Dalbit

Dalbit(달빛) is a Luau-to-Lua transpiler, designed specifically for Lua 5.3.

Installation

Using pesde

To manage/install with pesde manifest:

pesde add caveful_games/dalbit --dev --target lune
pesde install

To run directly from anywhere:

pesde x caveful_games/dalbit

From Releases

Using Cargo (build from source)

cargo install dalbit --locked

Usage

You can print more options and informations by running dalbit help [command]

init

Initializes dalbit manifest file in the current path.

dalbit init [path]

fetch

Fetches and updates lua polyfills.

• This polyfill can be found here.

dalbit fetch --config <config-path>

transpile

Transpiles luau code to lua code.

dalbit transpile --config <config-path>

clean

Cleans polyfill caches from disk.

dalbit clean

Example

dalbit.toml

input = "input.luau"
output = "output.lua"
file_extension = "lua"
target_version = "lua53"
minify = true

[modifiers]

[polyfill]
repository = "https://github.com/CavefulGames/dalbit-polyfill"
injection_path = "__polyfill__"

inputs/input.luau

local obj = { items = {1, 4, 9} }
setmetatable(obj, { __iter = function(o) return next, o.items end })

for k, v in obj do
    print(k * k)
end

outputs/output.luau

local setmetatable=require'./__polyfill__'.setmetatable local __DALBIT_getmetatable_iter=require'./__polyfill__'.__DALBIT_getmetatable_iter local type=require'./__polyfill__'.type local next=require'./__polyfill__'.next local io=nil local module=nil local package=nil local dofile=nil local loadfile=nil local load=nil local obj={items={1,4,9}}
setmetatable(obj,{__iter=function(o)return next,o.items end})do local _DALBIT_REMOVE_GENERALIZED_ITERATION_itere234e8bef135bb4c, _DALBIT_REMOVE_GENERALIZED_ITERATION_invare234e8bef135bb4c, _DALBIT_REMOVE_GENERALIZED_ITERATION_controle234e8bef135bb4c=

obj if type(_DALBIT_REMOVE_GENERALIZED_ITERATION_itere234e8bef135bb4c)=='table'then local m=__DALBIT_getmetatable_iter(_DALBIT_REMOVE_GENERALIZED_ITERATION_itere234e8bef135bb4c)if type(m)=='table'and type(m.__iter)=='function'then _DALBIT_REMOVE_GENERALIZED_ITERATION_itere234e8bef135bb4c, _DALBIT_REMOVE_GENERALIZED_ITERATION_invare234e8bef135bb4c, _DALBIT_REMOVE_GENERALIZED_ITERATION_controle234e8bef135bb4c=m.__iter(_DALBIT_REMOVE_GENERALIZED_ITERATION_itere234e8bef135bb4c)else _DALBIT_REMOVE_GENERALIZED_ITERATION_itere234e8bef135bb4c, _DALBIT_REMOVE_GENERALIZED_ITERATION_invare234e8bef135bb4c, _DALBIT_REMOVE_GENERALIZED_ITERATION_controle234e8bef135bb4c=next, _DALBIT_REMOVE_GENERALIZED_ITERATION_itere234e8bef135bb4c end end for k,v in _DALBIT_REMOVE_GENERALIZED_ITERATION_itere234e8bef135bb4c,_DALBIT_REMOVE_GENERALIZED_ITERATION_invare234e8bef135bb4c,_DALBIT_REMOVE_GENERALIZED_ITERATION_controle234e8bef135bb4c do
print(k*k)
end end

How does it work?

• Dalbit utilizes darklua and full-moon to transform lua scripts and injects polyfills.

Real-world use cases

• Kaledis - A tool that enables Luau to work with Love2D, simplifying project management, transpiling, and configuration.
• overblox - A tool that can transpile Roblox scripts to OVERDARE scripts using Dalbit.

Contributions

Any issues, advices, and PRs for contribution are welcome!

Special Thanks

• seaofvoices/darklua - Providing important and cool lua mutating rules.
• Kampfkarren/full-moon - A lossless Lua parser.

Trivia

The name of this project, Dalbit, translates to "moonshine" in Korean.