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Clients learn the id from\n * the reply, so `attach` is called after it is sent and replays the scrollback up to that point.\n */\nexport async function open(\n\trequest: { channel: string; chat?: number; terminal?: string; cols: number; rows: number },\n): Promise<{ opened: TerminalOpened; attach(listener: Listener): () => void }> {\n\tconst existing = request.terminal && terminals.get(request.terminal);\n\tconst terminal = existing || await spawn(request);\n\tclearTimeout(terminal.orphaned);\n\tterminal.orphaned = undefined;\n\tif (existing) existing.pty.resize(request.cols, request.rows);\n\treturn {\n\t\topened: { terminal: terminal.id, cwd: terminal.cwd },\n\t\tattach(listener) {\n\t\t\tif (terminal.size) {\n\t\t\t\tconst data = Buffer.concat(terminal.chunks).toString(\"base64\");\n\t\t\t\tlistener({ terminal: terminal.id, data, replay: true });\n\t\t\t}\n\t\t\tterminal.listeners.add(listener);\n\t\t\treturn () => release(terminal, listener);\n\t\t},\n\t};\n}\n\nasync function spawn(\n\trequest: { channel: string; chat?: number; cols: number; rows: number },\n): Promise {\n\tconst id = crypto.randomUUID();\n\tconst dir = await cwd(request.channel, request.chat);\n\tconst shell = process.env.SHELL || \"/bin/zsh\";\n\tlet terminal!: Terminal;\n\tconst child = Bun.spawn([shell, \"-l\"], {\n\t\tcwd: dir,\n\t\tenv: { ...process.env, TERM: \"xterm-256color\", COLORTERM: \"truecolor\" },\n\t\tterminal: {\n\t\t\tcols: request.cols,\n\t\t\trows: request.rows,\n\t\t\tdata(_pty, data) {\n\t\t\t\tconst chunk = new Uint8Array(data);\n\t\t\t\tterminal.chunks.push(chunk);\n\t\t\t\tterminal.size += chunk.length;\n\t\t\t\twhile (terminal.size > SCROLLBACK && terminal.chunks.length > 1) {\n\t\t\t\t\tterminal.size -= terminal.chunks.shift()!.length;\n\t\t\t\t}\n\t\t\t\temit(terminal, { terminal: id, data: Buffer.from(chunk).toString(\"base64\") });\n\t\t\t},\n\t\t},\n\t});\n\tterminal = {\n\t\tid,\n\t\tchannel: request.channel,\n\t\tcwd: dir,\n\t\tprocess: child,\n\t\tpty: child.terminal!,\n\t\tchunks: [],\n\t\tsize: 0,\n\t\tlisteners: new Set(),\n\t};\n\tterminals.set(id, terminal);\n\tlog(\"info\", \"terminal.open\", {\n\t\tterminal: id,\n\t\tchannel: request.channel,\n\t\tcwd: dir,\n\t\tpid: child.pid,\n\t});\n\tchild.exited.then((code) => {\n\t\tlog(\"info\", \"terminal.exit\", { terminal: id, channel: request.channel, code });\n\t\temit(terminal, { terminal: id, exit: code });\n\t\tclearTimeout(terminal.orphaned);\n\t\tterminals.delete(id);\n\t});\n\treturn terminal;\n}\n\nexport function input(id: string, data: string) {\n\tterminals.get(id)?.pty.write(data);\n}\n\nexport function resize(id: string, cols: number, rows: number) {\n\tterminals.get(id)?.pty.resize(cols, rows);\n}\n\n/** Hang up the shell's process group, so commands it started go with it. */\nexport function close(id: string) {\n\tconst terminal = terminals.get(id);\n\tif (!terminal) return;\n\ttry {\n\t\tprocess.kill(-terminal.process.pid, \"SIGHUP\");\n\t} catch 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