How do you make a updater for your program?

Hey guys! how do you make a updater for your program??

It depends.
1. Where is the newest version
2. Where is the version you want to update
3. Do you want to update it remotely?

its ok now because I figure it out now :)/>

share other people might want to know

Here is how I did it: I am playing on a server, so I do not have direct access to the file structure. What I did was make pastebin account so I can make and control my own pastes better. Then I wrote a simple update script that delete the old files and redownload them from pastebin everytime it was ran. I wrote it really fast and dirty, but here it is. The first value of the updateInfo is the path-to-file on the machine. The second part if the unique for the paste. The part you would enter for "pastebin get <id>". The second part is if you are updating a turtle. I keep all my computer code on floppys (easy storage), but since turtles cannot always use them, I just copy the relevant code over, if it is a turtle that it is running on.

local count = 2
local updateInfo = {}
updateInfo[1] = { "disk/file1", "URL-ID1" }
updateInfo[2] = { "disk/file2", "URL-ID2" }
local turtleCount = 2
local turtleCopy = {}
turtleCopy[1] = { "disk/fileToTurtle1", "URL-ID3" }
turtleCopy[2] = { "disk/fileToTurtle2", "URL-ID4" }
for x = 1, count do
  print("Removing " .. updateInfo[x][1] .. "...")
  shell.run("rm", updateInfo[x][1])
  print("Downloading new file from " .. updateInfo[x][2] .. " for " .. updateInfo[x][1])
  shell.run("pastebin", "get", updateInfo[x][2], updateInfo[x][1])
end
if (not (turtle == nil)) then
print()
print("Updating turtle...")
for x = 1, turtleCount do
   print("Removing " .. turtleCopy[x][2] .. " from turtle...")
   shell.run("rm", turtleCopy[x][2])
   print("Copying " .. turtleCopy[x][1] .. " to turtle...")
   shell.run("cp", turtleCopy[x][1], turtleCopy[x][2])
end
end

This above code works really well with this startup script to auto update turtles (just place the turtle beside the disk drive with the startup):

if not(turtle == nil) then
  shell.run("update")
end

Improvement:

local version = "x.x.x"
--you need a webhoster for the next thing
local ckeckForUpdate = http.get("http://www.example.com/currentVersion.php") --you have to enter your link
local checkForUpdate = checkForUpdate.readAll()
if not version == checkForUpdate then
--Here comes the download from pastebin
else
print("You have the newest version")
end