if NOMSU_VERSION and NOMSU_PREFIX then
  local ver_bits
  do
    local _accum_0 = { }
    local _len_0 = 1
    for ver_bit in NOMSU_VERSION:gmatch("[0-9]+") do
      _accum_0[_len_0] = ver_bit
      _len_0 = _len_0 + 1
    end
    ver_bits = _accum_0
  end
  local partial_vers
  do
    local _accum_0 = { }
    local _len_0 = 1
    for i = #ver_bits, 1, -1 do
      _accum_0[_len_0] = table.concat(ver_bits, '.', 1, i)
      _len_0 = _len_0 + 1
    end
    partial_vers = _accum_0
  end
  package.path = table.concat((function()
    local _accum_0 = { }
    local _len_0 = 1
    for _index_0 = 1, #partial_vers do
      local v = partial_vers[_index_0]
      _accum_0[_len_0] = tostring(NOMSU_PREFIX) .. "/share/nomsu/" .. tostring(v) .. "/?.lua"
      _len_0 = _len_0 + 1
    end
    return _accum_0
  end)(), ";") .. ";" .. package.path
  package.cpath = table.concat((function()
    local _accum_0 = { }
    local _len_0 = 1
    for _index_0 = 1, #partial_vers do
      local v = partial_vers[_index_0]
      _accum_0[_len_0] = tostring(NOMSU_PREFIX) .. "/lib/nomsu/" .. tostring(v) .. "/?.so"
      _len_0 = _len_0 + 1
    end
    return _accum_0
  end)(), ";") .. ";" .. package.cpath
  package.nomsupath = table.concat((function()
    local _accum_0 = { }
    local _len_0 = 1
    for _index_0 = 1, #partial_vers do
      local v = partial_vers[_index_0]
      _accum_0[_len_0] = tostring(NOMSU_PREFIX) .. "/share/nomsu/" .. tostring(v)
      _len_0 = _len_0 + 1
    end
    return _accum_0
  end)(), ";")
end
local EXIT_SUCCESS, EXIT_FAILURE = 0, 1
local usage = [=[Nomsu Compiler

Usage: (lua nomsu.lua | moon nomsu.moon) [-V version] [-i] [-O] [-v] [-c] [-f] [-s] [--help] [--version] [-p print_file] file1 file2... [-- nomsu args...]

