getNewRules.js

// Copyright 2016 Kevin Partington. Licensed freely to the public domain.
// N.B. You will need to run this in the root of an ESLint repository.
var path = require("path");
var semver = require("semver");
var shelljs = require("shelljs");

if (process.argv.length < 3) {
	console.error("Must specify ESLint version");
	console.error("Usage: " + process.argv.slice(0, 2).join(" ") + " VERSION");
	return 1;
}

var sinceVersion = semver.valid(process.argv[2]);

if (!sinceVersion) {
	console.error("Invalid ESLint version (must be semver-compliant)");
	console.error("Usage: " + process.argv.slice(0, 2).join(" ") + " VERSION");
	return 1;
}

function execSilent(command) {
	return shelljs.exec(command, { silent: true }).output;
}

shelljs.find("./lib/rules").forEach(function (file) {
	if (shelljs.test("-f", file) && path.extname(file) === ".js") {
		var commits = execSilent("git rev-list HEAD -- " + file)
			.trim()
			.split("\n");

		var firstCommit = commits[commits.length - 1].trim();

		var tags = execSilent("git tag --contains " + firstCommit)
			.trim()
			.split("\n");

		var firstTag = tags.filter(function (version) {
			version = semver.valid(version.trim());
			return version;
		}).sort(semver.compare)[0];

		if (semver.gt(firstTag, sinceVersion)) {
			console.log(file + ": " + firstTag);
		}
	}
});