encode.js

/**
 * UTF-8 から SJIS に一括変換するスクリプト
 */

const fs = require('fs');

const glob = require('glob');
const iconv = require('iconv');

const pattern = './assets/**/*';
const files = glob.sync(pattern).filter((file) => fs.statSync(file).isFile());

files.forEach((file) => {
  const conv = new iconv.Iconv('UTF-8', 'SHIFT_JIS');
  const filein = fs.createReadStream(file);
  const fileout = fs.createWriteStream(file);
  filein
  .pipe(conv)
  .pipe(fileout);
});