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| <h1><a href="../cli/npm-dedupe.html">npm-dedupe</a></h1> <p>Reduce duplication</p> |
| |
| <h2 id="SYNOPSIS">SYNOPSIS</h2> |
| |
| <pre><code>npm dedupe [package names...] |
| npm ddp [package names...]</code></pre> |
| |
| <h2 id="DESCRIPTION">DESCRIPTION</h2> |
| |
| <p>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.</p> |
| |
| <p>For example, consider this dependency graph:</p> |
| |
| <pre><code>a |
| +-- b <-- depends on c@1.0.x |
| | `-- c@1.0.3 |
| `-- d <-- depends on c@~1.0.9 |
| `-- c@1.0.10</code></pre> |
| |
| <p>In this case, <code><a href="../cli/npm-dedupe.html">npm-dedupe(1)</a></code> will transform the tree to:</p> |
| |
| <pre><code>a |
| +-- b |
| +-- d |
| `-- c@1.0.10</code></pre> |
| |
| <p>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.</p> |
| |
| <p>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.</p> |
| |
| <p>If no suitable version can be found, then a warning is printed, and |
| nothing is done.</p> |
| |
| <p>If any arguments are supplied, then they are filters, and only the |
| named packages will be touched.</p> |
| |
| <p>Note that this operation transforms the dependency tree, and may |
| result in packages getting updated versions, perhaps from the npm |
| registry.</p> |
| |
| <p>This feature is experimental, and may change in future versions.</p> |
| |
| <p>The <code>--tag</code> argument will apply to all of the affected dependencies. If a |
| tag with the given name exists, the tagged version is preferred over newer |
| versions.</p> |
| |
| <h2 id="SEE-ALSO">SEE ALSO</h2> |
| |
| <ul><li><a href="../cli/npm-ls.html">npm-ls(1)</a></li><li><a href="../cli/npm-update.html">npm-update(1)</a></li><li><a href="../cli/npm-install.html">npm-install(1)</a></li></ul> |
| </div> |
| <p id="footer">npm-dedupe — npm@1.3.21</p> |
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