fix: support configs with @typescript-eslint type-checking rules

While the ESLint api provides `executeOnText`, type checking services
that power some of rules offered by `@typescript-eslint` use TypeScript,
which requires a file on disk.

Additionally, both ESLint & `@typescript-eslint` include `node_modules`
in their default ignores, so we need to explicitly un-ignore our blank
file as well as prevent ESLint from using any `.eslintignore` files that
might exist.

Author: G-Rath

src/blank.js

@@ -0,0 +1 @@
+#! blank file used as an ignore for eslint, and as a js file for @typescript-eslint

src/rules/utils.ts

@@ -2,6 +2,8 @@ import ESLint from 'eslint';
 import requireRelative from 'require-relative';
 import { runInNewContext } from 'vm';
 
+const pathToBlankFile = require.resolve('../blank.js');
+
 const getsertCache = <T>(
   cache: Map<string, T>,
   key: string,
@@ -54,13 +56,16 @@ const createCLIEngine = (config: ESLint.Linter.Config): ESLint.CLIEngine => {
     () =>
       new ESLint.CLIEngine({
         useEslintrc: false,
+        ignorePath: pathToBlankFile,
+        ignorePattern: ['!node_modules/*'],
         cache: false,
         envs: ['node'],
         baseConfig: {
           ...config,
           parserOptions: {
             ...config.parserOptions,
-            project: require.resolve('../../tsconfig.fake.json')
+            project: require.resolve('../../tsconfig.fake.json'),
+            projectFolderIgnoreList: []
           }
         }
       }),
@@ -343,7 +348,10 @@ const collectConfigInfoFromESLint = (
     }
 
     try {
-      const results = createCLIEngine(theConfig).executeOnText('');
+      const results = createCLIEngine(theConfig).executeOnText(
+        '',
+        pathToBlankFile
+      );
 
       return {
         deprecatedRules: results.usedDeprecatedRules,

test/src/rules/no-invalid-config.spec.ts

@@ -91,7 +91,7 @@ ruleTester.run('no-invalid-config', rule, {
           data: {
             message: dedent`
               Unable to parse error from ESLint: Error while loading rule 'prettier/erroneous-rule': explosions!
-              Occurred while linting <text>
+              Occurred while linting ${require.resolve('../../../src/blank.js')}
             `.trim()
           },
           line: 1,