New: CLIEngine#getRules() (refs eslint#6582)

docs/developer-guide/nodejs-api.md

@@ -678,12 +678,32 @@ var cli = new CLIEngine({
     }
 });
 
+
 // lint myfile.js and all files in lib/
 var report = cli.executeOnFiles(["myfile.js", "lib/"]);
 
 // output fixes to disk
 CLIEngine.outputFixes(report);
 ```
+### getRules()
+
+This method returns a map of all loaded rules. Under the hood, it calls [Linter#getRules](#lintergetrules).
+
+```js
+const CLIEngine = require("eslint").CLIEngine;
+const cli = new CLIEngine();
+
+cli.getRules();
+
+/*
+Map {
+  'accessor-pairs' => { meta: { docs: [Object], schema: [Array] }, create: [Function: create] },
+  'array-bracket-newline' => { meta: { docs: [Object], schema: [Array] }, create: [Function: create] },
+  ...
+}
+*/
+```
+
 
 ### CLIEngine.version
 

lib/cli-engine.js

@@ -428,6 +428,11 @@ class CLIEngine {
         this.config = new Config(this.options, this.linter);
     }
 
+
+    getRules() {
+        return this.linter.getRules();
+    }
+
     /**
      * Returns results that only contains errors.
      * @param {LintResult[]} results The results to filter.

tests/lib/cli-engine.js

@@ -138,7 +138,7 @@ describe("CLIEngine", () => {
             assert.equal(report.results[0].fixableWarningCount, 0);
         });
 
-        it("should report the toatl and per file warnings when using local cwd .eslintrc", () => {
+        it("should report the total and per file warnings when using local cwd .eslintrc", () => {
 
             engine = new CLIEngine({
                 rules: {
@@ -2811,6 +2811,15 @@ describe("CLIEngine", () => {
 
     });
 
+    describe("getRules()", () => {
+        it("should expose the list of rules", () => {
+            const engine = new CLIEngine();
+
+            assert.isTrue(engine.getRules().has("no-eval"), "no-eval is present");
+
+        });
+    });
+
     describe("resolveFileGlobPatterns", () => {
 
         leche.withData([