annotate mercurial/templater.py @ 6422:3ee6f1fce94a

copies: fix silly precedence bug
author Matt Mackall <mpm@selenic.com>
date Sat, 29 Mar 2008 12:39:47 -0500
parents d2713d902524
children 62e0bb41e682
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1909
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Vadim Gelfer <vadim.gelfer@gmail.com>
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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
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6 # of the GNU General Public License, incorporated herein by reference.
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7
3891
6b4127c7d52a Simplify i18n imports
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8 from i18n import _
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9 import re, sys, os
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10 from mercurial import util
1901
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11
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12 def parsestring(s, quoted=True):
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13 '''parse a string using simple c-like syntax.
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14 string must be in quotes if quoted is True.'''
1902
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parents: 1901
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15 if quoted:
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16 if len(s) < 2 or s[0] != s[-1]:
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17 raise SyntaxError(_('unmatched quotes'))
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18 return s[1:-1].decode('string_escape')
3632
231393b7316f templater: use str.decode in parse_string
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19
231393b7316f templater: use str.decode in parse_string
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20 return s.decode('string_escape')
1896
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21
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22 class templater(object):
1909
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 1906
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23 '''template expansion engine.
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24
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25 template expansion works like this. a map file contains key=value
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parents: 1906
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26 pairs. if value is quoted, it is treated as string. otherwise, it
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27 is treated as name of template file.
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28
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29 templater is asked to expand a key in map. it looks up key, and
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TK Soh <teekaysoh@yahoo.com>
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30 looks for strings like this: {foo}. it expands {foo} by looking up
1909
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parents: 1906
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31 foo in map, and substituting it. expansion is recursive: it stops
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32 when there is no more {foo} to replace.
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33
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34 expansion also allows formatting and filtering.
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35
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36 format uses key to expand each item in list. syntax is
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37 {key%format}.
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38
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39 filter uses function to transform value. syntax is
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40 {key|filter1|filter2|...}.'''
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41
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42 template_re = re.compile(r"(?:(?:#(?=[\w\|%]+#))|(?:{(?=[\w\|%]+})))"
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43 r"(\w+)(?:(?:%(\w+))|((?:\|\w+)*))[#}]")
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44
1964
778281d46bb2 fix template bug that made hgweb break.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 1955
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45 def __init__(self, mapfile, filters={}, defaults={}, cache={}):
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 1906
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46 '''set up template engine.
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Vadim Gelfer <vadim.gelfer@gmail.com>
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47 mapfile is name of file to read map definitions from.
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Vadim Gelfer <vadim.gelfer@gmail.com>
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48 filters is dict of functions. each transforms a value into another.
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49 defaults is dict of default map definitions.'''
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parents: 1904
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50 self.mapfile = mapfile or 'template'
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6e1a8ea5d717 Duplicate cache when creating templater.
Shun-ichi Goto <shunichi.goto@gmail.com>
parents: 1964
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51 self.cache = cache.copy()
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52 self.map = {}
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53 self.base = (mapfile and os.path.dirname(mapfile)) or ''
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54 self.filters = filters
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55 self.defaults = defaults
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56
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57 if not mapfile:
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58 return
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parents: 5976
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59 if not os.path.exists(mapfile):
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60 raise util.Abort(_('style not found: %s') % mapfile)
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61
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62 i = 0
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63 for l in file(mapfile):
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a5bf0030df5f make --style=compact look for map-cmdline.compact.
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64 l = l.strip()
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65 i += 1
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66 if not l or l[0] in '#;': continue
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67 m = re.match(r'([a-zA-Z_][a-zA-Z0-9_]*)\s*=\s*(.+)$', l)
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68 if m:
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69 key, val = m.groups()
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70 if val[0] in "'\"":
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71 try:
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72 self.cache[key] = parsestring(val)
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73 except SyntaxError, inst:
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74 raise SyntaxError('%s:%s: %s' %
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75 (mapfile, i, inst.args[0]))
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76 else:
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77 self.map[key] = os.path.join(self.base, val)
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78 else:
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79 raise SyntaxError(_("%s:%s: parse error") % (mapfile, i))
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80
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81 def __contains__(self, key):
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82 return key in self.cache or key in self.map
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83
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84 def __call__(self, t, **map):
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85 '''perform expansion.
