Small script to use with https://github.com/maicki/why-did-you-update

parsingFromLog.js

/*
 * this is a small script to transform a log saved from the chrome dev tools
 * into easy to use CSV, starting from what
 * https://github.com/maicki/why-did-you-update
 * produces, basically.
 * 
 * If it doesn't work for you, make sure L32-33 are set properly for your export
 *
 * use by running:
 * node parsingFromLog.js <name of log>.log
 * 
 * v0.1
 * Author: @kelset
 */

if (process.argv.length <= 2) {
  console.log('Yo, give me a log to read');
  process.exit(-1);
}

const fs = require('fs');

const logToAnalyze = process.argv[2];

const reRenderedElements = [];

fs.readFile(logToAnalyze, 'utf8', function(err, contents) {
  // now let's read by line
  const logLines = contents.split('\n');

  logLines.forEach(logLine => {
    const logLineElements = logLine.split(' ');

    if (
      logLineElements[0] === 'index.android.bundle:227995' ||
      logLineElements[0] === 'defaultNotifier.js:11'
    ) {
      // then I know that the second item is one I need to count
      reRenderedElements[logLineElements[1]] = reRenderedElements[
        logLineElements[1]
      ]
        ? reRenderedElements[logLineElements[1]] + 1
        : 1;
    }
  });

  // need to turn it into a string
  let stringForCSV = '';
  for (let key in reRenderedElements) {
    stringForCSV += `${key},${reRenderedElements[key]}\n`;
  }

  // now I can write to CSV
  fs.writeFile(
    `list-for-${process.argv[2]}.csv`,
    stringForCSV,
    'utf8',
    function(err) {
      if (err) {
        console.log(
          'Some error occured - file either not saved or corrupted file saved.'
        );
      } else {
        console.log("It's saved!");
      }
    }
  );
});