From b7ad40d98c76993db7b9ed0d8b0465d15a6e2a10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jozef=20Steinh=C3=BCbl?= <xhyrom.hyro@gmail.com>
Date: Thu, 10 Jul 2025 20:53:12 +0200
Subject: [PATCH] feat: read engines from package.json

closes https://github.com/oven-sh/setup-bun/issues/115
---
 src/utils.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/utils.ts b/src/utils.ts
index 9cbf594..3876c6a 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -28,8 +28,10 @@ export function addExtension(path: string, ext: string): string {
 }
 
 const FILE_VERSION_READERS = {
-  "package.json": (content: string) =>
-    JSON.parse(content).packageManager?.split("bun@")?.[1],
+  "package.json": (content: string) => {
+    const pkg = JSON.parse(content);
+    return pkg.packageManager?.split("bun@")?.[1] ?? pkg.engines?.bun;
+  },
   ".tool-versions": (content: string) =>
     content.match(/^bun\s*(?<version>.*?)$/m)?.groups?.version,
   ".bumrc": (content: string) => content, // https://github.com/owenizedd/bum