Get one line of a script

Help and Feedback Scripting Support
#1

Hello, I’m trying to make a plugin that needs to get the first line of a script. Any help?

#2

Why not use ModuleScripts, and return a function that passes the first line of the script? Would that work?

#3 
local firstLine = string.match(theScript.Source, "[^\n]*")
print(firstLine)

Or to skip past all the whitespace at the front:

local firstLine = string.match(theScript.Source, "%s*([^\n]*)")
#4

Also just to do due diligence:

Why do you want to do this in the first place?

#5

Okay that works, but how would I get more lines? (Sorry, I’m bad at scripting)

#6

Can I ask why you need to do this in the first place? There might be a better solution than what I would answer.

#7

It’s meant to obfuscate scripts, and I’m trying to get individual lines

#8

Ok, so are you actually asking how to loop through all the lines in the script?

Also lua doesn’t care about newlines, so you could/should just treat the whole script as a single line if you’re trying to parse it.

#9

Okay, lemme try that
(3O characters)

#10

Sorry, not sure how to do this.
Heres the script:

script.Parent.MouseButton1Down:Connect(function()
	local Selection = game:GetService("Selection")

	for _, object in pairs(Selection:Get()) do
		if object:IsA("Script") then
			local str = object.Source
			local scr = Instance.new("Script",workspace)
			scr.Name = "ObfuscatedCode"
			str = str:lower()

			if str:find("local") then
				print("found it in string")
			end
			local firstLine = string.match(object.Source, "[^\n]*")
			-- table
			local letters = {"I","l","l","L","i"} -- etc.
			local length = 25
			local shortcut = ""
			for i = 1,length do
				shortcut = shortcut.. "" ..letters[math.random(1,#letters)]
				if i == length then
				end
			end
			scr.Source = scr.Source .. [[
local ]]..shortcut..[[ = ]]..firstLine..[[

			]]
		else
			print("Not a script")
		end
	end
end)
#11

How to do what? What is this script supposed to do?

#12

I just want to add lines individually

#13

Supposed to turn

print("YELLO")

Into this:

local IlIlLillllIlLLllllLiLIlLi = print("YELLO")
#14

Only does one line currently
(3O chars)

#15

You can iterate through lines like this:

for line in string.gmatch(object.Source, "[^\n]*") do
  print("'" .. line .. "'")
end

See String Patterns for more.

You might want to look at string.gsub if you’re just trying to find+replace, though.

However, have you thought about what happens if you give your plugin a script that looks like this?

print("a") print("b") local x = "c" print(x) function dosomething() print("d") end dosomething()

That’s valid lua, with no line breaks.

I don’t think your approach of just looking at the strings will get you very far. Give it a shot if you want to, though.

A more sophisticated system might parse the code into something called an abstract syntax tree and do operations on the code’s structure, instead of its text.