replace_in_dsl.js

'use strict';
/******************************************************************************/
const path = process.argv[2];
if (!path) {
  console.log('Add the file path, please.');
  process.exit();
}
/******************************************************************************/
const fs = require('fs');

const rl = require('readline').createInterface({
  input: fs.createReadStream(path, {encoding: 'utf16le'}), //ascii utf8 utf16le
  terminal: false,
  historySize: 0
});

const outfile =  fs.openSync(path.replace(/(\.[^.]+)?$/, '.new$1'), 'w');

const isDirective = /^#/;
const isHeadword  = /^[^#\s]/;
const isBody      = /^\s+\S/;

const directiveRE = /^#ICON_FILE.+/;
const headwordRE  = /\w+/g;
const bodyRE      = /\[m(\d)\]/g;

const exceptions = ['ABBYY'];
/******************************************************************************/
rl.on('line', line => {
	if (isDirective.test(line)) {
	  line = line.replace(directiveRE, '');
	} else if (isHeadword.test(line)) {
	  line = line.replace(headwordRE, mtch => {
	    if (exceptions.indexOf(mtch) === -1) {
	      return mtch.toLowerCase();
	    } else {
	      return mtch;
	    }
	  });
	} else if (isBody.test(line)) {
	  line = line.replace(bodyRE, (mtch, num) => {
	    return `[m${++num}]`;
	  });
	}
	fs.writeSync(outfile, `${line}\n`, null, 'utf16le');
});
/******************************************************************************/