#!/usr/bin/python3 -tt # Copyright 2012 Jussi Pakkanen # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # http://www.apache.org/licenses/LICENSE-2.0 # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import mparser import nodes import environment import coredata import dependencies import os, sys, platform, copy class InterpreterException(coredata.MesonException): pass class InvalidCode(InterpreterException): pass class InvalidArguments(InterpreterException): pass class InterpreterObject(): def __init__(self): self.methods = {} def method_call(self, method_name, args, kwargs): if method_name in self.methods: return self.methods[method_name](args, kwargs) raise InvalidCode('Unknown method "%s" in object.' % method_name) # Interpreter objects can not be pickled so we must have # these wrappers. class ExternalProgramHolder(InterpreterObject): def __init__(self, ep): InterpreterObject.__init__(self) self.ep = ep self.methods.update({'found': self.found_method}) def found_method(self, args, kwargs): return self.found() def found(self): return self.ep.found() def get_command(self): return self.ep.fullpath def get_name(self): return self.ep.name class ExternalLibraryHolder(InterpreterObject): def __init__(self, el): InterpreterObject.__init__(self) self.el = el self.methods.update({'found': self.found_method}) def found(self): return self.el.found() def found_method(self, args, kwargs): return self.found() def get_filename(self): return self.el.fullpath def get_name(self): return self.el.name def get_compile_flags(self): return self.el.get_compile_flags() def get_link_flags(self): return self.el.get_link_flags() def get_exe_flags(self): return self.el.get_exe_flags() class Generator(InterpreterObject): def __init__(self, args, kwargs): InterpreterObject.__init__(self) if len(args) != 1: raise InvalidArguments('Generator requires one and only one positional argument') if not isinstance(args[0], Executable) and \ not isinstance(args[0], ExternalProgramHolder): raise InvalidArguments('First generator argument must be an executable object.') self.exe = args[0] self.methods.update({'process' : self.process_method}) self.process_kwargs(kwargs) def get_exe(self): return self.exe def process_kwargs(self, kwargs): if 'arguments' not in kwargs: raise InvalidArguments('Generator must have "arguments" keyword argument.') args = kwargs['arguments'] if isinstance(args, str): args = [args] if not isinstance(args, list): raise InvalidArguments('"Arguments" keyword argument must be a string or a list of strings.') for a in args: if not isinstance(a, str): raise InvalidArguments('A non-string object in "arguments" keyword argument.') self.arglist = args if 'output_name' not in kwargs: raise InvalidArguments('Generator must have "output_name" keyword argument.') rule = kwargs['output_name'] if not isinstance(rule, str): raise InvalidArguments('"output_name" keyword argument must be a string.') if not '@BASENAME@' in rule and not '@PLAINNAME@' in rule: raise InvalidArguments('"output_name" must contain @BASENAME@ or @PLAINNAME@.') if '/' in rule: raise InvalidArguments('"output_name" must not contain a slash.') self.name_rule = rule def get_base_outname(self, inname): plainname = os.path.split(inname)[1] basename = plainname.split('.')[0] return self.name_rule.replace('@BASENAME@', basename).replace('@PLAINNAME@', plainname) def process_method(self, args, kwargs): if len(kwargs) > 0: raise InvalidArguments('Process does not take keyword arguments.') if isinstance(args, str): args = [args] if not isinstance(args, list): raise InvalidArguments('Argument to "process" must be a string or a list of strings.') for a in args: if not isinstance(a, str): raise InvalidArguments('A non-string object in "process" arguments.') gl = GeneratedList(self) [gl.add_file(a) for a in args] return gl def get_arglist(self): return self.arglist class GeneratedList(InterpreterObject): def __init__(self, generator): InterpreterObject.