Allow non-lua builds

scripting/CMakeLists.txt

@@ -2,21 +2,22 @@ include(UseSWIG)
 set_property(SOURCE couch.i PROPERTY CPLUSPLUS ON)
 set_property(SOURCE couch.i PROPERTY USE_TARGET_INCLUDE_DIRECTORIES ON)
 
-if (NOT WIN32)
-swig_add_library(couchlua
-  TYPE SHARED
-  LANGUAGE lua
-  SOURCES couch.i lua/helpers.i)
-else()
-  swig_add_library(couchlua
-  TYPE STATIC
-  LANGUAGE lua
-  SOURCES couch.i lua/helpers.i)
-endif()
-
+if (LUA_ENABLED)
+  if (NOT WIN32)
+    swig_add_library(couchlua
+      TYPE SHARED
+      LANGUAGE lua
+      SOURCES couch.i lua/helpers.i)
+  else()
+    swig_add_library(couchlua
+      TYPE STATIC
+      LANGUAGE lua
+      SOURCES couch.i lua/helpers.i)
+  endif()
 target_include_directories(couchlua PRIVATE "${PROJECT_SOURCE_DIR}/core")
 
 swig_link_libraries(couchlua
   PRIVATE
   couchlib
   ${LUA_LIBRARIES})
+endif ()