251 lines
10 KiB
Plaintext
251 lines
10 KiB
Plaintext
-- This file defines the environment in which Nomsu code runs, including some
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-- basic bootstrapping functionality.
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{:NomsuCode, :LuaCode, :Source} = require "code_obj"
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{:List, :Dict, :Text} = require 'containers'
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SyntaxTree = require "syntax_tree"
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Files = require "files"
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make_parser = require("parser")
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pretty_error = require("pretty_errors")
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make_tree = (tree, userdata)->
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tree.source = Source(userdata.filename, tree.start, tree.stop)
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tree.start, tree.stop = nil, nil
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tree = SyntaxTree(tree)
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return tree
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table.map = (t, fn)-> setmetatable([fn(v) for _,v in ipairs(t)], getmetatable(t))
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Parsers = {}
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max_parser_version = 0
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for version=1,999
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local peg_file
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if package.nomsupath
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pegpath = package.nomsupath\gsub("lib/%?%.nom", "?.peg")\gsub("lib/%?%.lua", "?.peg")
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if path = package.searchpath("nomsu.#{version}", pegpath, "/")
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peg_file = io.open(path)
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else
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peg_file = io.open("nomsu.#{version}.peg")
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break unless peg_file
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max_parser_version = version
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peg_contents = peg_file\read('*a')
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peg_file\close!
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Parsers[version] = make_parser(peg_contents, make_tree)
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{:tree_to_nomsu, :tree_to_inline_nomsu} = require "nomsu_decompiler"
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{:compile, :fail_at} = require('nomsu_compiler')
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_currently_running_files = List{} -- Used to check for circular imports in run_file_1_in
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_module_imports = {}
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_importer_mt = {__index: (k)=> _module_imports[@][k]}
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Importer = (t, imports)->
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_module_imports[t] = imports or {}
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t._IMPORTS = _module_imports[t]
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return setmetatable(t, _importer_mt)
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local nomsu_environment
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nomsu_environment = Importer{
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NOMSU_COMPILER_VERSION: 13, NOMSU_SYNTAX_VERSION: max_parser_version
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-- Lua stuff:
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:next, unpack: unpack or table.unpack, :setmetatable, :rawequal, :getmetatable, :pcall,
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yield:coroutine.yield, resume:coroutine.resume, coroutine_status_of:coroutine.status,
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coroutine_wrap:coroutine.wrap, coroutine_from: coroutine.create,
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:error, :package, :os, :require, :tonumber, :tostring, :string, :xpcall,
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say:print, :loadfile, :rawset, :_VERSION, :collectgarbage, :rawget, :rawlen,
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:table, :assert, :dofile, :loadstring, lua_type_of:type, :select, :math, :io, :load,
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:pairs, :ipairs, :jit, :_VERSION
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bit: (jit or _VERSION == "Lua 5.2") and require('bitops') or nil
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-- Nomsu types:
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List:List, Dict:Dict,
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-- Utilities and misc.
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lpeg:lpeg, re:re, Files:Files,
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:SyntaxTree, TESTS: Dict({}), globals: Dict({}),
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:LuaCode, :NomsuCode, :Source
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LuaCode_from: ((src, ...)-> LuaCode\from(src, ...)),
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NomsuCode_from: ((src, ...)-> NomsuCode\from(src, ...)),
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SOURCE_MAP: {},
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getfenv:getfenv,
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-- Nomsu functions:
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_1_as_nomsu:tree_to_nomsu, _1_as_inline_nomsu:tree_to_inline_nomsu,
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compile: compile, at_1_fail:fail_at,
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exit:os.exit, quit:os.exit,
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_1_parsed: (nomsu_code, syntax_version)->
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if type(nomsu_code) == 'string'
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filename = Files.spoof(nomsu_code)
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nomsu_code = NomsuCode\from(Source(filename, 1, #nomsu_code), nomsu_code)
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source = nomsu_code.source
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nomsu_code = tostring(nomsu_code)
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version = nomsu_code\match("^#![^\n]*nomsu[ ]+-V[ ]*([0-9.]+)")
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if syntax_version
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syntax_version = tonumber(syntax_version\match("^[0-9]+"))
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syntax_version or= version and tonumber(version\match("^[0-9]+")) or max_parser_version
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parse = Parsers[syntax_version] or Parsers[max_parser_version]
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tree = parse(nomsu_code, source.filename)
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if tree.shebang
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tree.version or= tree.shebang\match("nomsu %-V[ ]*([%d.]*)")
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errs = {}
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find_errors = (t)->
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if t.type == "Error"
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errs[#errs+1] = t
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else
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for k,v in pairs(t)
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continue unless SyntaxTree\is_instance(v)
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find_errors(v)
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find_errors(tree)
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num_errs = #errs
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if num_errs > 0
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err_strings = [pretty_error{
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title:"Parse error"
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error:e.error, hint:e.hint, source:e\get_source_file!
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start:e.source.start, stop:e.source.stop, filename:e.source.filename
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} for i, e in ipairs(errs) when i <= 3]
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if num_errs > #err_strings
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table.insert(err_strings, "\027[31;1m +#{num_errs-#err_strings} additional errors...\027[0m\n")
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error(table.concat(err_strings, '\n\n'), 0)
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return tree
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Module: (package_name)=>
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local path
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if package_name\match("%.nom$") or package_name\match("%.lua")
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path = package_name
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else
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path, err = package.searchpath(package_name, package.nomsupath, "/")
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if not path then error(err)
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path = path\gsub("^%./", "")
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if ret = package.nomsuloaded[package_name] or package.nomsuloaded[path]
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return ret
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if _currently_running_files\has(path)
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i = _currently_running_files\index_of(path)
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_currently_running_files\add path
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circle = _currently_running_files\from_1_to(i, -1)
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error("Circular import detected:\n "..circle\joined_with("\n..imports "))
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mod = @new_environment!
