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 ast_src = fd:read '*a'
25 local ast_builder, msg = lua_loadstring(ast_src)
26 if not ast_builder then
27 error ("can't compile data: "..msg)
30 local ast = ast_builder()
37 local acc_chunk = |kind| |arg| table.insert (chunks, { tag=kind, arg })
41 { short = 'f', long = 'file', type = 'string', action = acc_chunk 'File',
42 usage = 'load a file to compile and/or run'
44 { short = 'l', long = 'library', type = 'string', action = acc_chunk 'Library',
45 usage = 'load a libary from the standard paths'
47 { short = 'e', long = 'literal', type = 'string', action = acc_chunk 'Literal',
48 usage = 'load a literal piece of source code'
50 -- What to do with chunks
51 { short = 'o', long = 'output', type = 'string',
52 usage = 'set the target name of the next compiled file'
54 { short = 'x', long = 'run', type = 'boolean',
55 usage = 'execute the compiled file instead of saving it (unless -o is also used)'
57 { short = 'i', long = 'interactive', type = 'boolean',
58 usage = 'run an interactive loop after having run other files'
61 { short = 'v', long = 'verbose', type = 'boolean',
62 usage = 'verbose mode'
64 { short = 'a', long = 'print-ast', type = 'boolean',
65 usage = 'print the AST resulting from file compilation'
67 { short = 'A', long = 'print-ast-lineinfo', type = 'boolean',
68 usage = 'print the AST resulting from file compilation, including lineinfo data'
70 { short = 'b', long = 'metabugs', type = 'boolean',
71 usage = 'show syntax errors as compile-time execution errors'
73 { short = 's', long = 'sharpbang', type = 'string',
74 usage = 'set a first line to add to compiled file, typically "#!/bin/env mlr"'
76 { long = 'no-runtime', type = 'boolean',
77 usage = "prevent the automatic requirement of metalua runtime"
79 { long = '', short = 'p', type = '*',
80 action= function (newargs) runargs=table.icat(runargs, newargs) end,
81 usage = "pass all remaining arguments to the program"
85 Compile and/or execute metalua programs. Parameters passed to the
86 compiler should be prefixed with an option flag, hinting what must be
87 done with them: take tham as file names to compile, as library names
88 to load, as parameters passed to the running program... When option
89 flags lack, metalua tries to adopt a "Do What I Mean" approach:
91 - if no code (no library, no literal expression and no file) is
92 specified, the first flag-less parameter is taken as a file name to
95 - if no code and no parameter is passed, an interactive loop is
98 - if a target file is specified with --output, the program is not
99 executed by default, unless a --run flag forces it to. Conversely,
100 if no --output target is specified, the code is run unless ++run
104 local function main (...)
106 local cfg = parser(...)
108 -------------------------------------------------------------------
109 -- Print messages if in verbose mode
110 -------------------------------------------------------------------
111 local function verb_print (fmt, ...)
113 return printf ("[ "..fmt.." ]", ...)
118 verb_print("raw options: %s", table.tostring(cfg))
121 -------------------------------------------------------------------
122 -- If there's no chunk but there are params, interpret the first
123 -- param as a file name.
124 if #chunks==0 and cfg.params then
125 local the_file = table.remove(cfg.params, 1)
126 verb_print("Param %q considered as a source file", the_file)
127 chunks = { `File{ the_file } }
130 -------------------------------------------------------------------
131 -- If nothing to do, run REPL loop
132 if #chunks==0 and cfg.interactive==nil then
133 verb_print "Nothing to compile nor run, force interactive loop"
138 -------------------------------------------------------------------
139 -- Run if asked to, or if no --output has been given
140 -- if cfg.run==false it's been *forced* to false, don't override.
141 if cfg.run==nil and not cfg.output then
142 verb_print("No output file specified; I'll run the program")
148 -------------------------------------------------------------------
149 -- Get ASTs from sources
151 for x in values(chunks) do
152 verb_print("Compiling %s", table.tostring(x))
155 | `Library{ l } -> st, ast = true, `Call{ `Id 'require', `String{ l } }
156 | `Literal{ e } -> st, ast = spring_pcall('mlc.ast_of_luastring', e, 'literal')
158 st, ast = spring_pcall('mlc.ast_of_luafile', f, '@'..f)
159 -- Isolate each file in a separate fenv
161 ast = +{ function (...) -{ast} end (...) }
162 ast.source = '@'..f -- TODO [EVE]
163 code.source = '@'..f -- TODO [EVE]
168 printf ("Cannot compile %s: %s", table.tostring(x), ast or "no msg")
169 os.exit (AST_COMPILE_ERROR_NUMBER)
172 table.insert(code, ast)
174 -- The last file returns the whole chunk's result
176 local c = table.shallow_copy(last_file)
177 last_file <- `Return{ source = c.source, c }
180 -------------------------------------------------------------------
182 if cfg['print-ast'] or cfg['print-ast-lineinfo'] then
183 verb_print "Resulting AST:"
184 for x in ivalues(code) do
185 printf("--- AST From %s: ---", table.tostring(x.source, 'nohash'))
186 if x.origin and x.origin.tag=='File' then x=x[1][1][2][1] end
187 if cfg['print-ast-lineinfo'] then table.print(x, 80, "indent1")
188 else table.print(x, 80, 'nohash') end
192 -------------------------------------------------------------------
193 -- Insert runtime loader
194 if cfg['no-runtime'] then
195 verb_print "Prevent insertion of command \"require 'metalua.runtime'\""
197 table.insert(code, 1, +{require'metalua.runtime'})
200 -- FIXME: check for failures
201 mlc.metabugs = cfg.metabugs
202 local bytecode = mlc.luacstring_of_ast (code)
205 -------------------------------------------------------------------
206 -- Insert #!... command
207 if cfg.sharpbang then
208 verb_print ("Adding sharp-bang directive %q", cfg.sharpbang)
209 if not cfg.sharpbang:strmatch'^#!' then cfg.sharpbang='#!'..cfg.sharpbang end
210 if not cfg.sharpbang:strmatch'\n$' then cfg.sharpbang=cfg.sharpbang..'\n' end
211 bytecode = cfg.sharpbang..bytecode
214 -------------------------------------------------------------------
218 verb_print ("Saving to file %q", cfg.output)
219 local file, err_msg = io.open(cfg.output, 'wb')
220 if not file then error("can't open output file: "..err_msg) end
223 if cfg.sharpbang and os.getenv "OS" ~= "Windows_NT" then
224 pcall(os.execute, 'chmod a+x "'..cfg.output..'"')
228 -------------------------------------------------------------------
232 local f = mlc.function_of_luacstring (bytecode)
234 -- FIXME: isolate execution in a ring
235 -- FIXME: check for failures
237 runargs = table.icat(cfg.params or { }, runargs)
238 local function print_traceback (errmsg)
239 return errmsg .. '\n' .. debug.traceback ('',2) .. '\n'
241 local st, msg = xpcall(|| f(unpack (runargs)), print_traceback)
244 os.exit(RUNTIME_ERROR_NUMBER)
248 -------------------------------------------------------------------
250 if cfg.interactive then
251 verb_print "Starting REPL loop"
252 require 'metalua.metaloop'