__init__(self) self.generator = generator self.infilelist = [] self.outfilelist = [] def add_file(self, newfile): self.infilelist.append(newfile) self.outfilelist.append(self.generator.get_base_outname(newfile)) def get_infilelist(self): return self.infilelist def get_outfilelist(self): return self.outfilelist def get_generator(self): return self.generator # This currently returns data for the current environment. # It should return info for the target host. class Host(InterpreterObject): def __init__(self): InterpreterObject.__init__(self) self.methods.update({'pointer_size' : self.get_ptrsize_method, 'name' : self.get_name_method, 'is_big_endian' : self.is_big_endian_method, }) def get_ptrsize_method(self, args, kwargs): if sys.maxsize > 2**32: return 64 return 32 def get_name_method(self, args, kwargs): return platform.system().lower() def is_big_endian_method(self, args, kwargs): return sys.byteorder != 'little' class IncludeDirs(InterpreterObject): def __init__(self, curdir, dirs, kwargs): InterpreterObject.__init__(self) self.curdir = curdir self.incdirs = dirs # Fixme: check that the directories actually exist. # Also that they don't contain ".." or somesuch. if len(kwargs) > 0: raise InvalidCode('Includedirs function does not take keyword arguments.') def get_curdir(self): return self.curdir def get_incdirs(self): return self.incdirs class Headers(InterpreterObject): def __init__(self, sources, kwargs): InterpreterObject.__init__(self) self.sources = sources self.subdir = kwargs.get('subdir', '') def set_subdir(self, subdir): self.subdir = subdir def get_subdir(self): return self.subdir def get_sources(self): return self.sources class Data(InterpreterObject): def __init__(self, subdir, sources, kwargs): InterpreterObject.__init__(self) self.subdir = subdir self.sources = sources kwsource = kwargs.get('sources', []) if not isinstance(kwsource, list): kwsource = [kwsource] self.sources += kwsource def get_subdir(self): return self.subdir def get_sources(self): return self.sources class ConfigureFile(InterpreterObject): def __init__(self, subdir, sourcename, targetname, kwargs): InterpreterObject.__init__(self) self.subdir = subdir self.sourcename = sourcename self.targetname = targetname def get_sources(self): return self.sources def get_subdir(self): return self.subdir def get_source_name(self): return self.sourcename def get_target_name(self): return self.targetname class Man(InterpreterObject): def __init__(self, sources, kwargs): InterpreterObject.__init__(self) self.sources = sources self.validate_sources() if len(kwargs) > 0: raise InvalidArguments('Man function takes no keyword arguments.') def validate_sources(self): for s in self.sources: num = int(s.split('.')[-1]) if num < 1 or num > 8: raise InvalidArguments('Man file must have a file extension of a number between 1 and 8') def get_sources(self): return self.sources class BuildTarget(InterpreterObject): def __init__(self, name, subdir, sources, kwargs): InterpreterObject.__init__(self) self.name = name self.subdir = subdir self.sources = [] self.external_deps = [] self.include_dirs = [] self.link_targets = [] self.filename = 'no_name' self.need_install = False self.pch = [] self.extra_args = {} self.generated = [] self.process_sourcelist(sources) self.process_kwargs(kwargs) if len(self.sources) == 0 and len(self.generated) == 0: raise InvalidArguments('Build target %s has no sources.' % name) def process_sourcelist(self, sources): if not isinstance(sources, list): sources = [sources] for s in sources: if isinstance(s, str): self.sources.append(s) elif isinstance(s, GeneratedList): self.generated.append(s) else: raise InvalidArguments('Bad source in target %s.' % self.name) def get_original_kwargs(self): return self.kwargs def process_kwargs(self, kwargs): self.kwargs = copy.copy(kwargs) kwargs.get('modules', []) self.need_install = kwargs.get('install', self.need_install) llist = kwargs.get('link_with', []) if not isinstance(llist, list): llist = [llist] for linktarget in llist: self.link(linktarget) pchlist = kwargs.get('pch', []) if not isinstance(pchlist, list): pchlist = [pchlist] self.add_pch(pchlist) clist = kwargs.get('c_args', []) if not