Fix esbuild scanner error by adding outdir parameter and filtering virtual modules.

Author: justinvdm

.notes/justin/worklogs/2025-09-21-fix-esbuild-scanner-error.md

@@ -75,6 +75,6 @@ A recent update to `vite` (from `7.1.5` to `7.1.6`) brought in a newer version o
 
 Two fixes were applied to the scanner configuration:
 
-1. **Added `outdir` parameter**: The `esbuild` configuration now includes a path to a temporary system directory. Because the scanner is still configured with `write: false`, no files are actually written to disk. This satisfies the new requirement from `esbuild`.
+1. **Added `outdir` parameter**: The `esbuild` configuration now includes a path to the project's intermediate builds directory. Because the scanner is still configured with `write: false`, no files are actually written to disk. This satisfies the new requirement from `esbuild` while avoiding potential collisions between multiple projects.
 
 2. **Filter virtual modules**: Entry points containing `virtual:` are now filtered out before being passed to esbuild, since virtual modules don't contain actual source code that can be scanned for directives.

sdk/src/vite/runDirectivesScan.mts

@@ -4,10 +4,10 @@ import { Environment, ResolvedConfig } from "vite";
 import fsp from "node:fs/promises";
 import { hasDirective } from "./hasDirective.mjs";
 import path from "node:path";
-import os from "node:os";
 import debug from "debug";
 import { getViteEsbuild } from "./getViteEsbuild.mjs";
 import { normalizeModulePath } from "../lib/normalizeModulePath.mjs";
+import { INTERMEDIATES_OUTPUT_DIR } from "../lib/constants.mjs";
 import { externalModules } from "./constants.mjs";
 import {
   createViteAwareResolver,
@@ -326,7 +326,7 @@ export const runDirectivesScan = async ({
       entryPoints: absoluteEntries,
       bundle: true,
       write: false,
-      outdir: path.join(os.tmpdir(), "rwsdk-directive-scan"),
+      outdir: path.join(INTERMEDIATES_OUTPUT_DIR, "directive-scan"),
       platform: "node",
       format: "esm",
       logLevel: "silent",