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86 t is name of map element to expand.
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87 map is added elements to use during expansion.'''
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d0576d065993 Prefer i in d over d.has_key(i)
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88 if not t in self.cache:
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89 try:
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90 self.cache[t] = file(self.map[t]).read()
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91 except IOError, inst:
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92 raise IOError(inst.args[0], _('template file %s: %s') %
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93 (self.map[t], inst.args[1]))
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94 tmpl = self.cache[t]
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95
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96 while tmpl:
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97 m = self.template_re.search(tmpl)
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98 if not m:
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99 yield tmpl
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100 break
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101
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102 start, end = m.span(0)
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103 key, format, fl = m.groups()
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104
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105 if start:
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106 yield tmpl[:start]
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107 tmpl = tmpl[end:]
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108
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109 if key in map:
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110 v = map[key]
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111 else:
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112 v = self.defaults.get(key, "")
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113 if callable(v):
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114 v = v(**map)
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115 if format:
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116 if not hasattr(v, '__iter__'):
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117 raise SyntaxError(_("Error expanding '%s%s'")
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118 % (key, format))
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119 lm = map.copy()
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120 for i in v:
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121 lm.update(i)
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122 yield self(format, **lm)
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123 else:
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124 if fl:
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125 for f in fl.split("|")[1:]:
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126 v = self.filters[f](v)
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127 yield v
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128
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129 def templatepath(name=None):
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130 '''return location of template file or directory (if no name).
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131 returns None if not found.'''
2189
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2001
diff changeset
132
2001
a439b7b51530 Windows py2exe version didn't handle names given to templatepath() correctly
Lee Cantey <lcantey@gmail.com>
parents: 1987
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133 # executable version (py2exe) doesn't support __file__
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Lee Cantey <lcantey@gmail.com>
parents: 1987
diff changeset
134 if hasattr(sys, 'frozen'):
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Lee Cantey <lcantey@gmail.com>
parents: 1987
diff changeset
135 module = sys.executable
a439b7b51530 Windows py2exe version didn't handle names given to templatepath() correctly
Lee Cantey <lcantey@gmail.com>
parents: 1987
diff changeset
136 else:
a439b7b51530 Windows py2exe version didn't handle names given to templatepath() correctly
Lee Cantey <lcantey@gmail.com>
parents: 1987
diff changeset
137 module = __file__
1899
888d298ddb91 many small changes to templater.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 1897
diff changeset
138 for f in 'templates', '../templates':
888d298ddb91 many small changes to templater.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 1897
diff changeset
139 fl = f.split('/')
888d298ddb91 many small changes to templater.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 1897
diff changeset
140 if name: fl.append(name)
2001
a439b7b51530 Windows py2exe version didn't handle names given to templatepath() correctly
Lee Cantey <lcantey@gmail.com>
parents: 1987
diff changeset
141 p = os.path.join(os.path.dirname(module), *fl)
1899
888d298ddb91 many small changes to templater.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 1897
diff changeset
142 if (name and os.path.exists(p)) or os.path.isdir(p):
1897
58b6784cf9f1 move hgweb.templatepath into templater
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 1896
diff changeset
143 return os.path.normpath(p)
2189
e3eba577a0ae move changeset_templater into templater module.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2001
diff changeset
144
5976
9f1e6ab76069 templates: move filters to their own module
Matt Mackall <mpm@selenic.com>
parents: 5975
diff changeset
145 def stringify(thing):
9f1e6ab76069 templates: move filters to their own module
Matt Mackall <mpm@selenic.com>
parents: 5975
diff changeset
146 '''turn nested template iterator into string.'''
9f1e6ab76069 templates: move filters to their own module
Matt Mackall <mpm@selenic.com>
parents: 5975
diff changeset
147 if hasattr(thing, '__iter__'):
9f1e6ab76069 templates: move filters to their own module
Matt Mackall <mpm@selenic.com>
parents: 5975
diff changeset
148 return "".join([stringify(t) for t in thing if t is not None])
9f1e6ab76069 templates: move filters to their own module
Matt Mackall <mpm@selenic.com>
parents: 5975
diff changeset
149 return str(thing)
9f1e6ab76069 templates: move filters to their own module
Matt Mackall <mpm@selenic.com>
parents: 5975
diff changeset
150