src/nitvm.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 # The Nit virtual machine launcher
  18 module nitvm
  19
  20 import vm
  21 import frontend::code_gen
  22
  23 # Create a tool context to handle options and paths
  24 var toolcontext = new ToolContext
  25 toolcontext.tooldescription = "Usage: nitvm [OPTION]... <file.nit>...\nExecutes Nit programs with a virtual machine."
  26 # Add an option "-o" to enable compatibility with the tests.sh script
  27 var opt = new OptionString("compatibility (does nothing)", "-o")
  28 toolcontext.option_context.add_option(opt)
  29 var opt_mixins = new OptionArray("Additional modules to min-in", "-m")
  30 toolcontext.option_context.add_option(opt_mixins)
  31 # We do not add other options, so process them now!
  32 toolcontext.process_options(args)
  33
  34 # We need a model to collect stufs
  35 var model = new Model
  36
  37 # Add a model builder to parse files
  38 var modelbuilder = new ModelBuilder(model, toolcontext)
  39
  40 var arguments = toolcontext.option_context.rest
  41 var progname = arguments.first
  42
  43 # Here we load and process all modules passed on the command line
  44 var mmodules = modelbuilder.parse([progname])
  45 mmodules.add_all modelbuilder.parse(opt_mixins.value)
  46 modelbuilder.run_phases
  47
  48 if toolcontext.opt_only_metamodel.value then toolcontext.quit
  49
  50 var mainmodule: nullable MModule
  51
  52 # Here we launch the interpreter on the main module
  53 if mmodules.length == 1 then
  54         mainmodule = mmodules.first
  55 else
  56         mainmodule = new MModule(model, null, mmodules.first.name, mmodules.first.location)
  57         mainmodule.set_imported_mmodules(mmodules)
  58 end
  59
  60 var self_mm = mainmodule
  61 var self_args = arguments
  62
  63 modelbuilder.run_virtual_machine(self_mm, self_args)