copy snippet from https://github.com/asdf-vm/asdf-plugin-template/pull/46\#discussion_r1117770604

Author: JohnAmican

lib/utils.bash

@@ -36,13 +36,42 @@ list_all_versions() {
 	list_github_tags
 }
 
+get_machine_os() {
+    local OS
+    OS=$(uname -s | tr '[:upper:]' '[:lower:]')
+    
+    case "${OS}" in
+        darwin*) echo "darwin" ;;
+         linux*) echo "linux" ;;
+              *) fail "OS not supported: ${OS}" ;;
+    esac
+}
+
+get_machine_arch() {
+    local ARCH
+    ARCH=$(uname -m | tr '[:upper:]' '[:lower:]')
+
+    case "${ARCH}" in
+         i?86) echo "386" ;;
+       x86_64) echo "amd64" ;;
+      aarch64) echo "arm64" ;;
+       armv8l) echo "arm64" ;;
+        arm64) echo "arm64" ;;
+            *) fail "Architecture not supported: $ARCH" ;;
+    esac
+}
+
 download_release() {
 	local version filename url
 	version="$1"
 	filename="$2"
 
+    os=$(get_machine_os)
+    arch=$(get_machine_arch)
+
 	# TODO: Adapt the release URL convention for richgo
-	url="$GH_REPO/archive/v${version}.tar.gz"
+	# url="$GH_REPO/archive/v${version}.tar.gz"
+    url="${GH_REPO}/releases/download/v${version}/${TOOL_NAME}_${version}.tar.gz"
 
 	echo "* Downloading $TOOL_NAME release $version..."
 	curl "${curl_opts[@]}" -o "$filename" -C - "$url" || fail "Could not download $url"