Installer [ReboOSt]

local tArgs = {...}
local stream = tArgs[1]

local function GitHubGet(branch)
    local branch = branch or nil
    local URL = "https://api.github.com/repos/Chickenbreadlp/ReboOSt/contents/" .. (branch and "?ref=" or "") .. (branch or "")
    local removeLuaExtention = true

    function getFileDownloadURLs(url, gatheredFiles, gatheredDirectories)
        assert(url, "url invalid")
        local handle = assert(http.get(url), "Getting " .. url .. " failed")
        local json = assert(handle.readAll(), "Reading failed for url " .. url)
        json = json:gsub("%s*\n%s*", "") --removes white space around '\n' and '\n'
        json = json:gsub("\"([^\"]*)\"%s*:%s*", "%1 = ") --turns '"hi": ' into 'hi = '
        json = json:sub(2, #json - 1) --removes brackets around the almostJSON
        json = "{" .. json .. "}" --adds curly brackets
        local jsonTable = assert(textutils.unserialize(json), "Failed to unserialize:\n" .. json)
        local files = gatheredFiles or {}
        local directories = gatheredDirectories or {}
        for k, v in ipairs(jsonTable) do
            if v.type == "file" then
                files[#files + 1] = {url = v.download_url, path = v.path}
            elseif v.type == "dir" then
                directories[#directories + 1] = v.url
            end
        end
        local recursiveURL = directories[1]
        if not recursiveURL then
            return files
        end
        if recursiveURL then
            table.remove(directories, 1)
            return getFileDownloadURLs(recursiveURL, files, directories)
        end
    end

    for k, v in ipairs(getFileDownloadURLs(URL)) do
        if (v.path:sub(#v.path - 3) == ".lua") and removeLuaExtention then
            v.path = v.path:sub(1, #v.path - 4)
        end
        local writeFile = fs.open("/" .. v.path, "w")
        local webHandle = assert(http.get(v.url), "Getting " .. v.url .. " failed")
        local webContents = assert(webHandle.readAll(), "Reading " .. v.url .. " failed")
        writeFile.write(webContents)
        writeFile.close()
    end
end

local function Set (list)
  local set = {}
  for _, l in ipairs(list) do set[l] = true end
  return set
end

local builds = Set { "0011", "0012", "0030", "0031", "0032", "1033", "1010", "1011", "2034", "2035", "3036" }

if term.isColor() then
 if stream == nil then
  GitHubGet("installer")
  fs.delete("README.md")
  if fs.exists("/ReboOSt") then
   fs.delete("/Setup")
   shell.run("/Uninst/contrll")
  else
   fs.delete("/Uninst")
   shell.run("/Setup/contrll")
  end
 elseif stream == "Dev" then
  print("Formatting Harddrive...")
  shell.run("rm", "*")
  print("Downloading OS...")
  GitHubGet("development")
  print("Cleaning up...")
  fs.delete("/README.md")
  fs.delete("version")
  fs.delete("updat")
  print("Rebooting...")
  os.reboot()
 elseif builds[stream] then
  print(" Formatting Harddrive...")
  shell.run("rm", "*")
  print("Downloading OS...")
  GitHubGet("build-"..stream)
  print("Cleaning up...")
  fs.delete("/README.md")
  fs.delete("/version")
  fs.delete("/updat")
  print("Rebooting...")
  os.reboot()
 end
else
 print("ReboOSt is only available for Computers with a colored Interface!")
end