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#!/usr/bin/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 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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('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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('string', re.compile('"[^"]*?"')),
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('varexp', re.compile(r'\${[-_0-9a-z/A-Z.]+}')),
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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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value = None
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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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curline = lineno
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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' or tid == 'comment':
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pass
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elif tid == 'lparen':
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yield('lparen')
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elif tid == 'rparen':
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yield('rparen')
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elif tid == 'string':
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yield('String: ' + match_text[1:-1])
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elif tid == 'id':
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yield('Id: ' + match_text)
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elif tid == 'eol':
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yield('eol')
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elif tid == 'varexp':
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yield('Variable:' + 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 %d %d' % (lineno, col))
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def convert(cmake_root):
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cfile = os.path.join(cmake_root, 'CMakeLists.txt')
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cmakecode = open(cfile).read()
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l = Lexer()
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for t in l.lex(cmakecode):
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print(t)
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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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convert(sys.argv[1])
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