[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10,"_11":12},"actionData","errors","root",{"_271":-5,"_274":275,"_276":277},"routes/shell",{"_40":41,"_270":-5,"_271":-5,"_272":273},"routes/repo",{"_33":-7,"_34":35,"_36":37,"_38":39,"_40":41,"_42":31,"_43":31,"_44":31,"_45":31,"_46":31,"_47":31,"_48":49,"_50":49,"_51":31,"_52":-7,"_53":-7,"_54":55,"_56":57,"_58":59,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68},"routes/repo.blob",{"_13":14,"_15":16,"_17":18,"_19":20,"_21":14,"_22":23,"_24":-5,"_25":26,"_27":28,"_28":29,"_30":31,"_32":14},"ref","f2dc95aec044cbce34eeb6cb8dbc45baf4c43327","path","packages/channel/src/workspace.ts","oid","136b903f203cf48602d4278be936c4bb671e7266","size",7026,"commit","mounts",[],"source","plain",{"_13":14,"_15":16},"kind","text","/**\n * A hosted channel has no file system or shell of its own. Its tools run on a workspace: a host\n * that connects out to the channel and serves each chat's file and shell calls from its own disk.\n */\nimport type { Context } from \"@earendil-works/chord\";\nimport { BACKGROUND_CONTEXT, withAbortSignal } from \"@earendil-works/chord/context\";\nimport {\n\terr,\n\ttype ExecutionEnv,\n\tExecutionError,\n\tFileError,\n\tok,\n\ttype Result,\n\ttype TextLineReader,\n} from \"@earendil-works/pi-durable/env\";\n\ndeclare function btoa(data: string): string;\ndeclare function atob(data: string): string;\n\n/** Channel to workspace. */\nexport type Call =\n\t| { call: number; method: Method; cwd: string; args: unknown[] }\n\t| { cancel: number };\n\n/** Workspace to channel. */\nexport type Reply =\n\t| { call: number; output: string }\n\t| { call: number; result: Result };\n\ntype Failure = {\n\tname: \"FileError\" | \"ExecutionError\";\n\tcode: string;\n\tmessage: string;\n\tpath?: string;\n};\n\nconst METHODS = [\n\t\"absolutePath\",\n\t\"joinPath\",\n\t\"readTextFile\",\n\t\"readTextLines\",\n\t\"readBinaryFile\",\n\t\"writeFile\",\n\t\"appendFile\",\n\t\"truncateFile\",\n\t\"flushFile\",\n\t\"renameFile\",\n\t\"fileInfo\",\n\t\"listDir\",\n\t\"canonicalPath\",\n\t\"exists\",\n\t\"createDir\",\n\t\"remove\",\n\t\"createTempDir\",\n\t\"createTempFile\",\n\t\"exec\",\n] as const;\ntype Method = (typeof METHODS)[number];\n\n/** JSON cannot carry bytes; file contents cross as tagged base64. */\nfunction encode(value: unknown): unknown {\n\tif (!(value instanceof Uint8Array)) return value;\n\tlet binary = \"\";\n\tfor (let i = 0; i < value.length; i += 0x8000) {\n\t\tbinary += String.fromCharCode(...value.subarray(i, i + 0x8000));\n\t}\n\treturn { $bytes: btoa(binary) };\n}\n\nfunction decode(value: unknown): unknown {\n\tif (typeof value !== \"object\" || value === null || !(\"$bytes\" in value)) return value;\n\treturn Uint8Array.from(atob((value as { $bytes: string }).$bytes), (c) => c.charCodeAt(0));\n}\n\nfunction failure(error: unknown): Failure {\n\tif (error instanceof FileError) {\n\t\treturn { name: \"FileError\", code: error.code, message: error.message, path: error.path };\n\t}\n\tconst code = error instanceof ExecutionError ? error.code : \"unknown\";\n\treturn {\n\t\tname: \"ExecutionError\",\n\t\tcode,\n\t\tmessage: error instanceof Error ? error.message : String(error),\n\t};\n}\n\nfunction rebuild(f: Failure): Error {\n\treturn f.name === \"FileError\"\n\t\t? new FileError(f.code as FileError[\"code\"], f.message, f.path)\n\t\t: new ExecutionError(f.code as ExecutionError[\"code\"], f.message);\n}\n\n/** The channel's side: one connection to the workspace, shared by every chat's environment. */\nexport class Link {\n\t#send?: (call: Call) => void;\n\t#next = 1;\n\t#pending = new Map<\n\t\tnumber,\n\t\t{ resolve(result: Result): void; output?(text: string): void }\n\t>();\n\n\t/** Attach the workspace's connection, replacing any earlier one. */\n\tattach(send: (call: Call) => void): void {\n\t\tthis.detach();\n\t\tthis.