local tA = {...}
local rf = tA[2]
local wget = wget or loadfile("/boot/exec/wget.lua")
if not wget then
 print("wget is required to run this program")
elseif rf and pcall(fs.exists,rf) then
 local pref = tA[3] or "/boot/"
 local mode = "install"
 if tA[1]:sub(1,1) == "r" then
  mode = "remove"
 end
 local files = {}
 local lrf = "/tmp/rf.txt"

 local function precipe(s)
  local t = {}
  for line in s:gmatch("[^\n\r]+") do
   t[#t+1] = {line:match("(.+)[ \t](.+)")}
   local S = t[#t][1]
   t[#t][1] = ""
   for c in S:gmatch(".") do
    if (string.byte(c) > 31 and string.byte(c) < 127) then
     t[#t][1] = t[#t][1]..c
    end
   local S = t[#t][2]
   t[#t][2] = ""
   for c in S:gmatch(".") do
    if (string.byte(c) > 31 and string.byte(c) < 127) then
     t[#t][2] = t[#t][2]..c
    end
   end
   end
  end
  return t
 end
 local function dl(p,u)
  if u:sub(1,8) == "https://" or u:sub(1,7) == "http://" then
   wget(u,pref..p)
  elseif u == "dir" then
   fs.mkdir(pref..p)
  else
   fs.cp(u,pref..p)
  end
 end

 if rf:sub(1,8) == "https://" or rf:sub(1,7) == "http://" then
  wget(rf,"/tmp/rf.txt")
 else
  lrf = rf
 end

 local f=io.open(lrf)
 if not f then return false, "no recipe" end
 files=precipe(f:read("*a"))
 f:close()
 local total = #files

 print(mode.." the following files to "..pref.."?")
 for k,v in ipairs(files) do io.write(v[2].." ") end
 io.write("\n[yN] ")
 local c = io.read():lower():sub(1,1)
 if c ~= "y" then return false, "aborted" end

 for k,v in ipairs(files) do
  print(tostring(k).."/"..tostring(total)..": "..pref..v[2])
  if mode == "install" then
   dl(v[2],v[1])
  elseif mode == "remove" then
   fs.rm(pref..v[2])
  end
 end
end