nodejs/deps/npm/man/man1/npm-diff.1

.TH "NPM\-DIFF" "1" "May 2021" "" ""
.SH "NAME"
\fBnpm-diff\fR \- The registry diff command
.SS Synopsis
.P
.RS 2
.nf
npm diff [\.\.\.<paths>]
npm diff \-\-diff=<pkg\-name> [\.\.\.<paths>]
npm diff \-\-diff=<version\-a> [\-\-diff=<version\-b>] [\.\.\.<paths>]
npm diff \-\-diff=<spec\-a> [\-\-diff=<spec\-b>] [\.\.\.<paths>]
npm diff [\-\-diff\-ignore\-all\-space] [\-\-diff\-name\-only] [\.\.\.<paths>]
.fi
.RE
.SS Description
.P
Similar to its \fBgit diff\fP counterpart, this command will print diff patches
of files for packages published to the npm registry\.
.RS 0
.IP \(bu 2
\fBnpm diff \-\-diff=<spec\-a> \-\-diff=<spec\-b>\fP
  Compares two package versions using their registry specifiers, e\.g:
  \fBnpm diff \-\-diff=pkg@1\.0\.0 \-\-diff=pkg@^2\.0\.0\fP\|\. It's also possible to
  compare across forks of any package,
  e\.g: \fBnpm diff \-\-diff=pkg@1\.0\.0 \-\-diff=pkg\-fork@1\.0\.0\fP\|\.
  Any valid spec can be used, so that it's also possible to compare
  directories or git repositories,
  e\.g: \fBnpm diff \-\-diff=pkg@latest \-\-diff=\./packages/pkg\fP
  Here's an example comparing two different versions of a package named
  \fBabbrev\fP from the registry:
.P
.RS 2
.nf
  npm diff \-\-diff=abbrev@1\.1\.0 \-\-diff=abbrev@1\.1\.1
.fi
.RE
  On success, output looks like:
.P
.RS 2
.nf
  diff \-\-git a/package\.json b/package\.json
  index v1\.1\.0\.\.v1\.1\.1 100644
  \-\-\- a/package\.json
  +++ b/package\.json
  @@ \-1,6 +1,6 @@
   {
     "name": "abbrev",
  \-  "version": "1\.1\.0",
  +  "version": "1\.1\.1",
     "description": "Like ruby's abbrev module, but in js",
     "author": "Isaac Z\. Schlueter <i@izs\.me>",
     "main": "abbrev\.js",
.fi
.RE
  Given the flexible nature of npm specs, you can also target local
  directories or git repos just like when using \fBnpm install\fP:
.P
.RS 2
.nf
  npm diff \-\-diff=https://github\.com/npm/libnpmdiff \-\-diff=\./local\-path
.fi
.RE
  In the example above we can compare the contents from the package installed
  from the git repo at \fBgithub\.com/npm/libnpmdiff\fP with the contents of the
  \fB\|\./local\-path\fP that contains a valid package, such as a modified copy of
  the original\.
.IP \(bu 2
\fBnpm diff\fP (in a package directory, no arguments):
  If the package is published to the registry, \fBnpm diff\fP will fetch the
  tarball version tagged as \fBlatest\fP (this value can be configured using the
  \fBtag\fP option) and proceed to compare the contents of files present in that
  tarball, with the current files in your local file system\.
  This workflow provides a handy way for package authors to see what
  package\-tracked files have been changed in comparison with the latest
  published version of that package\.
.IP \(bu 2
\fBnpm diff \-\-diff=<pkg\-name>\fP (in a package directory):
  When using a single package name (with no version or tag specifier) as an
  argument, \fBnpm diff\fP will work in a similar way to
  \fBnpm\-outdated\fP \fInpm\-outdated\fR and reach for the registry to figure out
  what current published version of the package named \fB<pkg\-name>\fP
  will satisfy its dependent declared semver\-range\. Once that specific
  version is known \fBnpm diff\fP will print diff patches comparing the
  current version of \fB<pkg\-name>\fP found in the local file system with
  that specific version returned by the registry\.
  Given a package named \fBabbrev\fP that is currently installed:
.P
.RS 2
.nf
  npm diff \-\-diff=abbrev
.fi
.RE
  That will request from the registry its most up to date version and
  will print a diff output comparing the currently installed version to this
  newer one if the version numbers are not the same\.
.IP \(bu 2
\fBnpm diff \-\-diff=<spec\-a>\fP (in a package directory):
  Similar to using only a single package name, it's also possible to declare
  a full registry specifier version if you wish to compare the local version
  of an installed package with the specific version/tag/semver\-range provided
  in \fB<spec\-a>\fP\|\.
  An example: assuming \fBpkg@1\.0\.0\fP is installed in the current \fBnode_modules\fP
  folder, running:
.P
.RS 2
.nf
  npm diff \-\-diff=pkg@2\.0\.0
.fi
.RE
  It will effectively be an alias to
  \fBnpm diff \-\-diff=pkg@1\.0\.0 \-\-diff=pkg@2\.0\.0\fP\|\.
.IP \(bu 2
\fBnpm diff \-\-diff=<semver\-a> [\-\-diff=<semver\-b>]\fP (in a package directory):
  Using \fBnpm diff\fP along with semver\-valid version numbers is a shorthand
  to compare different versions of the current package\.
  It needs to be run from a package directory, such that for a package named
  \fBpkg\fP running \fBnpm diff \-\-diff=1\.0\.0 \-\-diff=1\.0\.1\fP is the same as running
  \fBnpm diff \-\-diff=pkg@1\.0\.0 \-\-diff=pkg@1\.0\.1\fP\|\.
  If only a single argument \fB<version\-a>\fP is provided, then the current local
  file system is going to be compared against that version\.
  Here's an example comparing two specific versions (published to the
  configured registry) of the current project directory:
.P
.RS 2
.nf
  npm diff \-\-diff=1\.0\.0 \-\-diff=1\.1\.0
.fi
.RE

