feat(vitest): expose execArgv to the different pools

docs/config/index.md

@@ -713,6 +713,17 @@ This can improve performance in some cases, but might cause segfault in older No
 
 Isolate environment for each test file.
 
+##### poolOptions.threads.execArgv<NonProjectOption />
+
+- **Type:** `string[]`
+- **Default:** `[]`
+
+Pass additional arguments to `node` in the threads. See [Command-line API | Node.js](https://nodejs.org/docs/latest/api/cli.html) for more information.
+
+:::warning
+Be careful when using, it as some options may crash worker, e.g. --prof, --title. See https://github.com/nodejs/node/issues/41103.
+:::
+
 #### poolOptions.forks<NonProjectOption />
 
 Options for `forks` pool.
@@ -766,6 +777,17 @@ Even though this option will force tests to run one after another, this option i
 This might cause all sorts of issues, if you are relying on global state (frontend frameworks usually do) or your code relies on environment to be defined separately for each test. But can be a speed boost for your tests (up to 3 times faster), that don't necessarily rely on global state or can easily bypass that.
 :::
 
+##### poolOptions.forks.execArgv<NonProjectOption />
+
+- **Type:** `string[]`
+- **Default:** `[]`
+
+Pass additional arguments to `node` process in the child processes. See [Command-line API | Node.js](https://nodejs.org/docs/latest/api/cli.html) for more information.
+
+:::warning
+Be careful when using, it as some options may crash worker, e.g. --prof, --title. See https://github.com/nodejs/node/issues/41103.
+:::
+
 #### poolOptions.vmThreads<NonProjectOption />
 
 Options for `vmThreads` pool.
@@ -836,6 +858,17 @@ Use Atomics to synchronize threads.
 
 This can improve performance in some cases, but might cause segfault in older Node versions.
 
+##### poolOptions.vmThreads.execArgv<NonProjectOption />
+
+- **Type:** `string[]`
+- **Default:** `[]`
+
+Pass additional arguments to `node` process in the VM context. See [Command-line API | Node.js](https://nodejs.org/docs/latest/api/cli.html) for more information.
+
+:::warning
+Be careful when using, it as some options may crash worker, e.g. --prof, --title. See https://github.com/nodejs/node/issues/41103.
+:::
+
 ### testTimeout
 
 - **Type:** `number`

packages/vitest/src/node/pool.ts

@@ -63,7 +63,7 @@ export function createPool(ctx: Vitest): ProcessPool {
     // Instead of passing whole process.execArgv to the workers, pick allowed options.
     // Some options may crash worker, e.g. --prof, --title. nodejs/node#41103
     const execArgv = process.execArgv.filter(execArg =>
-      execArg.startsWith('--cpu-prof') || execArg.startsWith('--heap-prof'),
+      execArg.startsWith('--cpu-prof') || execArg.startsWith('--heap-prof') || execArg.startsWith('--diagnostic-dir'),
     )
 
     const options: PoolProcessOptions = {

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

@@ -69,7 +69,10 @@ export function createChildProcessPool(ctx: Vitest, { execArgv, env, forksPath }
     minThreads,
 
     env,
-    execArgv,
+    execArgv: [
+      ...ctx.config.poolOptions?.forks?.execArgv ?? [],
+      ...execArgv,
+    ],
 
     terminateTimeout: ctx.config.teardownTimeout,
   }

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

@@ -56,7 +56,10 @@ export function createThreadsPool(ctx: Vitest, { execArgv, env, workerPath }: Po
     minThreads,
 
     env,
-    execArgv,
+    execArgv: [
+      ...ctx.config.poolOptions?.threads?.execArgv ?? [],
+      ...execArgv,
+    ],
 
     terminateTimeout: ctx.config.teardownTimeout,
   }

packages/vitest/src/node/pools/vm-threads.ts

@@ -66,6 +66,7 @@ export function createVmThreadsPool(ctx: Vitest, { execArgv, env, vmPath }: Pool
       '--experimental-vm-modules',
       '--require',
       suppressWarningsPath,
+      ...ctx.config.poolOptions?.vmThreads?.execArgv ?? [],
       ...execArgv,
     ],
 

