Makes lua optional

src/engine/lua.cc

@@ -41,6 +41,7 @@ namespace engine {
 
 
 bool Lua::isCompatible(std::string script, Lua *l, std::string *error) {
+#ifdef WITH_LUA
     std::string lua(".lua");
     std::string err;
 
@@ -57,10 +58,15 @@ bool Lua::isCompatible(std::string script, Lua *l, std::string *error) {
     }
 
     return true;
+#else
+    error->assign("Lua support was not enabled.");
+    return false;
+#endif
 }
 
 
 bool Lua::load(std::string script, std::string *err) {
+#ifdef WITH_LUA
     lua_State *L = NULL;
     L = luaL_newstate();
     luaL_openlibs(L);
@@ -93,9 +99,13 @@ bool Lua::load(std::string script, std::string *err) {
 
     lua_close(L);
     return true;
+#else
+    err->assign("Lua support was not enabled.");
+    return false;
+#endif
 }
 
-
+#ifdef WITH_LUA
 int Lua::blob_keeper(lua_State *L, const void *p, size_t sz, void *ud) {
     LuaScriptBlob *lsb = static_cast<LuaScriptBlob *>(ud);
     lsb->write(p, sz);
@@ -108,9 +118,10 @@ const char *Lua::blob_reader(lua_State *L, void *ud, size_t *size) {
     const char *data = lsb->read(size);
     return data;
 }
-
+#endif
 
 int Lua::run(Transaction *t) {
+#ifdef WITH_LUA
     std::string luaRet;
     lua_State *L = luaL_newstate();
     luaL_openlibs(L);
@@ -188,9 +199,14 @@ int Lua::run(Transaction *t) {
     }
 
     return true;
+#else
+    t->debug(9, "Lua support was not enabled.");
+    return false;
+#endif
 }
 
 
+#ifdef WITH_LUA
 int Lua::log(lua_State *L) {
     Transaction *t = NULL;
     const char *text;
@@ -371,7 +387,7 @@ std::string Lua::applyTransformations(lua_State *L, Transaction *t, int idx, std
 
     return newVar;
 }
-
+#endif
 
 }  // namespace engines
 }  // namespace modsecurity

src/engine/lua.h

@@ -14,8 +14,8 @@
  */
 
 #ifdef WITH_LUA
-#endif
 #include <lua.hpp>
+#endif
 
 #include <iostream>
 #include <cstdint>
@@ -29,6 +29,7 @@ namespace modsecurity {
 class Transaction;
 namespace engine {
 
+#ifdef WITH_LUA
 class LuaScriptBlob {
  public:
     LuaScriptBlob() :
@@ -61,7 +62,7 @@ class LuaScriptBlob {
     unsigned char *m_data;
     size_t m_len;
 };
-
+#endif
 
 class Lua {
  public:
@@ -71,6 +72,7 @@ class Lua {
     int run(Transaction *t);
     static bool isCompatible(std::string script, Lua *l, std::string *error);
 
+#ifdef WITH_LUA
     static int blob_keeper(lua_State *L, const void *p, size_t sz, void *ud);
     static const char *blob_reader(lua_State *L, void *us, size_t *size);
 
@@ -82,10 +84,11 @@ class Lua {
         std::string var);
 
     LuaScriptBlob m_blob;
+#endif
     std::string m_scriptName;
 };
 
-
+#ifdef WITH_LUA
 static const struct luaL_Reg mscLuaLib[] = {
     { "log", Lua::log },
     { "getvar", Lua::getvar },
@@ -93,7 +96,7 @@ static const struct luaL_Reg mscLuaLib[] = {
     { "setvar", Lua::setvar },
     { NULL, NULL }
 };
-
+#endif
 
 }  // namespace engines
 }  // namespace modsecurity