.RE
.P
Note that tag names are not valid \fB\-\-diff\fP argument values, if you wish to
compare to a published tag, you must use the \fBpkg@tagname\fP syntax\.
.SS Filtering files
.P
It's possible to also specify positional arguments using file names or globs
pattern matching in order to limit the result of diff patches to only a subset
of files for a given package, e\.g:
.P
.RS 2
.nf
  npm diff \-\-diff=pkg@2 \./lib/ CHANGELOG\.md
.fi
.RE
.P
In the example above the diff output is only going to print contents of files
located within the folder \fB\|\./lib/\fP and changed lines of code within the
\fBCHANGELOG\.md\fP file\.
.SS Configuration
.SS diff
.RS 0
.IP \(bu 2
Type: Array
.IP \(bu 2
Default: null

.RE
.P
Defines npm package specifiers to compare using the \fBnpm diff\fP command\.
.P
This can be specified up to 2 times\.
.SS diff\-name\-only
.RS 0
.IP \(bu 2
Type: Boolean
.IP \(bu 2
Default: false

.RE
.P
When set to \fBtrue\fP running \fBnpm diff\fP only returns the names of the files that
have any difference\.
.SS diff\-unified
.RS 0
.IP \(bu 2
Type: Number
.IP \(bu 2
Default: \fB3\fP

.RE
.P
The number of lines of context to print in the unified diff format output\.
.SS diff\-ignore\-all\-space
.RS 0
.IP \(bu 2
Type: Boolean
.IP \(bu 2
Default: false

.RE
.P
Ignore whitespace when comparing lines\. This ignores differences even if one
line has whitespace where the other line has none\.
.SS diff\-no\-prefix
.RS 0
.IP \(bu 2
Type: Boolean
.IP \(bu 2
Default: false

.RE
.P
Do not show any source or destination prefix\.
.SS diff\-src\-prefix
.RS 0
.IP \(bu 2
Type: String
.IP \(bu 2
Default: \fB"a/"\fP

.RE
.P
Show the given source prefix in diff patches headers instead of using "a/"\.
.SS diff\-dst\-prefix
.RS 0
.IP \(bu 2
Type: String
.IP \(bu 2
Default: \fB"b/"\fP

.RE
.P
Show the given source prefix in diff patches headers instead of using "b/"\.
.SS diff\-text
.RS 0
.IP \(bu 2
Type: Boolean
.IP \(bu 2
Default: false

.RE
.P
Treat all files as text\.
.SS global
.RS 0
.IP \(bu 2
Default: false
.IP \(bu 2
Type: Boolean

.RE
.P
Uses packages from the global space as a source for comparison\.
.SS tag
.RS 0
.IP \(bu 2
Type: String
.IP \(bu 2
Default: \fB"latest"\fP

.RE
.P
The tag used to fetch the tarball that will be compared with the local file
system files when running npm diff with no arguments\.
.SH See Also
.RS 0
.IP \(bu 2
npm help outdated
.IP \(bu 2
npm help install
.IP \(bu 2
npm help config
.IP \(bu 2
npm help registry

.RE