为什么node.js要安装两个'node_modules‘文件夹？

Question

每当我尝试运行npm install或npm start时，都会得到以下错误：

bash: line 0: cd: packages/react-scripts: No such file or directory
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! aristophanes@1.0.0 start: `cd packages/react-scripts && node bin/react-scripts.js start`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the aristophanes@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Aristophanes\AppData\Roaming\npm-cache\_logs\2018-11-09T12_14_19_704Z-debug.log

我不知道为什么我开始得到它。有人能给点线索吗？我又试过卸载和安装了，但没什么用。而且，我也不知道为什么，但是node.js在我的计算机中安装了两个node_modules文件夹-一个在我的C://Program Files/nodejs/目录中，另一个在C://Users/Aristophanes/中。每个文件中的两个package.json文件是不同的。

错误日志：

0 info it worked if it ends with ok
1 verbose cli [ 'C:\\Program Files\\nodejs\\node.exe',
1 verbose cli   'C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli   'start' ]
2 info using npm@6.4.1
3 info using node@v10.13.0
4 verbose config Skipping project config: C:\Users\Aristophanes/.npmrc. (matches userconfig)
5 verbose run-script [ 'prestart', 'start', 'poststart' ]
6 info lifecycle aristophanes@1.0.0~prestart: aristophanes@1.0.0
7 info lifecycle aristophanes@1.0.0~start: aristophanes@1.0.0
8 verbose lifecycle aristophanes@1.0.0~start: unsafe-perm in lifecycle true
9 verbose lifecycle aristophanes@1.0.0~start: PATH: C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin;C:\Users\Aristophanes\node_modules\.bin;C:\Program Files\cmder\bin;C:\Program Files\cmder\vendor\conemu-maximus5\ConEmu\Scripts;C:\Program Files\cmder\vendor\conemu-maximus5;C:\Program Files\cmder\vendor\conemu-maximus5\ConEmu;C:\Program Files\nodejs;C:\Python27\;C:\Python27\Scripts;C:\ProgramData\Boxstarter;C:\Program Files\Microsoft MPI\Bin\;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Go\bin;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Users\Aristophanes\Go\bin;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Users\Aristophanes\AppData\Local\Programs\Python\Python37;C:\Users\Aristophanes\AppData\Local\Programs\Python\Python37\Scripts;C:\Program Files\dotnet\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\PHP;C:\ProgramData\chocolatey\bin;C:\Program Files\Geth;C:\HashiCorp\Vagrant\bin;C:\Program Files\Git\cmd;C:\composer;C:\Users\Aristophanes\AppData\Roaming\npm;C:\Program Files\nodejs\;C:\Users\Aristophanes\AppData\Roaming\local\bin;C:\Users\Aristophanes\AppData\Local\Microsoft\WindowsApps;C:\Users\Aristophanes\AppData\Local\atom\bin;C:\Users\Aristophanes\AppData\Local\Microsoft\WindowsApps;C:\Users\Aristophanes\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users\Aristophanes\AppData\Local\GitHubDesktop\bin;C:\Users\Aristophanes\AppData\Roaming\Composer\vendor\bin;C:\Program Files\nodejs\bin;C:\Users\Aristophanes\AppData\Roaming\npm;C:\Program Files\Git\mingw64;C:\Program Files\Git\usr\bin;C:\Program Files\cmder
10 verbose lifecycle aristophanes@1.0.0~start: CWD: C:\Users\Aristophanes
11 silly lifecycle aristophanes@1.0.0~start: Args: [ '-c',
11 silly lifecycle   'cd packages/react-scripts && node bin/react-scripts.js start' ]
12 silly lifecycle aristophanes@1.0.0~start: Returned: code: 1  signal: null
13 info lifecycle aristophanes@1.0.0~start: Failed to exec start script
14 verbose stack Error: aristophanes@1.0.0 start: `cd packages/react-scripts && node bin/react-scripts.js start`
14 verbose stack Exit status 1
14 verbose stack     at EventEmitter.<anonymous> (C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\index.js:301:16)
14 verbose stack     at EventEmitter.emit (events.js:182:13)
14 verbose stack     at ChildProcess.<anonymous> (C:\Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14)
14 verbose stack     at ChildProcess.emit (events.js:182:13)
14 verbose stack     at maybeClose (internal/child_process.js:962:16)
14 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:251:5)
15 verbose pkgid aristophanes@1.0.0
16 verbose cwd C:\Users\Aristophanes
17 verbose Windows_NT 10.0.17134
18 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
19 verbose node v10.13.0
20 verbose npm  v6.4.1
21 error code ELIFECYCLE
22 error errno 1
23 error aristophanes@1.0.0 start: `cd packages/react-scripts && node bin/react-scripts.js start`
23 error Exit status 1
24 error Failed at the aristophanes@1.0.0 start script.
24 error This is probably not a problem with npm. There is likely additional logging output above.
25 verbose exit [ 1, true ]

Answer 1

C://Program /nodejs中的一个是您正在安装的全局包。

项目中的依赖项是项目的依赖项。

这个问题可能是由于您在一个没有package.json的文件夹上运行npm安装而引起的。

Answer 2

我认为您正面临这个挑战，因为您不在项目文件夹中，导航到您的项目文件夹，然后执行您的安装.just cd，然后您的应用程序的名称，然后按enter键//如下：

PS C：\Users\Alice\Desktop\project-文件夹> cd react app

Answer 3

我还没有得到任何关于为什么两个node_modules的解释。注意到./Program Files/nodejs中的pkgs是默认的，而我的Users dir中的是通过npm添加的第三方。在后者中还注意到package-lock.json的存在，这将锁定版本，而前者只包含package.json。