1 --*-lua-*- Set as a metalua file because it requires some metalua libs
3 --require 'verbose_require'
5 require 'metalua.compiler'
6 require 'metalua.clopts'
9 local mfast = os.getenv 'LUA_NOSPRINGS'
10 local has_springs = mfast~='yes' and mfast~='true' and pcall(require, 'springs')
12 function spring_pcall(...)
13 local ring = springs.new()
14 ring:dostring (INIT_COMPILATION_RING)
15 st, ast = ring:pcall(...)
20 function spring_pcall(f, ...)
21 if type(f)=='string' then f = loadstring("return "..f)() end
27 AST_COMPILE_ERROR_NUMBER = -1
28 RUNTIME_ERROR_NUMBER = -3
29 BYTECODE_SYNTHESE_ERROR_NUMBER = -100
31 -{ extension 'match' }
36 local acc_chunk = |kind| function (arg)
37 table.insert (chunks, { tag=kind, arg })
42 { short = 'f', long = 'file', type = 'string', action = acc_chunk 'File',
43 usage = 'load a file to compile and/or run'
45 { short = 'l', long = 'library', type = 'string', action = acc_chunk 'Library',
46 usage = 'load a libary from the standard paths'
48 { short = 'e', long = 'literal', type = 'string', action = acc_chunk 'Literal',
49 usage = 'load a literal piece of source code'
51 -- What to do with chunks
52 { short = 'o', long = 'output', type = 'string',
53 usage = 'set the target name of the next compiled file'
55 { short = 'x', long = 'run', type = 'boolean',
56 usage = 'execute the compiled file instead of saving it (unless -o is also used)'
58 { short = 'i', long = 'interactive', type = 'boolean',
59 usage = 'run an interactive loop after having run other files'
62 { short = 'v', long = 'verbose', type = 'boolean',
63 usage = 'verbose mode'
65 { short = 'a', long = 'print-ast', type = 'boolean',
66 usage = 'print the AST resulting from file compilation'
68 { short = 'A', long = 'print-ast-lineinfo', type = 'boolean',
69 usage = 'print the AST resulting from file compilation, including lineinfo data'
71 { short = 'b', long = 'metabugs', type = 'boolean',
72 usage = 'show syntax errors as compile-time execution errors'
74 { short = 's', long = 'sharpbang', type = 'string',
75 usage = 'set a first line to add to compiled file, typically "#!/bin/env mlr"'
77 { long = 'no-runtime', type = 'boolean',
78 usage = "prevent the automatic requirement of metalua runtime"
80 { long = '', short = 'p', type = '*',
81 action= function (newargs) runargs=table.icat(runargs, newargs) end,
82 usage = "pass all remaining arguments to the program"
86 Compile and/or execute metalua programs. Parameters passed to the
87 compiler should be prefixed with an option flag, hinting what must be
88 done with them: take tham as file names to compile, as library names
89 to load, as parameters passed to the running program... When option
90 flags lack, metalua tries to adopt a "Do What I Mean" approach:
92 - if no code (no library, no literal expression and no file) is
93 specified, the first flag-less parameter is taken as a file name to
96 - if no code and no parameter is passed, an interactive loop is
99 - if a target file is specified with --output, the program is not
100 executed by default, unless a --run flag forces it to. Conversely,
101 if no --output target is specified, the code is run unless ++run
106 INIT_COMPILATION_RING = [[require 'metalua.compiler']]
108 local function main (...)
110 local cfg = parser(...)
112 -------------------------------------------------------------------
113 -- Print messages if in verbose mode
114 -------------------------------------------------------------------
115 local function verb_print (fmt, ...)
117 return printf ("[ "..fmt.." ]", ...)
122 verb_print("raw options: %s", table.tostring(cfg))
125 -------------------------------------------------------------------
126 -- If there's no chunk but there are params, interpret the first
127 -- param as a file name.
