[SOLVED] Executing Lua code from external file in LÖVE?

[Flamore]

So, I've made a small let's say "boilerplate" in LÖVE with variables, custom screen buffer and custom screen buffer functions. The question is, is it possible to like drag n drop a file into the executable and have the main application execute it like emulator a rom? Will it be still possible to access the functions and screen buffer? If so, how.

[Varkas]

This page shows several methods:

https://www.lua.org/pil/8.html

"dofile" will execute the file right away
"loadfile" will load it and hand you a function that you can call
"loadstring" does the trick if you have the code as text and not as file

Edit: Accessing global variables should work.

[zorg]

And on the löve side, it does have the love.filedropped callback if you rather drop a file onto the already running löve project's window.

[Flamore]

Alright, gonna try these methods. Also i have heard that dofile isn't secure, is it just like some bias or something

[zorg]

technically, none of those are... but that depends on what you think "secure" is.
by the way, if you are using löve, two of those functions have "better" löve equivalents:
love.filesystem.load instead of loadfile;
dofile is basically the above, with an extra () at the end;

(better in terms of they will work even if you zip up your project into a .love file)

[Flamore]

I just wrote a simple function

Code: Select all

function love.filedropped(file)
	local ext
	ext = file:getExtension( )
	if ext == "cart" then
		dofile(file)
	else
		print("Filetype not supported")
	end
end

But yeth dofile() does not support FileData just strings. Giving this error below.

Code: Select all

Error: main.lua:240: bad argument #1 to 'dofile' (string expected, got userdata)
stack traceback:
	[string "boot.lua"]:637: in function <[string "boot.lua"]:633>
	[C]: in function 'dofile'
	main.lua:240: in function <main.lua:236>
	[string "boot.lua"]:503: in function <[string "boot.lua"]:493>
	[C]: in function 'xpcall'

[pgimeno]

Try with dofile(file:getFilename())

[Flamore]

Try with dofile(file:getFilename())

Thank you, it works like a charm. but is it possible to stop the execution like reset the sandbox?

[pgimeno]

You can restart with love.event.quit("restart")