fix: unexpected temporary file (#13267)

packages/vite/src/node/config.ts

@@ -1,5 +1,4 @@
 import fs from 'node:fs'
-import fsp from 'node:fs/promises'
 import path from 'node:path'
 import { pathToFileURL } from 'node:url'
 import { promisify } from 'node:util'
@@ -1091,18 +1090,17 @@ async function loadConfigFromBundledFile(
 ): Promise<UserConfigExport> {
  // for esm, before we can register loaders without requiring users to run node
  // with --experimental-loader themselves, we have to do a hack here:
- // write it to disk, load it with native Node ESM, then delete the file.
+ // convert to base64, load it with native Node ESM.
  if (isESM) {
- const fileBase = `${fileName}.timestamp-${Date.now()}-${Math.random()
- .toString(16)
- .slice(2)}`
- const fileNameTmp = `${fileBase}.mjs`
- const fileUrl = `${pathToFileURL(fileBase)}.mjs`
- await fsp.writeFile(fileNameTmp, bundledCode)
  try {
- return (await dynamicImport(fileUrl)).default
+ return (
+ await dynamicImport(
+ 'data:text/javascript;base64,' +
+ Buffer.from(bundledCode).toString('base64'),
+ )
+ ).default
  } finally {
- fs.unlink(fileNameTmp, () => {}) // Ignore errors
+ // Ignore errors
  }
  }
  // for cjs, we can register a custom loader via `_require.extensions`