Warning: the 'u' in the repo's name is a 'µ', not a 'u'.

• Download ctruLua.zip from the releases (for something stable) or the CI server (for more features)
• Unzip it on your SD card, in a folder inside your homebrews folder; if you use HBL, extract it in /3ds/ctrulua/
• Put some scripts wherever you want, just remember where
• Launch CtrµLua from your homebrew launcher
• Use the shell to run your scripts

• Most recent working build: ctruLua.3dsx
• See https://reuh.eu/ctrulua/ci/ctrulua for all the builds.

local ctr = require("ctr")
local gfx = require("ctr.gfx")
local hid = require("ctr.hid")

while ctr.run() do
	hid.read()
	local keys = hid.keys()
	if keys.held.start then break end
	
	gfx.start(gfx.TOP)
		gfx.text(2, 2, "Hello, world !")
	gfx.stop()
	
	gfx.render()
end

This script will print "Hello, world !" on the top screen, and will exit if the user presses Start. This is the "graphical" version; there's also a text-only version, based on the console:

local ctr = require("ctr")
local gfx = require("ctr.gfx")
local hid = require("ctr.hid")

gfx.console()
print("Hello, world !")

while ctr.run() do
	hid.read()
	local keys = hid.keys()
	if keys.held.start then break end
	
	gfx.render()
end

gfx.disableConsole()

• An online version of the documentation can be found here
• To build the documentation, run make build-doc-html (requires LDoc).

• Setup your environment as shown here : http://3dbrew.org/wiki/Setting_up_Development_Environment
• Clone this repository and run the command make build-all to build all the dependencies.
• If you only made changes to ctrµLua, run make to rebuild ctrµLua without rebuilding all the dependencies.

May not work under Windows.

• Smealum and everyone who worked on the ctrulib: https://github.com/smealum/ctrulib
• Xerpi for the sf2dlib, sftdlib and sfillib
• All the Citra developers
• Everyone who worked on DevKitARM
• Nothings for the stb libs
• Everyone who worked on the other libs we use