读取包时出错：graceful-fs\package.json

Question

我最近安装了 Node.js、npm、ionic 和 cordova，如 Ionic Getting Started 所述

现在，当我打开我的 Visual Studio 项目时，Bower/NPM 窗口显示以下错误：

System.AggregateException：发生一个或多个错误。 ---> Microsoft.NodejsTools.Npm.PackageJsonException：读取错误 package.json 在 'C:\Users\Colin\AppData\Roaming\npm\node_modules\cordova\node_modules\npm\node_modules\graceful-fs\package.json'： 读取 package.json 时出错。该文件可能是可解析的 JSON，但可能 包含具有重复属性的对象。

这似乎是由于problem with the npm package。那么我该如何解决这个问题呢？我要安装较早版本的 Node、npm、cordova 还是 graceful-fs？我该怎么做？

编辑 根据 Vikas Vats 的评论，我运行了以下命令：

cordova -v 有人告诉我我的全球版本是 5.3.3

npm uninstall -g cordova

npm install -g cordova@4.3.0

我现在在 graceful-fs\package.json 中报告了相同的错误，但这次它位于不同的位置：

C:\Users\Colin\AppData\Roaming\npm\node_modules\ionic\node_modules\ionic-app-lib\node_modules\ionic-cordova-lib\node_modules\npm\node_modules\graceful-fs\package.json

Answer 1

来自https://github.com/npm/npm/issues/9965

在文本编辑器中打开 C:\Users\Colin\AppData\Roaming\npm\node_modules\ionic\node_modules\ionic-app-lib\node_modules\ionic-cordova-lib\node_modules\npm\node_modules\graceful-fs\package.json 并删除重复的根键：

• 引擎
• githead
• 错误
• 主页
• _id
• _shasum
• _来自
• _npmVersion
• _nodeVersion
• _npmUser
• 分布
• 存储库
• 版本

根键在package.json中只能出现一次

Answer 2

我卸载了 cordova - 将其恢复为 Visual Studio 测试过的版本：

npm uninstall -g cordova

npm install -g cordova@4.3.0

这将错误转移到 ionic。于是我把 Ionic 带回了 1.6.5 版本：

npm uninstall -g ionic

npm install -g ionic@1.6.5

这修复了 graceful-fs/package.json 文件。我已经复制了这里的内容：

{
  "author": {
    "name": "Isaac Z. Schlueter",
    "email": "i@izs.me",
    "url": "http://blog.izs.me"
  },
  "name": "graceful-fs",
  "description": "A drop-in replacement for fs, making various improvements.",
  "version": "2.0.0",
  "repository": {
    "type": "git",
    "url": "git://github.com/isaacs/node-graceful-fs.git"
  },
  "main": "graceful-fs.js",
  "engines": {
    "node": ">=0.4.0"
  },
  "directories": {
    "test": "test"
  },
  "scripts": {
    "test": "tap test/*.js"
  },
  "keywords": [
    "fs",
    "module",
    "reading",
    "retry",
    "retries",
    "queue",
    "error",
    "errors",
    "handling",
    "EMFILE",
    "EAGAIN",
    "EINVAL",
    "EPERM",
    "EACCESS"
  ],
  "license": "BSD",
  "readme": "# graceful-fs\n\ngraceful-fs functions as a drop-in replacement for the fs module,\nmaking various improvements.\n\nThe improvements are meant to normalize behavior across different\nplatforms and environments, and to make filesystem access more\nresilient to errors.\n\n## Improvements over fs module\n\ngraceful-fs:\n\n* keeps track of how many file descriptors are open, and by default\n  limits this to 1024. Any further requests to open a file are put in a\n  queue until new slots become available. If 1024 turns out to be too\n  much, it decreases the limit further.\n* fixes `lchmod` for Node versions prior to 0.6.2.\n* implements `fs.lutimes` if possible. Otherwise it becomes a noop.\n* ignores `EINVAL` and `EPERM` errors in `chown`, `fchown` or\n  `lchown` if the user isn't root.\n* makes `lchmod` and `lchown` become noops, if not available.\n* retries reading a file if `read` results in EAGAIN error.\n\nOn Windows, it retries renaming a file for up to one second if `EACCESS`\nor `EPERM` error occurs, likely because antivirus software has locked\nthe directory.\n\n## Configuration\n\nThe maximum number of open file descriptors that graceful-fs manages may\nbe adjusted by setting `fs.MAX_OPEN` to a different number. The default\nis 1024.\n",
  "readmeFilename": "README.md",
  "bugs": {
    "url": "https://github.com/isaacs/node-graceful-fs/issues"
  },
  "_id": "graceful-fs@2.0.0",
  "_from": "graceful-fs@2"
}

我还尝试了下一个 Ionic 版本 - 1.7.0 和最新版本 - 1.7.7。问题又来了，所以我现在还是坚持 1.6.5

参考 Ionic releases