snakemaze installer

local function extractRepository(cpfDir, destDir)
        print("Constructing project...")
        local file = io.open(cpfDir, "r")
        local cFile = nil
        local lc = 0
                local total = 0
                local ox,oy = term.getCursorPos()

        for line in file:lines() do
                if lc > 0 then
                        cFile:write(line.."\n")
                        lc = lc-1
                                                term.clearLine()
                                                term.setCursorPos(ox,oy)
                        if lc == 0 then
                                cFile:close()
                                print("File write complete.")
                        else
                                                        term.write(((total-lc)/total * 100).."%")
                                                end
                elseif string.find(line, "MKDIR") == 1 then
                        local newDirPath = destDir.."/"..string.sub(line, 7)
                        if fs.exists(newDirPath) then fs.delete(newDirPath) end
                        fs.makeDir(newDirPath)
                        print("Created dir "..newDirPath)
                elseif string.find(line, "MKFIL") == 1 then
                        local newFilPath = destDir.."/"..string.sub(line, 7)
                        if fs.exists(newFilPath) then fs.delete(newFilPath) end
                        cFile = io.open(newFilPath, "w")
                        print("Created file "..newFilPath)
                                                ox,oy = term.getCursorPos()
                elseif string.find(line, "WRITE") == 1 then
                        lc = tonumber(string.sub(line, 7))
                                                total = lc
                end
                                sleep(0)
        end
        print("Project constructed.")
end

local lpath = shell.resolve(".").."/snakemaze"

local repoCode = "xRX6zwr7"

if fs.exists(lpath) then
        print(lpath.." already exists. Rename or use another directory to install.")
        return
end

print("Snake Maze Installer")
print("Includes exe and 16 levels")
print("\nInstalling to the following directory:")
term.setTextColour(colours.yellow)
print("  "..lpath.."\n")
term.setTextColour(colours.white)
term.write("Ready to install? Y/N: ")

while true do
        local _,p1 = os.pullEvent("key")
        if p1 == keys.y then
                term.setTextColour(colours.lime)
                print("Y\n")
                break
        elseif p1 == keys.n then
                term.setTextColour(colours.red)
                print("N\n")
                                os.pullEvent()
                return
        end
end

term.setTextColour(colours.white)
print("Downloading "..repoCode.."... ")
if not shell.run("pastebin", "get", repoCode, "glrepo") then
        term.setTextColour(colours.red)
        print("failed!")
        return
end

extractRepository(shell.resolve(".").."/glrepo", shell.resolve("."))
print("Deleting archive...")
fs.delete(shell.resolve(".").."/glrepo")

print("Installation complete!")