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crossSpawn : nodeSpawn\n/* c8 ignore stop */\n\n/**\n * The signature for the cleanup method.\n *\n * Arguments indicate the exit status of the child process.\n *\n * If a Promise is returned, then the process is not terminated\n * until it resolves, and the resolution value is treated as the\n * exit status (if a number) or signal exit (if a signal string).\n *\n * If `undefined` is returned, then no change is made, and the parent\n * exits in the same way that the child exited.\n *\n * If boolean `false` is returned, then the parent's exit is canceled.\n *\n * If a number is returned, then the parent process exits with the number\n * as its exitCode.\n *\n * If a signal string is returned, then the parent process is killed with\n * the same signal that caused the child to exit.\n */\nexport type Cleanup = (\n  code: number | null,\n  signal: null | NodeJS.Signals,\n  processInfo: {\n    watchdogPid?: ChildProcess['pid']\n  },\n) =>\n  | void\n  | undefined\n  | number\n  | NodeJS.Signals\n  | false\n  | Promise<void | undefined | number | NodeJS.Signals | false>\n\nexport type FgArgs =\n  | [program: string | [cmd: string, ...args: string[]], cleanup?: Cleanup]\n  | [\n      program: [cmd: string, ...args: string[]],\n      opts?: SpawnOptions,\n      cleanup?: Cleanup,\n    ]\n  | [program: string, cleanup?: Cleanup]\n  | [program: string, opts?: SpawnOptions, cleanup?: Cleanup]\n  | [program: string, args?: string[], cleanup?: Cleanup]\n  | [\n      program: string,\n      args?: string[],\n      opts?: SpawnOptions,\n      cleanup?: Cleanup,\n    ]\n\n/**\n * Normalizes the arguments passed to `foregroundChild`.\n *\n * Exposed for testing.\n *\n * @internal\n */\nexport const normalizeFgArgs = (\n  fgArgs: FgArgs,\n): [\n  program: string,\n  args: string[],\n  spawnOpts: SpawnOptions,\n  cleanup: Cleanup,\n] => {\n  let [program, args = [], spawnOpts = {}, cleanup = () => {}] = fgArgs\n  if (typeof args === 'function') {\n    cleanup = args\n    spawnOpts = {}\n    args = []\n  } else if (!!args && typeof args === 'object' && !Array.isArray(args)) {\n    if (typeof spawnOpts === 'function') cleanup = spawnOpts\n    spawnOpts = args\n    args = []\n  } else if (typeof spawnOpts === 'function') {\n    cleanup = spawnOpts\n    spawnOpts = {}\n  }\n  if (Array.isArray(program)) {\n    const [pp, ...pa] = program\n    program = pp\n    args = pa\n  }\n  return [program, args, { ...spawnOpts }, cleanup]\n}\n\n/**\n * Spawn the specified program as a \"foreground\" process, or at least as\n * close as is possible given node's lack of exec-without-fork.\n *\n * Cleanup method may be used to modify or ignore the result of the child's\n * exit code or signal. If cleanup returns undefined (or a Promise that\n * resolves to undefined), then the parent will exit in the same way that\n * the child did.\n *\n * Return boolean `false` to prevent the parent's exit entirely.\n */\nexport function foregroundChild(\n  cmd: string | [cmd: string, ...args: string[]],\n  cleanup?: Cleanup,\n): ChildProcessByStdio<null, null, null>\nexport function foregroundChild(\n  program: string,\n  args?: string[],\n  cleanup?: Cleanup,\n): ChildProcessByStdio<null, null, null>\nexport function foregroundChild(\n  program: string,\n  spawnOpts?: SpawnOptions,\n  cleanup?: Cleanup,\n): ChildProcessByStdio<null, null, null>\nexport function foregroundChild(\n  program: string,\n  args?: string[],\n  spawnOpts?: SpawnOptions,\n  cleanup?: Cleanup,\n): ChildProcessByStdio<null, null, null>\nexport function foregroundChild(\n  ...fgArgs: FgArgs\n): ChildProcessByStdio<null, null, null> {\n  const [program, args, spawnOpts, cleanup] = normalizeFgArgs(fgArgs)\n\n  spawnOpts.stdio = [0, 1, 2]\n  if (process.send) {\n    spawnOpts.stdio.push('ipc')\n  }\n\n  const child = spawn(program, args, spawnOpts) as ChildProcessByStdio<\n    null,\n    null,\n    null\n  >\n\n  const childHangup = () => {\n    try {\n      child.kill('SIGHUP')\n\n      /* c8 ignore start */\n    } catch (_) {\n      // SIGHUP is weird on windows\n      child.kill('SIGTERM')\n    }\n    /* c8 ignore stop */\n  }\n  const removeOnExit = onExit(childHangup)\n\n  proxySignals(child)\n  const dog = watchdog(child)\n\n  let done = false\n  child.on('close', async (code, signal) => {\n    /* c8 ignore start */\n    if (done) return\n    /* c8 ignore stop */\n    done = true\n    const result = cleanup(code, signal, {\n      watchdogPid: dog.pid,\n    })\n    const res = isPromise(result) ? await result : result\n    removeOnExit()\n\n    if (res === false) return\n    else if (typeof res === 'string') {\n      signal = res\n      code = null\n    } else if (typeof res === 'number') {\n      code = res\n      signal = null\n    }\n\n    if (signal) {\n      // If there is nothing else keeping the event loop alive,\n      // then there's a race between a graceful exit and getting\n      // the signal to this process.  Put this timeout here to\n      // make sure we're still alive to get the signal, and thus\n      // exit with the intended signal code.\n      /* istanbul ignore next */\n      setTimeout(() => {}, 2000)\n      try {\n        process.kill(process.pid, signal)\n        /* c8 ignore start */\n      } catch (_) {\n        process.kill(process.pid, 'SIGTERM')\n      }\n      /* c8 ignore stop */\n    } else {\n      process.exit(code || 0)\n    }\n  })\n\n  if (process.send) {\n    process.removeAllListeners('message')\n\n    child.on('message', (message, sendHandle) => {\n      process.send?.(message, sendHandle)\n    })\n\n    process.on('message', (message, sendHandle) => {\n      child.send(\n        message as Serializable,\n        sendHandle as SendHandle | undefined,\n      )\n    })\n  }\n\n  return child\n}\n\nconst isPromise = (o: any): o is Promise<any> =>\n  !!o && typeof o === 'object' && typeof o.then === 'function'\n"]}