Feature/process module

[isdampe]

This is the first step towards decoupling OS-specific process functions so they can be used from a single module across any supported OS.

I've tested on macOS and Linux, and until someone can test on Windows (or I can get access to a Windows environment) the old code paths will remain active via the conditional macros.

To avoid major problems and giant refactors, I will try and "stagger" the implementation of this over a series of updates / branches

[isdampe]

2e519ed adds support for asynchronous process execution, streaming stdout and stderr back into a std::vector<std::string>. @studioant I'll do some testing / porting on Windows later in the week - but then I'm pretty sure we'll be able to tackle the loading screen using something like

// Before main loop...
auto git_output = std::vector<std::string>();
auto p = Arcade::Process("git", std::vector<std::string> {"clone", url});
p.execute_async(buffer);

// Main loop
while (! quit_requested()) {
	process_events();

	// Draw loading screen...
	
	// Draw the most recent chunk of text receievd from git
	draw_text(git_output.back(), /* etc */);

	refresh_screen();
}

[studioant]

2e519ed adds support for asynchronous process execution, streaming stdout and stderr back into a std::vector<std::string>. @studioant I'll do some testing / porting on Windows later in the week - but then I'm pretty sure we'll be able to tackle the loading screen using something like

// Before main loop...
auto git_output = std::vector<std::string>();
auto p = Arcade::Process("git", std::vector<std::string> {"clone", url});
p.execute_async(buffer);

// Main loop
while (! quit_requested()) {
	process_events();

	// Draw loading screen...
	
	// Draw the most recent chunk of text receievd from git
	draw_text(git_output.back(), /* etc */);

	refresh_screen();
}

Interesing.. I don't have an env to test this on, but keen to see this in action

[isdampe]

// Before main loop...
auto p = new ArcadeProcess("git", std::vector<std::string> {"clone", url});
p->execute_async();

// Main loop
while (! quit_requested()) {
	process_events();

	// Draw loading screen...
	
	// Draw the most recent chunk of text receievd from git
	draw_text(p->output_stream.back(), /* etc */);

	refresh_screen();
}