Function readFile

src/node/runtime/RemoteRuntime.ts:344–385

* Read file contents as a stream via exec.

(filePath: string, abortSignal?: AbortSignal)

   * Read file contents as a stream via exec.
   */
  readFile(filePath: string, abortSignal?: AbortSignal): ReadableStream<Uint8Array> {
    return new ReadableStream<Uint8Array>({
      start: async (controller: ReadableStreamDefaultController<Uint8Array>) => {
        try {
          const stream = await this.exec(`cat ${this.quoteForRemote(filePath)}`, {
            cwd: this.getBasePath(),
            timeout: 300,
            abortSignal,
          });

          const reader = stream.stdout.getReader();
          const exitCodePromise = stream.exitCode;

          while (true) {
            const { done, value } = await reader.read();
            if (done) break;
            controller.enqueue(value);
          }

          const code = await exitCodePromise;
          if (code !== 0) {
            const stderr = await streamToString(stream.stderr);
            throw new RuntimeError(`Failed to read file ${filePath}: ${stderr}`, "file_io");
          }

          controller.close();
        } catch (err) {
          if (err instanceof RuntimeError) {
            controller.error(err);
          } else {
            controller.error(
              new RuntimeError(
                `Failed to read file ${filePath}: ${getErrorMessage(err)}`,
                "file_io",
                err instanceof Error ? err : undefined
              )
            );
          }
        }
      },
    });
  }

  /**
   * Write file contents atomically via exec.