'use strict'

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// remove a package.

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module.exports = uninstall

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const path = require('path')

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const validate = require('aproba')

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const readJson = require('read-package-json')

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const iferr = require('iferr')

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const npm = require('./npm.js')

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const Installer = require('./install.js').Installer

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const getSaveType = require('./install/save.js').getSaveType

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const removeDeps = require('./install/deps.js').removeDeps

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const log = require('npmlog')

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const usage = require('./utils/usage')

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uninstall.usage = usage(

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'uninstall',

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'npm uninstall [<@scope>/]<pkg>[@<version>]... [--save-prod|--save-dev|--save-optional] [--no-save]'

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)

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uninstall.completion = require('./utils/completion/installed-shallow.js')

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function uninstall (args, cb) {

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validate('AF', arguments)

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// the /path/to/node_modules/..

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const dryrun = !!npm.config.get('dry-run')

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if (args.length === 1 && args[0] === '.') args = []

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const where = npm.config.get('global') || !args.length

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? path.resolve(npm.globalDir, '..')

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: npm.prefix

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args = args.filter(function (a) {

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return path.resolve(a) !== where

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})

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if (args.length) {

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new Uninstaller(where, dryrun, args).run(cb)

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} else {

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// remove this package from the global space, if it's installed there

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readJson(path.resolve(npm.localPrefix, 'package.json'), function (er, pkg) {

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if (er && er.code !== 'ENOENT' && er.code !== 'ENOTDIR') return cb(er)

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if (er) return cb(uninstall.usage)

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new Uninstaller(where, dryrun, [pkg.name]).run(cb)

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})

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}

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}

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class Uninstaller extends Installer {

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constructor (where, dryrun, args) {

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super(where, dryrun, args)

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this.remove = []

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}

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loadArgMetadata (next) {

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this.args = this.args.map(function (arg) { return {name: arg} })

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next()

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}

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loadAllDepsIntoIdealTree (cb) {

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validate('F', arguments)

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this.remove = this.args

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this.args = []

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log.silly('uninstall', 'loadAllDepsIntoIdealTree')

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const saveDeps = getSaveType()

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super.loadAllDepsIntoIdealTree(iferr(cb, () => {

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removeDeps(this.remove, this.idealTree, saveDeps, cb)

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}))

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}

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// no top level lifecycles on rm

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runPreinstallTopLevelLifecycles (cb) { cb() }

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runPostinstallTopLevelLifecycles (cb) { cb() }

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}

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module.exports.Uninstaller = Uninstaller

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