Mercurial > hg
annotate mercurial/help.py @ 20835:0e8417131a29
util: add the code path to "cachefunc()" for the function taking no arguments
Before this patch, "util.cachefunc()" caches the value returned by the
specified function into dictionary "cache", even if the specified
function takes no arguments.
In such case, "cache" has at most one entry, and distinction between
entries in "cache" is meaningless.
This patch adds the code path to "cachefunc()" for the function taking
no arguments for efficiency: to store only one cached value, using
list "cache" is a little faster than using dictionary "cache".
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Sat, 15 Feb 2014 19:52:26 +0900 |
parents | 3879ac3858ff |
children | eb6eaef7ae44 |
rev | line source |
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1 # help.py - help data for mercurial |
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2 # |
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3 # Copyright 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 |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from i18n import gettext, _ |
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9 import itertools, sys, os |
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10 import error |
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11 import extensions, revset, fileset, templatekw, templatefilters, filemerge |
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12 import encoding, util, minirst |
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13 import cmdutil |
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14 |
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15 def listexts(header, exts, indent=1, showdeprecated=False): |
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16 '''return a text listing of the given extensions''' |
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17 rst = [] |
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18 if exts: |
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19 rst.append('\n%s\n\n' % header) |
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20 for name, desc in sorted(exts.iteritems()): |
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21 if '(DEPRECATED)' in desc and not showdeprecated: |
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22 continue |
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23 rst.append('%s:%s: %s\n' % (' ' * indent, name, desc)) |
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24 return rst |
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25 |
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26 def extshelp(): |
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27 rst = loaddoc('extensions')().splitlines(True) |
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28 rst.extend(listexts( |
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29 _('enabled extensions:'), extensions.enabled(), showdeprecated=True)) |
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30 rst.extend(listexts(_('disabled extensions:'), extensions.disabled())) |
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31 doc = ''.join(rst) |
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32 return doc |
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33 |
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34 def optrst(options, verbose): |
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35 data = [] |
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36 multioccur = False |
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37 for option in options: |
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38 if len(option) == 5: |
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39 shortopt, longopt, default, desc, optlabel = option |
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40 else: |
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41 shortopt, longopt, default, desc = option |
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42 optlabel = _("VALUE") # default label |
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43 |
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44 if not verbose and ("DEPRECATED" in desc or _("DEPRECATED") in desc): |
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45 continue |
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46 |
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47 so = '' |
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48 if shortopt: |
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49 so = '-' + shortopt |
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50 lo = '--' + longopt |
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51 if default: |
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52 desc += _(" (default: %s)") % default |
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53 |
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54 if isinstance(default, list): |
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55 lo += " %s [+]" % optlabel |
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56 multioccur = True |
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57 elif (default is not None) and not isinstance(default, bool): |
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58 lo += " %s" % optlabel |
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59 |
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60 data.append((so, lo, desc)) |
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61 |
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62 rst = minirst.maketable(data, 1) |
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63 |
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64 if multioccur: |
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65 rst.append(_("\n[+] marked option can be specified multiple times\n")) |
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66 |
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67 return ''.join(rst) |
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68 |
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69 def indicateomitted(rst, omitted, notomitted=None): |
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70 rst.append('\n\n.. container:: omitted\n\n %s\n\n' % omitted) |
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71 if notomitted: |
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72 rst.append('\n\n.. container:: notomitted\n\n %s\n\n' % notomitted) |
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73 |
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74 def topicmatch(kw): |
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75 """Return help topics matching kw. |
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76 |
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77 Returns {'section': [(name, summary), ...], ...} where section is |
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78 one of topics, commands, extensions, or extensioncommands. |
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79 """ |
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80 kw = encoding.lower(kw) |
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81 def lowercontains(container): |
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82 return kw in encoding.lower(container) # translated in helptable |
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83 results = {'topics': [], |
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84 'commands': [], |
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85 'extensions': [], |
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86 'extensioncommands': [], |
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87 } |
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88 for names, header, doc in helptable: |
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89 if (sum(map(lowercontains, names)) |
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90 or lowercontains(header) |
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91 or lowercontains(doc())): |
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92 results['topics'].append((names[0], header)) |
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93 import commands # avoid cycle |
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94 for cmd, entry in commands.table.iteritems(): |
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95 if len(entry) == 3: |
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96 summary = entry[2] |
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97 else: |
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98 summary = '' |
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99 # translate docs *before* searching there |
