fix: not install multi tseslint versions (#94)

The ts style guide typically depend on tseslint, so there's no need
to install it separately. Doing so might result in multiple versions
being installed, leading to errors.

fixes #97, #98

lib/config-generator.js

@@ -144,6 +144,13 @@ export class ConfigGenerator {
  this.answers.framework = "none";
  }
 
+ // tseslint should have been a dependency in the shared configs
+ // avoid install tseslint - it may install multi tseslint versions
+ // see https://github.com/eslint/create-config/issues/97
+ if (this.answers.styleguide && this.answers.language === "typescript") {
+ this.answers.language = "javascript";
+ }
+
  let importContent = "";
  const helperContent = `import path from "path";
 import { fileURLToPath } from "url";

tests/__snapshots__/style-esm-none-xo-typescript

@@ -1,6 +1,5 @@
 {
  "configContent": "import globals from "globals";
-import tseslint from "typescript-eslint";
 
 import path from "path";
 import { fileURLToPath } from "url";
@@ -15,7 +14,6 @@ const compat = new FlatCompat({baseDirectory: __dirname, recommendedConfig: plug
 export default [
  {languageOptions: { globals: globals.browser }},
  ...compat.extends("xo-typescript"),
- ...tseslint.configs.recommended,
 ];",
  "configFilename": "eslint.config.mjs",
  "devDependencies": [
@@ -26,7 +24,6 @@ export default [
  "@typescript-eslint/parser@>=7.0.2",
  "eslint@>=8.56.0",
  "typescript@>=5.0.0",
- "typescript-eslint",
  "@eslint/eslintrc",
  "@eslint/js",
  ],