refactor: ensure .esbuild-dev/package.json

Author: hyrious

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## Unreleased
+
+- **refactor**: Test `.esbuild-dev/package.json` instead of its parent dir.
+
 ## 0.10.11
 
 - **refactor**: Disable `--cache` by default, it might be too aggressive.

package-lock.json

@@ -52,6 +52,7 @@
     "@hyrious/esbuild-plugin-external": "^0.1.4",
     "@types/node": "^20.14.13",
     "esbuild": "^0.21.5",
+    "prettier": "^3.3.3",
     "undici": "^6.19.4",
     "vitepress": "^1.3.1"
   },

package.json

@@ -44,7 +44,10 @@ const supportsPackagesExternal = /*#__PURE__*/ (() => {
 })();
 
 class BuildError extends Error implements BuildFailure {
-  constructor(public errors: Message[], public warnings: Message[]) {
+  constructor(
+    public errors: Message[],
+    public warnings: Message[],
+  ) {
     super("Build failed");
     this.name = "BuildFailure";
   }
@@ -79,7 +82,7 @@ export async function build(
   watchOptions?: { onRebuild: (error: BuildFailure | null, stop: () => void) => void },
 ) {
   let tmpdir = tempDirectory(cacheOptions?.cwd);
-  if (!existsSync(tmpdir)) {
+  if (!existsSync(join(tmpdir, "package.json"))) {
     mkdirSync(tmpdir, { recursive: true });
     writeFileSync(join(tmpdir, "package.json"), '{"type":"module"}');
   }