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Check its log before trying again.\");\n}\n\nexport function helper(identifier: string, lane: boolean) {\n\tconst agent = service(identifier);\n\tconst receipt = join(config.home, \"desktop-update.json\");\n\t// A checkout's build uses its own source host; a registered service would outlive that code.\n\tconst isolated =\n\t\t`This development build only uses the Ace host started by bun run dev from its checkout, on port ${config.port}.`;\n\tlet changing = false;\n\n\tasync function info() {\n\t\tconst found = await health(config.port);\n\t\tif (found && found.home !== config.home) {\n\t\t\tthrow new Error(\n\t\t\t\t`Port ${config.port} belongs to an Ace host using a different data directory`,\n\t\t\t);\n\t\t}\n\t\treturn found;\n\t}\n\n\tasync function status(): Promise {\n\t\tconst found = await info();\n\t\treturn {\n\t\t\tservice: lane ? \"unregistered\" as const : agent.status(),\n\t\t\trunning: !!found,\n\t\t\tmanaged: !!found?.helper,\n\t\t};\n\t}\n\n\tasync function start(): Promise {\n\t\tif (lane) throw new Error(isolated);\n\t\tif (agent.status() === \"unregistered\") agent.register();\n\t\tif (agent.status() === \"approval\") {\n\t\t\tagent.settings();\n\t\t\tthrow new Error(\"Allow Ace in macOS Login Items, then start Ace Helper again.\");\n\t\t}\n\t\tconst child = Bun.spawn([\n\t\t\t\"/bin/launchctl\",\n\t\t\t\"kickstart\",\n\t\t\t`gui/${process.getuid!()}/${identifier}.helper`,\n\t\t], { stdout: \"ignore\", stderr: \"ignore\" });\n\t\tif (await child.exited !== 0) {\n\t\t\tthrow new Error(\"Could not start Ace Helper. Check macOS Login Items.\");\n\t\t}\n\t\tawait wait(async () => {\n\t\t\tconst found = await info();\n\t\t\tif (found && !found.helper) throw new Error(\"This port is in use by a command-line host.\");\n\t\t\treturn !!found;\n\t\t}, `Ace Helper did not start. See ${join(config.home, \"helper.log\")}`);\n\t}\n\n\tasync function request(op: \"update-prepare\" | \"update-cancel\") {\n\t\tconst client = new GatewayClient(`ws://127.0.0.1:${config.port}/ws`, token());\n\t\tlet timer: ReturnType | undefined;\n\t\ttry {\n\t\t\treturn await Promise.race([\n\t\t\t\t(async () => {\n\t\t\t\t\tawait wait(async () => client.status === \"open\", \"Could not connect to Ace Helper\");\n\t\t\t\t\treturn client.request<{ ready: boolean } | null>({ op });\n\t\t\t\t})(),\n\t\t\t\tnew Promise((_, reject) => {\n\t\t\t\t\ttimer = setTimeout(\n\t\t\t\t\t\t() => reject(new Error(\"Ace Helper did not finish preparing the update\")),\n\t\t\t\t\t\t30_000,\n\t\t\t\t\t);\n\t\t\t\t}),\n\t\t\t]);\n\t\t} finally {\n\t\t\tclearTimeout(timer);\n\t\t\tclient.close();\n\t\t}\n\t}\n\n\tasync function prepare(): Promise {\n\t\tif (changing) throw new Error(\"Ace Helper is already changing state\");\n\t\tchanging = true;\n\t\ttry {\n\t\t\tconst found = await info();\n\t\t\tif (!found?.helper || agent.status() !== \"enabled\") {\n\t\t\t\tthrow new Error(\n\t\t\t\t\t\"Start Ace Helper before installing an update. Command-line hosts cannot be updated from the app.\",\n\t\t\t\t);\n\t\t\t}\n\t\t\t// Recovery is needed even if the desktop exits between pausing and unregistering.\n\t\t\twriteFileSync(receipt, JSON.stringify({ helper: true }), { mode: 0o600 });\n\t\t\tif (!(await request(\"update-prepare\"))?.ready) {\n\t\t\t\tthrow new Error(\"This Ace Helper cannot prepare an update. Restart it and try again.\");\n\t\t\t}\n\t\t\tagent.unregister();\n\t\t\tawait exited(found.pid);\n\t\t} finally {\n\t\t\tchanging = false;\n\t\t}\n\t}\n\n\tasync function recover(): Promise {\n\t\tif (!existsSync(receipt)) return;\n\t\tconst found = await info();\n\t\tif (found && !found.helper) throw new Error(\"Stop the command-line host to resume Ace Helper\");\n\t\tif (found) await request(\"update-cancel\");\n\t\telse await start();\n\t\trmSync(receipt);\n\t}\n\n\tasync function act(action: HelperAction): Promise {\n\t\tif (action === \"status\") return status();\n\t\tif (action === \"settings\") {\n\t\t\tagent.settings();\n\t\t\treturn status();\n\t\t}\n\t\tif (action === \"log\") {\n\t\t\tUtils.showItemInFolder(join(config.home, \"helper.log\"));\n\t\t\treturn status();\n\t\t}\n\t\tif (lane) throw new Error(isolated);\n\t\tif (changing) throw new Error(\"Ace Helper is already changing state. Wait for it to finish.\");\n\t\tchanging = true;\n\t\ttry {\n\t\t\tconst found = await info();\n\t\t\tif (found && !found.helper) {\n\t\t\t\tthrow new Error(\n\t\t\t\t\t\"Ace is connected to a command-line host. Stop ace serve before managing Ace Helper.\",\n\t\t\t\t);\n\t\t\t}\n\t\t\tif (action === \"stop\") {\n\t\t\t\tif (agent.status() !== \"unregistered\") agent.unregister();\n\t\t\t\tif (found) await exited(found.pid);\n\t\t\t} else if (action === \"restart\") {\n\t\t\t\tif (!found) throw new Error(\"Start Ace Helper before restarting it.\");\n\t\t\t\tprocess.kill(found.pid, \"SIGTERM\");\n\t\t\t\tawait exited(found.pid);\n\t\t\t\tawait start();\n\t\t\t} else if (action === \"start\") {\n\t\t\t\tif (!found) await start();\n\t\t\t} else {\n\t\t\t\tthrow new Error(\"Unknown Ace Helper action\");\n\t\t\t}\n\t\t\treturn await status();\n\t\t} finally {\n\t\t\tchanging = false;\n\t\t}\n\t}\n\n\treturn { status, act, prepare, recover, pending: () => existsSync(receipt) 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