rollup-plugin-watch/dist/plugin.js

A rollup plugin to specify directories and files to watch

'use strict';

var pluginutils = require('@rollup/pluginutils');
var fs = require('fs');
var path = require('path');
var process = require('process');

var index = (options = {}) => {
  const dir = options.dir;
  const filter = pluginutils.createFilter(options.include ?? [], options.exclude ?? []);
  return {
    name: "watch",
    buildStart() {
      const watch = (src) => {
        const filesToWatch = fs.readdirSync(src);
        for (let file of filesToWatch) {
          const fullPath = path.join(process.cwd(), src, file);
          const stats = fs.statSync(fullPath);
          if (!filter(fullPath)) continue;
          if (stats.isFile()) {
            this.addWatchFile(fullPath);
          } else if (stats.isDirectory()) {
            watch(fullPath);
          }
        }
      };
      watch(dir);
    }
  };
};

module.exports = index;