Schematic builder for CC 1.7+

scriptName = "Schematic builder"
version = "1.7"
--[[
Builds structures using schematic files with a turtle or a command computer. Schematics can be downloaded from sites such as http://www.planetminecraft.com.

Requires openperipherals in CC 1.7 - 1.79. Plethora in later versions. Other combinations might work,

If interrupted, you can resume by placing the turtle back in the original location and restarting the program.

Quick setup
Copy a schematic file to the turtle/command computer (see downloading instructions if on a server)

Turtles must be placed on top of a chest (any type).
Command computers require a chest on any side.

pastebin run Fm3xf6Z9 builder.lua <filename>
--or if using Opus OS, just type
builder.lua <filename>

The first time you run the program, you must select a wrench. Place a wrench into the chest. Go to the supplies list and double-click the SelectAWrench item. Select the wrench and apply. EnderIO, Thermal Expansion, and Applied Energistics wrenches will work (only wrenches that can spin pistons will work).

Downloading schematics
Option 1: Use wget if the schematic is available for download.

Option 2: Transferring via pastebin
To create a base64 file from a command line, do:

linux / max:
base64 -w0 NAME.schematic > NAME.schematic.base64

windows (I haven't tried this - but google said this will work):
certutil -encode NAME.schematic NAME.schematic.base64

Upload the base64 file to pastebin.

To download and convert the base64 file back into a schematic file, do:
pastebin run Fm3xf6Z9 base64dl.lua <filename> <url>

You can download a simple test schematic using:
pastebin run Fm3xf6Z9 base64dl.lua chicken.schematic https://pastebin.com/raw/vxpHBUky



]]


local GIT_REPO = 'kepler155c/opus/master'
local BASE = 'https://raw.githubusercontent.com/' .. GIT_REPO

local function dourl(url, ...)
  local env = setmetatable({ }, { __index = _G })
  for k,v in pairs(getfenv(1)) do
    env[k] = v
  end

  local h = http.get(url)
  if h then
    local fn, m = load(h.readAll(), url, nil, env)
    h.close()
    if fn then
      return fn(...)
    end
  end
  error('Failed to download ' .. url)
end

dourl(BASE .. '/sys/boot/multishell.boot', ...)