Wrangler: fix autoconfig using absolute paths for static projects (#11455)

Author: dario-piotrowicz

.changeset/slick-beers-cover.md

@@ -0,0 +1,41 @@
+---
+"wrangler": patch
+---
+
+Fix autoconfig using absolute paths for static projects
+
+Running the experimental autoconfig logic through `wrangler setup` and `wrangler deploy --x-autoconfig` on a static project results in absolute paths being used, this is incorrect, especially when such paths are being included in the generated wrangler.jsonc, the changes here fix the autoconfig logic to instead use paths relative to the project's root instead.
+
+For example given a project located in `/Users/usr/projects/sites/my-static-site`, before:
+
+```ts
+// wrangler.jsonc at /Users/usr/projects/sites/my-static-site
+  {
+    "$schema": "node_modules/wrangler/config-schema.json",
+    "name": "static",
+    "compatibility_date": "2025-11-27",
+    "observability": {
+      "enabled": true
+    },
+    "assets": {
+      "directory": "/Users/usr/projects/sites/my-static-site/public"
+    }
+  }
+```
+
+and after:
+
+```ts
+// wrangler.jsonc at /Users/usr/projects/sites/my-static-site
+  {
+    "$schema": "node_modules/wrangler/config-schema.json",
+    "name": "static",
+    "compatibility_date": "2025-11-27",
+    "observability": {
+      "enabled": true
+    },
+    "assets": {
+      "directory": "public"
+    }
+  }
+```

packages/wrangler/src/__tests__/autoconfig/details/get-details-for-auto-config.test.ts

@@ -1,6 +1,5 @@
 import { randomUUID } from "node:crypto";
 import { writeFile } from "node:fs/promises";
-import { join } from "node:path";
 import { seed } from "@cloudflare/workers-utils/test-helpers";
 import { describe, expect, it } from "vitest";
 import * as details from "../../../autoconfig/details";
@@ -111,7 +110,7 @@ describe("autoconfig details - getDetailsForAutoConfig()", () => {
 		await writeFile("index.html", `<h1>Hello World</h1>`);
 
 		await expect(details.getDetailsForAutoConfig()).resolves.toMatchObject({
-			outputDir: process.cwd(),
+			outputDir: ".",
 		});
 	});
 
@@ -122,7 +121,7 @@ describe("autoconfig details - getDetailsForAutoConfig()", () => {
 		});
 
 		await expect(details.getDetailsForAutoConfig()).resolves.toMatchObject({
-			outputDir: join(process.cwd(), "public"),
+			outputDir: "public",
 		});
 	});
 
@@ -133,7 +132,7 @@ describe("autoconfig details - getDetailsForAutoConfig()", () => {
 		});
 
 		await expect(details.getDetailsForAutoConfig()).resolves.toMatchObject({
-			outputDir: process.cwd(),
+			outputDir: ".",
 		});
 	});
 

packages/wrangler/src/__tests__/setup.test.ts

@@ -120,7 +120,7 @@ describe("wrangler setup", () => {
 				Detected Project Settings:
 				 - Worker Name: <WORKER_NAME>
 				 - Framework: Static
-				 - Output Directory: <cwd>/public
+				 - Output Directory: public
 
 
 				📄 Create wrangler.jsonc:

packages/wrangler/src/autoconfig/details.ts

@@ -1,6 +1,6 @@
 import { statSync } from "node:fs";
 import { readdir, stat } from "node:fs/promises";
-import { basename, join, resolve } from "node:path";
+import { basename, join, relative, resolve } from "node:path";
 import { brandColor } from "@cloudflare/cli/colors";
 import {
 	FatalError,
@@ -47,14 +47,14 @@ async function hasIndexHtml(dir: string): Promise<boolean> {
  */
 async function findAssetsDir(from: string): Promise<string | undefined> {
 	if (await hasIndexHtml(from)) {
-		return from;
+		return ".";
 	}
 	const children = await readdir(from);
 	for (const child of children) {
 		const path = join(from, child);
 		const stats = await stat(path);
 		if (stats.isDirectory() && (await hasIndexHtml(path))) {
-			return path;
+			return relative(from, path);
 		}
 	}
 	return undefined;