#!/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 bparser import nodes import environment import os, sys, platform class InterpreterException(Exception): pass class InvalidCode(InterpreterException): pass class InvalidArguments(InterpreterException): pass class InterpreterObject(): def __init__(self): self.methods = {} def method_call(self, method_name, args): if method_name in self.methods: return self.methods[method_name](args) raise InvalidCode('Unknown method "%s" in object.' % method_name) # 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): if sys.maxsize > 2**32: return 64 return 32 def get_name_method(self, args): return platform.system().lower() def is_big_endian_method(self, args): return sys.byteorder != 'little' class IncludeDirs(InterpreterObject): def __init__(self, curdir, dirs): InterpreterObject.__init__(self) self.curdir = curdir self.incdirs = dirs # Fixme: check that the directories actually exist. # Also that they don't contain ".." or somesuch. def get_curdir(self): return self.curdir def get_incdirs(self): return self.incdirs class Headers(InterpreterObject): def __init__(self, sources): InterpreterObject.__init__(self) self.sources = sources self.methods.update({'set_subdir' : self.set_subdir}) self.subdir = '' def set_subdir(self, args): self.subdir = args[0] def get_subdir(self): return self.subdir def get_sources(self): return self.sources class Data(InterpreterObject): def __init__(self, subdir, sources): InterpreterObject.__init__(self) self.subdir = subdir self.sources = sources def get_subdir(self): return self.subdir def get_sources(self): return self.sources class ConfigureFile(InterpreterObject): def __init__(self, subdir, sourcename, targetname): 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): InterpreterObject.__init__(self) self.sources = sources self.validate_sources() 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): InterpreterObject.__init__(self) self.name = name self.subdir = subdir self.sources = sources self.external_deps = [] self.include_dirs = [] self.methods.update({'add_dep': self.add_dep_method, 'link' : self.link_method, 'install': self.install_method, 'pch' : self.pch_method, 'add_include_dirs': self.add_include_dirs_method, 'add_compiler_args' : self.add_compiler_args_method, }) self.link_targets = [] self.filename = 'no_name' self.need_install = False self.pch = [] self.extra_args = {} 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 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_dep(self, dep): if not isinstance(dep, environment.PkgConfigDependency): raise InvalidArguments('Argument is not an external dependency') self.external_deps.append(dep) def get_external_deps(self): return self.external_deps def add_dep_method(self, args): [self.add_external_dep(dep) for dep in args] def link_method(self, args): target = args[0] if not isinstance(target, StaticLibrary) and \ not isinstance(target, SharedLibrary): raise InvalidArguments('Link target is not library.') self.link_targets.append(target) def install_method(self, args): if len(args) != 0: raise InvalidArguments('Install() takes no arguments.') self.need_install = True def pch_method(self, args): if len(args) == 0: raise InvalidArguments('Pch requires arguments.') for a in args: self.pch.append(a) def add_include_dirs_method(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_method(self, args): for a in args: if not isinstance(a, str): raise InvalidArguments('A non-string passed to compiler args.') language = args[0] flags = args[1:] 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): BuildTarget.__init__(self, name, subdir, sources) 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): BuildTarget.__init__(self, name, subdir, sources) 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): BuildTarget.__init__(self, name, subdir, sources) self.version = None self.soversion = None self.prefix = environment.get_shared_lib_prefix() self.suffix = environment.get_shared_lib_suffix() self.methods.update({'set_version' : self.set_version_method, 'set_soversion' : self.set_soversion_method, }) 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_method(self, args): v = args[0] if not isinstance(v, str): raise InvalidArguments('Shared library version is not a string.') self.version = v def set_soversion_method(self, args): v = args[0] if not isinstance(v, str): raise InvalidArguments('Shared library soversion is not a string.') self.soversion = v 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, code, build): self.build = build self.ast = bparser.build_ast(code) self.sanity_check_ast() self.variables = {} self.builtin = {} self.builtin['host'] = Host() self.environment = build.environment self.build_func_dict() self.subdir = '' 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, '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, } 