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'use strict'
var fs = require('graceful-fs')
var path = require('path')
var chain = require('slide').chain
var iferr = require('iferr')
var rimraf = require('rimraf')
var mkdirp = require('mkdirp')
var rmStuff = require('../../unbuild.js').rmStuff
var lifecycle = require('../../utils/lifecycle.js')
var updatePackageJson = require('../update-package-json.js')
var rename = require('../../utils/rename.js')
/*
Move a module from one point in the node_modules tree to another.
Do not disturb either the source or target location's node_modules
folders.
*/
module.exports = function (staging, pkg, log, next) {
log.silly('move', pkg.fromPath, pkg.path)
chain([
[lifecycle, pkg.package, 'preuninstall', pkg.fromPath, false, true],
[lifecycle, pkg.package, 'uninstall', pkg.fromPath, false, true],
[rmStuff, pkg.package, pkg.fromPath],
[lifecycle, pkg.package, 'postuninstall', pkg.fromPath, false, true],
[moveModuleOnly, pkg.fromPath, pkg.path, log],
[lifecycle, pkg.package, 'preinstall', pkg.path, false, true],
[removeEmptyParents, path.resolve(pkg.fromPath, '..')],
[updatePackageJson, pkg, pkg.path]
], next)
}
function removeEmptyParents (pkgdir, next) {
fs.rmdir(pkgdir, function (er) {
// FIXME: Make sure windows does what we want here
if (er && er.code !== 'ENOENT') return next()
removeEmptyParents(path.resolve(pkgdir, '..'), next)
})
}
function moveModuleOnly (from, to, log, done) {
var fromModules = path.join(from, 'node_modules')
var tempFromModules = from + '.node_modules'
var toModules = path.join(to, 'node_modules')
var tempToModules = to + '.node_modules'
log.silly('move', 'move existing destination node_modules away', toModules)
rename(toModules, tempToModules, removeDestination(done))
function removeDestination (next) {
return function (er) {
log.silly('move', 'remove existing destination', to)
if (er) {
rimraf(to, iferr(next, makeDestination(next)))
} else {
rimraf(to, iferr(next, makeDestination(iferr(next, moveToModulesBack(next)))))
}
}
}
function moveToModulesBack (next) {
return function () {
log.silly('move', 'move existing destination node_modules back', toModules)
rename(tempToModules, toModules, iferr(done, next))
}
}
function makeDestination (next) {
return function () {
log.silly('move', 'make sure destination parent exists', path.resolve(to, '..'))
mkdirp(path.resolve(to, '..'), iferr(done, moveNodeModules(next)))
}
}
function moveNodeModules (next) {
return function () {
log.silly('move', 'move source node_modules away', fromModules)
rename(fromModules, tempFromModules, iferr(doMove(next), doMove(moveNodeModulesBack(next))))
}
}
function doMove (next) {
return function () {
log.silly('move', 'move module dir to final dest', from, to)
rename(from, to, iferr(done, next))
}
}
function moveNodeModulesBack (next) {
return function () {
mkdirp(from, iferr(done, function () {
log.silly('move', 'put source node_modules back', fromModules)
rename(tempFromModules, fromModules, iferr(done, next))
}))
}
}
}
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