languageServerExecutableURL |
| 30 | + self.managerDirectoryURL = managerDirectoryURL |
| 31 | + self.supportURL = supportURL |
| 32 | + self.terminationHandler = terminationHandler |
| 33 | + self.launchHandler = launchHandler |
| 34 | + process = Process() |
| 35 | + transport = IOTransport() |
| 36 | + |
| 37 | + process.standardInput = transport.stdinPipe |
| 38 | + process.standardOutput = transport.stdoutPipe |
| 39 | + process.standardError = transport.stderrPipe |
| 40 | + |
| 41 | + process.executableURL = languageServerExecutableURL |
| 42 | + |
| 43 | + process.arguments = [ |
| 44 | + "--api_server_host", |
| 45 | + "server.codeium.com", |
| 46 | + "--api_server_port", |
| 47 | + "443", |
| 48 | + "--manager_dir", |
| 49 | + managerDirectoryURL.path, |
| 50 | + ] |
| 51 | + |
| 52 | + process.currentDirectoryURL = supportURL |
| 53 | + |
| 54 | + process.terminationHandler = { [weak self] task in |
| 55 | + self?.processTerminated(task) |
| 56 | + } |
| 57 | + } |
| 58 | + |
| 59 | + func start() { |
| 60 | + guard !process.isRunning else { return } |
| 61 | + port = nil |
| 62 | + do { |
| 63 | + try process.run() |
| 64 | + |
| 65 | + Task { |
| 66 | + func findPort() -> String? { |
| 67 | + // find a file in managerDirectoryURL whose name looks like a port, return the |
| 68 | + // name if found |
| 69 | + let fileManager = FileManager.default |
| 70 | + let enumerator = fileManager.enumerator( |
| 71 | + at: managerDirectoryURL, |
| 72 | + includingPropertiesForKeys: nil |
| 73 | + ) |
| 74 | + while let fileURL = enumerator?.nextObject() as? URL { |
| 75 | + if fileURL.lastPathComponent.range( |
| 76 | + of: #"^\d+$"#, |
| 77 | + options: .regularExpression |
| 78 | + ) != nil { |
| 79 | + return fileURL.lastPathComponent |
| 80 | + } |
| 81 | + } |
| 82 | + return nil |
| 83 | + } |
| 84 | + |
| 85 | + try await Task.sleep(nanoseconds: 2_000_000) |
| 86 | + port = findPort() |
| 87 | + var waited = 0 |
| 88 | + |
| 89 | + while true { |
| 90 | + try await Task.sleep(nanoseconds: 1_000_000_000) |
| 91 | + waited += 1 |
| 92 | + if let port = findPort() { |
| 93 | + finishStarting(port: port) |
| 94 | + return |
| 95 | + } |
| 96 | + if waited >= 60 { |
| 97 | + process.terminate() |
| 98 | + } |
| 99 | + } |
| 100 | + } |
| 101 | + } catch { |
| 102 | + Logger.codeium.error(error.localizedDescription) |
| 103 | + processTerminated(process) |
| 104 | + } |
| 105 | + } |
| 106 | + |
| 107 | + deinit { |
| 108 | + process.terminationHandler = nil |
| 109 | + process.terminate() |
| 110 | + transport.close() |
| 111 | + } |
| 112 | + |
| 113 | + private func processTerminated(_: Process) { |
| 114 | + transport.close() |
| 115 | + terminationHandler?() |
| 116 | + } |
| 117 | + |
| 118 | + private func finishStarting(port: String) { |
| 119 | + Logger.codeium.info("Language server started.") |
| 120 | + self.port = port |
| 121 | + launchHandler?() |
| 122 | + } |
| 123 | +} |
| 124 | + |
| 125 | +extension CodeiumLanguageServer: CodeiumLSP { |
| 126 | + func sendRequest<E>(_ request: E) async throws -> E.Response where E: CodeiumRequestType { |
| 127 | + guard let port else { throw CancellationError() } |
| 128 | + |
| 129 | + let request = request.makeURLRequest(server: "http://127.0.0.1:\(port)") |
| 130 | + let (data, response) = try await URLSession.shared.data(for: request) |
