nomsu/nomsu.moon

#!/usr/bin/env moon
-- This file contains the command-line Nomsu runner.
if NOMSU_VERSION and NOMSU_LIB and NOMSU_SHARE
    ver_bits = [ver_bit for ver_bit in NOMSU_VERSION\gmatch("[0-9]+")]
    partial_vers = [table.concat(ver_bits,'.',1,i) for i=#ver_bits,1,-1]
    package.path = table.concat(["#{NOMSU_SHARE}/#{v}/?.lua" for v in *partial_vers],";")..";"..package.path
    package.cpath = table.concat(["#{NOMSU_LIB}/#{v}/?.so" for v in *partial_vers],";")..";"..package.cpath
    package.nomsupath = table.concat(["#{NOMSU_SHARE}/#{v}" for v in *partial_vers],";")

EXIT_SUCCESS, EXIT_FAILURE = 0, 1
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.
]=]

ok, _ = pcall ->
    export lpeg, re
    lpeg = require 'lpeg'
    re = require 're'
if not ok
    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)
Errhand = require "error_handling"
NomsuCompiler = require "nomsu_compiler"
{:NomsuCode, :LuaCode, :Source} = require "code_obj"
{:repr} = require "utils"
STDIN, STDOUT, STDERR = "/dev/fd/0", "/dev/fd/1", "/dev/fd/2"

-- If this file was reached via require(), then just return the Nomsu compiler
if not arg or debug.getinfo(2).func == require
    return NomsuCompiler

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: -> true})
arg_string = table.concat(arg, ";")..";"
args = parser\match(arg_string)
if not args or args.help
    print usage
    os.exit(EXIT_FAILURE)

files = require "files"
nomsu = NomsuCompiler
nomsu.arg = args.nomsu_args

if args.version
    nomsu\run 'use "core"\nsay (Nomsu version)'
    os.exit(EXIT_SUCCESS)

export FILE_CACHE
-- FILE_CACHE is a map from filename (string) -> string of file contents
FILE_CACHE = setmetatable {}, {
    __index: (filename)=>
        file = io.open(filename)
        return nil unless file
        contents = file\read("*a")
        file\close!
        self[filename] = contents
        return contents
}

run = ->
    for i,input in ipairs args.inputs
        if input == "-" then args.inputs[i] = STDIN

    if #args.inputs == 0 and not args.interactive
        args.inputs = {"core"}
        args.interactive = true

    print_file = if args.print_file == "-" then io.stdout
    elseif args.print_file then io.open(args.print_file, 'w')
    else io.stdout

    if print_file == nil
        nomsu.print = ->
    elseif print_file != io.stdout
        nomsu.print = (...)->
            N = select("#",...)
            if N > 0
                print_file\write(tostring(select(1,...)))
                for i=2,N
                    print_file\write('\t',tostring(select(1,...)))
            print_file\write('\n')
            print_file\flush!

    input_files = {}
    to_run = {}
    for input in *args.inputs
        found = false
        for f in files.walk(input)
            input_files[#input_files+1] = f
            to_run[f] = true
            found = true
        if not found
            error("Could not find: #{input}")

    nomsu.can_optimize = (f)->
        return false unless args.optimized
        return false if to_run[f]
        return true

    if args.compile or args.verbose
        nomsu.on_compile = (code, from_file)->
            return unless to_run[from_file]
            if args.verbose
                io.write(tostring(code), "\n")
            if args.compile and from_file\match("%.nom$")
                output_filename = from_file\gsub("%.nom$", ".lua")
                output_file = io.open(output_filename, 'w')
                output_file\write(tostring(code))
                output_file\flush!
                print ("Compiled %-25s -> %s")\format(from_file, output_filename)
                output_file\close!

    parse_errs = {}
    for filename in *input_files
        if args.syntax
            -- Check syntax:
            file_contents = io.open(filename)\read('*a')
            ok,err = pcall nomsu.parse, nomsu, file_contents, Source(filename, 1, #file_contents)
            if not ok
                table.insert parse_errs, err
            elseif print_file
                print_file\write("Parse succeeded: #{filename}\n")
                print_file\flush!
        elseif args.format
            -- Auto-format
            file = files.read(filename)
            if not file
                error("File does not exist: #{filename}", 0)
            tree = nomsu\parse(file, Source(filename,1,#file))
            formatted = tostring(nomsu\tree_to_nomsu(tree))
            if print_file
                print_file\write(formatted, "\n")
                print_file\flush!
        elseif filename == STDIN
            file = io.input!\read("*a")
            files.spoof('stdin', file)
            nomsu\run(file, Source('stdin',1,#file))
        else
            nomsu\run_file(filename)

    if #parse_errs > 0
        io.stderr\write table.concat(parse_errs, "\n\n")
        io.stderr\flush!
        os.exit(EXIT_FAILURE)
    elseif args.syntax
        os.exit(EXIT_SUCCESS)

    if args.interactive
        -- REPL
        nomsu\run 'say "\\n\\(bright)\\(underscore)Welcome to the Nomsu v\\(Nomsu version) interactive console!\\(reset color)\\n     press \'enter\' twice to run a command\\n"'
        ready_to_quit = false
        nomsu.A_quit = ->
            export ready_to_quit
            ready_to_quit = true
            print("Goodbye!")
        nomsu.A_exit = nomsu.A_quit
        nomsu.A_help = ->
            print("This is the Nomsu v#{nomsu.A_Nomsu_version()} interactive console.")
            print("You can type in Nomsu code here and hit 'enter' twice to run it.")
            print("To exit, type 'exit' or 'quit' and hit enter twice")
        for repl_line=1,math.huge
            io.write(colored.bright colored.yellow ">> ")
            buff = {}
            while true
                io.write(colors.bright)
                line = io.read("*L")
                io.write(colors.reset)
                if line == "\n" or not line
                    if #buff > 0
                        io.write("\027[1A\027[2K")
                    break -- Run buffer
                line = line\gsub("\t", "    ")
                table.insert buff, line
                io.write(colored.dim colored.yellow ".. ")
            if #buff == 0
                break -- Exit
            
            buff = table.concat(buff)
            pseudo_filename = "user input #"..repl_line
            files.spoof(pseudo_filename, buff)
            err_hand = (error_message)->
                Errhand.print_error error_message
            ok, ret = xpcall(nomsu.run, err_hand, nomsu, buff, Source(pseudo_filename, 1, #buff))
            if ok and ret != nil
                print "= "..repr(ret)
            elseif not ok
                Errhand.print_error ret
            if ready_to_quit
                break

has_ldt, ldt = pcall(require,'ldt')
if has_ldt
    ldt.guard(run)
else
    Errhand.run_safely(run)