Turtle Architect V2.1 installer

if not term.isColor() then
    error("Turtle Architect is incompatible with regular "..(turtle and "turtles" or "computers").."!",0)
  end
  local tArgs = {...}
  local minification = tArgs[2] ~= "-t" --trims all indentation from the files to reduce the file size by roughly 25%
  local folder = tArgs[1] or ""
  local tContents = {}
  local getContents
  local tSha = {}
  local tIgnore = { --files to ignore
    ["README.md"] = true
  }

  local prevLines
  local termX,termY = term.getSize()
  local midY = math.floor(termY/2)
  local print = function(text)
    local tLines = {}
    while #text > 0 do  --splits text into a table containing each line
      local line = text:sub(1,termX)
      local newLine = string.find(line.."","\n") --check for new line character
      if newLine then
        line = line:sub(1,newLine-1)
        text = text:sub(#line+2,#text)
      elseif #line == termX then
        local endSpace = line:find"%s$" or line:find"%s%S-$" or termX
        line = line:sub(1,endSpace)
        text = text:sub(#line+1)
      else
        text = ""
      end
      line = string.rep(" ",math.max(math.floor((termX-#line)/2),0))..line
      line = line..string.rep(" ",math.max(termX-#line,0))
      tLines[#tLines+1] = line
    end
    if prevLines and #prevLines > #tLines then
      for i = 1,#prevLines do
        if not tLines[i] then
          term.setCursorPos(1,midY-math.floor(#prevLines/2)+i)
          term.clearLine()
        end
      end
    end
    for i,line in ipairs(tLines) do
      term.setCursorPos(1,midY-math.floor((#tLines/2))+i)
      term.write(line)
    end
    prevLines = tLines
  end

  getContents = function(path)
    path = path or ""
    print("Scanning Github repo\n"..path.."\nfor files...")
    local web = http.get("https://api.github.com/repos/Pyeroh/TurtleArchitectV2/contents"..path)
    assert(web,(path ~= "" and "Error: Failed to get contents of "..path) or "Error: Github download limit exceeded")
    local sContents = web.readAll()
    web.close()
    local _s,remainder = sContents:find'"name":"'
    local name = sContents:match'"name":"(.-)"'
    while name do
      if tIgnore[name] then
        sContents = sContents:sub(remainder)..""
      else
        sContents = sContents:sub(remainder)..""
        local url = sContents:match'html_url":"(.-)"'
        assert(url,"Error: Failed to get the url of "..path.."/"..name)
        url = url:gsub("https://","https://raw.")
        url = url:gsub("blob/","")
        local fileName = folder..path.."/"..name
        if sContents:match'"type":"(.-)"' == "file" then
          tContents[fileName] = url
          tSha[fileName] = sContents:match'"sha":"(.-)"'
        else
          if not fs.exists(fileName) then
            fs.makeDir(fileName)
          end
          getContents(path.."/"..name)
        end
      end
      _s,remainder = sContents:find'"name":"'
      name = sContents:match'"name":"(.-)"'
    end
  end
  local createPath
  term.setTextColor(colors.white)
  term.setBackgroundColor(colors.black)
  term.clear()
  getContents()
  for file,url in pairs(tContents) do
    if not file:match"README.md" then
      local saveFile = fs.open(file:match"arc.Lua" and file:sub(1,#file-4) or file,"w")
      print("Downloading\n"..url)
      local webFile
      while not webFile do
        webFile = http.get(url)
        if not webFile then
          print("Download failed. Retry? (Y/N)")
          while true do
            local _e,key = os.pullEvent"key"
            if key == keys.y then --Y
              print"Retrying..."
              break
            elseif key == keys.n then --N
              print"Installation canceled"
              saveFile.close()
              return
            end
          end
        end
      end
      if file:match"TAFiles/Settings.Lua" then --settings file can't be minified
        saveFile.write(webFile.readAll())
      else
        local line = webFile.readLine()
        while line do
          saveFile.write((minification and (line:match"(%S.*)$" or "") or line).."\n")
          line = webFile.readLine()
        end
      end
      saveFile.close()
      webFile.close()
    end
  end
  local file = fs.open(folder.."/".."TAFiles/gitSha","w")
  file.write(textutils.serialize(tSha))
  file.close()
  print("Sucessfully installed Turtle Architect V2.1\nType "..(folder ~= "" and folder ~= "/" and folder.."/" or "").."arc to run it.")