node.js - 使用 node.js 监视文件夹的更改，并在更改时打印文件路径

Question

我正在尝试编写一个 node.js 脚本来监视文件目录中的更改，然后打印更改的文件。如何修改此脚本以使其监视目录（而不是单个文件），并在更改时打印目录中文件的名称？

var fs = require('fs'),
    sys = require('sys');
var file = '/home/anderson/Desktop/fractal.png'; //this watches a file, but I want to watch a directory instead
fs.watchFile(file, function(curr, prev) {
    alert("File was modified."); //is there some way to print the names of the files in the directory as they are modified?
});

Answer 1

试试Chokidar：

var chokidar = require('chokidar');

var watcher = chokidar.watch('file or dir', {ignored: /^\./, persistent: true});

watcher
  .on('add', function(path) {console.log('File', path, 'has been added');})
  .on('change', function(path) {console.log('File', path, 'has been changed');})
  .on('unlink', function(path) {console.log('File', path, 'has been removed');})
  .on('error', function(error) {console.error('Error happened', error);})

Chokidar 仅使用 fs 解决了一些跨平台问题。

Answer 2

为什么不只使用旧的fs.watch？它非常简单。

fs.watch('/path/to/folder', (eventType, filename) => {
console.log(eventType);
// could be either 'rename' or 'change'. new file event and delete
// also generally emit 'rename'
console.log(filename);
})

有关选项参数的更多信息和详细信息，请参阅Node fs Docs

Answer 3

尝试猎犬：

hound = require('hound')

// Create a directory tree watcher.
watcher = hound.watch('/tmp')

// Create a file watcher.
watcher = hound.watch('/tmp/file.txt')

// Add callbacks for file and directory events.  The change event only applies
// to files.
watcher.on('create', function(file, stats) {
  console.log(file + ' was created')
})
watcher.on('change', function(file, stats) {
  console.log(file + ' was changed')
})
watcher.on('delete', function(file) {
  console.log(file + ' was deleted')
})

// Unwatch specific files or directories.
watcher.unwatch('/tmp/another_file')

// Unwatch all watched files and directories.
watcher.clear()

一旦文件被更改，它将执行