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'use strict'
const path = require('path')
const fs = require('graceful-fs')
const Bluebird = require('bluebird')
const rimraf = Bluebird.promisify(require('rimraf'))
const mkdirp = Bluebird.promisify(require('mkdirp'))
const lstat = Bluebird.promisify(fs.lstat)
const readdir = Bluebird.promisify(fs.readdir)
const symlink = Bluebird.promisify(fs.symlink)
const gentlyRm = require('../../utils/gently-rm')
const moduleStagingPath = require('../module-staging-path.js')
const move = require('move-concurrently')
const moveOpts = {fs: fs, Promise: Bluebird, maxConcurrency: 4}
const getRequested = require('../get-requested.js')
module.exports = function (staging, pkg, log) {
log.silly('finalize', pkg.realpath)
const extractedTo = moduleStagingPath(staging, pkg)
const delpath = path.join(path.dirname(pkg.realpath), '.' + path.basename(pkg.realpath) + '.DELETE')
let movedDestAway = false
const requested = pkg.package._requested || getRequested(pkg)
if (requested.type === 'directory') {
return makeParentPath(pkg.path)
.then(() => symlink(pkg.realpath, pkg.path, 'junction'))
.catch((ex) => {
return rimraf(pkg.path).then(() => symlink(pkg.realpath, pkg.path, 'junction'))
})
} else {
return makeParentPath(pkg.realpath)
.then(moveStagingToDestination)
.then(restoreOldNodeModules)
.catch((err) => {
if (movedDestAway) {
return rimraf(pkg.realpath).then(moveOldDestinationBack).then(() => {
throw err
})
} else {
throw err
}
})
.then(() => rimraf(delpath))
}
function makeParentPath (dir) {
return mkdirp(path.dirname(dir))
}
function moveStagingToDestination () {
return destinationIsClear()
.then(actuallyMoveStaging)
.catch(() => moveOldDestinationAway().then(actuallyMoveStaging))
}
function destinationIsClear () {
return lstat(pkg.realpath).then(() => {
throw new Error('destination exists')
}, () => {})
}
function actuallyMoveStaging () {
return move(extractedTo, pkg.realpath, moveOpts)
}
function moveOldDestinationAway () {
return rimraf(delpath).then(() => {
return move(pkg.realpath, delpath, moveOpts)
}).then(() => { movedDestAway = true })
}
function moveOldDestinationBack () {
return move(delpath, pkg.realpath, moveOpts).then(() => { movedDestAway = false })
}
function restoreOldNodeModules () {
if (!movedDestAway) return
return readdir(path.join(delpath, 'node_modules')).catch(() => []).then((modules) => {
if (!modules.length) return
return mkdirp(path.join(pkg.realpath, 'node_modules')).then(() => Bluebird.map(modules, (file) => {
const from = path.join(delpath, 'node_modules', file)
const to = path.join(pkg.realpath, 'node_modules', file)
return move(from, to, moveOpts)
}))
})
}
}
module.exports.rollback = function (top, staging, pkg, next) {
const requested = pkg.package._requested || getRequested(pkg)
if (requested.type === 'directory') return next()
gentlyRm(pkg.realpath, false, top, next)
}
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