isinstance(clist, list): clist = [clist] self.add_compiler_args('c', clist) cxxlist = kwargs.get('cxx_args', []) if not isinstance(cxxlist, list): cxxlist = [cxxlist] self.add_compiler_args('cxx', cxxlist) if 'version' in kwargs: self.set_version(kwargs['version']) if 'soversion' in kwargs: self.set_soversion(kwargs['soversion']) inclist = kwargs.get('include_dirs', []) if not isinstance(inclist, list): inclist = [inclist] self.add_include_dirs(inclist) deplist = kwargs.get('deps', []) if not isinstance(deplist, list): deplist = [deplist] self.add_external_deps(deplist) def get_subdir(self): return self.subdir def get_filename(self): return self.filename def get_extra_args(self, language): return self.extra_args.get(language, []) def get_dependencies(self): return self.link_targets def get_basename(self): return self.name def get_source_subdir(self): return self.subdir def get_sources(self): return self.sources def get_generated_sources(self): return self.generated def should_install(self): return self.need_install def has_pch(self): return len(self.pch) > 0 def get_pch(self): return self.pch def get_include_dirs(self): return self.include_dirs def add_external_deps(self, deps): for dep in deps: if not isinstance(dep, dependencies.Dependency) and\ not isinstance(dep, ExternalLibraryHolder): raise InvalidArguments('Argument is not an external dependency') self.external_deps.append(dep) if isinstance(dep, dependencies.Dependency): self.process_sourcelist(dep.get_sources()) def get_external_deps(self): return self.external_deps def add_dep(self, args): [self.add_external_dep(dep) for dep in args] def link(self, target): if not isinstance(target, StaticLibrary) and \ not isinstance(target, SharedLibrary): raise InvalidArguments('Link target is not library.') self.link_targets.append(target) def set_generated(self, genlist): for g in genlist: if not(isinstance(g, GeneratedList)): raise InvalidArguments('Generated source argument is not the output of a generator.') self.generated.append(g) def add_pch(self, pchlist): for a in pchlist: self.pch.append(a) def add_include_dirs(self, args): for a in args: if not isinstance(a, IncludeDirs): raise InvalidArguments('Include directory to be added is not an include directory object.') self.include_dirs += args def add_compiler_args(self, language, flags): for a in flags: if not isinstance(a, str): raise InvalidArguments('A non-string passed to compiler args.') if language in self.extra_args: self.extra_args[language] += flags else: self.extra_args[language] = flags def get_aliaslist(self): return [] class Executable(BuildTarget): def __init__(self, name, subdir, sources, environment, kwargs): BuildTarget.__init__(self, name, subdir, sources, kwargs) suffix = environment.get_exe_suffix() if suffix != '': self.filename = self.name + '.' + suffix else: self.filename = self.name class StaticLibrary(BuildTarget): def __init__(self, name, subdir, sources, environment, kwargs): BuildTarget.__init__(self, name, subdir, sources, kwargs) prefix = environment.get_static_lib_prefix() suffix = environment.get_static_lib_suffix() self.filename = prefix + self.name + '.' + suffix class SharedLibrary(BuildTarget): def __init__(self, name, subdir, sources, environment, kwargs): self.version = None self.soversion = None BuildTarget.__init__(self, name, subdir, sources, kwargs) self.prefix = environment.get_shared_lib_prefix() self.suffix = environment.get_shared_lib_suffix() def get_shbase(self): return self.prefix + self.name + '.' + self.suffix def get_filename(self): fname = self.get_shbase() if self.version is None: return fname else: return fname + '.' + self.version def set_version(self, version): if not isinstance(version, str): raise InvalidArguments('Shared library version is not a string.') self.version = version def set_soversion(self, version): if not isinstance(version, str): raise InvalidArguments('Shared library soversion is not a string.') self.soversion = version def get_aliaslist(self): aliases = [] if self.soversion is not None: aliases.append(self.get_shbase() + '.' + self.soversion) if self.version is not None: aliases.append(self.get_shbase()) return aliases class Test(InterpreterObject): def __init__(self, name, exe): InterpreterObject.