node 模块 fs-extra

TOC

• fs模块的扩展，提供了更多便利的 API，并继承了 1、复制文件

  copy(src, dest, [options], callback)

  示例：

  var fs = require('fs-extra');
  
  fs.copy('/tmp/myfile', '/tmp/mynewfile', function(err) {
    if (err) return console.error(err)
    console.log("success!")
  });
  
  fs.copy('/tmp/mydir', '/tmp/mynewdir', function(err) {
    if (err) return console.error(err)
    console.log("success!")
  });

  2、创建文件、目录

  ensureFile(file, callback)
  createFile(file, callback)
  createFileSync(file),
  ensureFileSync(file)
  ensureDir(dir, callback)
  ensureDirSync(dir)

  示例：

  var fs = require('fs-extra');
  
  var file = '/tmp/this/path/does/not/exist/file.txt'
  fs.ensureFile(file, function(err) {
    console.log(err) // => null 
    //file has now been created, including the directory it is to be placed in 
  });
  
  var dir = '/tmp/this/path/does/not/exist'
  fs.ensureDir(dir, function(err) {
    console.log(err) // => null 
    //dir has now been created, including the directory it is to be placed in 
  });

  3、移动文件、目录

  move(src, dest, [options], callback)

  示例：

  var fs = require('fs-extra')
  
  fs.move('/tmp/somefile', '/tmp/does/not/exist/yet/somefile', function(err) {
    if (err) return console.error(err)
    console.log("success!")
  })

  4、写入文件

  outputFile(file, data, callback)

  示例：

  var fs = require('fs-extra')
  var file = '/tmp/this/path/does/not/exist/file.txt'
  
  fs.outputFile(file, 'hello!', function(err) {
    console.log(err) // => null 
  
    fs.readFile(file, 'utf8', function(err, data) {
      console.log(data) // => hello! 
    })
  })

  5、删除文件、目录

  remove(dir, callback)

  示例：

  var fs = require('fs-extra')
  
  fs.remove('/tmp/myfile', function(err) {
    if (err) return console.error(err)
  
    console.log("success!")
  })
  
  fs.removeSync('/home/jprichardson')