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63 lines
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63 lines
4.1 KiB
HTML
<!doctype html>
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<title>npm-dedupe</title>
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<meta charset="utf-8">
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<link rel="stylesheet" type="text/css" href="../../static/style.css">
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<link rel="canonical" href="https://www.npmjs.org/doc/cli/npm-dedupe.html">
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<script async=true src="../../static/toc.js"></script>
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<body>
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<h1><a href="../cli/npm-dedupe.html">npm-dedupe</a></h1> <p>Reduce duplication</p>
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<h2 id="synopsis">SYNOPSIS</h2>
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<pre><code>npm dedupe
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npm ddp
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aliases: find-dupes, ddp</code></pre><h2 id="description">DESCRIPTION</h2>
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<p>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.</p>
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<p>For example, consider this dependency graph:</p>
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<pre><code>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</code></pre><p>In this case, <code><a href="../cli/npm-dedupe.html">npm-dedupe(1)</a></code> will transform the tree to:</p>
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<pre><code>a
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+-- b
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+-- d
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`-- c@1.0.10</code></pre><p>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.</p>
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<p>The deduplication algorithm walks the tree, moving each dependency as far
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up in the tree as possible, even if duplicates are not found. This will
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result in both a flat and deduplicated tree.</p>
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<p>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.</p>
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<p>Arguments are ignored. Dedupe always acts on the entire tree.</p>
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<p>Modules</p>
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<p>Note that this operation transforms the dependency tree, but will never
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result in new modules being installed.</p>
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<h2 id="see-also">SEE ALSO</h2>
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<ul>
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<li><a href="../cli/npm-ls.html">npm-ls(1)</a></li>
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<li><a href="../cli/npm-update.html">npm-update(1)</a></li>
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<li><a href="../cli/npm-install.html">npm-install(1)</a></li>
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</ul>
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</div>
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<table border=0 cellspacing=0 cellpadding=0 id=npmlogo>
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<tr><td style="width:180px;height:10px;background:rgb(237,127,127)" colspan=18> </td></tr>
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<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>
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<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>
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<tr><td style="width:10px;height:10px;background:#fff" rowspan=2> </td></tr>
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<tr><td style="width:10px;height:10px;background:#fff"> </td></tr>
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<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>
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<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>
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</table>
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<p id="footer">npm-dedupe — npm@6.5.0</p>
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