Mercurial > hg
annotate mercurial/templater.py @ 10061:9e2ab10728a2
Make {file_copies} usable as a --template key
Before this, to display file copies in templates, you had to write something
like {file_copies%filecopy}. For some reason, the {file_copy} subtemplate was
used by default but not defined by default in changeset_templater, while styles
were already using it. Here we define {file_copy} in changeset_templater, and
change the templater to handle formatting strings like {file_copies%filecopy}
with already expanded keys (in this case {file_copies}), for backward
compatibility.
author | Patrick Mezard <pmezard@gmail.com> |
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date | Sun, 13 Dec 2009 18:06:24 +0100 |
parents | d3dbdca92458 |
children | d6512b3e9ac0 |
rev | line source |
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1 # templater.py - template expansion for output |
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2 # |
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3 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2, incorporated herein by reference. |
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7 |
3891 | 8 from i18n import _ |
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9 import re, sys, os |
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10 import util, config, templatefilters |
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11 |
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12 path = ['templates', '../templates'] |
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13 stringify = templatefilters.stringify |
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14 |
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15 def parsestring(s, quoted=True): |
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16 '''parse a string using simple c-like syntax. |
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17 string must be in quotes if quoted is True.''' |
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18 if quoted: |
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19 if len(s) < 2 or s[0] != s[-1]: |
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20 raise SyntaxError(_('unmatched quotes')) |
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21 return s[1:-1].decode('string_escape') |
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22 |
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23 return s.decode('string_escape') |
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24 |
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25 class engine(object): |
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26 '''template expansion engine. |
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27 |
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28 template expansion works like this. a map file contains key=value |
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29 pairs. if value is quoted, it is treated as string. otherwise, it |
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30 is treated as name of template file. |
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31 |
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32 templater is asked to expand a key in map. it looks up key, and |
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33 looks for strings like this: {foo}. it expands {foo} by looking up |
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34 foo in map, and substituting it. expansion is recursive: it stops |
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35 when there is no more {foo} to replace. |
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36 |
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37 expansion also allows formatting and filtering. |
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38 |
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39 format uses key to expand each item in list. syntax is |
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40 {key%format}. |
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41 |
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42 filter uses function to transform value. syntax is |
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43 {key|filter1|filter2|...}.''' |
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44 |
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45 template_re = re.compile(r'{([\w\|%]+)}') |
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46 |
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47 def __init__(self, loader, filters={}, defaults={}): |
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48 self.loader = loader |
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49 self.filters = filters |
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50 self.defaults = defaults |
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51 self.cache = {} |
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52 |
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53 def process(self, t, map): |
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54 '''Perform expansion. t is name of map element to expand. map contains |
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55 added elements for use during expansion. Is a generator.''' |
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56 tmpl = self.loader(t) |
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57 iters = [self._process(tmpl, map)] |
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58 while iters: |
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59 try: |
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60 item = iters[0].next() |
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61 except StopIteration: |
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62 iters.pop(0) |
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63 continue |
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64 if isinstance(item, str): |
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65 yield item |
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66 elif item is None: |
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67 yield '' |
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68 elif hasattr(item, '__iter__'): |
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69 iters.insert(0, iter(item)) |
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70 else: |
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71 yield str(item) |
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72 |
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73 def _format(self, expr, get, map): |
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74 key, format = expr.split('%') |
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75 v = get(key) |
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76 if not hasattr(v, '__iter__'): |
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77 raise SyntaxError(_("error expanding '%s%%%s'") % (key, format)) |
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78 lm = map.copy() |
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79 for i in v: |
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80 if isinstance(i, dict): |
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81 lm.update(i) |
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82 yield self.process(format, lm) |
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83 else: |
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84 # v is not an iterable of dicts, this happen when 'key' |
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85 # has been fully expanded already and format is useless. |
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86 # If so, return the expanded value. |
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87 yield i |
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88 |
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89 def _filter(self, expr, get, map): |
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90 if expr not in self.cache: |
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91 parts = expr.split('|') |
