chore: have uniqe ids for cache

packages/vitest/src/node/pools/rpc.ts

@@ -33,12 +33,11 @@ export function createMethodsRPC(project: WorkspaceProject): RuntimeRPC {
       if (!result.code && 'id' in result)
         return result
 
-      if (!result.code) {
-        console.error(result)
-        return { code: `throw new Error('What is going on?')` }
-      }
+      if (!result.code)
+        throw new Error(`Failed to fetch module ${id}`)
+
       const code = result.code
-      const dir = join(tmpdir(), transformMode)
+      const dir = join(tmpdir(), project.id, transformMode)
       const tmp = join(dir, id.replace(/[/\\?%*:|"<>]/g, '_').replace('\0', '__x00__'))
       if (promises.has(tmp)) {
         await promises.get(tmp)

packages/vitest/src/node/workspace.ts

@@ -8,10 +8,10 @@ import { ViteNodeServer } from 'vite-node/server'
 import c from 'picocolors'
 import { createBrowserServer } from '../integrations/browser/server'
 import type { ProvidedContext, ResolvedConfig, UserConfig, UserWorkspaceConfig, Vitest } from '../types'
-import { deepMerge } from '../utils'
 import type { Typechecker } from '../typecheck/typechecker'
 import type { BrowserProvider } from '../types/browser'
 import { getBrowserProvider } from '../integrations/browser'
+import { deepMerge, nanoid } from '../utils/base'
 import { isBrowserEnabled, resolveConfig } from './config'
 import { WorkspaceVitestPlugin } from './plugins/workspace'
 import { createViteServer } from './vite'
@@ -78,6 +78,8 @@ export class WorkspaceProject {
 
   testFilesList: string[] | null = null
 
+  public readonly id = nanoid()
+
   private _globalSetups: GlobalSetupFile[] | undefined
   private _provided: ProvidedContext = {} as any
 

packages/vitest/src/utils/base.ts

@@ -169,3 +169,14 @@ export function escapeRegExp(s: string) {
 export function wildcardPatternToRegExp(pattern: string): RegExp {
   return new RegExp(`^${pattern.split('*').map(escapeRegExp).join('.*')}$`, 'i')
 }
+
+// port from nanoid
+// https://github.com/ai/nanoid
+const urlAlphabet
+  = 'useandom-26T198340PX75pxJACKVERYMINDBUSHWOLF_GQZbfghjklqvwyzrict'
+export function nanoid(size = 21) {
+  let id = ''
+  let i = size
+  while (i--) id += urlAlphabet[(Math.random() * 64) | 0]
+  return id
+}