| 131 | + if (response as? HTTPURLResponse)?.statusCode == 200 { |
| 132 | + do { |
| 133 | + let response = try JSONDecoder().decode(E.Response.self, from: data) |
| 134 | + return response |
| 135 | + } catch { |
| 136 | + dump(error) |
| 137 | + Logger.codeium.error(error.localizedDescription) |
| 138 | + throw error |
| 139 | + } |
| 140 | + } else { |
| 141 | + do { |
| 142 | + let error = try JSONDecoder().decode(CodeiumResponseError.self, from: data) |
| 143 | + throw error |
| 144 | + } catch { |
| 145 | + Logger.codeium.error(error.localizedDescription) |
| 146 | + throw error |
| 147 | + } |
| 148 | + } |
| 149 | + } |
| 150 | +} |
| 151 | + |
| 152 | +final class IOTransport { |
| 153 | + public let stdinPipe: Pipe |
| 154 | + public let stdoutPipe: Pipe |
| 155 | + public let stderrPipe: Pipe |
| 156 | + private var closed: Bool |
| 157 | + private var queue: DispatchQueue |
| 158 | + |
| 159 | + public init() { |
| 160 | + stdinPipe = Pipe() |
| 161 | + stdoutPipe = Pipe() |
| 162 | + stderrPipe = Pipe() |
| 163 | + closed = false |
| 164 | + queue = DispatchQueue(label: "com.intii.CopilotForXcode.IOTransport") |
| 165 | + |
| 166 | + setupFileHandleHandlers() |
| 167 | + } |
| 168 | + |
| 169 | + public func write(_ data: Data) { |
| 170 | + if closed { |
| 171 | + return |
| 172 | + } |
| 173 | + |
| 174 | + let fileHandle = stdinPipe.fileHandleForWriting |
| 175 | + |
| 176 | + queue.async { |
| 177 | + fileHandle.write(data) |
| 178 | + } |
| 179 | + } |
| 180 | + |
| 181 | + public func close() { |
| 182 | + queue.sync { |
| 183 | + if self.closed { |
| 184 | + return |
| 185 | + } |
| 186 | + |
| 187 | + self.closed = true |
| 188 | + |
| 189 | + [stdoutPipe, stderrPipe, stdinPipe].forEach { pipe in |
| 190 | + pipe.fileHandleForWriting.closeFile() |
| 191 | + pipe.fileHandleForReading.closeFile() |
| 192 | + } |
| 193 | + } |
| 194 | + } |
| 195 | + |
| 196 | + private func setupFileHandleHandlers() { |
| 197 | + stdoutPipe.fileHandleForReading.readabilityHandler = { [unowned self] handle in |
| 198 | + let data = handle.availableData |
| 199 | + |
| 200 | + guard !data.isEmpty else { |
| 201 | + return |
| 202 | + } |
| 203 | + |
| 204 | + #if DEBUG |
| 205 | + self.forwardDataToHandler(data) |
| 206 | + #endif |
| 207 | + } |
| 208 | + |
| 209 | + stderrPipe.fileHandleForReading.readabilityHandler = { [unowned self] handle in |
| 210 | + let data = handle.availableData |
| 211 | + |
| 212 | + guard !data.isEmpty else { |
| 213 | + return |
| 214 | + } |
| 215 | + |
| 216 | + #if DEBUG |
| 217 | + self.forwardErrorDataToHandler(data) |
| 218 | + #endif |
| 219 | + } |
| 220 | + } |
| 221 | + |
| 222 | + private func forwardDataToHandler(_ data: Data) { |
| 223 | + queue.async { [weak self] in |
| 224 | + guard let self = self else { return } |
| 225 | + |
| 226 | + if self.closed { |
| 227 | + return |
| 228 | + } |
| 229 | + |
| 230 | + if let string = String(bytes: data, encoding: .utf8) { |
| 231 | + Logger.codeium.info("stdout: \(string)") |
| 232 | + } |
| 233 | + } |
| 234 | + } |
| 235 | + |
| 236 | + private func forwardErrorDataToHandler(_ data: Data) { |
| 237 | + queue.async { |
| 238 | + if let string = String(bytes: data, encoding: .utf8) { |
| 239 | + Logger.codeium.error("stderr: \(string)") |
| 240 | + } |
| 241 | + } |
| 242 | + } |
| 243 | +} |
| 244 | + |
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