internal…

installed-deep.js
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			module.exports = installedDeep

			var npm = require('../../npm.js')
			var readInstalled = require('read-installed')

			function installedDeep (opts, cb) {
			var local
			var global
			var depth = npm.config.get('depth')
			var opt = { depth: depth, dev: true }

			if (npm.config.get('global')) {
			local = []
			next()
			} else {
			readInstalled(npm.prefix, opt, function (er, data) {
			local = getNames(data \|\| {})
			next()
			})
			}

			readInstalled(npm.config.get('prefix'), opt, function (er, data) {
			global = getNames(data \|\| {})
			next()
			})

			function getNames_ (d, n) {
			if (d.realName && n) {
			if (n[d.realName]) return n
			n[d.realName] = true
			}
			if (!n) n = {}
			Object.keys(d.dependencies \|\| {}).forEach(function (dep) {
			getNames_(d.dependencies[dep], n)
			})
			return n
			}
			function getNames (d) {
			return Object.keys(getNames_(d))
			}

			function next () {
			if (!local \|\| !global) return
			if (!npm.config.get('global')) {
			global = global.map(function (g) {
			return [g, '-g']
			})
			}
			var names = local.concat(global)
			return cb(null, names)
			}
			}