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Copy pathwatch.js
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53 lines (43 loc) · 1.25 KB
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const chokidar = require('chokidar');
const {log} = require('./utils');
const DEBOUNCE = 200;
/**
* @param {Object} options
* @param {string[]} options.files
* @param {(files: string[]) => void | Promise<void>} options.onChange
*/
function watch(options) {
const queue = new Set();
let timeoutId = null;
function onChange(path) {
queue.add(path);
if (timeoutId != null) {
return;
}
timeoutId = setTimeout(async () => {
timeoutId = null;
try {
const changedFiles = Array.from(queue).sort();
log.ok(`Files changed:${changedFiles.map((path) => `\n${path}`)}`);
queue.clear();
await options.onChange(changedFiles);
if (timeoutId) {
return;
}
} catch (err) {
log.error(err);
}
}, DEBOUNCE);
}
const watcher = chokidar.watch(options.files, {ignoreInitial: true})
.on('add', onChange)
.on('change', onChange)
.on('unlink', onChange);
function stop() {
watcher.close();
}
process.on('exit', stop);
process.on('SIGINT', stop);
return watcher;
}
module.exports = watch;