Runs ESLint with every rule enabled, prints sorted list of number of violations of each rule

audit-eslint-rules.js

#!/usr/bin/env node
/* eslint-disable */

var fs = require("fs");
var glob = require("glob");
var linter = require("eslint").linter;

var SOURCES = glob.sync("frontend/src/**/*.js*");

var ESLINT_RULES = Object.keys(require('eslint/conf/eslint.json').rules);
var ESLINT_REACT_RULES = Object.keys(require('eslint-plugin-react').rules);
var ALL_RULES = [].concat(ESLINT_RULES, ESLINT_REACT_RULES)

console.log("files", SOURCES.length, "rules", ALL_RULES.length);

var config = JSON.parse(fs.readFileSync(".eslintrc"));
config.rules = {}
for (var rule of ESLINT_RULES) {
    config.rules[rule] = 2;
}

var ruleCounts = {}
for (var file of SOURCES) {
    var code = fs.readFileSync(file, "utf-8");
    var messages = linter.verify(code, config, { filename: file, allowInlineConfig: false });
    for (var message of messages) {
        ruleCounts[message.ruleId] = (ruleCounts[message.ruleId] || 0) + 1;
    }
    console.log(file, messages.length);
}

Object.keys(ruleCounts)
    .map(ruleId => [ruleId, ruleCounts[ruleId]])
    .sort((a,b) => a[1] - b[1])
    .forEach((rule) => console.log(rule[1], rule[0]));