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303 lines
11 KiB
303 lines
11 KiB
#!/usr/bin/env python3 |
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# Copyright 2014 Jussi Pakkanen |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import sys, os |
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import re |
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class Token: |
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def __init__(self, tid, value): |
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self.tid = tid |
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self.value = value |
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self.lineno = 0 |
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self.colno = 0 |
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class Statement(): |
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def __init__(self, name, args): |
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self.name = name |
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self.args = args |
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class Lexer: |
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def __init__(self): |
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self.token_specification = [ |
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# Need to be sorted longest to shortest. |
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('ignore', re.compile(r'[ \t]')), |
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('string', re.compile(r'"([^\\]|(\\.))*?"', re.M)), |
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('varexp', re.compile(r'\${[-_0-9a-z/A-Z.]+}')), |
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('id', re.compile('''[,-><${}=+_0-9a-z/A-Z|@.*]+''')), |
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('eol', re.compile(r'\n')), |
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('comment', re.compile(r'#.*')), |
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('lparen', re.compile(r'\(')), |
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('rparen', re.compile(r'\)')), |
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] |
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def lex(self, code): |
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lineno = 1 |
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line_start = 0 |
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loc = 0 |
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col = 0 |
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while(loc < len(code)): |
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matched = False |
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for (tid, reg) in self.token_specification: |
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mo = reg.match(code, loc) |
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if mo: |
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col = mo.start() - line_start |
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matched = True |
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loc = mo.end() |
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match_text = mo.group() |
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if tid == 'ignore': |
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continue |
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if tid == 'comment': |
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yield(Token('comment', match_text)) |
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elif tid == 'lparen': |
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yield(Token('lparen', '(')) |
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elif tid == 'rparen': |
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yield(Token('rparen', ')')) |
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elif tid == 'string': |
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yield(Token('string', match_text[1:-1])) |
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elif tid == 'id': |
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yield(Token('id', match_text)) |
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elif tid == 'eol': |
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# yield('eol') |
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lineno += 1 |
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col = 1 |
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line_start = mo.end() |
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pass |
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elif tid == 'varexp': |
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yield(Token('varexp', match_text[2:-1])) |
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else: |
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raise RuntimeError('Wharrgarbl') |
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break |
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if not matched: |
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raise RuntimeError('Lexer got confused line %d column %d' % (lineno, col)) |
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class Parser(): |
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def __init__(self, code): |
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self.stream = Lexer().lex(code) |
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self.getsym() |
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def getsym(self): |
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try: |
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self.current = next(self.stream) |
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except StopIteration: |
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self.current = Token('eof', '') |
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def accept(self, s): |
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if self.current.tid == s: |
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self.getsym() |
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return True |
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return False |
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def expect(self, s): |
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if self.accept(s): |
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return True |
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raise RuntimeError('Expecting %s got %s.' % (s, self.current.tid), self.current.lineno, self.current.colno) |
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def statement(self): |
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cur = self.current |
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if self.accept('comment'): |
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return Statement('_', [cur.value]) |
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self.accept('id') |
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self.expect('lparen') |
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args = self.arguments() |
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self.expect('rparen') |
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return Statement(cur.value, args) |
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def arguments(self): |
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args = [] |
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if self.accept('lparen'): |
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args.append(self.arguments()) |
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self.expect('rparen') |
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arg = self.current |
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if self.accept('string') \ |
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or self.accept('varexp') \ |
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or self.accept('id'): |
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args.append(arg) |
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rest = self.arguments() |
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args += rest |
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return args |
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def parse(self): |
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while not self.accept('eof'): |
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yield(self.statement()) |
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class Converter: |
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ignored_funcs = {'cmake_minimum_required': True, |
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'enable_testing': True, |
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'include': True} |
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def __init__(self, cmake_root): |
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self.cmake_root = cmake_root |
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self.indent_unit = ' ' |
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self.indent_level = 0 |
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self.options = [] |
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def convert_args(self, args, as_array=True): |
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res = [] |
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if as_array: |
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start = '[' |
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end = ']' |
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else: |
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start = '' |
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end = '' |
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for i in args: |
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if i.tid == 'id': |
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res.append("'%s'" % i.value) |
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elif i.tid == 'varexp': |
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res.append('%s' % i.value) |
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elif i.tid == 'string': |
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res.append("'%s'" % i.value) |
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else: |
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print(i) |
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raise RuntimeError('Unknown arg type.') |
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if len(res) > 1: |
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return start + ', '.join(res) + end |
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if len(res) == 1: |
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return res[0] |
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return '' |
