Don't set packageManager default via action.yml

.changeset/dirty-poets-swim.md

@@ -0,0 +1,5 @@
+---
+"wrangler-action": patch
+---
+
+Fixed the package manager not being inferred based on lockfile when the `packageManager` input isn't set.

action.yml

@@ -42,6 +42,5 @@ inputs:
     description: "A string of environment variable names, separated by newlines. These will be bound to your Worker using the values of matching environment variables declared in `env` of this workflow."
     required: false
   packageManager:
-    description: "The package manager you'd like to use to install and run wrangler. If not specified, a value will be inferred based on the presence of a lockfile. Valid values: [npm, pnpm, yarn, bun]"
+    description: "The package manager you'd like to use to install and run wrangler. If not specified, the preferred package manager will be inferred based on the presence of a lockfile or fallback to using npm if no lockfile is found. Valid values are `npm` | `pnpm` | `yarn` | `bun`."
     required: false
-    default: npm

src/packageManagers.test.ts

@@ -27,7 +27,7 @@ describe("getPackageManager", () => {
 				}
 			`);
 
-		expect(getPackageManager('bun', { workingDirectory: "test/bun" }))
+		expect(getPackageManager("bun", { workingDirectory: "test/bun" }))
 			.toMatchInlineSnapshot(`
 				{
 				  "exec": "bunx",

src/packageManagers.ts

@@ -21,7 +21,7 @@ const PACKAGE_MANAGERS = {
 	},
 	bun: {
 		install: "bun i",
-		exec: "bunx"
+		exec: "bunx",
 	},
 } as const satisfies Readonly<Record<string, PackageManager>>;
 

test/bun/package.json

@@ -1,3 +1,3 @@
 {
-  "name": "wrangler-action-bun-test",
+	"name": "wrangler-action-bun-test"
 }