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100 docs = _(getattr(entry[0], '__doc__', None)) or '' |
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101 if kw in cmd or lowercontains(summary) or lowercontains(docs): |
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102 doclines = docs.splitlines() |
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103 if doclines: |
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104 summary = doclines[0] |
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105 cmdname = cmd.split('|')[0].lstrip('^') |
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106 results['commands'].append((cmdname, summary)) |
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107 for name, docs in itertools.chain( |
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108 extensions.enabled(False).iteritems(), |
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109 extensions.disabled().iteritems()): |
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110 # extensions.load ignores the UI argument |
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111 mod = extensions.load(None, name, '') |
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112 name = name.split('.')[-1] |
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113 if lowercontains(name) or lowercontains(docs): |
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114 # extension docs are already translated |
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115 results['extensions'].append((name, docs.splitlines()[0])) |
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116 for cmd, entry in getattr(mod, 'cmdtable', {}).iteritems(): |
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117 if kw in cmd or (len(entry) > 2 and lowercontains(entry[2])): |
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118 cmdname = cmd.split('|')[0].lstrip('^') |
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119 if entry[0].__doc__: |
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120 cmddoc = gettext(entry[0].__doc__).splitlines()[0] |
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121 else: |
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122 cmddoc = _('(no help text available)') |
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123 results['extensioncommands'].append((cmdname, cmddoc)) |
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124 return results |
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125 |
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126 def loaddoc(topic): |
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127 """Return a delayed loader for help/topic.txt.""" |
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129 def loader(): |
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130 if util.mainfrozen(): |
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131 module = sys.executable |
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132 else: |
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133 module = __file__ |
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134 base = os.path.dirname(module) |
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135 |
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136 for dir in ('.', '..'): |
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137 docdir = os.path.join(base, dir, 'help') |
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138 if os.path.isdir(docdir): |
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139 break |
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140 |
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141 path = os.path.join(docdir, topic + ".txt") |
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142 doc = gettext(util.readfile(path)) |
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143 for rewriter in helphooks.get(topic, []): |
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144 doc = rewriter(topic, doc) |
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145 return doc |
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146 |
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147 return loader |
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148 |
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149 helptable = sorted([ |
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150 (["config", "hgrc"], _("Configuration Files"), loaddoc('config')), |
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151 (["dates"], _("Date Formats"), loaddoc('dates')), |
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152 (["patterns"], _("File Name Patterns"), loaddoc('patterns')), |
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153 (['environment', 'env'], _('Environment Variables'), |
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154 loaddoc('environment')), |
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155 (['revisions', 'revs'], _('Specifying Single Revisions'), |
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156 loaddoc('revisions')), |
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157 (['multirevs', 'mrevs'], _('Specifying Multiple Revisions'), |
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158 loaddoc('multirevs')), |
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159 (['revsets', 'revset'], _("Specifying Revision Sets"), loaddoc('revsets')), |
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160 (['filesets', 'fileset'], _("Specifying File Sets"), loaddoc('filesets')), |
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161 (['diffs'], _('Diff Formats'), loaddoc('diffs')), |
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162 (['merge-tools', 'mergetools'], _('Merge Tools'), loaddoc('merge-tools')), |
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163 (['templating', 'templates', 'template', 'style'], _('Template Usage'), |
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164 loaddoc('templates')), |
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165 (['urls'], _('URL Paths'), loaddoc('urls')), |
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166 (["extensions"], _("Using Additional Features"), extshelp), |
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167 (["subrepos", "subrepo"], _("Subrepositories"), loaddoc('subrepos')), |
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168 (["hgweb"], _("Configuring hgweb"), loaddoc('hgweb')), |
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169 (["glossary"], _("Glossary"), loaddoc('glossary')), |
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170 (["hgignore", "ignore"], _("Syntax for Mercurial Ignore Files"), |
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171 loaddoc('hgignore')), |
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172 (["phases"], _("Working with Phases"), loaddoc('phases')), |
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173 ]) |
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174 |
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175 # Map topics to lists of callable taking the current topic help and |
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176 # returning the updated version |
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177 helphooks = {} |
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178 |
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179 def addtopichook(topic, rewriter): |
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180 helphooks.setdefault(topic, []).append(rewriter) |
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181 |
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182 def makeitemsdoc(topic, doc, marker, items): |
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183 """Extract docstring from the items key to function mapping, build a |
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184 .single documentation block and use it to overwrite the marker in doc |
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185 """ |
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186 entries = [] |
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187 for name in sorted(items): |
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188 text = (items[name].__doc__ or '').rstrip() |
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189 if not text: |
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190 continue |
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191 text = gettext(text) |
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192 lines = text.splitlines() |
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193 doclines = [(lines[0])] |
