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)
17 [=[lua -l metalua.compiler -l serialize -e ]=]..
18 [=["print (serialize (%s ([[%s]], [[%s]])))"]=]
19 local cmd = string.format (pattern, f, arg, name)
20 --print ("Running the following process: " .. cmd)
21 local fd = io.popen (cmd)
22 local data = fd:read '*a'
25 local ast_builder, msg = lua_loadstring(data)
26 if not ast_builder then error ("can't compile data: "..msg) end
27 local ast = ast_builder()
34 local acc_chunk = |kind| |arg| table.insert (chunks, { tag=kind, arg })
38 { short = 'f', long = 'file', type = 'string', action = acc_chunk 'File',
39 usage = 'load a file to compile and/or run'
41 { short = 'l', long = 'library', type = 'string', action = acc_chunk 'Library',
42 usage = 'load a libary from the standard paths'
44 { short = 'e', long = 'literal', type = 'string', action = acc_chunk 'Literal',
45 usage = 'load a literal piece of source code'
47 -- What to do with chunks
48 { short = 'o', long = 'output', type = 'string',
49 usage = 'set the target name of the next compiled file'
51 { short = 'x', long = 'run', type = 'boolean',
52 usage = 'execute the compiled file instead of saving it (unless -o is also used)'
54 { short = 'i', long = 'interactive', type = 'boolean',
55 usage = 'run an interactive loop after having run other files'
58 { short = 'v', long = 'verbose', type = 'boolean',
59 usage = 'verbose mode'
61 { short = 'a', long = 'print-ast', type = 'boolean',
62 usage = 'print the AST resulting from file compilation'
64 { short = 'A', long = 'print-ast-lineinfo', type = 'boolean',
65 usage = 'print the AST resulting from file compilation, including lineinfo data'
67 { short = 'b', long = 'metabugs', type = 'boolean',
68 usage = 'show syntax errors as compile-time execution errors'
70 { short = 's', long = 'sharpbang', type = 'string',
71 usage = 'set a first line to add to compiled file, typically "#!/bin/env mlr"'
73 { long = 'no-runtime', type = 'boolean',
74 usage = "prevent the automatic requirement of metalua runtime"
76 { long = '', short = 'p', type = '*',
77 action= function (newargs) runargs=table.icat(runargs, newargs) end,
78 usage = "pass all remaining arguments to the program"
82 Compile and/or execute metalua programs. Parameters passed to the
83 compiler should be prefixed with an option flag, hinting what must be
84 done with them: take tham as file names to compile, as library names
85 to load, as parameters passed to the running program... When option
86 flags lack, metalua tries to adopt a "Do What I Mean" approach:
88 - if no code (no library, no literal expression and no file) is
89 specified, the first flag-less parameter is taken as a file name to
92 - if no code and no parameter is passed, an interactive loop is
95 - if a target file is specified with --output, the program is not
96 executed by default, unless a --run flag forces it to. Conversely,
97 if no --output target is specified, the code is run unless ++run
101 local function main (...)
103 local cfg = parser(...)
105 -------------------------------------------------------------------
106 -- Print messages if in verbose mode
107 -------------------------------------------------------------------
108 local function verb_print (fmt, ...)
110 return printf ("[ "..fmt.." ]", ...)
115 verb_print("raw options: %s", table.tostring(cfg))
118 -------------------------------------------------------------------
119 -- If there's no chunk but there are params, interpret the first
120 -- param as a file name.
121 if #chunks==0 and cfg.params then
122 local the_file = table.remove(cfg.params, 1)
123 verb_print("Param %q considered as a source file", the_file)
124 chunks = { `File{ the_file } }
127 -------------------------------------------------------------------
128 -- If nothing to do, run REPL loop
129 if #chunks==0 and cfg.interactive==nil then
130 verb_print "Nothing to compile nor run, force interactive loop"
135 -------------------------------------------------------------------
136 -- Run if asked to, or if no --output has been given
137 -- if cfg.run==false it's been *forced* to false, don't override.
138 if cfg.run==nil and not cfg.output then
139 verb_print("No output file specified; I'll run the program")
145 -------------------------------------------------------------------
146 -- Get ASTs from sources
148 for x in values(chunks) do
149 verb_print("Compiling %s", table.tostring(x))
152 | `Library{ l } -> st, ast = true, `Call{ `Id 'require', `String{ l } }
153 | `Literal{ e } -> st, ast = spring_pcall('mlc.ast_of_luastring', e, 'literal')
155 st, ast = spring_pcall('mlc.ast_of_luafile', f, '@'..f)
156 -- Isolate each file in a separate fenv
158 ast = +{ function (...) -{ast} end (...) }
159 ast.source = '@'..f -- TODO [EVE]
160 code.source = '@'..f -- TODO [EVE]
165 printf ("Cannot compile %s: %s", table.tostring(x), ast or "no msg")
166 os.exit (AST_COMPILE_ERROR_NUMBER)
169 table.insert(code, ast)
171 -- The last file returns the whole chunk's result
173 local c = table.shallow_copy(last_file)
174 last_file <- `Return{ source = c.source, c }
177 -------------------------------------------------------------------
179 if cfg['print-ast'] or cfg['print-ast-lineinfo'] then
180 verb_print "Resulting AST:"
181 for x in ivalues(code) do
182 printf("--- AST From %s: ---", table.tostring(x.source, 'nohash'))
183 if x.origin and x.origin.tag=='File' then x=x[1][1][2][1] end
184 if cfg['print-ast-lineinfo'] then table.print(x, 80, "indent1")
185 else table.print(x, 80, 'nohash') end
189 -------------------------------------------------------------------
190 -- Insert runtime loader
191 if cfg['no-runtime'] then
192 verb_print "Prevent insertion of command \"require 'metalua.runtime'\""
194 table.insert(code, 1, +{require'metalua.runtime'})
197 -- FIXME: check for failures
198 mlc.metabugs = cfg.metabugs
199 local bytecode = mlc.luacstring_of_ast (code)
202 -------------------------------------------------------------------
203 -- Insert #!... command
204 if cfg.sharpbang then
205 verb_print ("Adding sharp-bang directive %q", cfg.sharpbang)
206 if not cfg.sharpbang:strmatch'^#!' then cfg.sharpbang='#!'..cfg.sharpbang end
207 if not cfg.sharpbang:strmatch'\n$' then cfg.sharpbang=cfg.sharpbang..'\n' end
208 bytecode = cfg.sharpbang..bytecode
211 -------------------------------------------------------------------
215 verb_print ("Saving to file %q", cfg.output)
216 local file, err_msg = io.open(cfg.output, 'wb')
217 if not file then error("can't open output file: "..err_msg) end
220 if cfg.sharpbang and os.getenv "OS" ~= "Windows_NT" then
221 pcall(os.execute, 'chmod a+x "'..cfg.output..'"')
225 -------------------------------------------------------------------
229 local f = mlc.function_of_luacstring (bytecode)
231 -- FIXME: isolate execution in a ring
232 -- FIXME: check for failures
234 runargs = table.icat(cfg.params or { }, runargs)
235 local function print_traceback (errmsg)
236 return errmsg .. '\n' .. debug.traceback ('',2) .. '\n'
238 local st, msg = xpcall(|| f(unpack (runargs)), print_traceback)
241 os.exit(RUNTIME_ERROR_NUMBER)
245 -------------------------------------------------------------------
247 if cfg.interactive then
248 verb_print "Starting REPL loop"
249 require 'metalua.metaloop'