__init__(self) self.name = name self.exe = exe def get_exe(self): return self.exe def get_name(self): return self.name class Interpreter(): def __init__(self, build): self.build = build code = open(os.path.join(build.environment.get_source_dir(),\ environment.build_filename)).read() if len(code.strip()) == 0: raise InvalidCode('Builder file is empty.') assert(isinstance(code, str)) self.ast = mparser.build_ast(code) self.sanity_check_ast() self.variables = {} self.builtin = {} self.builtin['host'] = Host() self.environment = build.environment self.build_func_dict() self.build_def_files = [environment.build_filename] self.subdir = '' self.generators = [] self.coredata = self.environment.get_coredata() self.visited_subdirs = {} def build_func_dict(self): self.funcs = {'project' : self.func_project, 'message' : self.func_message, 'executable': self.func_executable, 'find_dep' : self.func_find_dep, 'static_library' : self.func_static_lib, 'shared_library' : self.func_shared_lib, 'generator' : self.func_generator, 'add_test' : self.func_add_test, 'headers' : self.func_headers, 'man' : self.func_man, 'subdir' : self.func_subdir, 'data' : self.func_data, 'configure_file' : self.func_configure_file, 'include_directories' : self.func_include_directories, 'add_global_arguments' : self.func_add_global_arguments, 'find_program' : self.func_find_program, 'find_library' : self.func_find_library, } def get_build_def_files(self): return self.build_def_files def get_variables(self): return self.variables def sanity_check_ast(self): if not isinstance(self.ast, nodes.CodeBlock): raise InvalidCode('AST is of invalid type. Possibly a bug in the parser.') if len(self.ast.get_statements()) == 0: raise InvalidCode('No statements in code.') first = self.ast.get_statements()[0] if not isinstance(first, nodes.FunctionCall) or first.get_function_name() != 'project': raise InvalidCode('First statement must be a call to project') def run(self): self.evaluate_codeblock(self.ast) def evaluate_codeblock(self, node): if node is None: return if not isinstance(node, nodes.CodeBlock): raise InvalidCode('Line %d: Tried to execute a non-codeblock. Possibly a bug in the parser.' % node.lineno()) statements = node.get_statements() i = 0 while i < len(statements): cur = statements[i] self.evaluate_statement(cur) i += 1 # In THE FUTURE jump over blocks and stuff. def get_variable(self, varname): if varname in self.builtin: return self.builtin[varname] if varname in self.variables: return self.variables[varname] raise InvalidCode('Unknown variable "%s".' % varname) def set_variable(self, varname, variable): if varname in self.builtin: raise InvalidCode('Tried to overwrite internal variable "%s"' % varname) self.variables[varname] = variable def evaluate_statement(self, cur): if isinstance(cur, nodes.FunctionCall): return self.function_call(cur) elif isinstance(cur, nodes.Assignment): return self.assignment(cur) elif isinstance(cur, nodes.MethodCall): return self.method_call(cur) elif isinstance(cur, nodes.StringStatement): return cur elif isinstance(cur, nodes.BoolStatement): return cur elif isinstance(cur, nodes.IfStatement): return self.evaluate_if(cur) elif isinstance(cur, nodes.AtomStatement): return self.get_variable(cur.get_value()) elif isinstance(cur, nodes.Comparison): return self.evaluate_comparison(cur) elif isinstance(cur, nodes.ArrayStatement): return self.evaluate_arraystatement(cur) elif isinstance(cur, nodes.IntStatement): return cur else: raise InvalidCode("Line %d: Unknown statement." % cur.lineno()) def validate_arguments(self, args, argcount, arg_types): if argcount is not None: if argcount != len(args): raise InvalidArguments('Expected %d arguments, got %d', argcount, len(args)) for i in range(min(len(args), len(arg_types))): wanted = arg_types[i] actual = args[i] if wanted != None: if not isinstance(actual, wanted): print(actual) print(wanted) raise InvalidArguments('Incorrect