-- This file defines the environment in which Nomsu code runs, including some
-- basic bootstrapping functionality.
{:NomsuCode, :LuaCode, :Source} = require "code_obj"
{:List, :Dict} = require 'containers'
Text = require 'text'
SyntaxTree = require "syntax_tree"
Files = require "files"
Errhand = require "error_handling"
C = require "colors"
make_parser = require("parser")
pretty_error = require("pretty_errors")
make_tree = (tree, userdata)->
tree.source = Source(userdata.filename, tree.start, tree.stop)
tree.start, tree.stop = nil, nil
tree = SyntaxTree(tree)
return tree
Parsers = {}
for version=1,NOMSU_VERSION[1]
local peg_file
if package.nomsupath
pegpath = package.nomsupath\gsub("lib/%?%.nom", "?.peg")\gsub("lib/%?%.lua", "?.peg")
if path = package.searchpath("nomsu.#{version}", pegpath, "/")
peg_file = io.open(path)
else
peg_file = io.open("nomsu.#{version}.peg")
assert peg_file, "No PEG file found for Nomsu version #{version}"
peg_contents = peg_file\read('*a')
peg_file\close!
Parsers[version] = make_parser(peg_contents, make_tree)
{:tree_to_nomsu, :tree_to_inline_nomsu} = require "nomsu_decompiler"
{:compile, :fail_at} = require('nomsu_compiler')
_module_imports = {}
_importer_mt = {__index: (k)=> _module_imports[@][k]}
Importer = (t, imports)->
_module_imports[t] = imports or {}
t._IMPORTS = _module_imports[t]
return setmetatable(t, _importer_mt)
_1_as_text = (x)->
if x == true then return "yes"
if x == false then return "no"
return tostring(x)
nomsu_pairs = =>
mt = getmetatable(@)
if mt and mt.__next
return mt.__next, @, nil
else
return next, @, nil
inext = if _VERSION == "Lua 5.2" or _VERSION == "Lua 5.1"
inext = (i)=>
value = @[i+1]
return i+1, value if value != nil
else ipairs{}
nomsu_ipairs = =>
mt = getmetatable(@)
if mt and mt.__inext
return mt.__inext, @, 0
else
return inext, @, 0
local nomsu_environment
nomsu_environment = Importer{
-- Lua stuff:
:next, :inext, unpack: unpack or table.unpack, :setmetatable, :rawequal, :getmetatable, :pcall,
yield:coroutine.yield, resume:coroutine.resume, coroutine_status_of:coroutine.status,
coroutine_wrap:coroutine.wrap, coroutine_from: coroutine.create,
:error, :package, :os, :require, :tonumber, :tostring, :string, :xpcall,
:print, :loadfile, :rawset, :_VERSION, :collectgarbage, :rawget, :rawlen,
:table, :assert, :dofile, :loadstring, lua_type_of:type, :select, :math, :io, :load,
pairs:nomsu_pairs, :ipairs, _ipairs:nomsu_ipairs, :jit,
:_VERSION, LUA_VERSION: (jit and jit.version or _VERSION),
LUA_API: _VERSION, Bit: (jit or _VERSION == "Lua 5.2") and require('bitops') or nil
-- Nomsu types:
a_List:List, a_Dict:Dict, Text:Text,
-- Utilities and misc.
lpeg:lpeg, re:re, Files:Files,
:SyntaxTree, TESTS: Dict({}), globals: Dict({}),
:LuaCode, :NomsuCode, :Source
LuaCode_from: ((src, ...)-> LuaCode\from(src, ...)),
NomsuCode_from: ((src, ...)-> NomsuCode\from(src, ...)),
enhance_error: Errhand.enhance_error
SOURCE_MAP: {},
getfenv:getfenv,
-- Nomsu functions:
_1_as_nomsu:tree_to_nomsu, _1_as_inline_nomsu:tree_to_inline_nomsu,
compile: compile, at_1_fail:fail_at, :_1_as_text, :_1_as_an_iterable,
exit:os.exit, quit:os.exit,
_1_parsed: (nomsu_code, syntax_version)->
if type(nomsu_code) == 'string'
filename = Files.spoof(nomsu_code)
nomsu_code = NomsuCode\from(Source(filename, 1, #nomsu_code), nomsu_code)
source = nomsu_code.source
nomsu_code = tostring(nomsu_code)
version = nomsu_code\match("^#![^\n]*nomsu[ ]+-V[ ]*([0-9.]+)")
if syntax_version
syntax_version = tonumber(syntax_version\match("^[0-9]+"))
syntax_version or= version and tonumber(version\match("^[0-9]+")) or NOMSU_VERSION[1]
parse = Parsers[syntax_version]
assert parse, "No parser found for Nomsu syntax version #{syntax_version}"
tree = parse(nomsu_code, source.filename)
if tree.shebang
shebang_version = tree.shebang\match("nomsu %-V[ ]*([%d.]+)")
if shebang_version and shebang_version != ""
tree.version or= List[tonumber(v) for v in shebang_version\gmatch("%d+")]
--if tree.version and tree.version < NOMSU_VERSION\up_to(#tree.version) and not package.nomsuloaded["compatibility"]
-- export loading_compat
-- unless loading_compat
-- loading_compat = true
-- nomsu_environment\export "compatibility"
-- loading_compat = false
return tree
Module: (package_name)=>
-- This *must* be the first local
local path
if package_name\match("%.nom$") or package_name\match("%.lua")
path = package_name
else
path, err = package.searchpath(package_name, package.nomsupath, "/")
if not path then error(err)
path = path\gsub("^%./", "")
if ret = package.nomsuloaded[package_name] or package.nomsuloaded[path]
return ret
-- Traverse up the callstack to look for import loops
-- This is more reliable than keeping a list of running files, since
-- that gets messed up when errors occur.
