update_readme

#!/usr/bin/env node
// Code to update README.md file with a bookmarlet
// generated from src/score.js.
//
// 1. Change whatever you need in src/score.js
// 2. Run bin/update/readme
// 3. Test, commit, push, whatever.
//
const fs = require('fs');
const source_code = fs.readFileSync('src/score.js', 'utf8');
const bookmarlet = generateBookmarlet(source_code);

const readme = fs.readFileSync('README.md', 'utf8');
const updated_readme = readme.replace(/javascript:.*/, bookmarlet);

fs.writeFileSync('README.md', updated_readme);

function generateBookmarlet(str) {
  // Quick & dirty "minimize" and bookmarlet generation
  // without external libraries.
  // It'd break any "complex" code but it suffices for src/score.js

  function removeSingleLineComments(str) {
    return str.replace(/\/\/.*/g, '');
  }

  function squashSpaces(str) {
    const re = /\s\s/g;
    while (str.match(re)) {
      str = str.replace(re, '');
    }
    str = str.replace(/ =/g, '=');
    str = str.replace(/= /g, '=');
    return str;
  }

  function removeMultiLineComments(str) {
    return str.replace(/\/\*.*?\*\//g, '');
  }

  str = removeSingleLineComments(str);
  str = squashSpaces(str);
  str = removeMultiLineComments(str);
  return 'javascript:' + str;
}