argument type.') def func_project(self, node, args, kwargs): if len(args)< 2: raise InvalidArguments('Not enough arguments to project(). Needs at least the project name and one language') if len(kwargs) > 0: raise InvalidArguments('Project() does not take keyword arguments.') for a in args: if not isinstance(a, str): raise InvalidArguments('Line %d: Argument %s is not a string.' % (node.lineno(), str(a))) if self.build.project is not None: raise InvalidCode('Second call to project() on line %d.' % node.lineno()) self.build.project = args[0] print('Project name is "%s".' % self.build.project) self.add_languages(node, args[1:]) def func_message(self, node, args): self.validate_arguments(args, 1, [str]) print('Message: %s' % args[0]) def add_languages(self, node, args): for lang in args: if lang in self.coredata.compilers: comp = self.coredata.compilers[lang] else: if lang.lower() == 'c': comp = self.environment.detect_c_compiler() elif lang.lower() == 'cxx': comp = self.environment.detect_cxx_compiler() elif lang.lower() == 'objc': comp = self.environment.detect_objc_compiler() elif lang.lower() == 'objcxx': comp = self.environment.detect_objcxx_compiler() else: raise InvalidCode('Tried to use unknown language "%s".' % lang) comp.sanity_check(self.environment.get_scratch_dir()) self.coredata.compilers[lang] = comp self.build.compilers.append(comp) def func_find_program(self, node, args, kwargs): self.validate_arguments(args, 1, [str]) required = kwargs.get('required', False) if not isinstance(required, bool): raise InvalidArguments('Line %d: "required" argument must be a boolean.' % node.lineno()) exename = args[0] if exename in self.coredata.ext_progs and\ self.coredata.ext_progs[exename].found(): return ExternalProgramHolder(self.coredata.ext_progs[exename]) extprog = dependencies.ExternalProgram(exename) progobj = ExternalProgramHolder(extprog) self.coredata.ext_progs[exename] = extprog if required and not progobj.found(): raise InvalidArguments('Line %d: program "%s" not found.' % (node.lineno(), exename)) return progobj def func_find_library(self, node, args, kwargs): self.validate_arguments(args, 1, [str]) required = kwargs.get('required', False) if not isinstance(required, bool): raise InvalidArguments('Line %d: "required" argument must be a boolean.' % node.lineno()) libname = args[0] if libname in self.coredata.ext_libs and\ self.coredata.ext_libs[libname].found(): return ExternalLibraryHolder(self.coredata.ext_libs[libname]) result = self.environment.find_library(libname) extlib = dependencies.ExternalLibrary(libname, result) libobj = ExternalLibraryHolder(extlib) self.coredata.ext_libs[libname] = extlib if required and not libobj.found(): raise InvalidArguments('Line %d: external library "%s" not found.' % (node.lineno(), libname)) return libobj def func_find_dep(self, node, args, kwargs): self.validate_arguments(args, 1, [str]) name = args[0] identifier = dependencies.get_dep_identifier(name, kwargs) if identifier in self.coredata.deps: dep = self.coredata.deps[identifier] else: dep = dependencies.Dependency() # Returns always false for dep.found() if not dep.found(): dep = dependencies.find_external_dependency(name, kwargs) self.coredata.deps[identifier] = dep return dep def func_executable(self, node, args, kwargs): return self.build_target(node, args, kwargs, Executable) def func_static_lib(self, node, args, kwargs): return self.build_target(node, args, kwargs, StaticLibrary) def func_shared_lib(self, node, args, kwargs): return self.build_target(node, args, kwargs, SharedLibrary) def func_generator(self, node, args, kwargs): gen = Generator(args, kwargs) self.generators.append(gen) return gen def func_add_test(self, node, args, kwargs): self.validate_arguments(args, 2, [str, Executable]) t = Test(args[0], args[1]) self.build.tests.append(t) print('Adding test "%s"' % args[0]) def func_headers(self, node, args, kwargs): for a in args: if not isinstance(a, str): raise InvalidArguments('Line %d: Argument %s is not a string.' % (node.lineno(), str(a))) h = Headers(args, kwargs) self.build.headers.append(h) return h def func_man(self, node, args, kwargs): for a in args: if not isinstance(a, str): raise InvalidArguments('Line %d: Argument %s is not a string.' % (node.lineno(), str(a))) m = Man(args, kwargs) self.build.man.append(m) return m def func_subdir(self, node, args, kwargs): if len(kwargs) > 0: raise InvalidArguments('Line %d: subdir command takes no keyword arguments.' % node.lineno()) self.validate_arguments(args, 1, [str]) prev_subdir = self.subdir subdir = os.path.join(prev_subdir, args[0]) if subdir in self.visited_subdirs: raise InvalidArguments('Line %d: tried to enter directory "%s", which has already been visited.'\ % (node.lineno(), subdir)) self.visited_subdirs[subdir] = True self.subdir = subdir buildfilename = os.path.join(self.subdir, environment.build_filename) self.build_def_files.append(buildfilename) code = open(os.path.join(self.environment.get_source_dir(), buildfilename)).read() assert(isinstance(code, str)) codeblock = mparser.build_ast(code) print('Going to subdirectory "%s".' % self.subdir) self.evaluate_codeblock(codeblock) self.subdir = prev_subdir def func_data(self, node, args, kwargs): if len(args ) < 1: raise InvalidArguments('Line %d: Data function must have at least one argument: the subdirectory.' % node.lineno()) for a in args: if not isinstance(a, str): raise InvalidArguments('Line %d: Argument %s is not a string.' % (node.lineno(), str(a))) data = Data(args[0], args[1:], kwargs) self.build.data.append(data) return data def func_configure_file(self, node, args, kwargs): self.validate_arguments(args, 2, [str, str]) conffile = os.path.join(self.subdir, args[0]) self.build_def_files.append(conffile) c = ConfigureFile(self.subdir, args[0], args[1], kwargs) self.build.configure_files.append(c) def func_include_directories(self, node, args, kwargs): for a in args: if not isinstance(a, str): raise InvalidArguments('Line %d: Argument %s is not a string.' % (node.lineno(), str(a))) i = IncludeDirs(self.subdir, args, kwargs) return i def func_add_global_arguments(self, node, args, kwargs): for a in args: if not isinstance(a, str): raise InvalidArguments('Line %d: Argument %s is not a string.' % (node.lineno(), str(a))) if len(self.build.get_targets()) > 0: raise InvalidCode('Line %d: global flags can not be set once any build target is defined.' % node.lineno()) if not 'language' in kwargs: raise InvalidCode('Line %d: missing language definition in add_global_arguments' % node.lineno()) lang = kwargs['language'].lower() if lang in self.build.global_args: self.build.global_args[lang] += args else: self.build.global_args[lang] = args def flatten(self, args): if isinstance(args, nodes.StringStatement): return args.get_value() result = [] for a in args: if isinstance(a, list): result = result + self.flatten(a) if isinstance(a, nodes.StringStatement): result.append(a.get_value()) else: result.append(a) return result def build_target(self, node, args, kwargs, targetclass): args = self.flatten(args) name = args[0] sources = args[1:] if name in coredata.forbidden_target_names: raise InvalidArguments('Line %d: target name "%s" is reserved for Meson\'s internal use. Please rename.'\ % (node.lineno(), name)) try: kw_src = self.flatten(kwargs['sources']) if not isinstance(kw_src, list): kw_src = [kw_src] except KeyError: kw_src = [] sources += kw_src if name in self.build.targets: raise InvalidCode('Line %d: tried to create target "%s", but a target of that name already exists.' % (node.lineno(), name)) l = targetclass(name, self.subdir, sources, self.environment, kwargs) self.build.targets[name] = l print('Creating build target "%s" with %d files.' % (name, len(sources))) return l def function_call(self, node): func_name = node.get_function_name() (posargs, kwargs) = self.reduce_arguments(node.arguments) if func_name in self.funcs: return self.funcs[func_name](node, posargs, kwargs) else: raise InvalidCode('Unknown function "%s".' % func_name) def is_assignable(self, value): if isinstance(value, InterpreterObject) or \ isinstance(value, dependencies.Dependency) or\ isinstance(value, nodes.StringStatement) or\ isinstance(value, nodes.BoolStatement) or\ isinstance(value, nodes.IntStatement) or\ isinstance(value, list): return True return False def assignment(self, node): var_name = node.var_name if not isinstance(var_name, nodes.AtomExpression): raise InvalidArguments('Line %d: Tried to assign value to a non-variable.' % node.lineno()) var_name = var_name.get_value() value = self.evaluate_statement(node.value) if value is None: raise InvalidCode('Line %d: Can not assign None to variable.' % node.lineno()) if not self.is_assignable(value): raise InvalidCode('Line %d: Tried to assign an invalid value to variable.' % node.lineno()) self.set_variable(var_name, value) return value def reduce_single(self, arg): if isinstance(arg, nodes.AtomExpression) or isinstance(arg, nodes.AtomStatement): return self.get_variable(arg.value) elif isinstance(arg, str): return arg elif isinstance(arg, nodes.StringExpression) or isinstance(arg, nodes.StringStatement): return arg.get_value() elif isinstance(arg, nodes.FunctionCall): return self.function_call(arg) elif isinstance(arg, nodes.MethodCall): return self.method_call(arg) elif isinstance(arg, nodes.BoolStatement) or isinstance(arg, nodes.BoolExpression): return arg.get_value() elif isinstance(arg, nodes.ArrayStatement): return [self.reduce_single(curarg) for curarg in arg.args.arguments] elif isinstance(arg, nodes.IntStatement): return arg.get_value() else: raise InvalidCode('Line %d: Irreducible argument.' % arg.lineno()) def reduce_arguments(self, args): assert(isinstance(args, nodes.Arguments)) if args.incorrect_order(): raise InvalidArguments('Line %d: all keyword arguments must be after positional arguments.' % args.lineno()) reduced_pos = [self.reduce_single(arg) for arg in args.arguments] reduced_kw = {} for key in args.kwargs.keys(): if not isinstance(key, str): raise InvalidArguments('Line %d: keyword argument name is not a string.' % args.lineno()) a = args.kwargs[key] reduced_kw[key] = self.reduce_single(a) return (reduced_pos, reduced_kw) def method_call(self, node): object_name = node.object_name.get_value() method_name = node.method_name.get_value() args = node.arguments obj = self.get_variable(object_name) if not isinstance(obj, InterpreterObject): raise InvalidArguments('Line %d: variable "%s" is not callable.' % (node.lineno(), object_name)) (args, kwargs) = self.reduce_arguments(args) return obj.method_call(method_name, args, kwargs) def evaluate_if(self, node): result = self.evaluate_statement(node.get_clause()) cond = None if isinstance(result, nodes.BoolExpression) or \ isinstance(result, nodes.BoolStatement): cond = result.get_value() if isinstance(result, bool): cond = result if cond is not None: if cond: self.evaluate_codeblock(node.get_trueblock()) else: self.evaluate_codeblock(node.get_falseblock()) else: print(node.get_clause()) print(result) raise InvalidCode('Line %d: If clause does not evaluate to true or false.' % node.lineno()) def is_elementary_type(self, v): if isinstance(v, int) or isinstance(v, str) or isinstance(v, bool): return True return False def evaluate_comparison(self, node): v1 = self.evaluate_statement(node.get_first()) v2 = self.evaluate_statement(node.get_second()) if self.is_elementary_type(v1): val1 = v1 else: val1 = v1.get_value() if self.is_elementary_type(v2): val2 = v2 else: val2 = v2.get_value() assert(type(val1) == type(val2)) if node.get_ctype() == '==': return val1 == val2 elif node.get_ctype() == '!=': return val1 != val2 else: raise InvalidCode('You broke me.') def evaluate_arraystatement(self, cur): (arguments, kwargs) = self.reduce_arguments(cur.get_args()) if len(kwargs) > 0: raise InvalidCode('Line %d: Keyword arguments are invalid in array construction.' % cur.lineno()) return arguments if __name__ == '__main__': code = """project('myawesomeproject') message('I can haz text printed out?') language('c') prog = executable('prog', 'prog.c', 'subfile.c') dep = find_dep('gtk+-3.0') prog.add_dep(dep) """ i = Interpreter(code, environment.Environment('.', 'work area')) i.run()