#send = send;\n\t}\n\n\t/** Calls in flight fail; pi reports interrupted tools to the model. */\n\tdetach(): void {\n\t\tthis.#send = undefined;\n\t\tfor (const pending of this.#pending.values()) {\n\t\t\tpending.resolve(err(new FileError(\"unknown\", \"The workspace disconnected\")));\n\t\t}\n\t\tthis.#pending.clear();\n\t}\n\n\tget attached(): boolean {\n\t\treturn !!this.#send;\n\t}\n\n\treceive(reply: Reply): void {\n\t\tconst pending = this.#pending.get(reply.call);\n\t\tif (!pending) return;\n\t\tif (\"output\" in reply) return pending.output?.(reply.output);\n\t\tthis.#pending.delete(reply.call);\n\t\tconst { result } = reply;\n\t\tpending.resolve(result.ok ? ok(decode(result.value)) : err(rebuild(result.error)));\n\t}\n\n\trequest(\n\t\tmethod: Method,\n\t\tcwd: string,\n\t\targs: unknown[],\n\t\tcontext: Context,\n\t\toutput?: (text: string) => void,\n\t): Promise> {\n\t\tconst send = this.#send;\n\t\tif (!send) {\n\t\t\tconst error = method === \"exec\"\n\t\t\t\t? new ExecutionError(\"unknown\", \"The workspace is offline\")\n\t\t\t\t: new FileError(\"unknown\", \"The workspace is offline\");\n\t\t\treturn Promise.resolve(err(error));\n\t\t}\n\t\tconst call = this.#next++;\n\t\tconst signal = context.abortSignal;\n\t\treturn new Promise((resolve) => {\n\t\t\tconst abort = () => send({ cancel: call });\n\t\t\tsignal?.addEventListener(\"abort\", abort, { once: true });\n\t\t\tthis.#pending.set(call, {\n\t\t\t\tresolve(result) {\n\t\t\t\t\tsignal?.removeEventListener(\"abort\", abort);\n\t\t\t\t\tresolve(result);\n\t\t\t\t},\n\t\t\t\toutput,\n\t\t\t});\n\t\t\tsend({ call, method, cwd, args: args.map(encode) });\n\t\t});\n\t}\n\n\t/** An execution environment at `cwd` on the workspace. `id` names the workspace's file namespace. */\n\tenv(id: string, cwd: string): ExecutionEnv {\n\t\tconst forward = (method: Method) => (...params: unknown[]) => {\n\t\t\tconst context = params.pop() as Context;\n\t\t\treturn this.request(method, cwd, params, context);\n\t\t};\n\t\tconst env = Object.fromEntries(\n\t\t\tMETHODS.map((method) => [method, forward(method)]),\n\t\t) as unknown as ExecutionEnv;\n\t\treturn Object.assign(env, {\n\t\t\tid,\n\t\t\tcwd,\n\t\t\texec: (command: string, options: Parameters[1], context: Context) => {\n\t\t\t\tconst { onOutput, ...rest } = options ?? {};\n\t\t\t\treturn this.request(\n\t\t\t\t\t\"exec\",\n\t\t\t\t\tcwd,\n\t\t\t\t\t[command, rest],\n\t\t\t\t\tcontext,\n\t\t\t\t\tonOutput && ((text) => onOutput(text, context)),\n\t\t\t\t);\n\t\t\t},\n\t\t\tasync openTextLineReader(path: string, context: Context) {\n\t\t\t\tconst text = await env.readTextFile(path, context);\n\t\t\t\tif (!text.ok) return text;\n\t\t\t\tconst lines = text.value.split(\"\\n\");\n\t\t\t\tconst last = lines.pop();\n\t\t\t\tconst queue = [\n\t\t\t\t\t...lines.map((line) => ({ text: line, terminated: true })),\n\t\t\t\t\t...(last ? [{ text: last, terminated: false }] : []),\n\t\t\t\t];\n\t\t\t\tconst reader: TextLineReader = {\n\t\t\t\t\treadLine: async () => ok(queue.shift()),\n\t\t\t\t\tclose: async () => {},\n\t\t\t\t};\n\t\t\t\treturn ok(reader);\n\t\t\t},\n\t\t\tasync cleanup() {},\n\t\t}) as ExecutionEnv;\n\t}\n}\n\n/** The workspace's side: run each call on a local environment and send back its outcome. */\nexport function serve(env: (cwd: string) => ExecutionEnv, send: (reply: Reply) => void) {\n\tconst running = new Map();\n\treturn async (call: Call) => {\n\t\tif (\"cancel\" in call) return running.get(call.cancel)?.abort();\n\t\tif (!METHODS.includes(call.method)) {\n\t\t\treturn send({\n\t\t\t\tcall: call.call,\n\t\t\t\tresult: err(failure(new Error(`Unknown method ${call.method}`))),\n\t\t\t});\n\t\t}\n\t\tconst abort = new AbortController();\n\t\trunning.set(call.call, abort);\n\t\tconst context = withAbortSignal(abort.signal, BACKGROUND_CONTEXT);\n\t\tconst target = env(call.cwd);\n\t\tconst args = 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