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194 for l in lines[1:]: |
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195 # Stop once we find some Python doctest |
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196 if l.strip().startswith('>>>'): |
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197 break |
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198 doclines.append(' ' + l.strip()) |
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199 entries.append('\n'.join(doclines)) |
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200 entries = '\n\n'.join(entries) |
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201 return doc.replace(marker, entries) |
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202 |
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203 def addtopicsymbols(topic, marker, symbols): |
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204 def add(topic, doc): |
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205 return makeitemsdoc(topic, doc, marker, symbols) |
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206 addtopichook(topic, add) |
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207 |
14686 | 208 addtopicsymbols('filesets', '.. predicatesmarker', fileset.symbols) |
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209 addtopicsymbols('merge-tools', '.. internaltoolsmarker', filemerge.internals) |
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210 addtopicsymbols('revsets', '.. predicatesmarker', revset.symbols) |
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211 addtopicsymbols('templates', '.. keywordsmarker', templatekw.dockeywords) |
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212 addtopicsymbols('templates', '.. filtersmarker', templatefilters.filters) |
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213 |
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214 def help_(ui, name, unknowncmd=False, full=True, **opts): |
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215 ''' |
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216 Generate the help for 'name' as unformatted restructured text. If |
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217 'name' is None, describe the commands available. |
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218 ''' |
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219 |
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220 import commands # avoid cycle |
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221 |
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222 def helpcmd(name): |
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223 try: |
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224 aliases, entry = cmdutil.findcmd(name, commands.table, |
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225 strict=unknowncmd) |
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226 except error.AmbiguousCommand, inst: |
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227 # py3k fix: except vars can't be used outside the scope of the |
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228 # except block, nor can be used inside a lambda. python issue4617 |
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229 prefix = inst.args[0] |
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230 select = lambda c: c.lstrip('^').startswith(prefix) |
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231 rst = helplist(select) |
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232 return rst |
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233 |
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234 rst = [] |
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235 |
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236 # check if it's an invalid alias and display its error if it is |
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237 if getattr(entry[0], 'badalias', False): |
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238 if not unknowncmd: |
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239 ui.pushbuffer() |
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240 entry[0](ui) |
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241 rst.append(ui.popbuffer()) |
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242 return rst |
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243 |
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244 # synopsis |
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245 if len(entry) > 2: |
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246 if entry[2].startswith('hg'): |
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247 rst.append("%s\n" % entry[2]) |
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248 else: |
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249 rst.append('hg %s %s\n' % (aliases[0], entry[2])) |
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250 else: |
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251 rst.append('hg %s\n' % aliases[0]) |
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252 # aliases |
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253 if full and not ui.quiet and len(aliases) > 1: |
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254 rst.append(_("\naliases: %s\n") % ', '.join(aliases[1:])) |
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255 rst.append('\n') |
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256 |
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257 # description |
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258 doc = gettext(entry[0].__doc__) |
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259 if not doc: |
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260 doc = _("(no help text available)") |
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261 if util.safehasattr(entry[0], 'definition'): # aliased command |
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262 if entry[0].definition.startswith('!'): # shell alias |
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263 doc = _('shell alias for::\n\n %s') % entry[0].definition[1:] |
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264 else: |
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265 doc = _('alias for: hg %s\n\n%s') % (entry[0].definition, doc) |
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266 doc = doc.splitlines(True) |
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267 if ui.quiet or not full: |
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268 rst.append(doc[0]) |
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269 else: |
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270 rst.extend(doc) |
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271 rst.append('\n') |
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272 |
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273 # check if this command shadows a non-trivial (multi-line) |
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274 # extension help text |
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275 try: |
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276 mod = extensions.find(name) |
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277 doc = gettext(mod.__doc__) or '' |
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278 if '\n' in doc.strip(): |
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279 msg = _('use "hg help -e %s" to show help for ' |
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280 'the %s extension') % (name, name) |
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281 rst.append('\n%s\n' % msg) |
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282 except KeyError: |
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283 pass |
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284 |
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285 # options |
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286 if not ui.quiet and entry[1]: |
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287 rst.append('\n%s\n\n' % _("options:")) |
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288 rst.append(optrst(entry[1], ui.verbose)) |
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289 |
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290 if ui.verbose: |
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291 rst.append('\n%s\n\n' % _("global options:")) |
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292 rst.append(optrst(commands.globalopts, ui.verbose)) |
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293 |
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294 if not ui.verbose: |
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295 if not full: |
