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 AST_COMPILE_ERROR_NUMBER = -1
10 RUNTIME_ERROR_NUMBER = -3
11 BYTECODE_SYNTHESE_ERROR_NUMBER = -100
13 -{ extension 'match' }
15 function spring_pcall (f, arg, name)
16 -- FIXME: won't work if `arg' or `name' contain a backslash-escaped quot char.
17 arg = arg :gsub ("'", "\\'")
18 name = name :gsub ("'", "\\'")
19 local pattern = [[lua -l metalua.mlc -l serialize -e "print(serialize(%s('%s', '%s')))"]]
20 local cmd = string.format (pattern, f, arg, name)
21 --print ("Running the following process: " .. cmd)
22 local fd = io.popen (cmd)
23 local data = fd:read '*a'
26 local ast_builder, msg = lua_loadstring(data)
27 if not ast_builder then error ("can't compile data: "..msg) end
28 local ast = ast_builder()
35 local acc_chunk = |kind| |arg| table.insert (chunks, { tag=kind, arg })
39 { short = 'f', long = 'file', type = 'string', action = acc_chunk 'File',
40 usage = 'load a file to compile and/or run'
42 { short = 'l', long = 'library', type = 'string', action = acc_chunk 'Library',
43 usage = 'load a libary from the standard paths'
45 { short = 'e', long = 'literal', type = 'string', action = acc_chunk 'Literal',
46 usage = 'load a literal piece of source code'
48 -- What to do with chunks
49 { short = 'o', long = 'output', type = 'string',
50 usage = 'set the target name of the next compiled file'
52 { short = 'x', long = 'run', type = 'boolean',
53 usage = 'execute the compiled file instead of saving it (unless -o is also used)'
55 { short = 'i', long = 'interactive', type = 'boolean',
56 usage = 'run an interactive loop after having run other files'
59 { short = 'v', long = 'verbose', type = 'boolean',
60 usage = 'verbose mode'
62 { short = 'a', long = 'print-ast', type = 'boolean',
63 usage = 'print the AST resulting from file compilation'
65 { short = 'A', long = 'print-ast-lineinfo', type = 'boolean',
66 usage = 'print the AST resulting from file compilation, including lineinfo data'
68 { short = 'b', long = 'metabugs', type = 'boolean',
69 usage = 'show syntax errors as compile-time execution errors'
71 { short = 's', long = 'sharpbang', type = 'string',
72 usage = 'set a first line to add to compiled file, typically "#!/bin/env mlr"'
74 { long = 'no-runtime', type = 'boolean',
75 usage = "prevent the automatic requirement of metalua runtime"
77 { long = '', short = 'p', type = '*',
78 action= function (newargs) runargs=table.icat(runargs, newargs) end,
79 usage = "pass all remaining arguments to the program"
83 Compile and/or execute metalua programs. Parameters passed to the
84 compiler should be prefixed with an option flag, hinting what must be
85 done with them: take tham as file names to compile, as library names
86 to load, as parameters passed to the running program... When option
87 flags lack, metalua tries to adopt a "Do What I Mean" approach:
89 - if no code (no library, no literal expression and no file) is
90 specified, the first flag-less parameter is taken as a file name to
93 - if no code and no parameter is passed, an interactive loop is
96 - if a target file is specified with --output, the program is not
97 executed by default, unless a --run flag forces it to. Conversely,
98 if no --output target is specified, the code is run unless ++run
102 local function main (...)
104 local cfg = parser(...)
106 -------------------------------------------------------------------
107 -- Print messages if in verbose mode
108 -------------------------------------------------------------------
109 local function verb_print (fmt, ...)
111 return printf ("[ "..fmt.." ]", ...)
116 verb_print("raw options: %s", table.tostring(cfg))
119 -------------------------------------------------------------------
120 -- If there's no chunk but there are params, interpret the first
121 -- param as a file name.
