fix-welds.rbxmk.lua

--[[ 

Usage:
	rbxmk run fix-welds.rbxmk.lua PATHS

Scans each given file or directory path for rbxm and rbxmx files. For each such
file, scans for WeldConstraint instances. For each WeldConstraint, sets the
Enabled property depending on the State property.

This allows Rojo to properly sync the enabled state of WeldConstraints.

]]

local function fixWelds(file)
	local model = fs.read(file)
	for _, instance in ipairs(model:GetDescendants()) do
		if instance.ClassName == "WeldConstraint" then
			instance.Enabled = instance.State ~= 0
		end
	end
	fs.write(file, model)
end

local function scanPath(filePath)
	local files = fs.dir(filePath)
	if files then
		for _, file in ipairs(files) do
			scanPath(path.join(filePath, file.Name))
		end
	else
		local ext = path.split(filePath, "ext")
		if ext == ".rbxm" or ext == ".rbxmx" then
			fixWelds(filePath)
		end
	end
end

for _, filePath in ipairs({...}) do
	scanPath(filePath)
end