npm-dedupe

减少包树中的重复

选择命令行版本：

概要

¥Synopsis

npm dedupe

alias: ddp

描述

¥Description

搜索本地包树并尝试通过将依赖移到树上更远的位置来简化整体结构，这样它们可以更有效地被多个依赖包共享。

¥Searches the local package tree and attempts to simplify the overall structure by moving dependencies further up the tree, where they can be more effectively shared by multiple dependent packages.

例如，考虑这个依赖图：

¥For example, consider this dependency graph:

a
+-- b <-- depends on c@1.0.x
|   `-- c@1.0.3
`-- d <-- depends on c@~1.0.9
    `-- c@1.0.10

在这种情况下，npm dedupe 会将树转换为：

¥In this case, npm dedupe will transform the tree to:

a
+-- b
+-- d
`-- c@1.0.10

由于 node 模块查找的分层特性，b 和 d 都将通过树根级别的单个 c 包来满足它们的依赖。

¥Because of the hierarchical nature of node's module lookup, b and d will both get their dependency met by the single c package at the root level of the tree.

在某些情况下，你可能有这样的依赖图：

¥In some cases, you may have a dependency graph like this:

a
+-- b <-- depends on c@1.0.x
+-- c@1.0.3
`-- d <-- depends on c@1.x
    `-- c@1.9.9

在安装过程中，b 的 c@1.0.3 依赖被放置在树的根目录中。尽管 c@1.0.3 可以满足 d 对 c@1.x 的依赖，但还是使用了较新的 c@1.9.0 依赖，因为 npm 默认支持更新，即使这样做会导致重复。

¥During the installation process, the c@1.0.3 dependency for b was placed in the root of the tree. Though d's dependency on c@1.x could have been satisfied by c@1.0.3, the newer c@1.9.0 dependency was used, because npm favors updates by default, even when doing so causes duplication.

运行 npm dedupe 会导致 npm 记下重复并重新评估，删除嵌套的 c 模块，因为根目录下的那个就足够了。

¥Running npm dedupe will cause npm to note the duplication and re-evaluate, deleting the nested c module, because the one in the root is sufficient.

要在安装过程中更喜欢数据去重而不是新奇，请运行 npm install --prefer-dedupe 或 npm config set prefer-dedupe true。

¥To prefer deduplication over novelty during the installation process, run npm install --prefer-dedupe or npm config set prefer-dedupe true.

参数被忽略。数据去重始终作用于整个树。

¥Arguments are ignored. Dedupe always acts on the entire tree.

请注意，此操作会转换依赖树，但不会导致安装新模块。

¥Note that this operation transforms the dependency tree, but will never result in new modules being installed.

使用 npm find-dupes 将在 --dry-run 模式下运行命令。

¥Using npm find-dupes will run the command in --dry-run mode.

注意：npm dedupe 永远不会更新项目 package.json 中直接依赖的 semver 值，如果你想更新 package.json 中的值，你可以运行：npm update --save 代替。

¥Note: npm dedupe will never update the semver values of direct dependencies in your project package.json, if you want to update values in package.json you can run: npm update --save instead.

配置

¥Configuration

`global-style`

默认值：false

¥Default: false
类型：布尔值

¥Type: Boolean

使 npm 以与全局 node_modules 文件夹相同的布局将包安装到本地 node_modules 文件夹中。只有你的直接依赖将显示在 node_modules 中，并且它们所依赖的所有内容都将展平在它们的 node_modules 文件夹中。这显然会消除一些数据去重。如果与 legacy-bundling 一起使用，则首选 legacy-bundling。

¥Causes npm to install the package into your local node_modules folder with the same layout it uses with the global node_modules folder. Only your direct dependencies will show in node_modules and everything they depend on will be flattened in their node_modules folders. This obviously will eliminate some deduping. If used with legacy-bundling, legacy-bundling will be preferred.

`legacy-bundling`

默认值：false

¥Default: false
类型：布尔值

¥Type: Boolean

使 npm 安装包，以便 1.4 之前的 npm 版本（例如 node 0.8 中包含的版本）可以安装包。这消除了所有自动数据去重。如果与 global-style 一起使用，则首选此选项。

¥Causes npm to install the package such that versions of npm prior to 1.4, such as the one included with node 0.8, can install the package. This eliminates all automatic deduping. If used with global-style this option will be preferred.

