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#!/usr/bin/python3
# Copyright 2014 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 sys, os
import re
class Token:
def __init__(self, tid, value):
self.tid = tid
self.value = value
self.lineno = 0
self.colno = 0
class Statement():
def __init__(self, name, args):
self.name = name
self.args = args
class Lexer:
def __init__(self):
self.token_specification = [
# Need to be sorted longest to shortest.
('ignore', re.compile(r'[ \t]')),
('string', re.compile(r'"([^\\]|(\\.))*?"', re.M)),
('id', re.compile('''[,-><${}=+_0-9a-z/A-Z@.*]+''')),
('eol', re.compile(r'\n')),
('comment', re.compile(r'\#.*')),
('lparen', re.compile(r'\(')),
('rparen', re.compile(r'\)')),
('varexp', re.compile(r'\${[-_0-9a-z/A-Z.]+}')),
]
def lex(self, code):
lineno = 1
line_start = 0
loc = 0;
col = 0
while(loc < len(code)):
matched = False
for (tid, reg) in self.token_specification:
mo = reg.match(code, loc)
if mo:
col = mo.start()-line_start
matched = True
loc = mo.end()
match_text = mo.group()
if tid == 'ignore':
continue
if tid == 'comment':
yield(Token('comment', match_text))
elif tid == 'lparen':
yield(Token('lparen', '('))
elif tid == 'rparen':
yield(Token('rparen', ')'))
elif tid == 'string':
yield(Token('string', match_text[1:-1]))
elif tid == 'id':
yield(Token('id', match_text))
elif tid == 'eol':
#yield('eol')
lineno += 1
col = 1
line_start = mo.end()
pass
elif tid == 'varexp':
yield(Token('varexp', match_text[2:-1]))
else:
raise RuntimeError('Wharrgarbl')
break
if not matched:
raise RuntimeError('Lexer got confused line %d column %d' % (lineno, col))
class Parser():
def __init__(self, code):
self.stream = Lexer().lex(code)
self.getsym()
def getsym(self):
try:
self.current = next(self.stream)
except StopIteration:
self.current = Token('eof', '')
def accept(self, s):
if self.current.tid == s:
self.getsym()
return True
return False
def expect(self, s):
if self.accept(s):
return True
raise RuntimeError('Expecting %s got %s.' % (s, self.current.tid), self.current.lineno, self.current.colno)
def statement(self):
cur = self.current
if self.accept('comment'):
return Statement('_', [cur.value])
self.accept('id')
self.expect('lparen')
args = self.arguments()
self.expect('rparen')
return Statement(cur.value, args)
def arguments(self):
args = []
if self.accept('lparen'):
args.append(self.arguments())
self.expect('rparen')
arg = self.current
if self.accept('string') or self.accept('varexp') or\
self.accept('id'):
args.append(arg)
rest = self.arguments()
args += rest
return args
def parse(self):
while not self.accept('eof'):
yield(self.statement())
class Converter:
def __init__(self, cmake_root):
self.cmake_root = cmake_root
self.indent_unit = ' '
self.indent_level = 0
def write_entry(self, outfile, t):
indent = self.indent_level*self.indent_unit
if t.name == '_':
line = t.args[0]
elif t.name == 'add_subdirectory':
line = 'subdir(' + t.args[0].value + ')'
elif t.name == 'pkg_search_module' or t.name == 'pkg_search_modules':
varname = t.args[0].value.lower()
mods = ['dependency(%s)' % i.value for i in t.args[1:]]
if len(mods) == 1:
line = '%s = %s' % (varname, mods[0])
else:
line = '%s = [%s]' % (varname, ', '.join(mods))
else:
line = '''# %s''' % t.name
outfile.write(indent)
outfile.write(line)
if not(line.endswith('\n')):
outfile.write('\n')
def convert(self, subdir=''):
if subdir == '':
subdir = self.cmake_root
cfile = os.path.join(subdir, 'CMakeLists.txt')
try:
cmakecode = open(cfile).read()
except FileNotFoundError:
print('\nWarning: No CMakeLists.txt in', subdir, '\n')
return
p = Parser(cmakecode)
outfile = open(os.path.join(subdir, 'meson.build'), 'w')
for t in p.parse():
if t.name == 'add_subdirectory':
#print('\nRecursing to subdir', os.path.join(self.cmake_root, t.args[0].value), '\n')
self.convert(os.path.join(subdir, t.args[0].value))
#print('\nReturning to', self.cmake_root, '\n')
self.write_entry(outfile, t)
if __name__ == '__main__':
if len(sys.argv) != 2:
print(sys.argv[0], '<CMake project root>')
sys.exit(1)
c = Converter(sys.argv[1])
c.convert()
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