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文件协议

file: 协议从本地路径获取包。这对于在将包发布到 npm 注册表之前在本地测试包，或者在不依赖 npm 注册表中的版本的情况下分发特定依赖非常有用。

¥The file: protocol fetches a package from a local path. This can be useful for testing packages locally before publishing them to the npm registry, or distributing a particular dependency without relying on the version from the npm registry.

yarn add my-pkg@file:./relative/path/to/dependency/folder

打包​

¥Packing

警告

与 git: 依赖 不同，file: 指向的文件夹在导入项目之前不会被打包。这是我们可能会在未来的主要版本中修复的问题。

¥Unlike git: dependencies, the folder pointed to by file: is not packed before being imported in the project. This is something we'll likely fix in a future major version.

¥Folder-based links

当 file: 指向文件夹时，Yarn 将复制它而不是直接引用其来源。对于 node_modules 链接器，这意味着生成的 node_modules 的内容将是唯一的文件，并且在那里执行的更改不会影响原始源文件夹。

¥When file: points to a folder, Yarn will copy it rather than directly reference its sources. For the node_modules linker, it means that the content of the generated node_modules will be unique files, and that changes performed there won't affect the original source folder.

file:./relative/path/to/package.tgz

¥Tarball-based links

当 file: 指向 .tgz 文件时，Yarn 将透明地让你从存档中获取文件。对于 node_modules 链接器，这意味着存档将被解压到生成的 node_modules 文件夹中。

¥When file: points to a .tgz file, Yarn will transparently let you require files from within the archive. For the node_modules linker, it means that the archive will be unpacked into the generated node_modules folder.