Add support for aarch64 builds (#9).

src/constants.ts

@@ -7,6 +7,7 @@ export const IS_WINDOWS = process.platform === 'win32'
 export const VERSION_DEV = 'dev'
 export const VERSION_LATEST = 'latest'
 
+export const GRAALVM_ARCH = determineGraalVMArchitecture()
 export const GRAALVM_FILE_EXTENSION = IS_WINDOWS ? '.zip' : '.tar.gz'
 export const GRAALVM_GH_USER = 'graalvm'
 export const GRAALVM_PLATFORM = IS_WINDOWS ? 'windows' : process.platform
@@ -16,3 +17,17 @@ export const MANDREL_NAMESPACE = 'mandrel-'
 
 export type LatestReleaseResponse =
   otypes.Endpoints['GET /repos/{owner}/{repo}/releases/latest']['response']
+
+function determineGraalVMArchitecture(): string {
+  switch (process.arch) {
+    case 'x64': {
+      return 'amd64'
+    }
+    case 'arm64': {
+      return 'aarch64'
+    }
+    default: {
+      throw new Error(`Unsupported architecture: ${process.arch}`)
+    }
+  }
+}