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mod.MODULE_NAME = package_name
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code = Files.read(path)
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if path\match("%.lua$")
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code = LuaCode\from(Source(path, 1, #code), code)
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else
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code = NomsuCode\from(Source(path, 1, #code), code)
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_currently_running_files\add path
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mod\run(code)
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_currently_running_files\pop!
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package.nomsuloaded[package_name] = mod
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package.nomsuloaded[path] = mod
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return mod
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use: (package_name)=>
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mod = @Module(package_name)
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imports = assert _module_imports[@]
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for k,v in pairs(mod)
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imports[k] = v
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cr_imports = assert _module_imports[@COMPILE_RULES]
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for k,v in pairs(mod.COMPILE_RULES)
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cr_imports[k] = v
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return mod
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export: (package_name)=>
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mod = @Module(package_name)
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imports = assert _module_imports[@]
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for k,v in pairs(_module_imports[mod])
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if rawget(imports, k) == nil
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imports[k] = v
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for k,v in pairs(mod)
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if rawget(@, k) == nil
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--if k != "_G" and k != "_ENV" and k != "COMPILE_RULES" and k != "MODULE_NAME"
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@[k] = v
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cr_imports = assert _module_imports[@COMPILE_RULES]
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for k,v in pairs(_module_imports[mod.COMPILE_RULES])
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if rawget(cr_imports, k) == nil
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cr_imports[k] = v
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for k,v in pairs(mod.COMPILE_RULES)
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if rawget(@COMPILE_RULES, k) == nil
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@COMPILE_RULES[k] = v
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--for k,v in pairs(mod.TESTS)
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-- if rawget(@TESTS, k) == nil
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-- @TESTS[k] = v
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return mod
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run: (to_run)=>
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if not to_run
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error("Need both something to run and an environment")
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if type(to_run) == 'string'
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filename = Files.spoof(to_run)
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to_run = NomsuCode\from(Source(filename, 1, #to_run), to_run)
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return @run(to_run)
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elseif NomsuCode\is_instance(to_run)
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tree = @._1_parsed(to_run)
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return nil if tree == nil
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return @run(tree)
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elseif SyntaxTree\is_instance(to_run)
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filename = to_run.source.filename\gsub("\n.*", "...")
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if to_run.type != "FileChunks"
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to_run = {to_run}
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-- Each chunk's compilation is affected by the code in the previous chunks
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-- (typically), so each chunk needs to compile and run before the next one
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-- compiles.
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ret = nil
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for chunk_no, chunk in ipairs to_run
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lua = @compile(chunk)
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lua\declare_locals!
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lua\prepend "-- File: #{filename} chunk ##{chunk_no}\n"
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ret = @run(lua)
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return ret
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elseif LuaCode\is_instance(to_run)
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source = to_run.source
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lua_string = to_run\text!
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-- If you replace tostring(source) with "nil", source mapping won't happen
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run_lua_fn, err = load(lua_string, tostring(source), "t", @)
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if not run_lua_fn
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lines =[("%3d|%s")\format(i,line) for i, line in ipairs lua_string\lines!]
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line_numbered_lua = table.concat(lines, "\n")
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error("Failed to compile generated code:\n\027[1;34m#{line_numbered_lua}\027[0m\n\n#{err}", 0)
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source_key = tostring(source)
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unless @SOURCE_MAP[source_key] or @OPTIMIZATION >= 2
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map = {}
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file = Files.read(source.filename)
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if not file
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error "Failed to find file: #{source.filename}"
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nomsu_str = file\sub(source.start, source.stop)
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lua_line = 1
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nomsu_line = Files.get_line_number(file, source.start)
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map_sources = (s)->
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if type(s) == 'string'
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for nl in s\gmatch("\n")
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map[lua_line] or= nomsu_line
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lua_line += 1
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else
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if s.source and s.source.filename == source.filename
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nomsu_line = Files.get_line_number(file, s.source.start)
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for b in *s.bits do map_sources(b)
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map_sources(to_run)
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map[lua_line] or= nomsu_line
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map[0] = 0
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-- Mapping from lua line number to nomsu line numbers
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@SOURCE_MAP[source_key] = map
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return run_lua_fn!
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else
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error("Attempt to run unknown thing: "..tostring(to_run))
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new_environment: ->
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env = Importer({}, {k,v for k,v in pairs(nomsu_environment)})
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env._ENV = env
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env._G = env
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env.TESTS = Dict{}
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env.COMPILE_RULES = Importer({}, {k,v for k,v in pairs(nomsu_environment.COMPILE_RULES)})
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return env
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}
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nomsu_environment._ENV = nomsu_environment
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nomsu_environment._G = nomsu_environment
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nomsu_environment.COMPILE_RULES = Importer(require('bootstrap'))
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nomsu_environment.MODULE_NAME = "nomsu"
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-- Hacky use of globals:
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export SOURCE_MAP
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SOURCE_MAP = nomsu_environment.SOURCE_MAP
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return nomsu_environment
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