Mercurial > p > roundup > code
annotate roundup/cgi/PageTemplates/PythonExpr.py @ 5296:b48e2fe4a7bd
Make tracker user native (postgres) test indexer. This is apparently
how things are expected to be set up on the server. Leaving
it blank pulls in the xapian indexer which they don't want.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Thu, 28 Sep 2017 19:22:21 -0400 |
| parents | 6e3e4f24c753 |
| children | 35ea9b1efc14 |
| rev | line source |
|---|---|
| 1049 | 1 ############################################################################## |
| 2 # | |
| 3 # Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved. | |
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4 # |
| 1049 | 5 # This software is subject to the provisions of the Zope Public License, |
| 6 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution. | |
| 7 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED | |
| 8 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 9 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS | |
| 10 # FOR A PARTICULAR PURPOSE | |
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11 # |
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12 ############################################################################## |
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13 # Modified for Roundup: |
| 1049 | 14 # |
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15 # 1. more informative traceback info |
| 1049 | 16 |
| 17 """Generic Python Expression Handler | |
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18 """ |
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Adhering to ZPL
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19 |
| 1049 | 20 from TALES import CompilerError |
| 21 from sys import exc_info | |
| 22 | |
| 23 class getSecurityManager: | |
| 24 '''Null security manager''' | |
| 25 def validate(self, *args, **kwargs): | |
| 26 return 1 | |
| 27 addContext = removeContext = validateValue = validate | |
| 28 | |
| 29 class PythonExpr: | |
| 30 def __init__(self, name, expr, engine): | |
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31 self.expr = expr = expr.strip().replace('\n', ' ') |
| 1049 | 32 try: |
| 33 d = {} | |
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34 exec 'def f():\n return %s\n' % expr.strip() in d |
| 1049 | 35 self._f = d['f'] |
| 36 except: | |
| 37 raise CompilerError, ('Python expression error:\n' | |
| 38 '%s: %s') % exc_info()[:2] | |
| 39 self._get_used_names() | |
| 40 | |
| 41 def _get_used_names(self): | |
| 42 self._f_varnames = vnames = [] | |
| 43 for vname in self._f.func_code.co_names: | |
| 44 if vname[0] not in '$_': | |
| 45 vnames.append(vname) | |
| 46 | |
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47 def _bind_used_names(self, econtext, _marker=[]): |
| 1049 | 48 # Bind template variables |
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49 names = {'CONTEXTS': econtext.contexts} |
| 1049 | 50 vars = econtext.vars |
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51 getType = econtext.getCompiler().getTypes().get |
| 1049 | 52 for vname in self._f_varnames: |
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53 val = vars.get(vname, _marker) |
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54 if val is _marker: |
| 1049 | 55 has = val = getType(vname) |
| 56 if has: | |
| 57 val = ExprTypeProxy(vname, val, econtext) | |
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58 names[vname] = val |
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59 else: |
| 1049 | 60 names[vname] = val |
| 61 return names | |
| 62 | |
| 63 def __call__(self, econtext): | |
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much nicer error messages when there's a templating error
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64 __traceback_info__ = 'python expression "%s"'%self.expr |
| 1049 | 65 f = self._f |
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66 f.func_globals.update(self._bind_used_names(econtext)) |
| 1049 | 67 return f() |
| 68 | |
| 69 def __str__(self): | |
| 70 return 'Python expression "%s"' % self.expr | |
| 71 def __repr__(self): | |
| 72 return '<PythonExpr %s>' % self.expr | |
| 73 | |
| 74 class ExprTypeProxy: | |
| 75 '''Class that proxies access to an expression type handler''' | |
| 76 def __init__(self, name, handler, econtext): | |
| 77 self._name = name | |
| 78 self._handler = handler | |
| 79 self._econtext = econtext | |
| 80 def __call__(self, text): | |
| 81 return self._handler(self._name, text, | |
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parents:
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diff
changeset
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82 self._econtext.getCompiler())(self._econtext) |
| 1049 | 83 |