From 2edb1244d560d47de2d3256365e3ccfa053ccd10 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 28 Jul 2026 02:02:30 +0000
Subject: [PATCH 1/3] Initial plan


From 04e6a029504ffb4fd1bb88c7a935ee90bf79d775 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 28 Jul 2026 02:05:27 +0000
Subject: [PATCH 2/3] Set GRAALVM_HOME for GraalVM distributions

---
 .../distributors/graalvm-installer.test.ts    | 23 +++++++++++++++++++
 src/distributions/graalvm/installer.ts        |  5 ++++
 2 files changed, 28 insertions(+)

diff --git a/__tests__/distributors/graalvm-installer.test.ts b/__tests__/distributors/graalvm-installer.test.ts
index c2e303d99..0882c6ca4 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/src/distributions/graalvm/installer.ts b/src/distributions/graalvm/installer.ts
index ccbb5b441..d2255a22b 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> {

From dfd0086192c2d9a985fa98c81f7fe6376a2dc1c8 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 28 Jul 2026 02:09:02 +0000
Subject: [PATCH 3/3] Rebuild setup action bundle

---
 dist/setup/index.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dist/setup/index.js b/dist/setup/index.js
index 89e5b84e9..c547ea81f 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();