From 7e339831bec6cff1041b31513dc8d05b30d7c3dc Mon Sep 17 00:00:00 2001
From: Andrew Belt <andrewpbelt@gmail.com>
Date: Mon, 18 Feb 2019 13:44:10 -0500
Subject: [PATCH] Add headless mode, although patches cannot be loaded.

---
 include/app.hpp    |  4 ++--
 include/plugin.hpp |  2 +-
 src/app.cpp        | 51 ++++++++++++++++++++++++++------------------
 src/main.cpp       | 53 ++++++++++++++++++++++++++++++++--------------
 src/plugin.cpp     |  2 +-
 5 files changed, 71 insertions(+), 41 deletions(-)

diff --git a/include/app.hpp b/include/app.hpp
index 142f36d5..52634e6e 100644
--- a/include/app.hpp
+++ b/include/app.hpp
@@ -45,12 +45,12 @@ struct App {
 	history::State *history = NULL;
 	PatchManager *patch = NULL;
 
-	App();
+	void init(bool headless);
 	~App();
 };
 
 
-void init();
+void init(bool headless);
 void destroy();
 /** Returns the global App pointer */
 App *get();
diff --git a/include/plugin.hpp b/include/plugin.hpp
index f6b39357..9b00831e 100644
--- a/include/plugin.hpp
+++ b/include/plugin.hpp
@@ -14,7 +14,7 @@ namespace rack {
 namespace plugin {
 
 
-void init(bool devMode);
+void init();
 void destroy();
 void logIn(const std::string &email, const std::string &password);
 void logOut();
diff --git a/src/app.cpp b/src/app.cpp
index e993539a..1b595b57 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -11,42 +11,51 @@ namespace rack {
 namespace app {
 
 
-App::App() {
-	event = new event::State;
-	history = new history::State;
-	window = new Window;
+void App::init(bool headless) {
 	engine = new engine::Engine;
-	patch = new PatchManager;
-	scene = new Scene;
-	event->rootWidget = scene;
+	if (!headless) {
+		event = new event::State;
+		history = new history::State;
+		window = new Window;
+		patch = new PatchManager;
+		scene = new Scene;
+		event->rootWidget = scene;
+	}
 }
 
 App::~App() {
 	// Set pointers to NULL so other objects will segfault when attempting to access them
-	delete scene; scene = NULL;
-	delete patch; patch = NULL;
-	delete event; event = NULL;
-	delete history; history = NULL;
-	delete engine; engine = NULL;
-	delete window; window = NULL;
+	if (scene) delete scene;
+	scene = NULL;
+	if (patch) delete patch;
+	patch = NULL;
+	if (event) delete event;
+	event = NULL;
+	if (history) delete history;
+	history = NULL;
+	if (window) delete window;
+	window = NULL;
+	if (engine) delete engine;
+	engine = NULL;
 }
 
 
-static App *c = NULL;
+static App *app = NULL;
 
-void init() {
-	assert(!c);
-	c = new App;
+void init(bool headless) {
+	assert(!app);
+	app = new App;
+	app->init(headless);
 }
 
 void destroy() {
-	assert(c);
-	delete c;
-	c = NULL;
+	assert(app);
+	delete app;
+	app = NULL;
 }
 
 App *get() {
-	return c;
+	return app;
 }
 
 
diff --git a/src/main.cpp b/src/main.cpp
index eace6645..dbfc9bf9 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -16,6 +16,7 @@
 #include "system.hpp"
 
 #include <osdialog.h>
+#include <thread>
 #include <unistd.h> // for getopt
 #include <signal.h> // for signal
 
@@ -55,6 +56,7 @@ int main(int argc, char *argv[]) {
 #endif
 
 	bool devMode = false;
+	bool headless = false;
 	std::string patchPath;
 
 	// Parse command line arguments
@@ -65,6 +67,9 @@ int main(int argc, char *argv[]) {
 			case 'd': {
 				devMode = true;
 			} break;
+			case 'h': {
+				headless = true;
+			} break;
 			case 's': {
 				asset::systemDir = optarg;
 			} break;
@@ -101,43 +106,59 @@ int main(int argc, char *argv[]) {
 	INFO("System directory: %s", asset::systemDir.c_str());
 	INFO("User directory: %s", asset::userDir.c_str());
 
+	INFO("Initializing environment");
 	random::init();
 	midi::init();
 	rtmidiInit();
 	bridgeInit();
 	keyboard::init();
 	gamepad::init();
-	ui::init();
-	plugin::init(devMode);
-	windowInit();
-	INFO("Initialized environment");
+	plugin::init();
+	if (!headless) {
+		ui::init();
+		windowInit();
+	}
 
 	// Initialize app
+	INFO("Initializing app");
 	settings.load(asset::user("settings.json"));
-	app::init();
-	APP->scene->devMode = devMode;
-	APP->patch->init(patchPath);
-
-	INFO("Initialized app");
+	app::init(headless);
+	if (!headless) {
+		APP->scene->devMode = devMode;
+		APP->patch->init(patchPath);
+	}
 
+	INFO("Starting engine");
 	APP->engine->start();
-	APP->window->run();
-	INFO("Window closed");
+
+	if (!headless) {
+		INFO("Running window");
+		APP->window->run();
+		INFO("Stopped window");
+	}
+	else {
+		// TEMP Prove that the app doesn't crash
+		std::this_thread::sleep_for(std::chrono::seconds(2));
+	}
+	INFO("Stopping engine");
 	APP->engine->stop();
 
 	// Destroy app
-	APP->patch->save(asset::user("autosave.vcv"));
+	// APP->patch->save(asset::user("autosave.vcv"));
+	INFO("Destroying app");
 	app::destroy();
 	settings.save(asset::user("settings.json"));
-	INFO("Cleaned up app");
 
 	// Destroy environment
-	windowDestroy();
+	INFO("Destroying environment");
+	if (!headless) {
+		windowDestroy();
+		ui::destroy();
+	}
 	plugin::destroy();
-	ui::destroy();
 	bridgeDestroy();
 	midi::destroy();
-	INFO("Cleaned up environment");
+	INFO("Destroying logger");
 	logger::destroy();
 
 	return 0;
diff --git a/src/plugin.cpp b/src/plugin.cpp
index 1035bec8..56d92bf7 100644
--- a/src/plugin.cpp
+++ b/src/plugin.cpp
@@ -352,7 +352,7 @@ static void extractPackages(const std::string &path) {
 // public API
 ////////////////////
 
-void init(bool devMode) {
+void init() {
 	// Load Core
 	Plugin *corePlugin = new Plugin;
 	// This function is defined in Core/plugin.cpp