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296 rst.append(_('\nuse "hg help %s" to show the full help text\n') |
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297 % name) |
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298 elif not ui.quiet: |
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299 omitted = _('use "hg -v help %s" to show more complete' |
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300 ' help and the global options') % name |
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301 notomitted = _('use "hg -v help %s" to show' |
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302 ' the global options') % name |
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303 indicateomitted(rst, omitted, notomitted) |
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304 |
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305 return rst |
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306 |
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307 |
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308 def helplist(select=None): |
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309 # list of commands |
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310 if name == "shortlist": |
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311 header = _('basic commands:\n\n') |
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312 elif name == "debug": |
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313 header = _('debug commands (internal and unsupported):\n\n') |
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314 else: |
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315 header = _('list of commands:\n\n') |
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316 |
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317 h = {} |
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318 cmds = {} |
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319 for c, e in commands.table.iteritems(): |
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320 f = c.split("|", 1)[0] |
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321 if select and not select(f): |
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322 continue |
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323 if (not select and name != 'shortlist' and |
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324 e[0].__module__ != commands.__name__): |
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325 continue |
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326 if name == "shortlist" and not f.startswith("^"): |
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327 continue |
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328 f = f.lstrip("^") |
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329 if not ui.debugflag and f.startswith("debug") and name != "debug": |
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330 continue |
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331 doc = e[0].__doc__ |
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332 if doc and 'DEPRECATED' in doc and not ui.verbose: |
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333 continue |
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334 doc = gettext(doc) |
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335 if not doc: |
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336 doc = _("(no help text available)") |
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337 h[f] = doc.splitlines()[0].rstrip() |
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338 cmds[f] = c.lstrip("^") |
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339 |
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340 rst = [] |
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341 if not h: |
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342 if not ui.quiet: |
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343 rst.append(_('no commands defined\n')) |
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344 return rst |
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345 |
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346 if not ui.quiet: |
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347 rst.append(header) |
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348 fns = sorted(h) |
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349 for f in fns: |
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350 if ui.verbose: |
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351 commacmds = cmds[f].replace("|",", ") |
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352 rst.append(" :%s: %s\n" % (commacmds, h[f])) |
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353 else: |
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354 rst.append(' :%s: %s\n' % (f, h[f])) |
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355 |
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356 if not name: |
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357 exts = listexts(_('enabled extensions:'), extensions.enabled()) |
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358 if exts: |
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359 rst.append('\n') |
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360 rst.extend(exts) |
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361 |
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362 rst.append(_("\nadditional help topics:\n\n")) |
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363 topics = [] |
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364 for names, header, doc in helptable: |
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365 topics.append((names[0], header)) |
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366 for t, desc in topics: |
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367 rst.append(" :%s: %s\n" % (t, desc)) |
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368 |
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369 optlist = [] |
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370 if not ui.quiet: |
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371 if ui.verbose: |
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372 optlist.append((_("global options:"), commands.globalopts)) |
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373 if name == 'shortlist': |
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374 optlist.append((_('use "hg help" for the full list ' |
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375 'of commands'), ())) |
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376 else: |
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377 if name == 'shortlist': |
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378 msg = _('use "hg help" for the full list of commands ' |
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379 'or "hg -v" for details') |
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380 elif name and not full: |
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381 msg = _('use "hg help %s" to show the full help ' |
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382 'text') % name |
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383 else: |
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384 msg = _('use "hg -v help%s" to show builtin aliases and ' |
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385 'global options') % (name and " " + name or "") |
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386 optlist.append((msg, ())) |
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387 |
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388 if optlist: |
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389 for title, options in optlist: |
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390 rst.append('\n%s\n' % title) |
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391 if options: |
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392 rst.append('\n%s\n' % optrst(options, ui.verbose)) |
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393 return rst |
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394 |
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395 def helptopic(name): |
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396 for names, header, doc in helptable: |
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397 if name in names: |
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398 break |
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399 else: |
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400 raise error.UnknownCommand(name) |
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401 |
