chore: use ./scripts/bench-file/node_modules/vitest if necessary

scripts/bench-file/src/main.ts

@@ -2,18 +2,39 @@ import {
   type BenchmarkReport,
   reportToBenchmarkHandler,
 } from '@radashi-org/benchmarks/reporter.ts'
+import * as fs from 'node:fs'
+import * as path from 'node:path'
 import { createVitest } from 'vitest/node'
 
 main()
 
 async function main() {
   const reports: BenchmarkReport[] = []
 
+  const rootDir = new URL('../../../', import.meta.url).pathname
+  const scriptDir = new URL('../', import.meta.url).pathname
+  const nodeModulesDir = path.join(rootDir, 'node_modules')
+
+  // If the root node_modules directory doesn't contain vitest, link
+  // it to the vitest installed for this script.
+  fs.mkdirSync(nodeModulesDir, { recursive: true })
+  try {
+    fs.symlinkSync(
+      path.relative(
+        nodeModulesDir,
+        path.join(scriptDir, 'node_modules/vitest'),
+      ),
+      path.join(nodeModulesDir, 'vitest'),
+    )
+  } catch (e) {
+    console.warn(e)
+  }
+
   const vitest = await createVitest('benchmark', {
     watch: false,
     pool: 'vmThreads',
     includeTaskLocation: true,
-    config: new URL('../../../vitest.config.ts', import.meta.url).pathname,
+    config: path.join(rootDir, 'vitest.config.ts'),
     benchmark: {
       reporters: [
         reportToBenchmarkHandler(report => {