使用 npm-check-updates 更新时找不到 Package.json 错误

Question

我正在尝试更新我的节点包/模块，很多人（很多来自 StackOverflow）推荐“npm-check-updates”，所以我通过 npm 下载并运行它。它给了我这个错误，我不确定出了什么问题。系统设置中的 PATH 变量有什么问题吗？我似乎无法通过搜索谷歌找到任何有用的东西。谢谢！

Answer 1

npm-check-updates 节点模块需要 package.json 文件来检查您的应用程序当前使用的版本。从代码中，它特别在当前目录中查找package.json来读取应用依赖，如果找不到则抛出错误。

Github Source Code

如果package.json 文件存在，模块会检查哪些包可以更新到更高版本并且已经过时。查看建议并手动验证后，您可能希望使用 -u 选项运行模块，这将使用较新版本的依赖项自动升级 package.json 文件。完成后，您可以运行npm install 下载最新版本。

这是运行此更新的示例。

~/Downloads/hackingedu/project 512-> ./node_modules/npm-check-updates/bin/npm-check-updates 

"babelify" can be updated from 6.0.2 to 6.1.2 (Installed: 6.0.2, Latest: 6.1.2)
"browserify" can be updated from 9.0.8 to 10.2.4 (Installed: 9.0.8, Latest: 10.2.4)
"canvas" can be updated from 1.2.2 to 1.2.3 (Installed: none, Latest: 1.2.3)
"express" can be updated from 4.12.3 to 4.12.4 (Installed: 4.12.3, Latest: 4.12.4)

Run with '-u' to upgrade your package.json
~/Downloads/hackingedu/project 513-> mv package.json package.json.old
~/Downloads/hackingedu/project 514-> ./node_modules/npm-check-updates/bin/npm-check-updates 
package.json not found
~/Downloads/hackingedu/project 515-> mv package.json.old package.json
~/Downloads/hackingedu/project 516-> cat package.json 
{
  "name": "workshop",
  "version": "0.0.1",
  "description": "",
  "dependencies": {
    "babelify": "6.0.2",
    "browserify": "9.0.8",
    "canvas": "1.2.2",
    "express": "4.12.3",
    "gameboy": "0.2.0",
    "socket.io": "1.3.5"
  }
}
~/Downloads/hackingedu/project 517-> ./node_modules/npm-check-updates/bin/npm-check-updates -u

"babelify" can be updated from 6.0.2 to 6.1.2 (Installed: 6.0.2, Latest: 6.1.2)
"browserify" can be updated from 9.0.8 to 10.2.4 (Installed: 9.0.8, Latest: 10.2.4)
"canvas" can be updated from 1.2.2 to 1.2.3 (Installed: none, Latest: 1.2.3)
"express" can be updated from 4.12.3 to 4.12.4 (Installed: 4.12.3, Latest: 4.12.4)

package.json upgraded
~/Downloads/hackingedu/project 518-> cat package.json 
{
  "name": "workshop",
  "version": "0.0.1",
  "description": "",
  "dependencies": {
    "babelify": "6.1.2",
    "browserify": "10.2.4",
    "canvas": "1.2.3",
    "express": "4.12.4",
    "gameboy": "0.2.0",
    "socket.io": "1.3.5"
  }
}

建议在您的package.json 文件中使用语义版本控制，您可以在package.json 最佳实践中使用learn more。