annotate contrib/hgfixes/fix_bytesmod.py @ 14601:25c1f3ddd927

dispatch: propagate ui command options to the local ui (issue2523) so the ui object passed to pre/post python hooks has the verbose flag (and the rest) set correctly
author Idan Kamara <idankk86@gmail.com>
date Mon, 13 Jun 2011 00:19:26 +0300
parents e627fef94604
children 681f7b9213a4
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1 """Fixer that changes bytes % whatever to a function that actually formats
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2 it."""
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3
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4 from lib2to3 import fixer_base
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5 from lib2to3.fixer_util import is_tuple, Call, Comma, Name, touch_import
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6
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7 # XXX: Implementing a blacklist in 2to3 turned out to be more troublesome than
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8 # blacklisting some modules inside the fixers. So, this is what I came with.
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9
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10 blacklist = ['mercurial/demandimport.py',
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11 'mercurial/py3kcompat.py',
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12 'mercurial/i18n.py',
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13 ]
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14
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15 def isnumberremainder(formatstr, data):
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16 try:
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17 if data.value.isdigit():
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18 return True
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19 except AttributeError:
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20 return False
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21
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22 class FixBytesmod(fixer_base.BaseFix):
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23 # XXX: There's one case (I suppose) I can't handle: when a remainder
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24 # operation like foo % bar is performed, I can't really know what the
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25 # contents of foo and bar are. I believe the best approach is to "correct"
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26 # the to-be-converted code and let bytesformatter handle that case in
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27 # runtime.
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28 PATTERN = '''
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29 term< formatstr=STRING '%' data=STRING > |
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30 term< formatstr=STRING '%' data=atom > |
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31 term< formatstr=NAME '%' data=any > |
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32 term< formatstr=any '%' data=any >
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33 '''
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34
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35 def transform(self, node, results):
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36 if self.filename in blacklist:
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37 return
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38 elif self.filename == 'mercurial/util.py':
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39 touch_import('.', 'py3kcompat', node=node)
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40
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41 formatstr = results['formatstr'].clone()
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42 data = results['data'].clone()
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43 formatstr.prefix = '' # remove spaces from start
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44
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45 if isnumberremainder(formatstr, data):
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46 return
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47
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48 # We have two possibilities:
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49 # 1- An identifier or name is passed, it is going to be a leaf, thus, we
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50 # just need to copy its value as an argument to the formatter;
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51 # 2- A tuple is explicitly passed. In this case, we're gonna explode it
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52 # to pass to the formatter
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53 # TODO: Check for normal strings. They don't need to be translated
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54
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55 if is_tuple(data):
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56 args = [formatstr, Comma().clone()] + \
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57 [c.clone() for c in data.children[:]]
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58 else:
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59 args = [formatstr, Comma().clone(), data]
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60
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61 call = Call(Name('bytesformatter', prefix = ' '), args)
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62 return call
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63