`strict-peer-deps`

默认值：false

¥Default: false
类型：布尔值

¥Type: Boolean

如果设置为 true，而 --legacy-peer-deps 没有设置，那么任何冲突的 peerDependencies 都将被视为安装失败，即使 npm 可以根据非对等依赖合理地猜测出适当的解决方案。

¥If set to true, and --legacy-peer-deps is not set, then any conflicting peerDependencies will be treated as an install failure, even if npm could reasonably guess the appropriate resolution based on non-peer dependency relationships.

默认情况下，依赖图中的冲突 peerDependencies 将使用最近的非对等依赖规范来解决，即使这样做会导致某些包收到超出其包的 peerDependencies 对象中设置的范围的对等依赖。

¥By default, conflicting peerDependencies deep in the dependency graph will be resolved using the nearest non-peer dependency specification, even if doing so will result in some packages receiving a peer dependency outside the range set in their package's peerDependencies object.

当执行这样的和覆盖时，会打印一个警告，解释冲突和所涉及的包。如果设置了 --strict-peer-deps，则此警告被视为失败。

¥When such and override is performed, a warning is printed, explaining the conflict and the packages involved. If --strict-peer-deps is set, then this warning is treated as a failure.

`package-lock`

默认值：true

¥Default: true
类型：布尔值

¥Type: Boolean

如果设置为 false，则安装时忽略 package-lock.json 文件。如果 save 为真，这也将阻止写入 package-lock.json。

¥If set to false, then ignore package-lock.json files when installing. This will also prevent writing package-lock.json if save is true.

此配置不影响 npm ci。

¥This configuration does not affect npm ci.

`omit`

默认值：'dev' 如果 NODE_ENV 环境变量设置为 'production'，否则为空。

¥Default: 'dev' if the NODE_ENV environment variable is set to 'production', otherwise empty.
类型："dev"、"optional"、"peer"（可多次设置）

¥Type: "dev", "optional", or "peer" (can be set multiple times)

要从磁盘上的安装树中省略的依赖类型。

¥Dependency types to omit from the installation tree on disk.

请注意，这些依赖仍会被解析并添加到 package-lock.json 或 npm-shrinkwrap.json 文件中。它们只是没有物理安装在磁盘上。

¥Note that these dependencies are still resolved and added to the package-lock.json or npm-shrinkwrap.json file. They are just not physically installed on disk.

如果一个包类型同时出现在 --include 和 --omit 列表中，那么它将被包括在内。

¥If a package type appears in both the --include and --omit lists, then it will be included.

如果生成的省略列表包含 'dev'，则 NODE_ENV 环境变量将针对所有生命周期脚本设置为 'production'。

¥If the resulting omit list includes 'dev', then the NODE_ENV environment variable will be set to 'production' for all lifecycle scripts.

`ignore-scripts`

默认值：false

¥Default: false
类型：布尔值

¥Type: Boolean

如果为 true，npm 不会运行 package.json 文件中指定的脚本。

¥If true, npm does not run scripts specified in package.json files.

请注意，如果设置了 ignore-scripts，则明确旨在运行特定脚本的命令（例如 npm start、npm stop、npm restart、npm test 和 npm run-script）仍将运行其预期的脚本，但它们不会运行任何前置或后置脚本。

¥Note that commands explicitly intended to run a particular script, such as npm start, npm stop, npm restart, npm test, and npm run-script will still run their intended script if ignore-scripts is set, but they will not run any pre- or post-scripts.

`audit`

默认值：true

¥Default: true
类型：布尔值

¥Type: Boolean

当 "true" 将审计报告与当前 npm 命令一起提交到默认注册表和为范围配置的所有注册表时。有关提交内容的详细信息，请参阅 npm audit 的文档。

¥When "true" submit audit reports alongside the current npm command to the default registry and all registries configured for scopes. See the documentation for npm audit for details on what is submitted.

`bin-links`

默认值：true

¥Default: true
类型：布尔值

¥Type: Boolean

告诉 npm 为包的可执行文件创建符号链接（或 Windows 上的 .cmd 垫片）。

¥Tells npm to create symlinks (or .cmd shims on Windows) for package executables.

