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npm-ls(3) -- List installed packages
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======================================
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## SYNOPSIS
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npm.commands.ls(args, [silent,] callback)
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## DESCRIPTION
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This command will print to stdout all the versions of packages that are
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installed, as well as their dependencies, in a tree-structure. It will also
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return that data using the callback.
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This command does not take any arguments, but args must be defined.
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Beyond that, if any arguments are passed in, npm will politely warn that it
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does not take positional arguments, though you may set config flags
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like with any other command, such as `global` to list global packages.
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It will print out extraneous, missing, and invalid packages.
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If the silent parameter is set to true, nothing will be output to the screen,
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but the data will still be returned.
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Callback is provided an error if one occurred, the full data about which
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packages are installed and which dependencies they will receive, and a
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"lite" data object which just shows which versions are installed where.
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Note that the full data object is a circular structure, so care must be
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taken if it is serialized to JSON.
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## CONFIGURATION
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### long
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* Default: false
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* Type: Boolean
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Show extended information.
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### parseable
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* Default: false
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* Type: Boolean
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Show parseable output instead of tree view.
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### global
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* Default: false
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* Type: Boolean
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List packages in the global install prefix instead of in the current
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project.
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Note, if parseable is set or long isn't set, then duplicates will be trimmed.
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This means that if a submodule a same dependency as a parent module, then the
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dependency will only be output once.
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