packages/vitest/src/types/pool-options.ts

@@ -81,6 +81,19 @@ interface WorkerContextOptions {
    * @default true
    */
   isolate?: boolean
+
+  /**
+  * Pass additional arguments to `node` process when spawning `worker_threads` or `child_process`.
+  *
+  * See [Command-line API | Node.js](https://nodejs.org/docs/latest/api/cli.html) for more information.
+  *
+  * Set to `process.execArgv` to pass all arguments of the current process.
+  *
+  * Be careful when using, it as some options may crash worker, e.g. --prof, --title. See https://github.com/nodejs/node/issues/41103
+  *
+  * @default [] // no execution arguments are passed
+  */
+  execArgv?: string[]
 }
 
 interface VmOptions {
@@ -92,4 +105,17 @@ interface VmOptions {
 
   /** Isolation is always enabled */
   isolate?: true
+
+  /**
+  * Pass additional arguments to `node` process when spawning `worker_threads` or `child_process`.
+  *
+  * See [Command-line API | Node.js](https://nodejs.org/docs/latest/api/cli.html) for more information.
+  *
+  * Set to `process.execArgv` to pass all arguments of the current process.
+  *
+  * Be careful when using, it as some options may crash worker, e.g. --prof, --title. See https://github.com/nodejs/node/issues/41103
+  *
+  * @default [] // no execution arguments are passed
+  */
+  execArgv?: string[]
 }

test/run/allowed-exec-args-fixtures/allowed-exec-argv.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from 'vitest'
+
+describe('exec-args', async () => {
+  it('should have the correct flags', () => {
+    // flags that should go through
+    expect(process.execArgv).toContain('--cpu-prof')
+    expect(process.execArgv).toContain('--cpu-prof-name=cpu.prof')
+    expect(process.execArgv).toContain('--heap-prof')
+    expect(process.execArgv).toContain('--heap-prof-name=heap.prof')
+    expect(process.execArgv).toContain('--diagnostic-dir=/tmp/vitest-diagnostics')
+
+    // added via vitest
+    expect(process.execArgv).toContain('--conditions')
+    expect(process.execArgv).toContain('node')
+  })
+})

test/run/allowed-exec-args-fixtures/vitest.config.ts

@@ -0,0 +1,3 @@
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({})

test/run/exec-args-fixtures/forks.test.ts

@@ -0,0 +1,13 @@
+import { describe, expect, it } from 'vitest'
+
+describe('exec-args', async () => {
+  it('should have the correct flags', () => {
+    expect(process.execArgv).toContain('--hash-seed=1')
+    expect(process.execArgv).toContain('--random-seed=1')
+    expect(process.execArgv).toContain('--no-opt')
+
+    // added via vitest
+    expect(process.execArgv).toContain('--conditions')
+    expect(process.execArgv).toContain('node')
+  })
+})

test/run/exec-args-fixtures/threads.test.ts

@@ -0,0 +1,11 @@
+import { describe, expect, it } from 'vitest'
+
+describe('exec-args', async () => {
+  it('should have the correct flags', () => {
+    expect(process.execArgv).toContain('--inspect-brk')
+
+    // added via vitest
+    expect(process.execArgv).toContain('--conditions')
+    expect(process.execArgv).toContain('node')
+  })
+})

test/run/exec-args-fixtures/vmThreads.test.ts

@@ -0,0 +1,15 @@
+import { describe, expect, it } from 'vitest'
+
+describe('exec-args', async () => {
+  it('should have the correct flags', () => {
+    expect(process.execArgv).toContain('--inspect-brk')
+
+    // added via vitest
+    expect(process.execArgv).toContain('--experimental-import-meta-resolve')
+    expect(process.execArgv).toContain('--experimental-vm-modules')
+    expect(process.execArgv).toContain('--require')
+    expect(process.execArgv).toContainEqual(expect.stringContaining('/packages/vitest/suppress-warnings.cjs'))
+    expect(process.execArgv).toContain('--conditions')
+    expect(process.execArgv).toContain('node')
+  })
+})