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402 rst = [minirst.section(header)] |
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403 |
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404 # description |
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405 if not doc: |
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406 rst.append(" %s\n" % _("(no help text available)")) |
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407 if util.safehasattr(doc, '__call__'): |
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408 rst += [" %s\n" % l for l in doc().splitlines()] |
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409 |
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410 if not ui.verbose: |
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411 omitted = (_('use "hg help -v %s" to show more complete help') % |
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412 name) |
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413 indicateomitted(rst, omitted) |
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414 |
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415 try: |
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416 cmdutil.findcmd(name, commands.table) |
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417 rst.append(_('\nuse "hg help -c %s" to see help for ' |
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418 'the %s command\n') % (name, name)) |
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419 except error.UnknownCommand: |
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420 pass |
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421 return rst |
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422 |
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423 def helpext(name): |
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424 try: |
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425 mod = extensions.find(name) |
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426 doc = gettext(mod.__doc__) or _('no help text available') |
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427 except KeyError: |
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428 mod = None |
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429 doc = extensions.disabledext(name) |
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430 if not doc: |
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431 raise error.UnknownCommand(name) |
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432 |
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433 if '\n' not in doc: |
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434 head, tail = doc, "" |
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435 else: |
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436 head, tail = doc.split('\n', 1) |
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437 rst = [_('%s extension - %s\n\n') % (name.split('.')[-1], head)] |
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438 if tail: |
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439 rst.extend(tail.splitlines(True)) |
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440 rst.append('\n') |
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441 |
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442 if not ui.verbose: |
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443 omitted = (_('use "hg help -v %s" to show more complete help') % |
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444 name) |
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445 indicateomitted(rst, omitted) |
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446 |
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447 if mod: |
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448 try: |
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449 ct = mod.cmdtable |
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450 except AttributeError: |
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451 ct = {} |
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452 modcmds = set([c.split('|', 1)[0] for c in ct]) |
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453 rst.extend(helplist(modcmds.__contains__)) |
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454 else: |
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455 rst.append(_('use "hg help extensions" for information on enabling ' |
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456 'extensions\n')) |
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457 return rst |
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458 |
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459 def helpextcmd(name): |
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460 cmd, ext, mod = extensions.disabledcmd(ui, name, |
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461 ui.configbool('ui', 'strict')) |
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462 doc = gettext(mod.__doc__).splitlines()[0] |
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463 |
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464 rst = listexts(_("'%s' is provided by the following " |
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465 "extension:") % cmd, {ext: doc}, indent=4) |
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466 rst.append('\n') |
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467 rst.append(_('use "hg help extensions" for information on enabling ' |
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468 'extensions\n')) |
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469 return rst |
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470 |
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471 |
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472 rst = [] |
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473 kw = opts.get('keyword') |
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474 if kw: |
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475 matches = topicmatch(kw) |
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476 for t, title in (('topics', _('Topics')), |
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477 ('commands', _('Commands')), |
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478 ('extensions', _('Extensions')), |
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479 ('extensioncommands', _('Extension Commands'))): |
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480 if matches[t]: |
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481 rst.append('%s:\n\n' % title) |
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482 rst.extend(minirst.maketable(sorted(matches[t]), 1)) |
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483 rst.append('\n') |
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484 elif name and name != 'shortlist': |
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485 i = None |
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486 if unknowncmd: |
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487 queries = (helpextcmd,) |
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488 elif opts.get('extension'): |
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489 queries = (helpext,) |
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490 elif opts.get('command'): |
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491 queries = (helpcmd,) |
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492 else: |
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493 queries = (helptopic, helpcmd, helpext, helpextcmd) |
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494 for f in queries: |
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495 try: |
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496 rst = f(name) |
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497 i = None |
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498 break |
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499 except error.UnknownCommand, inst: |
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500 i = inst |
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501 if i: |
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502 raise i |
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503 else: |
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504 # program name |
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505 if not ui.quiet: |
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506 rst = [_("Mercurial Distributed SCM\n"), '\n'] |
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507 rst.extend(helplist()) |
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508 |
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509 return ''.join(rst) |