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---
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
<!-- AUTOGENERATED CONFIG DESCRIPTIONS START -->
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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`.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
#### `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.
<!-- automatically generated, do not edit manually -->
<!-- see lib/utils/config/definitions.js -->
<!-- AUTOGENERATED CONFIG DESCRIPTIONS END -->
### See Also
* [npm dedupe](/commands/npm-dedupe)
* [npm ls](/commands/npm-ls)
* [npm update](/commands/npm-update)
* [npm install](/commands/npm-install)
|
