为什么安装npm说我有未满足的依赖？ [英] Why does npm install say I have unmet dependencies?

问题描述

我有一个节点包。当我从包根目录运行 npm install 时，它会安装一堆东西，然后打印出如下所示的几个错误信息：

npm WARN unmet依赖/ Users / seanmackesey / google_drive / code / explore / generator / node_modules / findup-sync / node_modules / glob要求graceful-fs@'~1.2.0'但是会加载

我必须对什么是 npm安装确实感到困惑。如果检测到依赖关系，应该不会安装它？在什么条件下给我这样的错误信息，如何解决依赖关系？

解决方案

我相信是因为依赖解决方案有点破碎，
请参阅 https://github.com/isaacs/npm / issues / 1341＃issuecomment-20634338

您可能需要手动安装未满足依赖关系的顶级模块：

  npm install findup-sync@0.1.2 
  

或构造您的package.json，使得任何其他模块的依赖关系的顶级模块都列在下面。

您的问题也可能是npm无法下载包，超时或什么。有时重新运行 npm install 来补救。您还可以使用 npm install findup-sync@0.1.2 手动安装失败的软件包
。

再次尝试 npm安装之前可能有帮助的其他步骤是：

• 删除 node_modules 使用 rm -rf node_modules /


• 运行 npm缓存清理

删除 node_modules 有时是必要的：显然，如果嵌套模块在 npm install 期间无法安装，则后续的 npm install 将不会检测到那些缺少的嵌套依赖关系。如果是这种情况，有时删除那些缺少嵌套模块的顶级依赖关系，再次运行 npm install 就足够了。请参阅 https://github.com/npm/npm/issues/1336

I have a node package. When I run npm install from the package root, it installs a bunch of things, but then prints several error messages that look like this:

npm WARN unmet dependency /Users/seanmackesey/google_drive/code/explore/generator/node_modules/findup-sync/node_modules/glob requires graceful-fs@'~1.2.0' but will load

I must be confused about what exactly npm install does. If it detects a dependency, shouldn't it install it? Under what conditions does it give me error messages like this, and how can I resolve the dependencies?

解决方案

I believe it is because the dependency resolution is a bit broken, see https://github.com/isaacs/npm/issues/1341#issuecomment-20634338

You may need to manually install top-level modules that have unmet dependencies:

npm install findup-sync@0.1.2

Or structure your package.json such that any top-level modules that are also dependencies of other modules are listed lower down.

Your problem could also be that npm failed to download the package, timed-out or whatnot. Sometimes re-running npm install remedies it. You can also install the failed packages manually as well using npm install findup-sync@0.1.2.

Other steps that may help before attempting npm install again are:

• remove node_modules using rm -rf node_modules/
• run npm cache clean

To explain why removing node_modules sometimes is necessary: Apparently if a nested module fails to install during npm install, subsequent npm install won't detect those missing nested dependencies. If that's the case, sometimes it's sufficient to remove the top-level dependency of those missing nested modules, and running npm install again. See https://github.com/npm/npm/issues/1336

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