1 files changed, 96 insertions, 0 deletions
diff --git a/deps/node/deps/npm/lib/install/action/move.js b/deps/node/deps/npm/lib/install/action/move.js
new file mode 100644
index 00000000..00d58a15
--- /dev/null
+++ b/deps/node/deps/npm/lib/install/action/move.js
@@ -0,0 +1,96 @@
+'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 move = require('../../utils/move.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, { failOk: true }],
+    [lifecycle, pkg.package, 'uninstall', pkg.fromPath, { failOk: true }],
+    [rmStuff, pkg.package, pkg.fromPath],
+    [lifecycle, pkg.package, 'postuninstall', pkg.fromPath, { failOk: true }],
+    [moveModuleOnly, pkg.fromPath, pkg.path, log],
+    [lifecycle, pkg.package, 'preinstall', pkg.path, { failOk: true }],
+    [removeEmptyParents, path.resolve(pkg.fromPath, '..')]
+  ], 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)
+
+  move(toModules, tempToModules).then(removeDestination(done), 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)
+      move(tempToModules, toModules).then(next, done)
+    }
+  }
+
+  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)
+      move(fromModules, tempFromModules).then(doMove(moveNodeModulesBack(next)), doMove(next))
+    }
+  }
+
+  function doMove (next) {
+    return function () {
+      log.silly('move', 'move module dir to final dest', from, to)
+      move(from, to).then(next, done)
+    }
+  }
+
+  function moveNodeModulesBack (next) {
+    return function () {
+      mkdirp(from, iferr(done, function () {
+        log.silly('move', 'put source node_modules back', fromModules)
+        move(tempFromModules, fromModules).then(next, done)
+      }))
+    }
+  }
+}