| <!doctype html> |
| <html> |
| <title>npm-dedupe</title> |
| <meta http-equiv="content-type" value="text/html;utf-8"> |
| <link rel="stylesheet" type="text/css" href="../../static/style.css"> |
| <link rel="canonical" href="https://www.npmjs.org/doc/cli/npm-dedupe.html"> |
| <script async=true src="../../static/toc.js"></script> |
| |
| <body> |
| <div id="wrapper"> |
| |
| <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...] |
| |
| aliases: find-dupes, ddp |
| </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> |
| |
| <table border=0 cellspacing=0 cellpadding=0 id=npmlogo> |
| <tr><td style="width:180px;height:10px;background:rgb(237,127,127)" colspan=18> </td></tr> |
| <tr><td rowspan=4 style="width:10px;height:10px;background:rgb(237,127,127)"> </td><td style="width:40px;height:10px;background:#fff" colspan=4> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=4> </td><td style="width:40px;height:10px;background:#fff" colspan=4> </td><td rowspan=4 style="width:10px;height:10px;background:rgb(237,127,127)"> </td><td colspan=6 style="width:60px;height:10px;background:#fff"> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=4> </td></tr> |
| <tr><td colspan=2 style="width:20px;height:30px;background:#fff" rowspan=3> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=3> </td><td style="width:10px;height:10px;background:#fff" rowspan=3> </td><td style="width:20px;height:10px;background:#fff" rowspan=4 colspan=2> </td><td style="width:10px;height:20px;background:rgb(237,127,127)" rowspan=2> </td><td style="width:10px;height:10px;background:#fff" rowspan=3> </td><td style="width:20px;height:10px;background:#fff" rowspan=3 colspan=2> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=3> </td><td style="width:10px;height:10px;background:#fff" rowspan=3> </td><td style="width:10px;height:10px;background:rgb(237,127,127)" rowspan=3> </td></tr> |
| <tr><td style="width:10px;height:10px;background:#fff" rowspan=2> </td></tr> |
| <tr><td style="width:10px;height:10px;background:#fff"> </td></tr> |
| <tr><td style="width:60px;height:10px;background:rgb(237,127,127)" colspan=6> </td><td colspan=10 style="width:10px;height:10px;background:rgb(237,127,127)"> </td></tr> |
| <tr><td colspan=5 style="width:50px;height:10px;background:#fff"> </td><td style="width:40px;height:10px;background:rgb(237,127,127)" colspan=4> </td><td style="width:90px;height:10px;background:#fff" colspan=9> </td></tr> |
| </table> |
| <p id="footer">npm-dedupe — npm@2.15.8</p> |
| |
