NAME

       npm-dedupe - Reduce duplication

SYNOPSIS

       npm dedupe [package names...]
       npm ddp [package names...]

DESCRIPTION

       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.

       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

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

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

       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.

       If a suitable version exists at the target location in the tree already, then it  will  be
       left untouched, but the other duplicates will be deleted.

       If no suitable version can be found, then a warning is printed, and nothing is done.

       If  any arguments are supplied, then they are filters, and only the named packages will be
       touched.

       Note that this operation transforms the  dependency  tree,  and  may  result  in  packages
       getting updated versions, perhaps from the npm registry.

       This feature is experimental, and may change in future versions.

SEE ALSO

       •   npm help ls

       •   npm help update

       •   npm help install

                                           October 2013                             NPM-DEDUPE(1)