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npm-dedupe(1) -- Reduce duplication
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===================================
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## SYNOPSIS
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npm dedupe [package names...]
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npm ddp [package names...]
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## DESCRIPTION
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Searches the local package tree and attempts to simplify the overall
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structure by moving dependencies further up the tree, where they can
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be more effectively shared by multiple dependent packages.
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For example, consider this dependency graph:
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a
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+-- b <-- depends on c@1.0.x
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| `-- c@1.0.3
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`-- d <-- depends on c@~1.0.9
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`-- c@1.0.10
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In this case, `npm-dedupe(1)` will transform the tree to:
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a
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+-- b
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+-- d
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`-- c@1.0.10
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Because of the hierarchical nature of node's module lookup, b and d
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will both get their dependency met by the single c package at the root
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level of the tree.
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If a suitable version exists at the target location in the tree
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already, then it will be left untouched, but the other duplicates will
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be deleted.
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If no suitable version can be found, then a warning is printed, and
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nothing is done.
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If any arguments are supplied, then they are filters, and only the
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named packages will be touched.
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Note that this operation transforms the dependency tree, and may
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result in packages getting updated versions, perhaps from the npm
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registry.
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This feature is experimental, and may change in future versions.
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The `--tag` argument will apply to all of the affected dependencies. If a
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tag with the given name exists, the tagged version is preferred over newer
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versions.
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## SEE ALSO
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* npm-ls(1)
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* npm-update(1)
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* npm-install(1)
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