chushihua

node_modules/fs-extra/lib/move.js

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+// most of this code was written by Andrew Kelley
+// licensed under the BSD license: see
+// https://github.com/andrewrk/node-mv/blob/master/package.json
+
+// this needs a cleanup
+
+var fs = require('graceful-fs')
+var ncp = require('./_copy').ncp
+var path = require('path')
+var rimraf = require('rimraf')
+var mkdirp = require('./mkdir').mkdirs
+
+function mv(source, dest, options, callback){
+  if (typeof options === 'function') {
+    callback = options
+    options = {}
+  }
+
+  var shouldMkdirp = !!options.mkdirp
+  var clobber = options.clobber !== false
+  var limit = options.limit || 16
+
+  if (shouldMkdirp) {
+    mkdirs()
+  } else {
+    doRename()
+  }
+
+  function mkdirs() {
+    mkdirp(path.dirname(dest), function(err) {
+      if (err) return callback(err)
+      doRename()
+    })
+  }
+
+  function doRename() {
+    if (clobber) {
+      fs.rename(source, dest, function(err) {
+        if (!err) return callback()
+
+        if (err.code === 'ENOTEMPTY') {
+          rimraf(dest, function(err) {
+            if (err) return callback(err)
+            options.clobber = false // just clobbered it, no need to do it again
+            mv(source, dest, options, callback)
+          })
+          return
+        }
+
+        if (err.code !== 'EXDEV') return callback(err)
+        moveFileAcrossDevice(source, dest, clobber, limit, callback)
+      })
+    } else {
+      fs.link(source, dest, function(err) {
+        if (err) {
+          if (err.code === 'EXDEV') {
+            moveFileAcrossDevice(source, dest, clobber, limit, callback)
+            return
+          }
+          if (err.code === 'EISDIR' || err.code === 'EPERM') {
+            moveDirAcrossDevice(source, dest, clobber, limit, callback)
+            return
+          }
+          callback(err)
+          return
+        }
+        fs.unlink(source, callback)
+      })
+    }
+  }
+}
+
+function moveFileAcrossDevice(source, dest, clobber, limit, callback) {
+  var outFlags = clobber ? 'w' : 'wx'
+  var ins = fs.createReadStream(source)
+  var outs = fs.createWriteStream(dest, {flags: outFlags})
+
+  ins.on('error', function(err) {
+    ins.destroy()
+    outs.destroy()
+    outs.removeListener('close', onClose)
+
+    // may want to create a directory but `out` line above
+    // creates an empty file for us: See #108
+    // don't care about error here
+    fs.unlink(dest, function() {
+      // note: `err` here is from the input stream errror
+      if (err.code === 'EISDIR' || err.code === 'EPERM') {
+        moveDirAcrossDevice(source, dest, clobber, limit, callback)
+      } else {
+        callback(err)
+      }
+    })
+  })
+
+  outs.on('error', function(err) {
+    ins.destroy()
+    outs.destroy()
+    outs.removeListener('close', onClose)
+    callback(err)
+  })
+
+  outs.once('close', onClose)
+  ins.pipe(outs)
+
+  function onClose() {
+    fs.unlink(source, callback)
+  }
+}
+
+function moveDirAcrossDevice(source, dest, clobber, limit, callback) {
+  var options = {
+    stopOnErr: true,
+    clobber: false,
+    limit: limit,
+  }
+
+  function startNcp() {
+    ncp(source, dest, options, function(errList) {
+      if (errList) return callback(errList[0])
+      rimraf(source, callback)
+    })
+  }
+
+  if (clobber) {
+    rimraf(dest, function(err) {
+      if (err) return callback(err)
+      startNcp()
+    })
+  } else {
+    startNcp()
+  }
+}
+
+module.exports = mv
+