fix(vite-node): circular imports (#3196)

packages/vite-node/src/client.ts

@@ -188,22 +188,31 @@ export class ViteNodeRunner {
     if (importee)
       mod.importers.add(importee)
 
-    // the callstack reference itself circularly
-    if (callstack.includes(fsPath) && mod.exports)
-      return mod.exports
+    const getStack = () => `stack:\n${[...callstack, fsPath].reverse().map(p => `  - ${p}`).join('\n')}`
 
-    // cached module
-    if (mod.promise)
-      return mod.promise
+    // check circular dependency
+    if (callstack.includes(fsPath) || callstack.some(c => this.moduleCache.get(c).importers?.has(fsPath))) {
+      if (mod.exports)
+        return mod.exports
+    }
 
-    const promise = this.directRequest(id, fsPath, callstack)
-    Object.assign(mod, { promise, evaluated: false })
+    let debugTimer: any
+    if (this.debug)
+      debugTimer = setTimeout(() => console.warn(`[vite-node] module ${fsPath} takes over 2s to load.\n${getStack()}`), 2000)
 
     try {
+      // cached module
+      if (mod.promise)
+        return await mod.promise
+
+      const promise = this.directRequest(id, fsPath, callstack)
+      Object.assign(mod, { promise, evaluated: false })
       return await promise
     }
     finally {
       mod.evaluated = true
+      if (debugTimer)
+        clearTimeout(debugTimer)
     }
   }
 
@@ -245,28 +254,7 @@ export class ViteNodeRunner {
 
   /** @internal */
   async dependencyRequest(id: string, fsPath: string, callstack: string[]) {
-    const getStack = () => {
-      return `stack:\n${[...callstack, fsPath].reverse().map(p => `- ${p}`).join('\n')}`
-    }
-
-    let debugTimer: any
-    if (this.debug)
-      debugTimer = setTimeout(() => console.warn(() => `module ${fsPath} takes over 2s to load.\n${getStack()}`), 2000)
-
-    try {
-      if (callstack.includes(fsPath)) {
-        const depExports = this.moduleCache.get(fsPath)?.exports
-        if (depExports)
-          return depExports
-        throw new Error(`[vite-node] Failed to resolve circular dependency, ${getStack()}`)
-      }
-
-      return await this.cachedRequest(id, fsPath, callstack)
-    }
-    finally {
-      if (debugTimer)
-        clearTimeout(debugTimer)
-    }
+    return await this.cachedRequest(id, fsPath, callstack)
   }
 
   /** @internal */

test/vite-node/src/circular2/a.ts

@@ -0,0 +1,5 @@
+import { c } from './reg'
+
+await new Promise(resolve => setTimeout(resolve, 10))
+
+export const a = `a${c}`

test/vite-node/src/circular2/b.ts

@@ -0,0 +1,6 @@
+// eslint-disable-next-line unused-imports/no-unused-imports
+import { a } from './a'
+
+await new Promise(resolve => setTimeout(resolve, 10))
+
+export const b = 'b'

test/vite-node/src/circular2/c.ts

@@ -0,0 +1,3 @@
+export const c = 'c'
+
+await new Promise(resolve => setTimeout(resolve, 10))

test/vite-node/src/circular2/index.ts

@@ -0,0 +1,11 @@
+/* eslint-disable no-console */
+import { a } from './a'
+import { b } from './b'
+
+/**
+ * index -> a -> b
+ *          ^   ^v
+ *            reg -> c
+ */
+
+console.log(a, b)

test/vite-node/src/circular2/reg.ts

@@ -0,0 +1,6 @@
+export { a } from './a'
+
+await new Promise(resolve => setTimeout(resolve, 20))
+
+export { b } from './b'
+export { c } from './c'

test/vite-node/test/circular.test.ts

@@ -1,13 +1,17 @@
-import { describe, expect, test } from 'vitest'
+import { expect, test } from 'vitest'
 import { execa } from 'execa'
 import { resolve } from 'pathe'
 
 const cliPath = resolve(__dirname, '../../../packages/vite-node/src/cli.ts')
-const entryPath = resolve(__dirname, '../src/circular/index.ts')
 
-describe('circular', async () => {
-  test('should works', async () => {
-    const result = await execa('npx', ['esno', cliPath, entryPath], { reject: true })
-    expect(result.stdout).toMatchInlineSnapshot('"A Bindex index"')
-  }, 60_000)
-})
+test('circular 1', async () => {
+  const entryPath = resolve(__dirname, '../src/circular1/index.ts')
+  const result = await execa('npx', ['esno', cliPath, entryPath], { reject: true })
+  expect(result.stdout).toMatchInlineSnapshot('"A Bindex index"')
+}, 60_000)
+
+test('circular 2', async () => {
+  const entryPath = resolve(__dirname, '../src/circular2/index.ts')
+  const result = await execa('npx', ['esno', cliPath, entryPath], { reject: true })
+  expect(result.stdout).toMatchInlineSnapshot('"ac b"')
+}, 60_000)