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92 val = parts[0] |
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93 try: |
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94 filters = [self.filters[f] for f in parts[1:]] |
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95 except KeyError, i: |
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96 raise SyntaxError(_("unknown filter '%s'") % i[0]) |
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97 def apply(get): |
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98 x = get(val) |
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99 for f in filters: |
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100 x = f(x) |
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101 return x |
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102 self.cache[expr] = apply |
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103 return self.cache[expr](get) |
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104 |
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105 def _process(self, tmpl, map): |
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106 '''Render a template. Returns a generator.''' |
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107 |
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108 def get(key): |
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109 v = map.get(key) |
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110 if v is None: |
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111 v = self.defaults.get(key, '') |
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112 if hasattr(v, '__call__'): |
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113 v = v(**map) |
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114 return v |
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115 |
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116 while tmpl: |
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117 m = self.template_re.search(tmpl) |
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118 if not m: |
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119 yield tmpl |
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120 break |
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121 |
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|
122 start, end = m.span(0) |
8475
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templater: replace regex complexity by simple str containment checks
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parents:
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diff
changeset
|
123 variants = m.groups() |
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templater: replace regex complexity by simple str containment checks
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parents:
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diff
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|
124 expr = variants[0] or variants[1] |
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125 |
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126 if start: |
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127 yield tmpl[:start] |
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128 tmpl = tmpl[end:] |
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129 |
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130 if '%' in expr: |
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131 yield self._format(expr, get, map) |
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132 elif '|' in expr: |
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133 yield self._filter(expr, get, map) |
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134 else: |
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135 yield get(expr) |
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136 |
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137 engines = {'default': engine} |
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138 |
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139 class templater(object): |
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140 |
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141 def __init__(self, mapfile, filters={}, defaults={}, cache={}, |
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142 minchunk=1024, maxchunk=65536): |
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diff
changeset
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143 '''set up template engine. |
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144 mapfile is name of file to read map definitions from. |
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145 filters is dict of functions. each transforms a value into another. |
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parents:
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diff
changeset
|
146 defaults is dict of default map definitions.''' |
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parents:
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diff
changeset
|
147 self.mapfile = mapfile or 'template' |
1975
6e1a8ea5d717
Duplicate cache when creating templater.
Shun-ichi Goto <shunichi.goto@gmail.com>
parents:
1964
diff
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|
148 self.cache = cache.copy() |
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149 self.map = {} |
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|
150 self.base = (mapfile and os.path.dirname(mapfile)) or '' |
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parents:
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diff
changeset
|
151 self.filters = templatefilters.filters.copy() |
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152 self.filters.update(filters) |
1964
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fix template bug that made hgweb break.
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diff
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|
153 self.defaults = defaults |
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changeset
|
154 self.minchunk, self.maxchunk = minchunk, maxchunk |
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155 self.engines = {} |
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156 |
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157 if not mapfile: |
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158 return |
6337
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parents:
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diff
changeset
|
159 if not os.path.exists(mapfile): |
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160 raise util.Abort(_('style not found: %s') % mapfile) |
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161 |
8194
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|
162 conf = config.config() |
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163 conf.read(mapfile) |
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164 |
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165 for key, val in conf[''].items(): |
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166 if val[0] in "'\"": |
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167 try: |
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168 self.cache[key] = parsestring(val) |
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169 except SyntaxError, inst: |
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parents:
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changeset
|
170 raise SyntaxError('%s: %s' % |
8198
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config: getsource -> source
Matt Mackall <mpm@selenic.com>
parents:
8194
diff
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|
171 (conf.source('', key), inst.args[0])) |
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172 else: |
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173 val = 'default', val |
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174 if ':' in val[1]: |
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|
175 val = val[1].split(':', 1) |
