eslint_fix.js

const fs = require('fs');

fs.readFile('eslintlog.json', 'utf8', (err, data) => {
  if (err) throw err;

  let parsed = JSON.parse(data);

  grabWarnings(parsed)
    .forEach(generateCmd);
});

/**
 * Grab warnings from eslint json results
 * @param eslintResults
 */
function grabWarnings(eslintResults) {
  return eslintResults.filter(result => {
    return result.warningCount !== 0
  }).map(result => {
      const convertedResult = {
        filePath: result.filePath,
        lines: {}
      };

      result.messages.forEach(msg => {
        if (!convertedResult.lines[msg.line]) {
          convertedResult.lines[msg.line] = [];
        }
        convertedResult.lines[msg.line].push(msg.ruleId);
      });
      return convertedResult;
    })
}

/**
 * Generate bash cmd from grabbed results
 * @param result
 */
function generateCmd(result) {
  let changeCounter = 0;

  for (let line in result.lines) {
    let insertedLine = parseInt(line) + changeCounter;
    let str = `// eslint-disable-next-line ${removeDuplicatesFromArray(result.lines[line]).join(", ")}`;
    // GENERATE sed COMMAND
    console.log(`sed -i '${insertedLine}  i  ${str} \' ${result.filePath}`);
    changeCounter += 1;
  }
}

/**
 * Utils.
 * @param arra1
 * @returns {Array}
 */
function removeDuplicatesFromArray(arra1) {
  let i,
    len = arra1.length,
    result = [],
    obj = {};

  for (i = 0; i < len; i++) {
    obj[arra1[i]] = 0;
  }
  for (i in obj) {
    result.push(i);
  }
  return result;
}

/* result
    sed -i '23  i  // eslint-disable-next-line prefer-template ' C:\..tricks.js
    sed -i '36  i  // eslint-disable-next-line prefer-template ' C:\..tricks.js
    sed -i '79  i  // eslint-disable-next-line no-useless-escape no-useless-escape ' C:\..validators.js
*/