From e07d36bbdd53f023ff03ddec008064bf899a927e Mon Sep 17 00:00:00 2001
From: Copilot <198982749+Copilot@users.noreply.github.com>
Date: Mon, 27 Jul 2026 22:27:24 -0400
Subject: [PATCH] Set GRAALVM_HOME for GraalVM distributions (#1146)

* Initial plan

* Set GRAALVM_HOME for GraalVM distributions

* Rebuild setup action bundle

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
---
 .../distributors/graalvm-installer.test.ts    | 23 +++++++++++++++++++
 dist/setup/index.js                           |  4 ++++
 src/distributions/graalvm/installer.ts        |  5 ++++
 3 files changed, 32 insertions(+)

diff --git a/__tests__/distributors/graalvm-installer.test.ts b/__tests__/distributors/graalvm-installer.test.ts
index c2e303d9..0882c6ca 100644
--- a/__tests__/distributors/graalvm-installer.test.ts
+++ b/__tests__/distributors/graalvm-installer.test.ts
@@ -166,6 +166,29 @@ describe('GraalVMDistribution', () => {
     });
   });
 
+  describe('setJavaDefault', () => {
+    it('should set GRAALVM_HOME for Oracle GraalVM', () => {
+      (distribution as any).setJavaDefault('17.0.5', '/cached/java/path');
+
+      expect(core.exportVariable).toHaveBeenCalledWith(
+        'GRAALVM_HOME',
+        '/cached/java/path'
+      );
+    });
+
+    it('should set GRAALVM_HOME for GraalVM Community', () => {
+      (communityDistribution as any).setJavaDefault(
+        '17.0.5',
+        '/cached/java/path'
+      );
+
+      expect(core.exportVariable).toHaveBeenCalledWith(
+        'GRAALVM_HOME',
+        '/cached/java/path'
+      );
+    });
+  });
+
   describe('downloadTool', () => {
     const javaRelease = {
       version: '17.0.5',
diff --git a/dist/setup/index.js b/dist/setup/index.js
index 89e5b84e..c547ea81 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -131328,6 +131328,10 @@ class GraalVMDistribution extends JavaBase {
             throw error;
         }
     }
+    setJavaDefault(version, toolPath) {
+        super.setJavaDefault(version, toolPath);
+        exportVariable('GRAALVM_HOME', toolPath);
+    }
     async findPackageForDownload(range) {
         this.validateVersionRange(range);
         const arch = this.getSupportedArchitecture();
diff --git a/src/distributions/graalvm/installer.ts b/src/distributions/graalvm/installer.ts
index ccbb5b44..d2255a22 100644
--- a/src/distributions/graalvm/installer.ts
+++ b/src/distributions/graalvm/installer.ts
@@ -110,6 +110,11 @@ export class GraalVMDistribution extends JavaBase {
     }
   }
 
+  protected setJavaDefault(version: string, toolPath: string): void {
+    super.setJavaDefault(version, toolPath);
+    core.exportVariable('GRAALVM_HOME', toolPath);
+  }
+
   protected async findPackageForDownload(
     range: string
   ): Promise<JavaDownloadRelease> {