Add command-line option to show console output on Windows.

src/main/main.cpp

@@ -579,6 +579,22 @@ int main(int argc, char** argv) {
     }
 
 #ifdef _WIN32
+    for (int i = 1; i < argc; i++)
+    {
+        if (strcmp(argv[i], "--show-console") == 0)
+        {
+            if (GetConsoleWindow() == nullptr)
+            {
+                AllocConsole();
+                freopen("CONIN$", "r", stdin);
+                freopen("CONOUT$", "w", stderr);
+                freopen("CONOUT$", "w", stdout);
+            }
+
+            break;
+        }
+    }
+
     // Set up console output to accept UTF-8 on windows
     SetConsoleOutputCP(CP_UTF8);