Rename REAMDE to README.md
[nit.git] / src / nit.nit
1 # This file is part of NIT ( http://www.nitlanguage.org ).
2 #
3 # Copyright 2012 Jean Privat <jean@pryen.org>
4 #
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
8 #
9 # http://www.apache.org/licenses/LICENSE-2.0
10 #
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
16
17 # A naive Nit interpreter
18 module nit
19
20 import interpreter
21 import frontend
22 import parser_util
23 import vm
24
25 # Create a tool context to handle options and paths
26 var toolcontext = new ToolContext
27 toolcontext.option_context.options_before_rest = true
28 toolcontext.tooldescription = "Usage: nit [OPTION]... <file.nit>...\nInterprets and debugs Nit programs."
29 # Add an option "-o" to enable compatibilit with the tests.sh script
30 var opt = new OptionString("compatibility (does noting)", "-o")
31 toolcontext.option_context.add_option(opt)
32 var opt_eval = new OptionBool("Specifies the program from command-line", "-e")
33 var opt_loop = new OptionBool("Repeatedly run the program for each line in file-name arguments", "-n")
34 var opt_vm = new OptionBool("Run the virtual machine instead of the naive interpreter (experimental)", "--vm")
35 toolcontext.option_context.add_option(opt_eval, opt_loop, opt_vm)
36 # We do not add other options, so process them now!
37 toolcontext.process_options(args)
38
39 # We need a model to collect stufs
40 var model = new Model
41 # An a model builder to parse files
42 var modelbuilder = new ModelBuilder(model, toolcontext)
43
44 var arguments = toolcontext.option_context.rest
45 var progname = arguments.first
46
47 # Here we load an process all modules passed on the command line
48 var mmodules: Array[MModule]
49
50 if opt_eval.value then
51 var amodule = toolcontext.parse_module(progname)
52 toolcontext.check_errors
53
54 var parent = null
55 if opt_loop.value then
56 parent = modelbuilder.get_mmodule_by_name(null, null, "niti_runtime")
57 if parent == null then
58 toolcontext.check_errors
59 abort
60 end
61 end
62
63 modelbuilder.load_rt_module(parent, amodule, "-")
64
65 mmodules = [amodule.mmodule.as(not null)]
66 else
67 mmodules = modelbuilder.parse([progname])
68 end
69
70 modelbuilder.run_phases
71
72 if toolcontext.opt_only_metamodel.value then exit(0)
73
74 var mainmodule = toolcontext.make_main_module(mmodules)
75
76 var self_mm = mainmodule
77 var self_args = arguments
78
79 if toolcontext.opt_debugger_autorun.value then
80 modelbuilder.run_debugger_autorun(self_mm, self_args)
81 else if toolcontext.opt_debugger_mode.value then
82 modelbuilder.run_debugger(self_mm, self_args)
83 else if opt_vm.value then
84 modelbuilder.run_virtual_machine(self_mm, self_args)
85 else
86 modelbuilder.run_naive_interpreter(self_mm, self_args)
87 end
88