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comparison mercurial/templater.py @ 8476:d5dda64f5552

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templater: keep a cache of Python functions for filter expressions
author Dirkjan Ochtman <dirkjan@ochtman.nl>
date Sun, 17 May 2009 16:08:47 +0200
parents caaf1e779b37
children d72d1a97408a
comparison
equal deleted inserted replaced
8475:caaf1e779b37 8476:d5dda64f5552
46 46
47 def __init__(self, loader, filters={}, defaults={}): 47 def __init__(self, loader, filters={}, defaults={}):
48 self.loader = loader 48 self.loader = loader
49 self.filters = filters 49 self.filters = filters
50 self.defaults = defaults 50 self.defaults = defaults
51 self.cache = {}
51 52
52 def process(self, t, map): 53 def process(self, t, map):
53 '''Perform expansion. t is name of map element to expand. map contains 54 '''Perform expansion. t is name of map element to expand. map contains
54 added elements for use during expansion. Is a generator.''' 55 added elements for use during expansion. Is a generator.'''
55 tmpl = self.loader(t) 56 tmpl = self.loader(t)
78 for i in v: 79 for i in v:
79 lm.update(i) 80 lm.update(i)
80 yield self.process(format, lm) 81 yield self.process(format, lm)
81 82
82 def _filter(self, expr, get, map): 83 def _filter(self, expr, get, map):
83 parts = expr.split('|') 84 if expr not in self.cache:
84 v = get(parts[0]) 85 parts = expr.split('|')
85 for f in parts[1:]: 86 filters = parts[1:]
86 v = self.filters[f](v) 87 for f in filters:
87 return v 88 if f not in self.filters:
89 raise SyntaxError(_("unknown filter '%s'") % expr)
90 calls = '('.join(i for i in reversed(filters))
91 end = ')' * len(filters)
92 code = "lambda _get: %s(_get('%s')%s" % (calls, parts[0], end)
93 self.cache[expr] = eval(code, self.filters)
94 return self.cache[expr](get)
88 95
89 def _process(self, tmpl, map): 96 def _process(self, tmpl, map):
90 '''Render a template. Returns a generator.''' 97 '''Render a template. Returns a generator.'''
91 98
92 def get(key): 99 def get(key):