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npm-dedupe.1
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			.TH "NPM\-DEDUPE" "1" "May 2016" "" ""
			.SH "NAME"
			\fBnpm-dedupe\fR \- Reduce duplication
			.SH SYNOPSIS
			.P
			.RS 2
			.nf
			npm dedupe
			npm ddp

			aliases: find\-dupes, ddp
			.fi
			.RE
			.SH DESCRIPTION
			.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
			For example, consider this dependency graph:
			.P
			.RS 2
			.nf
			a
			+\-\- b <\-\- depends on c@1\.0\.x
			\| `\-\- c@1\.0\.3
			`\-\- d <\-\- depends on c@~1\.0\.9
			`\-\- c@1\.0\.10
			.fi
			.RE
			.P
			In this case, npm help \fBnpm\-dedupe\fP will transform the tree to:
			.P
			.RS 2
			.nf
			a
			+\-\- b
			+\-\- d
			`\-\- c@1\.0\.10
			.fi
			.RE
			.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
			The deduplication algorithm walks the tree, moving each dependency as far
			up in the tree as possible, even if duplicates are not found\. This will
			result in both a flat and deduplicated tree\.
			.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
			Arguments are ignored\. Dedupe always acts on the entire tree\.
			.P
			Modules
			.P
			Note that this operation transforms the dependency tree, but will never
			result in new modules being installed\.
			.SH SEE ALSO
			.RS 0
			.IP \(bu 2
			npm help ls
			.IP \(bu 2
			npm help update
			.IP \(bu 2
			npm help install

			.RE