--- title: npm-find-dupes section: 1 description: Find duplication in the package tree --- ### Synopsis ```bash npm find-dupes ``` ### Description Runs `npm dedupe` in `--dry-run` mode, making npm only output the duplications, without actually changing the package tree. ### Configuration #### `global-style` * Default: false * Type: Boolean 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` * Default: false * Type: Boolean 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` * Default: false * Type: Boolean 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. 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. 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` * Default: true * Type: Boolean If set to false, then ignore `package-lock.json` files when installing. This will also prevent _writing_ `package-lock.json` if `save` is true. When package package-locks are disabled, automatic pruning of extraneous modules will also be disabled. To remove extraneous modules with package-locks disabled use `npm prune`. #### `omit` * Default: 'dev' if the `NODE_ENV` environment variable is set to 'production', otherwise empty. * Type: "dev", "optional", or "peer" (can be set multiple times) Dependency types to omit from the installation tree on disk. 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. If a package type appears in both the `--include` and `--omit` lists, then it will be included. If the resulting omit list includes `'dev'`, then the `NODE_ENV` environment variable will be set to `'production'` for all lifecycle scripts. #### `ignore-scripts` * Default: false * Type: Boolean If true, npm does not run scripts specified in package.json files. 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` * Default: true * Type: Boolean 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`](/commands/npm-audit) for details on what is submitted. #### `bin-links` * Default: true * Type: Boolean Tells npm to create symlinks (or `.cmd` shims on Windows) for package executables. 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` * Default: true * Type: Boolean When "true" displays the message at the end of each `npm install` acknowledging the number of dependencies looking for funding. See [`npm fund`](/commands/npm-fund) for details. #### `workspace` * Default: * Type: String (can be set multiple times) 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. Valid values for the `workspace` config are either: * Workspace names * Path to a workspace directory * Path to a parent workspace directory (will result in selecting all workspaces within that folder) 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. This value is not exported to the environment for child processes. #### `workspaces` * Default: null * Type: null or Boolean Set to true to run the command in the context of **all** configured workspaces. Explicitly setting this to false will cause commands like `install` to ignore workspaces altogether. When not set explicitly: - 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. This value is not exported to the environment for child processes. #### `include-workspace-root` * Default: false * Type: Boolean Include the workspace root when workspaces are enabled for a command. 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. ### See Also * [npm dedupe](/commands/npm-dedupe) * [npm ls](/commands/npm-ls) * [npm update](/commands/npm-update) * [npm install](/commands/npm-install)