test/run/no-exec-args-fixtures/no-exec-argv.test.ts

@@ -0,0 +1,12 @@
+import { describe, expect, it } from 'vitest'
+
+describe('exec-args', async () => {
+  it('should have the correct flags', () => {
+    // flags should not be passed
+    expect(process.execArgv).not.toContain('--title')
+
+    // added via vitest
+    expect(process.execArgv).toContain('--conditions')
+    expect(process.execArgv).toContain('node')
+  })
+})

test/run/no-exec-args-fixtures/vitest.config.ts

@@ -0,0 +1,3 @@
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({})

test/run/package.json

@@ -5,6 +5,7 @@
     "test": "vitest"
   },
   "devDependencies": {
+    "execa": "^7.1.1",
     "vite": "latest",
     "vitest": "workspace:*"
   }

test/run/test/exec-args.test.ts

@@ -0,0 +1,69 @@
+import { afterAll, beforeAll, expect, test } from 'vitest'
+import { execa } from 'execa'
+import { runVitest } from '../../test-utils'
+
+// VITEST_SEGFAULT_RETRY messes with the node flags, as can be seen in packages/vitest/src/node/cli-wrapper.ts
+// so here we remove it to make sure the tests are not affected by it
+const ORIGIN_VITEST_SEGFAULT_RETRY = process.env.VITEST_SEGFAULT_RETRY
+beforeAll(() => {
+  delete process.env.VITEST_SEGFAULT_RETRY
+})
+afterAll(() => {
+  process.env.VITEST_SEGFAULT_RETRY = ORIGIN_VITEST_SEGFAULT_RETRY
+})
+
+test.each([
+  { pool: 'forks', execArgv: ['--hash-seed=1', '--random-seed=1', '--no-opt'] },
+  { pool: 'threads', execArgv: ['--inspect-brk'] },
+  { pool: 'vmThreads', execArgv: ['--inspect-brk'] },
+] as const)('should pass execArgv to { pool: $pool } ', async ({ pool, execArgv }) => {
+  const fileToTest = `exec-args-fixtures/${pool}.test.ts`
+
+  const vitest = await runVitest({
+    include: [fileToTest],
+    pool,
+    poolOptions: {
+      [pool]: {
+        execArgv,
+      },
+    },
+  })
+
+  expect(vitest.stdout).toContain(`✓ ${fileToTest}`)
+})
+
+test('should not pass execArgv to workers when not specified in the config', async () => {
+  const { stdout, stderr } = await execa('node', [
+    '--title', 'this-works-only-on-main-thread',
+    '../node_modules/vitest/vitest.mjs', '--run',
+  ], {
+    cwd: `${process.cwd()}/no-exec-args-fixtures`,
+    reject: false,
+    env: {
+      VITE_NODE_DEPS_MODULE_DIRECTORIES: '/node_modules/,/packages/',
+      NO_COLOR: '1',
+    },
+  })
+
+  expect(stderr).not.toContain('Error: Initiated Worker with invalid execArgv flags: --title')
+  expect(stderr).not.toContain('ERR_WORKER_INVALID_EXEC_ARGV')
+  expect(stdout).toContain('✓ no-exec-argv.test.ts')
+})
+
+test('should let allowed args pass to workers', async () => {
+  const { stdout, stderr } = await execa('node', [
+    '--cpu-prof', '--heap-prof', '--diagnostic-dir=/tmp/vitest-diagnostics',
+    '--cpu-prof-name=cpu.prof', '--heap-prof-name=heap.prof',
+    '../node_modules/vitest/vitest.mjs', '--run',
+  ], {
+    cwd: `${process.cwd()}/allowed-exec-args-fixtures`,
+    reject: false,
+    env: {
+      VITE_NODE_DEPS_MODULE_DIRECTORIES: '/node_modules/,/packages/',
+      NO_COLOR: '1',
+    },
+  })
+
+  expect(stderr).toBe('')
+  expect(stdout).toContain('✓ allowed-exec-argv.test.ts')
+})