Support relocatable custom install roots

scripts/build-node-musl.sh

@@ -12,14 +12,16 @@
 #   1. apk 模式: 使用 Alpine apk 安装 nodejs，版本受限于 Alpine 仓库
 #   2. cross 模式: 从 Node.js 官方下载 glibc 版本，转换为 musl
 #   使用 patchelf 修改 node 二进制的 ELF interpreter 和 rpath，
-#   使其直接使用打包的 musl 链接器和共享库，无需 LD_LIBRARY_PATH。
+#   使其使用系统 musl 动态链接器和相对 rpath，可从任意安装根目录直接运行。
 #   这样 process.execPath 返回正确的 node 路径，子进程 fork 也能正常工作。
-#   安装路径固定为 /opt/openclaw/node (与 openclaw-env 一致)。
 # ============================================================================
 set -e
 
-INSTALL_PREFIX="/opt/openclaw/node"
 BUILD_MODE="${BUILD_MODE:-apk}"
+DEFAULT_VERIFY_PREFIX="/opt/openclaw/node"
+CUSTOM_VERIFY_PREFIX="/tmp/custom-openclaw-root/openclaw/node"
+SYSTEM_MUSL_LOADER="/lib/ld-musl-aarch64.so.1"
+RELATIVE_RPATH='$ORIGIN/../lib'
 
 echo "=== Node.js ARM64 musl Build ==="
 echo "  Target version: v${NODE_VER}"
@@ -198,10 +200,10 @@ finalize_package() {
 
 	# 用 patchelf 修改 node 二进制
 	echo "=== Patching ELF binary ==="
-	patchelf --set-interpreter "${INSTALL_PREFIX}/lib/ld-musl-aarch64.so.1" "${PKG_DIR}/bin/node"
-	patchelf --set-rpath "${INSTALL_PREFIX}/lib" "${PKG_DIR}/bin/node"
-	echo "  interpreter: ${INSTALL_PREFIX}/lib/ld-musl-aarch64.so.1"
-	echo "  rpath: ${INSTALL_PREFIX}/lib"
+	patchelf --set-interpreter "/lib/ld-musl-aarch64.so.1" "${PKG_DIR}/bin/node"
+	patchelf --set-rpath "$RELATIVE_RPATH" "${PKG_DIR}/bin/node"
+	echo "  interpreter: ${SYSTEM_MUSL_LOADER}"
+	echo "  rpath: ${RELATIVE_RPATH}"
 
 	# 创建 node wrapper 脚本
 	cat > "${PKG_DIR}/bin/node-wrapper" << 'NODEWRAPPER'
@@ -229,20 +231,27 @@ exec "${SELF_DIR}/node" "${SELF_DIR}/../lib/node_modules/npm/bin/npx-cli.js" "$@
 NPXWRAPPER
 	chmod +x "${PKG_DIR}/bin/npm" "${PKG_DIR}/bin/npx"
 
-	# 验证
-	echo "=== Verification ==="
-	mkdir -p "${INSTALL_PREFIX}"
-	cp -a "${PKG_DIR}"/* "${INSTALL_PREFIX}/"
-	
-	# 设置库路径并测试
-	export LD_LIBRARY_PATH="${INSTALL_PREFIX}/lib"
-	
-	"${INSTALL_PREFIX}/bin/node" --version
-	"${INSTALL_PREFIX}/bin/node" -e "console.log('execPath:', process.execPath)"
-	"${INSTALL_PREFIX}/bin/node" -e "console.log(process.arch, process.platform, process.versions.modules)"
-	NODE_ICU_DATA="${INSTALL_PREFIX}/share/icu" "${INSTALL_PREFIX}/bin/npm" --version 2>/dev/null || echo "npm needs ICU data"
-	
-	rm -rf "${INSTALL_PREFIX}"
+	verify_prefix() {
+		local prefix="$1"
+		local label="$2"
+		local exec_path=""
+
+		echo "=== Verification (${label}) ==="
+		rm -rf "$prefix" 2>/dev/null || true
+		mkdir -p "$prefix"
+		cp -a "${PKG_DIR}"/* "${prefix}/"
+
+		"${prefix}/bin/node" --version
+		exec_path=$("${prefix}/bin/node" -e "process.stdout.write(process.execPath)")
+		[ "$exec_path" = "${prefix}/bin/node" ]
+		"${prefix}/bin/node" -e "console.log(process.arch, process.platform, process.versions.modules)"
+		NODE_ICU_DATA="${prefix}/share/icu" "${prefix}/bin/npm" --version >/dev/null
+
+		rm -rf "$prefix" 2>/dev/null || true
+	}
+
+	verify_prefix "$DEFAULT_VERIFY_PREFIX" "default install root"
+	verify_prefix "$CUSTOM_VERIFY_PREFIX" "custom install root"
 
 	# 打包
 	echo "=== Creating tarball ==="