设置为 false 使其不执行此操作。这可以用来解决某些文件系统不支持符号链接的事实，即使在表面上是 Unix 系统上也是如此。

¥Set to false to have it not do this. This can be used to work around the fact that some file systems don't support symlinks, even on ostensibly Unix systems.

`fund`

默认值：true

¥Default: true
类型：布尔值

¥Type: Boolean

当 "true" 在每个 npm install 的末尾显示消息时，确认正在寻找资金的依赖的数量。详见 npm fund。

¥When "true" displays the message at the end of each npm install acknowledging the number of dependencies looking for funding. See npm fund for details.

`dry-run`

默认值：false

¥Default: false
类型：布尔值

¥Type: Boolean

表示你不希望 npm 进行任何更改，并且它应该只报告它会做的事情。这可以传递到任何修改本地安装的命令中，例如 install、update、dedupe、uninstall 以及 pack 和 publish。

¥Indicates that you don't want npm to make any changes and that it should only report what it would have done. This can be passed into any of the commands that modify your local installation, eg, install, update, dedupe, uninstall, as well as pack and publish.

注意：其他网络相关命令不支持此功能，例如 dist-tags、owner 等。

¥Note: This is NOT honored by other network related commands, eg dist-tags, owner, etc.

`workspace`

默认值：

¥Default:
类型：字符串（可以设置多次）

¥Type: String (can be set multiple times)

启用在当前项目的已配置工作区的上下文中运行命令，同时通过仅运行此配置选项定义的工作区进行过滤。

¥Enable running a command in the context of the configured workspaces of the current project while filtering by running only the workspaces defined by this configuration option.

workspace 配置的有效值为：

¥Valid values for the workspace config are either:

工作区名称

¥Workspace names
工作区目录的路径

¥Path to a workspace directory
父工作区目录的路径（将导致选择该文件夹中的所有工作区）

¥Path to a parent workspace directory (will result in selecting all workspaces within that folder)

为 npm init 命令设置时，可以将其设置为尚不存在的工作区的文件夹，以创建文件夹并将其设置为项目中的全新工作区。

¥When set for the npm init command, this may be set to the folder of a workspace which does not yet exist, to create the folder and set it up as a brand new workspace within the project.

此值不会导出到子进程的环境中。

¥This value is not exported to the environment for child processes.

`workspaces`

默认值：null

¥Default: null
类型：空值或布尔值

¥Type: null or Boolean

设置为 true 可在所有已配置工作区的上下文中运行该命令。

¥Set to true to run the command in the context of all configured workspaces.

显式将此设置为 false 将导致像 install 这样的命令完全忽略工作区。未明确设置时：

¥Explicitly setting this to false will cause commands like install to ignore workspaces altogether. When not set explicitly:

在 node_modules 树上运行的命令（安装、更新等）会将工作区链接到 node_modules 文件夹。* 执行其他操作（测试、执行、发布等）的命令将在根项目上运行，除非在 workspace 配置中指定了一个或多个工作区。

¥Commands that operate on the node_modules tree (install, update, etc.) will link workspaces into the node_modules folder. - Commands that do other things (test, exec, publish, etc.) will operate on the root project, unless one or more workspaces are specified in the workspace config.

此值不会导出到子进程的环境中。

¥This value is not exported to the environment for child processes.

`include-workspace-root`

默认值：false

¥Default: false
类型：布尔值

¥Type: Boolean

为命令启用工作区时包括工作区根。

¥Include the workspace root when workspaces are enabled for a command.

当为 false 时，通过 workspace 配置指定单个工作区，或通过 workspaces 标志指定所有工作区，将导致 npm 仅在指定的工作区上运行，而不是在根项目上运行。

¥When false, specifying individual workspaces via the workspace config, or all workspaces via the workspaces flag, will cause npm to operate only on the specified workspaces, and not on the root project.

此值不会导出到子进程的环境中。

¥This value is not exported to the environment for child processes.

`install-links`

默认值：false

¥Default: false
类型：布尔值

¥Type: Boolean

设置文件时：存在于项目根之外的协议依赖将作为常规依赖打包和安装，而不是创建符号链接。此选项对工作区没有影响。

¥When set file: protocol dependencies that exist outside of the project root will be packed and installed as regular dependencies instead of creating a symlink. This option has no effect on workspaces.

也可以看看

¥See Also