122 if #chunks==0 and cfg.params then
123 local the_file = table.remove(cfg.params, 1)
124 verb_print("Param %q considered as a source file", the_file)
125 chunks = { `File{ the_file } }
128 -------------------------------------------------------------------
129 -- If nothing to do, run REPL loop
130 if #chunks==0 and cfg.interactive==nil then
131 verb_print "Nothing to compile nor run, force interactive loop"
136 -------------------------------------------------------------------
137 -- Run if asked to, or if no --output has been given
138 -- if cfg.run==false it's been *forced* to false, don't override.
139 if cfg.run==nil and not cfg.output then
140 verb_print("No output file specified; I'll run the program")
146 -------------------------------------------------------------------
147 -- Get ASTs from sources
149 for x in values(chunks) do
150 verb_print("Compiling %s", table.tostring(x))
153 | `Library{ l } -> st, ast = true, `Call{ `Id 'require', `String{ l } }
154 | `Literal{ e } -> st, ast = spring_pcall('mlc.ast_of_luastring', e, 'literal')
156 st, ast = spring_pcall('mlc.ast_of_luafile', f, '@'..f)
157 -- Isolate each file in a separate fenv
159 ast = +{ function (...) -{ast} end (...) }
160 ast.source = '@'..f -- TODO [EVE]
161 code.source = '@'..f -- TODO [EVE]
166 printf ("Cannot compile %s: %s", table.tostring(x), ast or "no msg")
167 os.exit (AST_COMPILE_ERROR_NUMBER)
170 table.insert(code, ast)
172 -- The last file returns the whole chunk's result
174 local c = table.shallow_copy(last_file)
175 last_file <- `Return{ source = c.source, c }
178 -------------------------------------------------------------------
180 if cfg['print-ast'] or cfg['print-ast-lineinfo'] then
181 verb_print "Resulting AST:"
182 for x in ivalues(code) do
183 printf("--- AST From %s: ---", table.tostring(x.source, 'nohash'))
184 if x.origin and x.origin.tag=='File' then x=x[1][1][2][1] end
185 if cfg['print-ast-lineinfo'] then table.print(x, 80, "indent1")
186 else table.print(x, 80, 'nohash') end
190 -------------------------------------------------------------------
191 -- Insert runtime loader
192 if cfg['no-runtime'] then
193 verb_print "Prevent insertion of command \"require 'metalua.runtime'\""
195 table.insert(code, 1, +{require'metalua.runtime'})
198 -- FIXME: check for failures
199 mlc.metabugs = cfg.metabugs
200 local bytecode = mlc.luacstring_of_ast (code)
203 -------------------------------------------------------------------
204 -- Insert #!... command
205 if cfg.sharpbang then
206 verb_print ("Adding sharp-bang directive %q", cfg.sharpbang)
207 if not cfg.sharpbang:strmatch'^#!' then cfg.sharpbang='#!'..cfg.sharpbang end
208 if not cfg.sharpbang:strmatch'\n$' then cfg.sharpbang=cfg.sharpbang..'\n' end
209 bytecode = cfg.sharpbang..bytecode
212 -------------------------------------------------------------------
216 verb_print ("Saving to file %q", cfg.output)
217 local file, err_msg = io.open(cfg.output, 'wb')
218 if not file then error("can't open output file: "..err_msg) end
221 if cfg.sharpbang and os.getenv "OS" ~= "Windows_NT" then
222 pcall(os.execute, 'chmod a+x "'..cfg.output..'"')
226 -------------------------------------------------------------------
230 local f = mlc.function_of_luacstring (bytecode)
232 -- FIXME: isolate execution in a ring
233 -- FIXME: check for failures
235 runargs = table.icat(cfg.params or { }, runargs)
236 local st, msg = pcall(f, unpack (runargs))
239 os.exit(RUNTIME_ERROR_NUMBER)
243 -------------------------------------------------------------------
245 if cfg.interactive then
246 verb_print "Starting REPL loop"
247 require 'metalua.metaloop'