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('Line %d: 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): raise InvalidArguments('Incorrect argument type.') def func_project(self, node, args): if len(args) < 2: raise InvalidArguments('Not enough arguments to project(). Needs at least the project name and one language') 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.lower() == 'c': comp = self.environment.detect_c_compiler() elif lang.lower() == 'cxx': comp = self.environment.detect_cxx_compiler() else: raise InvalidCode('Tried to use unknown language "%s".' % lang) comp.sanity_check(self.environment.get_scratch_dir()) self.build.compilers.append(comp) def func_find_dep(self, node, args): self.validate_arguments(args, 1, [str]) name = args[0] dep = environment.find_external_dependency(name) return dep def func_executable(self, node, args): return self.build_target(node, args, Executable) def func_static_lib(self, node, args): return self.build_target(node, args, StaticLibrary) def func_shared_lib(self, node, args): return self.build_target(node, args, SharedLibrary) def func_add_test(self, node, args): 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): 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) self.build.headers.append(h) return h def func_man(self, node, args): 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) self.build.man.append(m) return m def func_subdir(self, node, args): self.validate_arguments(args, 1, [str]) prev_subdir = self.subdir self.subdir = os.path.join(prev_subdir, args[0]) buildfilename = os.path.join(self.subdir, environment.builder_filename) code = open(os.path.join(self.environment.get_source_dir(), buildfilename)).read() assert(isinstance(code, str)) codeblock = bparser.build_ast(code) print('Going to subdirectory "%s".' % self.subdir) self.evaluate_codeblock(codeblock) self.subdir = prev_subdir def func_data(self, node, args): if len(args ) < 2: raise InvalidArguments('Line %d: Data function must have at least two arguments: name and source file(s)' % 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:]) self.build.data.append(data) return data def func_configure_file(self, node, args): self.validate_arguments(args, 2, [str, str]) c = ConfigureFile(self.subdir, args[0], args[1]) self.build.configure_files.append(c) def func_include_directories(self, node, args): 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) return i def func_add_global_arguments(self, node, args): 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()) lang = args[0].lower() switches = args[1:] if lang in self.build.global_args: self.build.global_args[lang] += switches else: self.build.global_args[lang] = switches def flatten(self, args): result = [] for a in args: if isinstance(a, list): result = result + self.flatten(a) else: result.append(a) return result def build_target(self, node, args, targetclass): args = self.flatten(args) for a in args: if not isinstance(a, str): raise InvalidArguments('Line %d: Argument %s is not a string.' % (node.lineno(), str(a))) name = args[0] sources = [] for s in args[1:]: if not self.environment.is_header(s): sources.append(s) if len(sources) == 0: raise InvalidArguments('Line %d: target has no source files.' % node.lineno()) 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) 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() args = self.reduce_arguments(node.arguments) if func_name in self.funcs: return self.funcs[func_name](node, args) else: raise InvalidCode('Unknown function "%s".' % func_name) def is_assignable(self, value): if isinstance(value, InterpreterObject) or \ isinstance(value, environment.PkgConfigDependency) 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_arguments(self, args): assert(isinstance(args, nodes.Arguments)) reduced = [] for arg in args.arguments: if isinstance(arg, nodes.AtomExpression) or isinstance(arg, nodes.AtomStatement): r = self.get_variable(arg.value) elif isinstance(arg, nodes.StringExpression) or isinstance(arg, nodes.StringStatement): r = arg.get_value() elif isinstance(arg, nodes.FunctionCall): r = self.function_call(arg) elif isinstance(arg, nodes.MethodCall): r = self.method_call(arg) else: raise InvalidCode('Line %d: Irreducible argument.' % args.lineno()) reduced.append(r) assert(len(reduced) == len(args)) return reduced 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)) return obj.method_call(method_name, self.reduce_arguments(args)) 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 evaluate_comparison(self, node): v1 = self.evaluate_statement(node.get_first()) v2 = self.evaluate_statement(node.get_second()) if isinstance(v1, int): val1 = v1 else: val1 = v1.get_value() if(isinstance(v2, int)): 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 = self.reduce_arguments(cur.get_args()) 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()