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var util = require('util')
var path = require('path')
var validate = require('aproba')
var without = require('lodash.without')
var asyncMap = require('slide').asyncMap
var chain = require('slide').chain
var npa = require('npm-package-arg')
var log = require('npmlog')
var npm = require('./npm.js')
var Installer = require('./install.js').Installer
var findRequirement = require('./install/deps.js').findRequirement
var earliestInstallable = require('./install/deps.js').earliestInstallable
var checkPermissions = require('./install/check-permissions.js')
var decomposeActions = require('./install/decompose-actions.js')
var loadExtraneous = require('./install/deps.js').loadExtraneous
var filterInvalidActions = require('./install/filter-invalid-actions.js')
var recalculateMetadata = require('./install/deps.js').recalculateMetadata
var sortActions = require('./install/diff-trees.js').sortActions
module.exports = dedupe
module.exports.Deduper = Deduper
dedupe.usage = 'npm dedupe [package names...]'
function dedupe (args, cb) {
validate('AF', arguments)
// the /path/to/node_modules/..
var where = path.resolve(npm.dir, '..')
var dryrun = false
if (npm.command.match(/^find/)) dryrun = true
if (npm.config.get('dry-run')) dryrun = true
new Deduper(where, dryrun).run(cb)
}
function Deduper (where, dryrun) {
validate('SB', arguments)
Installer.call(this, where, dryrun, [])
this.noPackageJsonOk = true
this.topLevelLifecycles = false
}
util.inherits(Deduper, Installer)
Deduper.prototype.normalizeTree = function (log, cb) {
validate('OF', arguments)
log.silly('dedupe', 'normalizeTree')
// If we're looking globally only look at the one package we're operating on
if (npm.config.get('global')) {
var args = this.args
this.currentTree.children = this.currentTree.children.filter(function (child) {
return args.filter(function (arg) { return arg === child.package.name }).length
})
}
Installer.prototype.normalizeTree.call(this, log, cb)
}
Deduper.prototype.loadIdealTree = function (cb) {
validate('F', arguments)
log.silly('install', 'loadIdealTree')
var self = this
chain([
[this.newTracker(this.progress.loadIdealTree, 'cloneCurrentTree')],
[this, this.cloneCurrentTreeToIdealTree],
[this, this.finishTracker, 'cloneCurrentTree'],
[this.newTracker(this.progress.loadIdealTree, 'loadAllDepsIntoIdealTree', 10)],
[function (next) {
loadExtraneous(self.idealTree, self.progress.loadAllDepsIntoIdealTree, next)
}],
[this, this.finishTracker, 'loadAllDepsIntoIdealTree'],
[this, function (next) { recalculateMetadata(this.idealTree, log, next) } ],
], cb)
}
Deduper.prototype.generateActionsToTake = function (cb) {
validate('F', arguments)
log.silly('dedupe', 'generateActionsToTake')
chain([
[this.newTracker(log, 'hoist', 1)],
[hoistChildren, this.idealTree, this.differences],
[this, this.finishTracker, 'hoist'],
[this.newTracker(log, 'sort-actions', 1)],
[this, function (next) {
this.differences = sortActions(this.differences)
next()
}],
[this, this.finishTracker, 'sort-actions'],
[filterInvalidActions, this.where, this.differences],
[checkPermissions, this.differences],
[decomposeActions, this.differences, this.todo]
], cb)
}
function move (node, hoistTo, diff) {
node.parent.children = without(node.parent.children, node)
hoistTo.children.push(node)
node.fromPath = node.path
node.path = path.resolve(hoistTo.path, 'node_modules', node.package.name)
node.parent = hoistTo
if (!diff.filter(function (action) { return action[0] === 'move' && action[1] === node }).length) {
diff.push(['move', node])
}
}
function moveRemainingChildren (node, diff) {
node.children.forEach(function (child) {
move(child, node, diff)
moveRemainingChildren(child, diff)
})
}
function remove (child, diff, done) {
diff.push(['remove', child])
child.parent.children = without(child.parent.children, child)
asyncMap(child.children, function (child, next) {
remove(child, diff, next)
}, done)
}
function hoistChildren (tree, diff, next) {
validate('OAF', arguments)
asyncMap(tree.children, function (child, done) {
if (!tree.parent) return hoistChildren(child, diff, done)
var better = findRequirement(tree.parent, child.package.name, child.package._requested || npa(child.package.name + '@' + child.package.version))
if (better) {
return chain([
[remove, child, diff],
[recalculateMetadata, tree, log]
], done)
}
var hoistTo = earliestInstallable(tree, tree.parent, child.package)
if (hoistTo) {
move(child, hoistTo, diff)
chain([
[recalculateMetadata, hoistTo, log],
[hoistChildren, child, diff],
[function (next) {
moveRemainingChildren(child, diff)
next()
}]
], done)
} else {
done()
}
}, next)
}
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