使用 node.js 查看文件夹中的更改，并在更改时打印文件路径
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Watch a folder for changes using node.js, and print file paths when they are changed
提问by Anderson Green
I'm trying to write a node.js script that watches for changes in a directory of files, and then prints the files that are changed. How can I modify this script so that it watches a directory (instead of an individual file), and prints the names of the files in the directory as they are changed?
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），并在目录中的文件更改时打印它们的名称？
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?
});
回答by mtsr
Try Chokidar:
尝试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 solves some of the crossplatform issues with watching files using just fs.
Chokidar 解决了仅使用 fs 观看文件的一些跨平台问题。
回答by Kaushik Evani
Why not just use the old fs.watch? Its pretty straightforward.
为什么不使用旧的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);
})
For more info and details about the options param, see Node fs Docs
有关 options 参数的更多信息和详细信息，请参阅Node fs Docs
回答by Sharathi RB
try hound:
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()
It will execute once file was change
一旦文件更改，它将执行
