refactor(create-cli): unify format definitions

Author: hanna-skryl

packages/create-cli/src/index.ts

@@ -1,6 +1,7 @@
 #! /usr/bin/env node
 import yargs from 'yargs';
 import { hideBin } from 'yargs/helpers';
+import { CONFIG_FILE_FORMATS } from './lib/setup/types.js';
 import { runSetupWizard } from './lib/setup/wizard.js';
 
 const argv = await yargs(hideBin(process.argv))
@@ -17,7 +18,7 @@ const argv = await yargs(hideBin(process.argv))
   })
   .option('config-format', {
     type: 'string',
-    choices: ['ts', 'js', 'mjs'],
+    choices: CONFIG_FILE_FORMATS,
     describe: 'Config file format (default: auto-detected from project)',
   })
   .parse();

packages/create-cli/src/lib/setup/config-format.ts

@@ -3,7 +3,11 @@ import { readdir } from 'node:fs/promises';
 import path from 'node:path';
 import type { PackageJson } from 'type-fest';
 import { fileExists, readJsonFile } from '@code-pushup/utils';
-import type { CliArgs, ConfigFileFormat } from './types.js';
+import {
+  CONFIG_FILE_FORMATS,
+  type CliArgs,
+  type ConfigFileFormat,
+} from './types.js';
 
 const TSCONFIG_PATTERN = /^tsconfig(\..+)?\.json$/;
 
@@ -61,5 +65,6 @@ async function detectDefaultFormat(targetDir: string): Promise<DefaultFormat> {
 function isConfigFileFormat(
   value: string | undefined,
 ): value is ConfigFileFormat {
-  return value === 'ts' || value === 'js' || value === 'mjs';
+  const validValues: readonly string[] = CONFIG_FILE_FORMATS;
+  return value != null && validValues.includes(value);
 }

packages/create-cli/src/lib/setup/types.ts

@@ -1,6 +1,7 @@
 import type { PluginMeta } from '@code-pushup/models';
 
-export type ConfigFileFormat = 'ts' | 'js' | 'mjs';
+export const CONFIG_FILE_FORMATS = ['ts', 'js', 'mjs'] as const;
+export type ConfigFileFormat = (typeof CONFIG_FILE_FORMATS)[number];
 
 /** Virtual file system that buffers writes in memory until flushed to disk. */
 export type Tree = {