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PR-URL: https://github.com/nodejs/node/pull/38750 Reviewed-By: Myles Borins <myles.borins@gmail.com> Reviewed-By: Beth Griggs <bgriggs@redhat.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
360 lines
12 KiB
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360 lines
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<title>npm-diff</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-diff">npm-diff</h1>
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<span class="description">The registry diff command</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="#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 diff [...<paths>]
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npm diff --diff=<pkg-name> [...<paths>]
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npm diff --diff=<version-a> [--diff=<version-b>] [...<paths>]
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npm diff --diff=<spec-a> [--diff=<spec-b>] [...<paths>]
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npm diff [--diff-ignore-all-space] [--diff-name-only] [...<paths>]
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</code></pre>
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<h3 id="description">Description</h3>
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<p>Similar to its <code>git diff</code> counterpart, this command will print diff patches
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of files for packages published to the npm registry.</p>
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<ul>
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<li>
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<p><code>npm diff --diff=<spec-a> --diff=<spec-b></code></p>
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<p>Compares two package versions using their registry specifiers, e.g:
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<code>npm diff --diff=pkg@1.0.0 --diff=pkg@^2.0.0</code>. It’s also possible to
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compare across forks of any package,
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e.g: <code>npm diff --diff=pkg@1.0.0 --diff=pkg-fork@1.0.0</code>.</p>
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<p>Any valid spec can be used, so that it’s also possible to compare
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directories or git repositories,
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e.g: <code>npm diff --diff=pkg@latest --diff=./packages/pkg</code></p>
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<p>Here’s an example comparing two different versions of a package named
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<code>abbrev</code> from the registry:</p>
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<pre lang="bash"><code>npm diff --diff=abbrev@1.1.0 --diff=abbrev@1.1.1
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</code></pre>
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<p>On success, output looks like:</p>
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<pre lang="bash"><code>diff --git a/package.json b/package.json
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index v1.1.0..v1.1.1 100644
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--- a/package.json
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+++ b/package.json
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@@ -1,6 +1,6 @@
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{
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"name": "abbrev",
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- "version": "1.1.0",
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+ "version": "1.1.1",
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"description": "Like ruby's abbrev module, but in js",
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"author": "Isaac Z. Schlueter <i@izs.me>",
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"main": "abbrev.js",
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</code></pre>
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<p>Given the flexible nature of npm specs, you can also target local
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directories or git repos just like when using <code>npm install</code>:</p>
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<pre lang="bash"><code>npm diff --diff=https://github.com/npm/libnpmdiff --diff=./local-path
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</code></pre>
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<p>In the example above we can compare the contents from the package installed
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from the git repo at <code>github.com/npm/libnpmdiff</code> with the contents of the
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<code>./local-path</code> that contains a valid package, such as a modified copy of
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the original.</p>
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</li>
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<li>
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<p><code>npm diff</code> (in a package directory, no arguments):</p>
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<p>If the package is published to the registry, <code>npm diff</code> will fetch the
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tarball version tagged as <code>latest</code> (this value can be configured using the
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<code>tag</code> option) and proceed to compare the contents of files present in that
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tarball, with the current files in your local file system.</p>
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<p>This workflow provides a handy way for package authors to see what
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package-tracked files have been changed in comparison with the latest
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published version of that package.</p>
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</li>
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<li>
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<p><code>npm diff --diff=<pkg-name></code> (in a package directory):</p>
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<p>When using a single package name (with no version or tag specifier) as an
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argument, <code>npm diff</code> will work in a similar way to
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<a href="npm-outdated"><code>npm-outdated</code></a> and reach for the registry to figure out
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what current published version of the package named <code><pkg-name></code>
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will satisfy its dependent declared semver-range. Once that specific
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version is known <code>npm diff</code> will print diff patches comparing the
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current version of <code><pkg-name></code> found in the local file system with
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that specific version returned by the registry.</p>
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<p>Given a package named <code>abbrev</code> that is currently installed:</p>
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<pre lang="bash"><code>npm diff --diff=abbrev
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</code></pre>
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<p>That will request from the registry its most up to date version and
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will print a diff output comparing the currently installed version to this
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newer one if the version numbers are not the same.</p>
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</li>
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<li>
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<p><code>npm diff --diff=<spec-a></code> (in a package directory):</p>
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<p>Similar to using only a single package name, it’s also possible to declare
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a full registry specifier version if you wish to compare the local version
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of an installed package with the specific version/tag/semver-range provided
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in <code><spec-a></code>.</p>
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<p>An example: assuming <code>pkg@1.0.0</code> is installed in the current <code>node_modules</code>
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folder, running:</p>
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<pre lang="bash"><code>npm diff --diff=pkg@2.0.0
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</code></pre>
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<p>It will effectively be an alias to
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<code>npm diff --diff=pkg@1.0.0 --diff=pkg@2.0.0</code>.</p>