currently_running = {}
for i=2,999
info = debug.getinfo(i, 'f')
break unless info.func
if info.func == @Module
n, upper_path = debug.getlocal(i, 3) -- 3 means "path"
table.insert(currently_running, upper_path)
assert(n == "path")
if upper_path == path
--circle = "\n "..table.concat(currently_running, "\n..imports ")
circle = table.concat(currently_running, "', which imports '")
err_i = 2
info = debug.getinfo(err_i)
while info and (info.func == @Module or info.func == @use or info.func == @export)
err_i += 1
info = debug.getinfo(err_i)
fail_at (info or debug.getinfo(2)), "Circular import: File '#{path}' imports '"..circle.."'"
mod = @new_environment!
mod.MODULE_NAME = package_name
code = Files.read(path)
if path\match("%.lua$")
code = LuaCode\from(Source(path, 1, #code), code)
else
code = NomsuCode\from(Source(path, 1, #code), code)
ret = mod\run(code)
if ret != nil
mod = ret
package.nomsuloaded[package_name] = mod
package.nomsuloaded[path] = mod
return mod
use: (package_name)=>
mod = @Module(package_name)
imports = assert _module_imports[@]
for k,v in pairs(mod)
imports[k] = v
cr_imports = assert _module_imports[@COMPILE_RULES]
if mod.COMPILE_RULES
for k,v in pairs(mod.COMPILE_RULES)
cr_imports[k] = v
return mod
export: (package_name)=>
mod = @Module(package_name)
imports = assert _module_imports[@]
for k,v in pairs(_module_imports[mod])
if rawget(imports, k) == nil
imports[k] = v
for k,v in pairs(mod)
if rawget(@, k) == nil
@[k] = v
cr_imports = assert _module_imports[@COMPILE_RULES]
if mod.COMPILE_RULES
for k,v in pairs(_module_imports[mod.COMPILE_RULES])
if rawget(cr_imports, k) == nil
cr_imports[k] = v
for k,v in pairs(mod.COMPILE_RULES)
if rawget(@COMPILE_RULES, k) == nil
@COMPILE_RULES[k] = v
return mod
run: (to_run)=>
if not to_run
error("Need both something to run and an environment")
if type(to_run) == 'string'
filename = Files.spoof(to_run)
to_run = NomsuCode\from(Source(filename, 1, #to_run), to_run)
return @run(to_run)
elseif NomsuCode\is_instance(to_run)
tree = @._1_parsed(to_run)
return nil if tree == nil
return @run(tree)
elseif SyntaxTree\is_instance(to_run)
filename = to_run.source.filename\gsub("\n.*", "...")
version = to_run.version
if to_run.type != "FileChunks"
to_run = {to_run}
-- Each chunk's compilation is affected by the code in the previous chunks
-- (typically), so each chunk needs to compile and run before the next one
-- compiles.
ret = nil
for chunk_no, chunk in ipairs to_run
chunk.version = version
lua = @compile(chunk)
lua\declare_locals!
lua\prepend "-- File: #{filename} chunk ##{chunk_no}\n"
ret = @run(lua)
return ret
elseif LuaCode\is_instance(to_run)
source = to_run.source
lua_string = to_run\text!
-- For some reason, Lua doesn't strip shebangs from Lua files
lua_string = lua_string\gsub("^#![^\n]*\n","")
-- If you replace tostring(source) with "nil", source mapping won't happen
run_lua_fn, err = load(lua_string, tostring(source), "t", @)
if not run_lua_fn
lines =[("%3d|%s")\format(i,line) for i, line in ipairs lua_string\lines!]
line_numbered_lua = table.concat(lines, "\n")
error("Failed to compile generated code:\n#{C("bright blue", line_numbered_lua)}\n\n#{err}", 0)
source_key = tostring(source)
unless @SOURCE_MAP[source_key] or @OPTIMIZATION >= 2
map = {}
file = Files.read(source.filename)
if not file
error "Failed to find file: #{source.filename}"
nomsu_str = file\sub(source.start, source.stop)
lua_line = 1
nomsu_line = Files.get_line_number(file, source.start)
map_sources = (s)->
if type(s) == 'string'
for nl in s\gmatch("\n")
map[lua_line] or= nomsu_line
lua_line += 1
else
if s.source and s.source.filename == source.filename
nomsu_line = Files.get_line_number(file, s.source.start)
for b in *s.bits do map_sources(b)
map_sources(to_run)
map[lua_line] or= nomsu_line
map[0] = 0
-- Mapping from lua line number to nomsu line numbers
@SOURCE_MAP[source_key] = map
return run_lua_fn!
else
error("Attempt to run unknown thing: ".._1_as_lua(to_run))
new_environment: ->
env = Importer({}, {k,v for k,v in pairs(nomsu_environment)})
env._ENV = env
env._G = env
env.TESTS = Dict{}
env.COMPILE_RULES = Importer({}, {k,v for k,v in pairs(nomsu_environment.COMPILE_RULES)})
return env
}
nomsu_environment._ENV = nomsu_environment
nomsu_environment._G = nomsu_environment
nomsu_environment.COMPILE_RULES = Importer(require('bootstrap'))
nomsu_environment.MODULE_NAME = "nomsu"
-- Hacky use of globals:
export SOURCE_MAP
SOURCE_MAP = nomsu_environment.SOURCE_MAP
return nomsu_environment