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'use strict'
var path = require('path')
var rimraf = require('rimraf')
var fs = require('graceful-fs')
var mkdirp = require('mkdirp')
var asyncMap = require('slide').asyncMap
var move = require('../../utils/move.js')
var gentlyRm = require('../../utils/gently-rm')
var moduleStagingPath = require('../module-staging-path.js')
module.exports = function (staging, pkg, log, next) {
log.silly('finalize', pkg.path)
var extractedTo = moduleStagingPath(staging, pkg)
var delpath = path.join(path.dirname(pkg.path), '.' + path.basename(pkg.path) + '.DELETE')
mkdirp(path.resolve(pkg.path, '..'), whenParentExists)
function whenParentExists (mkdirEr) {
if (mkdirEr) return next(mkdirEr)
// We stat first, because we can't rely on ENOTEMPTY from Windows.
// Windows, by contrast, gives the generic EPERM of a folder already exists.
fs.lstat(pkg.path, destStatted)
}
function destStatted (doesNotExist) {
if (doesNotExist) {
move(extractedTo, pkg.path, whenMoved)
} else {
moveAway()
}
}
function whenMoved (moveEr) {
if (!moveEr) return next()
if (moveEr.code !== 'ENOTEMPTY' && moveEr.code !== 'EEXIST') return next(moveEr)
moveAway()
}
function moveAway () {
move(pkg.path, delpath, whenOldMovedAway)
}
function whenOldMovedAway (moveEr) {
if (moveEr) return next(moveEr)
move(extractedTo, pkg.path, whenConflictMoved)
}
function whenConflictMoved (moveEr) {
// if we got an error we'll try to put back the original module back,
// succeed or fail though we want the original error that caused this
if (moveEr) return move(delpath, pkg.path, function () { next(moveEr) })
fs.readdir(path.join(delpath, 'node_modules'), makeTarget)
}
function makeTarget (readdirEr, files) {
if (readdirEr) return cleanup()
if (!files.length) return cleanup()
mkdirp(path.join(pkg.path, 'node_modules'), function (mkdirEr) { moveModules(mkdirEr, files) })
}
function moveModules (mkdirEr, files) {
if (mkdirEr) return next(mkdirEr)
asyncMap(files, function (file, done) {
var from = path.join(delpath, 'node_modules', file)
var to = path.join(pkg.path, 'node_modules', file)
move(from, to, done)
}, cleanup)
}
function cleanup (moveEr) {
if (moveEr) return next(moveEr)
rimraf(delpath, afterCleanup)
}
function afterCleanup (rimrafEr) {
if (rimrafEr) log.warn('finalize', rimrafEr)
next()
}
}
module.exports.rollback = function (top, staging, pkg, next) {
gentlyRm(pkg.path, false, top, next)
}
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