128 if #chunks==0 and cfg.params then
129 local the_file = table.remove(cfg.params, 1)
130 verb_print("Param %q considered as a source file", the_file)
131 chunks = { `File{ the_file } }
134 -------------------------------------------------------------------
135 -- If nothing to do, run REPL loop
136 if #chunks==0 and cfg.interactive==nil then
137 verb_print "Nothing to compile nor run, force interactive loop"
142 -------------------------------------------------------------------
143 -- Run if asked to, or if no --output has been given
144 -- if cfg.run==false it's been *forced* to false, don't override.
145 if cfg.run==nil and not cfg.output then
146 verb_print("No output file specified; I'll run the program")
152 -------------------------------------------------------------------
153 -- Get ASTs from sources
155 for x in values(chunks) do
156 verb_print("Compiling %s", table.tostring(x))
159 | `Library{ l } -> st, ast = true, `Call{ `Id 'require', `String{ l } }
160 | `Literal{ e } -> st, ast = spring_pcall('mlc.ast_of_luastring', e, 'literal')
162 st, ast = spring_pcall('mlc.ast_of_luafile', f, '@'..f)
163 -- Isolate each file in a separate fenv
165 ast = +{ function (...) -{ast} end (...) }
166 ast.source = '@'..f -- TODO [EVE]
167 code.source = '@'..f -- TODO [EVE]
172 printf ("Cannot compile %s: %s", table.tostring(x), ast)
173 os.exit (AST_COMPILE_ERROR_NUMBER)
176 table.insert(code, ast)
178 -- The last file returns the whole chunk's result
180 local c = table.shallow_copy(last_file)
181 last_file <- `Return{ source = c.source, c }
184 -------------------------------------------------------------------
186 if cfg['print-ast'] or cfg['print-ast-lineinfo'] then
187 verb_print "Resulting AST:"
188 for x in ivalues(code) do
189 printf("--- AST From %s: ---", table.tostring(x.source, 'nohash'))
190 if x.origin and x.origin.tag=='File' then x=x[1][1][2][1] end
191 if cfg['print-ast-lineinfo'] then table.print(x, 80, "indent1")
192 else table.print(x, 80, 'nohash') end
196 -------------------------------------------------------------------
197 -- Insert runtime loader
198 if cfg['no-runtime'] then
199 verb_print "Prevent insertion of command \"require 'metalua.runtime'\""
201 table.insert(code, 1, +{require'metalua.runtime'})
204 -- FIXME: check for failures
205 mlc.metabugs = cfg.metabugs
206 local bytecode = mlc.luacstring_of_ast (code)
209 -------------------------------------------------------------------
210 -- Insert #!... command
211 if cfg.sharpbang then
212 verb_print ("Adding sharp-bang directive %q", cfg.sharpbang)
213 if not cfg.sharpbang:strmatch'^#!' then cfg.sharpbang='#!'..cfg.sharpbang end
214 if not cfg.sharpbang:strmatch'\n$' then cfg.sharpbang=cfg.sharpbang..'\n' end
215 bytecode = cfg.sharpbang..bytecode
218 -------------------------------------------------------------------
222 verb_print ("Saving to file %q", cfg.output)
223 local file, err_msg = io.open(cfg.output, 'wb')
224 if not file then error("can't open output file: "..err_msg) end
227 if cfg.sharpbang and os.getenv "OS" ~= "Windows_NT" then
228 pcall(os.execute, 'chmod a+x "'..cfg.output..'"')
232 -------------------------------------------------------------------
236 local f = mlc.function_of_luacstring (bytecode)
238 -- FIXME: isolate execution in a ring
239 -- FIXME: check for failures
241 runargs = table.icat(cfg.params or { }, runargs)
242 local st, msg = pcall(f, unpack (runargs))
245 os.exit(RUNTIME_ERROR_NUMBER)
249 -------------------------------------------------------------------
251 if cfg.interactive then
252 verb_print "Starting REPL loop"
253 require 'metalua.metaloop'
255 -- print ("*":rep(70))
256 -- print "*** !!! Interactive loop not implemented !!!"
257 -- print ("*":rep(70))