component help

[Exabyte the Protogen 0]

im making a program, but commands that work in the lua interpreter dont inside a custom program. how do i fix this?

 

[Molinko 43]

Your description is a bit vague. Could you post your code with any current errors?

[Exabyte the Protogen 0]

the code that wont work:

Component.computer.stop()

the error:

attempt to index global 'component' (a nil value)

[Exabyte the Protogen 0]

i also tried:

stop()

computer.stop()

[Molinko 43]

Okay. I think I understand whats going on. You're used to ComputerCrafts' global api system. In CraftOS(Computercrafts default OS), if you want to load a library you call os.loadAPI "myLibrary" and any program executed after that call can access 'myLibrary.myfunction'. OpenOS, and most Lua environments, use the 'require' function to access and load a library within a program. Here's and example.

You must use require in each individual file loading a library respectively.

This means that if file 'A' used require to load the library 'myLib', file 'B' will also have to require 'myLib' itself to access it.

-- # Load the 'component' library. Libraries are usually stored in /lib
local component = require("component")

-- # Get the computer 'component'. Like a CC peripheral handle. This is the device api and not the library.
local computer_device = component.getPrimary("computer") -- # this device api has the 'stop' method.
-- # Shorthand for getting the primary component.
local computer_device = component.computer

-- # I'd recommend using the computer library. 
-- # This api wraps the primary computer 'component' with some handy methods that are nicer to use.
local computer = require("computer")

-- # With device api
-- # Stop the primary 'computer' component. This is most likely 'this' computer.
computer_device.stop()

-- # With the computer library. Comment out the above call to computer_device.stop to test this method.
computer.shutdown(false) -- pass boolean true to reboot.

I hope this is helpful. Look HERE for documentation. Beware some of this doc is out of date :/

[Exabyte the Protogen 0]

Well, i have never laid a big finger on CC (not at all for a few years), i just assumed if it worked in the lua interpreter it would in the custom programs too.

but thanks anyway, i think this will help

[Molinko 43]

All files in the lib folder are accessible by name globally in the lua interpreter.