250 lines
7.2 KiB
HTML
250 lines
7.2 KiB
HTML
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<div class="title">
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npm command-line interface
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</div>
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</div>
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</div>
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<section id="content">
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<header class="title">
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<h1 id="npm-explain">npm-explain</h1>
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<span class="description">Explain installed packages</span>
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</header>
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<section id="table_of_contents">
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<h2 id="table-of-contents">Table of contents</h2>
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<div id="_table_of_contents"><ul><li><a href="#synopsis">Synopsis</a></li><li><a href="#description">Description</a></li><li><a href="#configuration">Configuration</a></li><ul><li><a href="#json"><code>json</code></a></li><li><a href="#workspace"><code>workspace</code></a></li></ul><li><a href="#see-also">See Also</a></li></ul></div>
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</section>
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<div id="_content"><h3 id="synopsis">Synopsis</h3>
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<pre lang="bash"><code>npm explain <folder | specifier>
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alias: why
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</code></pre>
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<h3 id="description">Description</h3>
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<p>This command will print the chain of dependencies causing a given package
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to be installed in the current project.</p>
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<p>Positional arguments can be either folders within <code>node_modules</code>, or
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<code>name@version-range</code> specifiers, which will select the dependency
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relationships to explain.</p>
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<p>For example, running <code>npm explain glob</code> within npm's source tree will show:</p>
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<pre lang="bash"><code>glob@7.1.6
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node_modules/glob
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glob@"^7.1.4" from the root project
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glob@7.1.1 dev
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node_modules/tacks/node_modules/glob
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glob@"^7.0.5" from rimraf@2.6.2
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node_modules/tacks/node_modules/rimraf
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rimraf@"^2.6.2" from tacks@1.3.0
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node_modules/tacks
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dev tacks@"^1.3.0" from the root project
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</code></pre>
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<p>To explain just the package residing at a specific folder, pass that as the
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argument to the command. This can be useful when trying to figure out
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exactly why a given dependency is being duplicated to satisfy conflicting
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version requirements within the project.</p>
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<pre lang="bash"><code>$ npm explain node_modules/nyc/node_modules/find-up
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find-up@3.0.0 dev
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node_modules/nyc/node_modules/find-up
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find-up@"^3.0.0" from nyc@14.1.1
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node_modules/nyc
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nyc@"^14.1.1" from tap@14.10.8
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node_modules/tap
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dev tap@"^14.10.8" from the root project
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</code></pre>
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<h3 id="configuration">Configuration</h3>
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<h4 id="json"><code>json</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>Whether or not to output JSON data, rather than the normal output.</p>
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<ul>
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<li>In <code>npm pkg set</code> it enables parsing set values with JSON.parse() before
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saving them to your <code>package.json</code>.</li>
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</ul>
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<p>Not supported by all npm commands.</p>
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<h4 id="workspace"><code>workspace</code></h4>
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<ul>
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<li>Default:</li>
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<li>Type: String (can be set multiple times)</li>
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</ul>
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<p>Enable running a command in the context of the configured workspaces of the
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current project while filtering by running only the workspaces defined by
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this configuration option.</p>
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<p>Valid values for the <code>workspace</code> config are either:</p>
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<ul>
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<li>Workspace names</li>
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<li>Path to a workspace directory</li>
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<li>Path to a parent workspace directory (will result in selecting all
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workspaces within that folder)</li>
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</ul>
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<p>When set for the <code>npm init</code> command, this may be set to the folder of a
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workspace which does not yet exist, to create the folder and set it up as a
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brand new workspace within the project.</p>
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<p>This value is not exported to the environment for child processes.</p>
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<h3 id="see-also">See Also</h3>
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<ul>
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<li><a href="../commands/npm-config.html">npm config</a></li>
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<li><a href="../configuring-npm/npmrc.html">npmrc</a></li>
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<li><a href="../configuring-npm/folders.html">npm folders</a></li>
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<li><a href="../commands/npm-ls.html">npm ls</a></li>
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<li><a href="../commands/npm-install.html">npm install</a></li>
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<li><a href="../commands/npm-link.html">npm link</a></li>
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<li><a href="../commands/npm-prune.html">npm prune</a></li>
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<li><a href="../commands/npm-outdated.html">npm outdated</a></li>
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<li><a href="../commands/npm-update.html">npm update</a></li>
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</ul>
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</div>
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