OPTIONS
    -i Run the compiler in interactive mode (REPL)
    -O Run the compiler in optimized mode (use precompiled .lua versions of Nomsu files, when available)
    -v Verbose: print compiled lua code
    -c Compile .nom files into .lua files
    -f Auto-format the given Nomsu file and print the result.
    -s Check the program for syntax errors.
    -h/--help Print this message.
    --version Print the version number and exit.
    -V specify which Nomsu version is desired
    -p <file> Print to the specified file instead of stdout.
    <input> Input file can be "-" to use stdin.
]=]
local ok, _ = pcall(function()
  lpeg = require('lpeg')
  re = require('re')
end)
if not ok then
  print("Error: unable to find the 'lpeg' Lua module. Please install LPEG either from http://www.inf.puc-rio.br/~roberto/lpeg/re.html or, if you use luarocks: `luarocks install lpeg`")
  os.exit(EXIT_FAILURE)
end
local Errhand = require("error_handling")
local NomsuCompiler = require("nomsu_compiler")
local NomsuCode, LuaCode, Source
do
  local _obj_0 = require("code_obj")
  NomsuCode, LuaCode, Source = _obj_0.NomsuCode, _obj_0.LuaCode, _obj_0.Source
end
local repr
repr = require("utils").repr
if not arg or debug.getinfo(2).func == require then
  return NomsuCompiler
end
local parser = re.compile([[    args <- {| (flag ";")* {:inputs: {| ({file} ";")* |} :} {:nomsu_args: {| ("--;" ({[^;]*} ";")*)? |} :} ";"? |} !.
    flag <-
        {:interactive: ("-i" -> true) :}
      / {:optimized: ("-O" -> true) :}
      / {:format: ("-f" -> true) :}
      / {:syntax: ("-s" -> true) :}
      / {:print_file: "-p" ";" {file} :}
      / {:compile: ("-c" -> true) :}
      / {:verbose: ("-v" -> true) :}
      / {:help: (("-h" / "--help") -> true) :}
      / {:version: ("--version" -> true) :}
      / {:requested_version: "-V" ((";")? {([0-9.])+})? :}
    file <- "-" / [^;]+
]], {
  ["true"] = function()
    return true
  end
})
local arg_string = table.concat(arg, ";") .. ";"
local args = parser:match(arg_string)
if not args or args.help then
  print(usage)
  os.exit(EXIT_FAILURE)
end
local files = require("files")
local nomsu = NomsuCompiler
nomsu.arg = args.nomsu_args
if args.version then
  nomsu:run([[use "core"
say (Nomsu version)]])
  os.exit(EXIT_SUCCESS)
end
FILE_CACHE = setmetatable({ }, {
  __index = function(self, filename)
    local file = io.open(filename)
    if not (file) then
      return nil
    end
    local contents = file:read("*a")
    file:close()
    self[filename] = contents
    return contents
  end
})
local run
run = function()
  for i, input in ipairs(args.inputs) do
    if input == "-" then
      args.inputs[i] = 'stdin'
    end
  end
  if #args.inputs == 0 and not args.interactive then
    args.inputs = {
      "core"
    }
    args.interactive = true
  end
  local print_file
  if args.print_file == "-" then
    print_file = io.stdout
  elseif args.print_file then
    print_file = io.open(args.print_file, 'w')
  else
    print_file = io.stdout
  end
  if print_file == nil then
    nomsu.print = function() end
  elseif print_file ~= io.stdout then
    nomsu.print = function(...)
      local N = select("#", ...)
      if N > 0 then
        print_file:write(tostring(select(1, ...)))
        for i = 2, N do
          print_file:write('\t', tostring(select(1, ...)))
        end
      end
      print_file:write('\n')
      return print_file:flush()
    end
  end
  local input_files = { }
  local to_run = { }
  local _list_0 = args.inputs
  for _index_0 = 1, #_list_0 do
    local _continue_0 = false
    repeat
      local input = _list_0[_index_0]
      if input == 'stdin' then
        input_files[#input_files + 1] = 'stdin'
        to_run['stdin'] = true
        _continue_0 = true
        break
      end
      local found = false
      for f in files.walk(input) do
        input_files[#input_files + 1] = f
        to_run[f] = true
        found = true
      end
      if not found then
        error("Could not find: " .. tostring(input))
      end
      _continue_0 = true
    until true
    if not _continue_0 then
      break
    end
  end
  nomsu.can_optimize = function(f)
    if not (args.optimized) then
      return false
    end
    if to_run[f] then
      return false
    end
    return true
  end
  local parse_errs = { }
  local _list_1 = args.inputs
  for _index_0 = 1, #_list_1 do
    local arg = _list_1[_index_0]
    for filename in files.walk(arg) do
      local _continue_0 = false
      repeat
        local file, source
        if filename == 'stdin' then
          file = io.read("*a")
          files.spoof('stdin', file)
          source = Source('stdin', 1, #file)
        elseif filename:match("%.nom$") then
          file = files.read(filename)
          if not file then
            error("File does not exist: " .. tostring(filename), 0)
          end
          source = Source(filename, 1, #file)
        else
          _continue_0 = true
          break
        end
        source = Source(filename, 1, #file)
        local output
        if args.compile then
          output = io.open(filename:gsub("%.nom$", ".lua"), "w")
        else
          output = nil
        end
        if args.syntax then
          local err
          ok, err = pcall(nomsu.parse, nomsu, file, source)
          if not ok then
            table.insert(parse_errs, err)
          elseif print_file then
            print_file:write("Parse succeeded: " .. tostring(filename) .. "\n")
            print_file:flush()
          end
          _continue_0 = true
          break
        end
        local tree = nomsu:parse(file, source)
        if args.format then
          local formatted = tree and tostring(nomsu:tree_to_nomsu(tree)) or ""
          if print_file then
            print_file:write(formatted, "\n")
            print_file:flush()
          end
          _continue_0 = true
          break
        end
        if tree then
          if tree.type == "FileChunks" then
            for _index_1 = 1, #tree do
              local chunk = tree[_index_1]
              local lua = nomsu:compile(chunk):as_statements("return ")
              lua:declare_locals()
              lua:prepend("-- File: " .. tostring(source.filename:gsub("\n.*", "...")) .. "\n")
              if args.compile then
                output:write(tostring(lua), "\n")
              end
              if args.verbose then
                print(tostring(lua))
              end
              nomsu:run_lua(lua)
            end
          else
            local lua = nomsu:compile(tree):as_statements("return ")
            lua:declare_locals()
            lua:prepend("-- File: " .. tostring(source.filename:gsub("\n.*", "...")) .. "\n")
            if args.compile then
              output:write(tostring(lua), "\n")
            end
            if args.verbose then
              print(tostring(lua))
            end
            nomsu:run_lua(lua)
          end
        end
        if args.compile then
          print(("Compiled %-25s -> %s"):format(filename, filename:gsub("%.nom$", ".lua")))
          output:close()
        end
        _continue_0 = true
      until true
      if not _continue_0 then
        break
      end
    end
  end
  if #parse_errs > 0 then
    io.stderr:write(table.concat(parse_errs, "\n\n"))
    io.stderr:flush()
    os.exit(EXIT_FAILURE)
  elseif args.syntax then
    os.exit(EXIT_SUCCESS)
  end
  if args.interactive then
    nomsu:run([[use "core"
use "lib/consolecolor.nom"
action [quit, exit]: lua> "os.exit(0)"
action [help]
    say ".."
        This is the Nomsu v\(Nomsu version) interactive console.
        You can type in Nomsu code here and hit 'enter' twice to run it.
        To exit, type 'exit' or 'quit' and hit enter twice.

say ".."

    \(bright)\(underscore)Welcome to the Nomsu v\(Nomsu version) interactive console!\(reset color)
    
        press 'enter' twice to run a command
    \("")]])
    for repl_line = 1, math.huge do
      io.write(colored.bright(colored.yellow(">> ")))
      local buff = { }
      while true do
        io.write(colors.bright)
        local line = io.read("*L")
        io.write(colors.reset)
        if line == "\n" or not line then
          if #buff > 0 then
            io.write("\027[1A\027[2K")
          end
          break
        end
        line = line:gsub("\t", "    ")
        table.insert(buff, line)
        io.write(colored.dim(colored.yellow(".. ")))
      end
      if #buff == 0 then
        break
      end
      buff = table.concat(buff)
      local pseudo_filename = "user input #" .. repl_line
      files.spoof(pseudo_filename, buff)
      local err_hand
      err_hand = function(error_message)
        return Errhand.print_error(error_message)
      end
      local ret
      ok, ret = xpcall(nomsu.run, err_hand, nomsu, buff, Source(pseudo_filename, 1, #buff))
      if ok and ret ~= nil then
        print("= " .. repr(ret))
      elseif not ok then
        Errhand.print_error(ret)
      end
    end
  end
end
local has_ldt, ldt = pcall(require, 'ldt')
if has_ldt then
  return ldt.guard(run)
else
  return Errhand.run_safely(run)
end