chushihua

node_modules/fs-extra/lib/copy.js

@@ -0,0 +1,99 @@
+var fs = require('graceful-fs')
+var path = require('path')
+var ncp = require('./_copy').ncp
+var mkdir = require('./mkdir')
+var create = require('./create')
+
+var BUF_LENGTH = 64 * 1024
+var _buff = new Buffer(BUF_LENGTH)
+
+var copyFileSync = function(srcFile, destFile) {
+  var fdr = fs.openSync(srcFile, 'r')
+  var stat = fs.fstatSync(fdr)
+  var fdw = fs.openSync(destFile, 'w', stat.mode)
+  var bytesRead = 1
+  var pos = 0
+
+  while (bytesRead > 0) {
+    bytesRead = fs.readSync(fdr, _buff, 0, BUF_LENGTH, pos)
+    fs.writeSync(fdw, _buff, 0, bytesRead)
+    pos += bytesRead
+  }
+
+  fs.closeSync(fdr)
+  fs.closeSync(fdw)
+}
+
+function copy(src, dest, options, callback) {
+  if( typeof options == "function" && !callback) {
+    callback = options
+    options = {}
+  } else if (typeof options == "function" || options instanceof RegExp) {
+    options = {filter: options}
+  }
+  callback = callback || function(){}
+
+  fs.lstat(src, function(err, stats) {
+    if (err) return callback(err)
+
+    var dir = null
+    if (stats.isDirectory()) {
+      var parts = dest.split(path.sep)
+      parts.pop()
+      dir = parts.join(path.sep)
+    } else {
+      dir = path.dirname(dest)
+    }
+
+    fs.exists(dir, function(dirExists) {
+      if (dirExists) return ncp(src, dest, options, callback)
+      mkdir.mkdirs(dir, function(err) {
+        if (err) return callback(err)
+        ncp(src, dest, options, callback)
+      })
+    })
+  })
+}
+
+function copySync(src, dest, options) {
+  if (typeof options == "function" || options instanceof RegExp) {
+    options = {filter: options}
+  }
+
+  options = options || {}
+  options.recursive = !!options.recursive
+
+  options.filter = options.filter || function() { return true }
+
+  var stats = options.recursive ? fs.lstatSync(src) : fs.statSync(src)
+  var destFolder = path.dirname(dest)
+  var destFolderExists = fs.existsSync(destFolder)
+  var performCopy = false
+
+  if (stats.isFile()) {
+    if (options.filter instanceof RegExp) performCopy = options.filter.test(src)
+    else if (typeof options.filter == "function") performCopy = options.filter(src)
+
+    if (performCopy) {
+      if (!destFolderExists) mkdir.mkdirsSync(destFolder)
+      copyFileSync(src, dest)
+    }
+  }
+  else if (stats.isDirectory()) {
+    if (!fs.existsSync(dest)) mkdir.mkdirsSync(dest)
+    var contents = fs.readdirSync(src)
+    contents.forEach(function(content) {
+      copySync(path.join(src, content), path.join(dest, content), {filter: options.filter, recursive: true})
+    })
+  }
+  else if (options.recursive && stats.isSymbolicLink()) {
+    var srcPath = fs.readlinkSync(src)
+    fs.symlinkSync(srcPath, dest)
+  }
+}
+
+module.exports = {
+  copy: copy,
+  copySync: copySync
+}
+