infrastructure for hiding the terminal console on startup

docs/changelog.txt

@@ -40,6 +40,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 ## Misc Improvements
 - `buildingplan`: minimized planner panel stays minimized until you change it again
 - ``toggle-kbd-cursor``: add hotkey for toggling the keyboard cursor (Alt-K)
+- `gui/control-panel`: add option for hiding the terminal console by default
 
 ## Documentation
 

library/Core.cpp

@@ -1314,6 +1314,15 @@ static void run_dfhack_init(color_ostream &out, Core *core)
     // load user overrides
     std::vector<std::string> prefixes(1, "dfhack");
     loadScriptFiles(core, out, prefixes, CONFIG_PATH + "init");
+
+    // if the option is set, hide the terminal
+    auto L = Lua::Core::State;
+    Lua::StackUnwinder top(L);
+    Lua::CallLuaModuleFunction(out, L, "dfhack", "getHideConsoleOnStartup", 0, 1,
+        Lua::DEFAULT_LUA_LAMBDA, [&](lua_State* L) {
+            if (lua_toboolean(L, -1))
+                core->getConsole().hide();
+        }, false);
 }
 
 // Load dfhack.init in a dedicated thread (non-interactive console mode)

library/lua/dfhack.lua

@@ -51,6 +51,13 @@ if dfhack.is_core_context then
     SC_UNPAUSED = 8
 end
 
+-- User-changeable options
+
+dfhack.HIDE_CONSOLE_ON_STARTUP = true
+function dfhack.getHideConsoleOnStartup()
+    return dfhack.HIDE_CONSOLE_ON_STARTUP
+end
+
 -- Error handling
 
 safecall = dfhack.safecall