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</li>
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<li>
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<p><code>npm diff --diff=<semver-a> [--diff=<semver-b>]</code> (in a package directory):</p>
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<p>Using <code>npm diff</code> along with semver-valid version numbers is a shorthand
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to compare different versions of the current package.</p>
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<p>It needs to be run from a package directory, such that for a package named
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<code>pkg</code> running <code>npm diff --diff=1.0.0 --diff=1.0.1</code> is the same as running
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<code>npm diff --diff=pkg@1.0.0 --diff=pkg@1.0.1</code>.</p>
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<p>If only a single argument <code><version-a></code> is provided, then the current local
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file system is going to be compared against that version.</p>
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<p>Here’s an example comparing two specific versions (published to the
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configured registry) of the current project directory:</p>
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<pre lang="bash"><code>npm diff --diff=1.0.0 --diff=1.1.0
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</code></pre>
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</li>
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</ul>
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<p>Note that tag names are not valid <code>--diff</code> argument values, if you wish to
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compare to a published tag, you must use the <code>pkg@tagname</code> syntax.</p>
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<h4 id="filtering-files">Filtering files</h4>
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<p>It’s possible to also specify positional arguments using file names or globs
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pattern matching in order to limit the result of diff patches to only a subset
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of files for a given package, e.g:</p>
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<pre lang="bash"><code>npm diff --diff=pkg@2 ./lib/ CHANGELOG.md
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</code></pre>
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<p>In the example above the diff output is only going to print contents of files
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located within the folder <code>./lib/</code> and changed lines of code within the
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<code>CHANGELOG.md</code> file.</p>
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<h3 id="configuration">Configuration</h3>
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<!-- raw HTML omitted -->
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<!-- raw HTML omitted -->
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<h4 id="diff"><code>diff</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>Define arguments to compare in <code>npm diff</code>.</p>
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<h4 id="diff-name-only"><code>diff-name-only</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>Prints only filenames when using <code>npm diff</code>.</p>
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<h4 id="diff-unified"><code>diff-unified</code></h4>
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<ul>
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<li>Default: 3</li>
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<li>Type: Number</li>
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</ul>
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<p>The number of lines of context to print in <code>npm diff</code>.</p>
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<h4 id="diff-ignore-all-space"><code>diff-ignore-all-space</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>Ignore whitespace when comparing lines in <code>npm diff</code>.</p>
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<h4 id="diff-no-prefix"><code>diff-no-prefix</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>Do not show any source or destination prefix in <code>npm diff</code> output.</p>
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<p>Note: this causes <code>npm diff</code> to ignore the <code>--diff-src-prefix</code> and
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<code>--diff-dst-prefix</code> configs.</p>
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<h4 id="diff-src-prefix"><code>diff-src-prefix</code></h4>
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<ul>
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<li>Default: “a/”</li>
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<li>Type: String</li>
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</ul>
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<p>Source prefix to be used in <code>npm diff</code> output.</p>
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<h4 id="diff-dst-prefix"><code>diff-dst-prefix</code></h4>
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<ul>
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<li>Default: “b/”</li>
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<li>Type: String</li>
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</ul>
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<p>Destination prefix to be used in <code>npm diff</code> output.</p>
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<h4 id="diff-text"><code>diff-text</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>Treat all files as text in <code>npm diff</code>.</p>
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<h4 id="global"><code>global</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>Operates in “global” mode, so that packages are installed into the <code>prefix</code>
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folder instead of the current working directory. See
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<a href="../configuring-npm/folders.html">folders</a> for more on the differences in behavior.</p>
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<ul>
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<li>packages are installed into the <code>{prefix}/lib/node_modules</code> folder, instead
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of the current working directory.</li>
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<li>bin files are linked to <code>{prefix}/bin</code></li>
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<li>man pages are linked to <code>{prefix}/share/man</code></li>
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</ul>
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<h4 id="tag"><code>tag</code></h4>
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<ul>
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<li>Default: “latest”</li>
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<li>Type: String</li>
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</ul>
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<p>If you ask npm to install a package and don’t tell it a specific version,
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then it will install the specified tag.</p>
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<p>Also the tag that is added to the package@version specified by the <code>npm tag</code>
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command, if no explicit tag is given.</p>
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<p>When used by the <code>npm diff</code> command, this is the tag used to fetch the
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tarball that will be compared with the local files by default.</p>
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<!-- raw HTML omitted -->
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<h2 id="see-also">See Also</h2>
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<ul>
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<li><a href="../commands/npm-outdated.html">npm outdated</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-config.html">npm config</a></li>
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<li><a href="../using-npm/registry.html">npm registry</a></li>
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</ul>
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</div>
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<footer id="edit">
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<a href="https://github.com/npm/cli/edit/latest/docs/content/commands/npm-diff.md">
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</svg>
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</a>
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</footer>
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</section>
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