lint.js

#!/usr/bin/env node

var MAX_ISSUES = 1000;

var CliEngine = require('eslint').CLIEngine;
var exec = require('child_process').exec;

var cli = new CliEngine();
var formatter = cli.getFormatter('stylish');

var report = cli.executeOnFiles(['**/*.js']);
var currentIssuesCount = report.errorCount + report.warningCount;

if (currentIssuesCount > MAX_ISSUES) {
  console.log('Warning limit exceeded: ' + currentIssuesCount + '.');
  console.log('Keep amount of warnings from eslint below ' + MAX_ISSUES + '.\n');

  console.log('Errors in changed files: ');
  exec('git diff --name-only master', function(_, stdout) {
    var changedFiles = stdout.toString().split('\n').filter(function(filename) {
      return filename.match(/\.js$/);
    });

    var reportOnChangesFiles = cli.executeOnFiles(changedFiles);
    console.log(formatter(reportOnChangesFiles.results));
    process.exit(1);
  });
}