feat: allow config option to be false (#2749)

Author: antfu

packages/vitest/src/node/cache/index.ts

@@ -27,13 +27,17 @@ export class VitestCache {
   static async clearCache(options: CliOptions) {
     const root = resolve(options.root || process.cwd())
 
-    const configPath = options.config
-      ? resolve(root, options.config)
-      : await findUp(configFiles, { cwd: root } as any)
+    const configPath = options.config === false
+      ? false
+      : options.config
+        ? resolve(root, options.config)
+        : await findUp(configFiles, { cwd: root } as any)
 
-    const config = await loadConfigFromFile({ command: 'serve', mode: 'test' }, configPath)
+    const config = configPath
+      ? (await loadConfigFromFile({ command: 'serve', mode: 'test' }, configPath))?.config
+      : undefined
 
-    const cache = config?.config.test?.cache
+    const cache = config?.test?.cache
 
     if (cache === false)
       throw new Error('Cache is disabled')

packages/vitest/src/node/create.ts

@@ -11,9 +11,11 @@ export async function createVitest(mode: VitestRunMode, options: UserConfig, vit
   const ctx = new Vitest(mode)
   const root = resolve(options.root || process.cwd())
 
-  const configPath = options.config
-    ? resolve(root, options.config)
-    : await findUp(configFiles, { cwd: root } as any)
+  const configPath = options.config === false
+    ? false
+    : options.config
+      ? resolve(root, options.config)
+      : await findUp(configFiles, { cwd: root } as any)
 
   const config: ViteInlineConfig = {
     logLevel: 'error',

packages/vitest/src/types/config.ts

@@ -563,8 +563,10 @@ export interface UserConfig extends InlineConfig {
    * Path to the config file.
    *
    * Default resolving to `vitest.config.*`, `vite.config.*`
+   *
+   * Setting to `false` will disable config resolving.
    */
-  config?: string | undefined
+  config?: string | false | undefined
 
   /**
    * Use happy-dom