Add optional Lua scripting capabilties

configure.ac

@@ -56,6 +56,8 @@ AC_LANG_PUSH(C++)
 TORRENT_WITH_XMLRPC_C
 AC_LANG_POP(C++)
 
+TORRENT_WITH_LUA
+
 AC_DEFINE(HAVE_CONFIG_H, 1, true if config.h was included)
 AC_DEFINE(USER_AGENT, [std::string(PACKAGE "/" VERSION "/") + torrent::version()], Http user agent)
 

rtorrent.lua

@@ -0,0 +1,36 @@
+-- "rtorrent" is a global variable set by the module loading call
+-- Autocall
+local mt = {}
+function mt.__call (t, ...)
+   name = table.concat(rawget(t, "__namestack"), ".")
+   success, ret = pcall(rtorrent.call, name, ...)
+   if not success then error(name..": "..ret, 2) end
+   return ret
+end
+function mt.__index (t, key)
+   ns = rawget(t, "__namestack") or {}
+   table.insert(ns, key)
+   return setmetatable({__namestack=ns}, mt)
+end
+rtorrent["autocall"] = setmetatable({}, mt)
+
+-- autocall-config
+local mt = {}
+function mt.__call (t, ...)
+   name = table.concat(rawget(t, "__namestack"), ".")
+   success, ret = pcall(rtorrent.call, name, "", ...)
+   if not success then error(name..": "..ret, 2) end
+   return ret
+end
+function mt.__index (t, key)
+   ns = rawget(t, "__namestack")
+   if ns == nil then
+      if _G[key] ~= nil then return _G[key] end
+      ns = {}
+   end
+   table.insert(ns, key)
+   return setmetatable({__namestack=ns}, mt)
+end
+rtorrent["autocall_config"] = setmetatable({}, mt)
+
+return rtorrent

scripts/checks.m4

@@ -427,6 +427,25 @@ AC_DEFUN([TORRENT_WITH_XMLRPC_C], [
 ])
 
 
+AC_DEFUN([TORRENT_WITH_LUA], [
+  AC_ARG_WITH(lua,
+    AS_HELP_STRING([--with-lua],[enable LUA support]),
+  [
+    if test "$withval" = "no"; then
+      AC_MSG_RESULT(no)
+    else
+      AX_PROG_LUA
+      AX_LUA_LIBS
+      AX_LUA_HEADERS
+      AC_DEFINE(HAVE_LUA, 1, Use LUA.)
+      LIBS="$LIBS $LUA_LIB"
+      CXXFLAGS="$CXXFLAGS $LUA_INCLUDE"
+    fi
+  ],[
+    AC_MSG_RESULT(ignored)
+  ])
+])
+
 AC_DEFUN([TORRENT_WITH_INOTIFY], [
   AC_LANG_PUSH(C++)
 

src/Makefile.am

@@ -122,6 +122,9 @@ libsub_root_a_SOURCES = \
 	rpc/xmlrpc.h \
 	rpc/xmlrpc.cc \
 	\
+	rpc/lua.h \
+	rpc/lua.cc \
+	\
 	ui/download.cc \
 	ui/download.h \
 	ui/download_list.cc \

src/command_local.cc

@@ -60,6 +60,7 @@
 #include "utils/file_status_cache.h"
 
 #include "globals.h"
+#include "rpc/lua.h"
 #include "control.h"
 #include "command_helpers.h"
 
@@ -232,6 +233,7 @@ void
 initialize_command_local() {
   core::DownloadList*    dList = control->core()->download_list();
   core::DownloadStore*   dStore = control->core()->download_store();
+  rpc::LuaEngine*        luaEngine = control->lua_engine();
   torrent::ChunkManager* chunkManager = torrent::chunk_manager();
   torrent::FileManager*  fileManager = torrent::file_manager();
 
@@ -315,6 +317,12 @@ initialize_command_local() {
 
   CMD2_ANY_V       ("session.save",            std::bind(&core::DownloadList::session_save, dList));
 
+#ifdef HAVE_LUA
+  CMD2_ANY         ("lua.execute",            std::bind(&rpc::execute_lua, luaEngine, std::placeholders::_1, std::placeholders::_2, 0));
+  CMD2_ANY         ("lua.execute.str",        std::bind(&rpc::execute_lua, luaEngine, std::placeholders::_1, std::placeholders::_2, rpc::LuaEngine::flag_string));
+  CMD2_ANY         ("lua.import",             std::bind(&rpc::execute_lua, luaEngine, std::placeholders::_1, std::placeholders::_2, rpc::LuaEngine::flag_autocall_upvalue));
+#endif
+
 #define CMD2_EXECUTE(key, flags)                                         \
   CMD2_ANY(key, std::bind(&rpc::ExecFile::execute_object, &rpc::execFile, std::placeholders::_2, flags));
 

src/control.cc

@@ -55,6 +55,7 @@
 #include "rpc/command_scheduler.h"
 #include "rpc/parse_commands.h"
 #include "rpc/scgi.h"
+#include "rpc/lua.h"
 #include "rpc/object_storage.h"
 #include "ui/root.h"
 
@@ -68,6 +69,7 @@ Control::Control() :
 
   m_commandScheduler(new rpc::CommandScheduler()),
   m_objectStorage(new rpc::object_storage()),
+  m_luaEngine(new rpc::LuaEngine()),
   m_directory_events(new torrent::directory_events()),
 
   m_tick(0),
@@ -99,6 +101,7 @@ Control::~Control() {
   delete m_directory_events;
   delete m_commandScheduler;
   delete m_objectStorage;
+  delete m_luaEngine;
 }
 
 void

src/control.h

@@ -66,6 +66,7 @@ namespace rpc {
   class CommandScheduler;
   class XmlRpc;
   class object_storage;
+  class LuaEngine;
 }
 
 namespace torrent {
@@ -101,6 +102,7 @@ class Control {
 
   rpc::CommandScheduler* command_scheduler()        { return m_commandScheduler; }
   rpc::object_storage*   object_storage()           { return m_objectStorage; }
+  rpc::LuaEngine*        lua_engine()               { return m_luaEngine; }
 
   torrent::directory_events* directory_events()     { return m_directory_events; }
 
@@ -125,6 +127,7 @@ class Control {
 
   rpc::CommandScheduler*     m_commandScheduler;
   rpc::object_storage*       m_objectStorage;
+  rpc::LuaEngine*            m_luaEngine;
   torrent::directory_events* m_directory_events;
 
   uint64_t            m_tick;