Add ability to execute console commands from file

src/mods/vr/CVarManager.cpp

@@ -20,6 +20,7 @@
 
 constexpr std::string_view cvars_standard_txt_name = "cvars_standard.txt";
 constexpr std::string_view cvars_data_txt_name = "cvars_data.txt";
+constexpr std::string_view user_script_txt_name = "user_script.txt";
 
 CVarManager::CVarManager() {
     ZoneScopedN(__FUNCTION__);
@@ -85,6 +86,11 @@ void CVarManager::on_pre_engine_tick(sdk::UGameEngine* engine, float delta) {
         cvar->update();
         cvar->freeze();
     }
+
+    if(m_should_execute_console_script) {
+        execute_console_script(engine, user_script_txt_name.data());
+        m_should_execute_console_script = false;
+    }
 }
 
 void CVarManager::on_draw_ui() {
@@ -168,6 +174,9 @@ void CVarManager::on_config_load(const utility::Config& cfg, bool set_defaults)
     }
 
     // TODO: Add arbitrary cvars from the other configs the user can add.
+
+    // calling UEngine::exec here causes a crash, defer to on_pre_engine_tick()
+    m_should_execute_console_script = true;
 }
 
 void CVarManager::dump_commands() {
@@ -758,4 +767,66 @@ void CVarManager::CVarData::draw_ui() try {
     }
 } catch (...) {
     ImGui::TextWrapped("Failed to read cvar data: %s", utility::narrow(m_name).c_str());
-}
+}
+
+static inline void trim(std::string &s) {
+    s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](unsigned char ch) {
+        return !std::isspace(ch);
+    }));
+
+    s.erase(std::find_if(s.rbegin(), s.rend(), [](unsigned char ch) {
+        return !std::isspace(ch);
+    }).base(), s.end());
+}
+
+void CVarManager::execute_console_script(sdk::UGameEngine* engine, const std::string& filename) {
+    ZoneScopedN(__FUNCTION__);
+
+    if(!engine) {
+        spdlog::error("[execute_console_script] engine is null");
+        return;
+    }
+
+    spdlog::info("[execute_console_script] Loading {}...", filename);
+
+    const auto cscript_txt = Framework::get_persistent_dir(filename);
+
+    if (!std::filesystem::exists(cscript_txt)) {
+        return;
+    }
+
+    std::ifstream cscript_file(utility::widen(cscript_txt.string()));
+
+    if (!cscript_file) {
+        spdlog::error("[execute_console_script] Failed to open file {}...", filename);
+        return;
+    }
+
+    for (std::string line{}; getline(cscript_file, line); ) {
+        trim(line);
+
+        // handle comments
+        if(line.starts_with('#') || line.starts_with(';')) {
+            continue;
+        }
+
+        if(line.contains('#')) {
+            line = line.substr(0, line.find_first_of('#'));
+            trim(line);
+        }
+
+        if(line.contains(';')) {
+            line = line.substr(0, line.find_first_of(';'));
+            trim(line);
+        }
+
+        if(line.length() == 0) {
+            continue;
+        }
+
+        spdlog::debug("[execute_console_script] Attempting to execute \"{}\"", line);
+        engine->exec(utility::widen(line));
+    }
+
+    spdlog::debug("[execute_console_script] done");
+}

src/mods/vr/CVarManager.hpp

@@ -23,6 +23,8 @@ class CVarManager final : public ModComponent {
     void dump_commands();
     void spawn_console();
 
+    void execute_console_script(sdk::UGameEngine* engine, const std::string& filename);
+
     bool is_hzbo_frozen_and_enabled() const {
         if (m_hzbo == nullptr) {
             return false;
@@ -194,6 +196,7 @@ class CVarManager final : public ModComponent {
 
     bool m_wants_display_console{false};
     bool m_native_console_spawned{false};
+    bool m_should_execute_console_script{false};
 
     static inline std::vector<std::shared_ptr<CVarStandard>> s_default_standard_cvars {
         // Bools