From b59618b1f6b7702880e0479b62858d73fa7a1b78 Mon Sep 17 00:00:00 2001
From: Andy Wilson <31218527+The-Code-Monkey@users.noreply.github.com>
Date: Tue, 19 Apr 2022 09:51:31 +0100
Subject: [PATCH] Add ability to use package json version.

This will only work with top level package json file and not nested files.
---
 src/main.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/main.ts b/src/main.ts
index 3c5661b55..f4ad14418 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -72,6 +72,18 @@ function resolveVersionInput(): string {
       'Both node-version and node-version-file inputs are specified, only node-version will be used'
     );
   }
+  
+  if (version === "package") {
+    const packageJson = JSON.parse(
+      fs.readFileSync(
+        path.join(
+          process.env.GITHUB_WORKSPACE!, 
+          "package.json"
+        )
+      )
+    );
+    return packageJson.engines.node;
+  }
 
   if (version) {
     return version;