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def write_entry(self, outfile, t): |
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if t.name in Converter.ignored_funcs: |
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return |
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preincrement = 0 |
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postincrement = 0 |
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if t.name == '_': |
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line = t.args[0] |
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elif t.name == 'add_subdirectory': |
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line = "subdir('" + t.args[0].value + "')" |
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elif t.name == 'pkg_search_module' or t.name == 'pkg_search_modules': |
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varname = t.args[0].value.lower() |
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mods = ["dependency('%s')" % i.value for i in t.args[1:]] |
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if len(mods) == 1: |
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line = '%s = %s' % (varname, mods[0]) |
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else: |
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line = '%s = [%s]' % (varname, ', '.join(["'%s'" % i for i in mods])) |
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elif t.name == 'find_package': |
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line = "%s_dep = dependency('%s')" % (t.args[0].value, t.args[0].value) |
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elif t.name == 'find_library': |
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line = "%s = find_library('%s')" % (t.args[0].value.lower(), t.args[0].value) |
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elif t.name == 'add_executable': |
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line = '%s_exe = executable(%s)' % (t.args[0].value, self.convert_args(t.args, False)) |
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elif t.name == 'add_library': |
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if t.args[1].value == 'SHARED': |
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libcmd = 'shared_library' |
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args = [t.args[0]] + t.args[2:] |
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elif t.args[1].value == 'STATIC': |
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libcmd = 'static_library' |
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args = [t.args[0]] + t.args[2:] |
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else: |
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libcmd = 'static_library' |
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args = t.args |
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line = '%s_lib = %s(%s)' % (t.args[0].value, libcmd, self.convert_args(args, False)) |
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elif t.name == 'add_test': |
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line = 'test(%s)' % self.convert_args(t.args, False) |
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elif t.name == 'option': |
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optname = t.args[0].value |
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description = t.args[1].value |
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if len(t.args) > 2: |
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default = t.args[2].value |
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else: |
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default = None |
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self.options.append((optname, description, default)) |
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return |
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elif t.name == 'project': |
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pname = t.args[0].value |
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args = [pname] |
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for l in t.args[1:]: |
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l = l.value.lower() |
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if l == 'cxx': |
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l = 'cpp' |
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args.append(l) |
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args = ["'%s'" % i for i in args] |
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line = 'project(' + ', '.join(args) + ')' |
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elif t.name == 'set': |
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varname = t.args[0].value.lower() |
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line = '%s = %s\n' % (varname, self.convert_args(t.args[1:])) |
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elif t.name == 'if': |
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postincrement = 1 |
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line = 'if %s' % self.convert_args(t.args, False) |
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elif t.name == 'elseif': |
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preincrement = -1 |
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postincrement = 1 |
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line = 'elif %s' % self.convert_args(t.args, False) |
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elif t.name == 'else': |
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preincrement = -1 |
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postincrement = 1 |
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line = 'else' |
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elif t.name == 'endif': |
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preincrement = -1 |
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line = 'endif' |
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else: |
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line = '''# %s(%s)''' % (t.name, self.convert_args(t.args)) |
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self.indent_level += preincrement |
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indent = self.indent_level * self.indent_unit |
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outfile.write(indent) |
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outfile.write(line) |
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if not(line.endswith('\n')): |
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outfile.write('\n') |
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self.indent_level += postincrement |
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def convert(self, subdir=''): |
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if subdir == '': |
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subdir = self.cmake_root |
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cfile = os.path.join(subdir, 'CMakeLists.txt') |
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try: |
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with open(cfile) as f: |
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cmakecode = f.read() |
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except FileNotFoundError: |
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print('\nWarning: No CMakeLists.txt in', subdir, '\n') |
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return |
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p = Parser(cmakecode) |
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with open(os.path.join(subdir, 'meson.build'), 'w') as outfile: |
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for t in p.parse(): |
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if t.name == 'add_subdirectory': |
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# print('\nRecursing to subdir', |
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# os.path.join(self.cmake_root, t.args[0].value), |
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# '\n') |
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self.convert(os.path.join(subdir, t.args[0].value)) |
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# print('\nReturning to', self.cmake_root, '\n') |
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self.write_entry(outfile, t) |
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if subdir == self.cmake_root and len(self.options) > 0: |
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self.write_options() |
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def write_options(self): |
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filename = os.path.join(self.cmake_root, 'meson_options.txt') |
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with open(filename, 'w') as optfile: |
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for o in self.options: |
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(optname, description, default) = o |
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if default is None: |
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defaultstr = '' |
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else: |
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if default == 'OFF': |
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typestr = ' type : \'boolean\',' |
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default = 'false' |
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elif default == 'ON': |
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default = 'true' |
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typestr = ' type : \'boolean\',' |
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else: |
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typestr = ' type : \'string\',' |
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defaultstr = ' value : %s,' % default |
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line = "option(%r,%s%s description : '%s')\n" % (optname, |
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typestr, |
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defaultstr, |
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description) |
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optfile.write(line) |
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if __name__ == '__main__': |
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if len(sys.argv) != 2: |
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print(sys.argv[0], '<CMake project root>') |
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sys.exit(1) |
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c = Converter(sys.argv[1]) |
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c.convert()
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