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176 self.map[key] = val[0], os.path.join(self.base, val[1]) |
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177 |
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changeset
|
178 def __contains__(self, key): |
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179 return key in self.cache or key in self.map |
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180 |
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181 def load(self, t): |
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|
182 '''Get the template for the given template name. Use a local cache.''' |
5915
d0576d065993
Prefer i in d over d.has_key(i)
Christian Ebert <blacktrash@gmx.net>
parents:
5269
diff
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|
183 if not t in self.cache: |
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184 try: |
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185 self.cache[t] = open(self.map[t][1]).read() |
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186 except IOError, inst: |
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|
187 raise IOError(inst.args[0], _('template file %s: %s') % |
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188 (self.map[t][1], inst.args[1])) |
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189 return self.cache[t] |
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190 |
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|
191 def __call__(self, t, **map): |
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192 ttype = t in self.map and self.map[t][0] or 'default' |
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193 proc = self.engines.get(ttype) |
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194 if proc is None: |
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195 proc = engines[ttype](self.load, self.filters, self.defaults) |
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|
196 self.engines[ttype] = proc |
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197 |
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198 stream = proc.process(t, map) |
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|
199 if self.minchunk: |
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200 stream = util.increasingchunks(stream, min=self.minchunk, |
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|
201 max=self.maxchunk) |
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|
202 return stream |
7434
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kill some trailing spaces
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changeset
|
203 |
1899
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changeset
|
204 def templatepath(name=None): |
1909
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parents:
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diff
changeset
|
205 '''return location of template file or directory (if no name). |
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changeset
|
206 returns None if not found.''' |
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changeset
|
207 normpaths = [] |
2189
e3eba577a0ae
move changeset_templater into templater module.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2001
diff
changeset
|
208 |
2001
a439b7b51530
Windows py2exe version didn't handle names given to templatepath() correctly
Lee Cantey <lcantey@gmail.com>
parents:
1987
diff
changeset
|
209 # executable version (py2exe) doesn't support __file__ |
a439b7b51530
Windows py2exe version didn't handle names given to templatepath() correctly
Lee Cantey <lcantey@gmail.com>
parents:
1987
diff
changeset
|
210 if hasattr(sys, 'frozen'): |
a439b7b51530
Windows py2exe version didn't handle names given to templatepath() correctly
Lee Cantey <lcantey@gmail.com>
parents:
1987
diff
changeset
|
211 module = sys.executable |
a439b7b51530
Windows py2exe version didn't handle names given to templatepath() correctly
Lee Cantey <lcantey@gmail.com>
parents:
1987
diff
changeset
|
212 else: |
a439b7b51530
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parents:
1987
diff
changeset
|
213 module = __file__ |
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|
214 for f in path: |
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|
215 if f.startswith('/'): |
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changeset
|
216 p = f |
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|
217 else: |
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|
218 fl = f.split('/') |
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|
219 p = os.path.join(os.path.dirname(module), *fl) |
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|
220 if name: |
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|
221 p = os.path.join(p, name) |
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diff
changeset
|
222 if name and os.path.exists(p): |
1897
58b6784cf9f1
move hgweb.templatepath into templater
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parents:
1896
diff
changeset
|
223 return os.path.normpath(p) |
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|
224 elif os.path.isdir(p): |
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225 normpaths.append(os.path.normpath(p)) |
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226 |
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227 return normpaths |
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move changeset_templater into templater module.
Vadim Gelfer <vadim.gelfer@gmail.com>
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228 |
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229 def stylemap(styles, paths=None): |
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230 """Return path to mapfile for a given style. |
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231 |
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232 Searches mapfile in the following locations: |
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233 1. templatepath/style/map |
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234 2. templatepath/map-style |
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235 3. templatepath/map |
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236 """ |
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237 |
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238 if paths is None: |
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239 paths = templatepath() |
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240 elif isinstance(paths, str): |
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templater: fix little problem from stylemap() changes
Dirkjan Ochtman <dirkjan@ochtman.nl>
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241 paths = [paths] |
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242 |
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243 if isinstance(styles, str): |
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244 styles = [styles] |
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245 |
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246 for style in styles: |
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247 |
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248 if not style: |
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249 continue |
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250 locations = [os.path.join(style, 'map'), 'map-' + style] |
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251 locations.append('map') |
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252 |
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253 for path in paths: |
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254 for location in locations: |
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255 mapfile = os.path.join(path, location) |
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256 if os.path.isfile(mapfile): |
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257 return style, mapfile |
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258 |
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259 raise RuntimeError("No hgweb templates found in %r" % paths) |