pinecone: A JavaScript->Lua converter

So, I wrote a JS->Lua converter. Instead of being based on regex or some other dumb idea, it's based on acorn, an awesome and superfast JavaScript Annotated Source Tree (AST) generator. Pinecone takes that and turns it into mostly-valid Lua.

It was written by running $ acorn try.js > try.json and looking at the JSON over and over, so don't expect very good standard conformity.

What works

• Variables var a = 1
• Multiple Variables var a = 1, b = 2
• Changing variables a = 2
• Functions function a() { return 1 }
• Functions declared as variables var a = function () { return 1 }
• If/ifelse/else
• typeof thing (turned into type(thing))
• Graceful failing
• While loops
• Do While loops (converted to repeat loops)

What doesn't

• Comments
• For loops
• Everything else

Usage

Don't.

Example

var k = 'blue', b, f = 12;

var p = 4;

if (typeof k == 'string') {
  print('String!');
}

function bacon() {
  return 'bacon';
}

var f = function () {

};

turns into

--# Converted using pinecone v0.1.0

local k, b, f = "blue", nil, 12
local p = 4
if type(k) == "string" then
  print("String!")
  
end
function bacon()
  return "bacon"
  
end
local f = function() end

Contributing

Not to be rude, but good luck. The codebase is in sore shape.
I tried to comment as much as possible, but it's not that great, and badly organized. But if you do decide to contribute, make sure you code passes a jshint lint. Outputted Lua code made from JS code that passes jshint (that pinecone fully supports) should pass luac.

License

MIT licensed. Refer to LICENSE.