lint.js

const fs = require('fs');
const CLIEngine = require('eslint').ESLint;

const argv = process.argv.slice(2);
const cli = new CLIEngine({
  fix: false,
  extensions: argv[2].split(','),
  useEslintrc: true,
});

console.log('Starting to lint..');

// Lint all files
const report = cli.lintFiles(argv[0]);

// get the default formatter
const consoleFormatter = cli.loadFormatter();

console.log('Lint finished');

// output to console
console.log(consoleFormatter(report.results));

// Output to sarif format
const otherFormatter = cli.loadFormatter(
  '@microsoft/eslint-formatter-sarif/sarif.js',
);

console.log('Saving sarif report..');

const filePath = argv[4] ? argv[4] : 'lint-results.sarif';

fs.writeFile(filePath, otherFormatter(report.results), 'utf8', () => {
  console.log('Sarif report saved');
  if (report.errorCount > 0) {
    console.log('Errors found, exiting..');
    process.exit(1);
  } else {
    console.log('No errors found');
    process.exit(0);
  }
});