Mercurial > hg
annotate mercurial/help.py @ 24793:2ec894582ea2
bundle2: add a 'copy' method on parts
This is the first step in our quest for preserving the server output on error
(issue4594). We want to be able to copy the output parts from the aborted reply
into the exception bundle.
The function will be used in a later patch.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Thu, 16 Apr 2015 03:15:28 -0400 |
parents | 76c0b4cfa039 |
children | 117b9a101f71 |
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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, os, textwrap |
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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 templater |
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13 import encoding, util, minirst |
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14 import cmdutil |
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15 import hgweb.webcommands as webcommands |
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16 |
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17 def listexts(header, exts, indent=1, showdeprecated=False): |
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18 '''return a text listing of the given extensions''' |
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19 rst = [] |
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20 if exts: |
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21 rst.append('\n%s\n\n' % header) |
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22 for name, desc in sorted(exts.iteritems()): |
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23 if '(DEPRECATED)' in desc and not showdeprecated: |
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24 continue |
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25 rst.append('%s:%s: %s\n' % (' ' * indent, name, desc)) |
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26 return rst |
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27 |
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28 def extshelp(): |
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29 rst = loaddoc('extensions')().splitlines(True) |
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30 rst.extend(listexts( |
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31 _('enabled extensions:'), extensions.enabled(), showdeprecated=True)) |
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32 rst.extend(listexts(_('disabled extensions:'), extensions.disabled())) |
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33 doc = ''.join(rst) |
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34 return doc |
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35 |
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36 def optrst(header, options, verbose): |
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37 data = [] |
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38 multioccur = False |
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39 for option in options: |
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40 if len(option) == 5: |
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41 shortopt, longopt, default, desc, optlabel = option |
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42 else: |
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43 shortopt, longopt, default, desc = option |
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44 optlabel = _("VALUE") # default label |
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45 |
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46 if not verbose and ("DEPRECATED" in desc or _("DEPRECATED") in desc): |
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47 continue |
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48 |
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49 so = '' |
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50 if shortopt: |
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51 so = '-' + shortopt |
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52 lo = '--' + longopt |
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53 if default: |
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54 desc += _(" (default: %s)") % default |
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55 |
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56 if isinstance(default, list): |
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57 lo += " %s [+]" % optlabel |
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58 multioccur = True |
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59 elif (default is not None) and not isinstance(default, bool): |
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60 lo += " %s" % optlabel |
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61 |
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62 data.append((so, lo, desc)) |
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63 |
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64 if multioccur: |
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65 header += (_(" ([+] can be repeated)")) |
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66 |
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67 rst = ['\n%s:\n\n' % header] |
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68 rst.extend(minirst.maketable(data, 1)) |
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69 |
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70 return ''.join(rst) |
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71 |
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72 def indicateomitted(rst, omitted, notomitted=None): |
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73 rst.append('\n\n.. container:: omitted\n\n %s\n\n' % omitted) |
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74 if notomitted: |
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75 rst.append('\n\n.. container:: notomitted\n\n %s\n\n' % notomitted) |
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76 |
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77 def topicmatch(kw): |
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78 """Return help topics matching kw. |
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79 |
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80 Returns {'section': [(name, summary), ...], ...} where section is |
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81 one of topics, commands, extensions, or extensioncommands. |
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82 """ |
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83 kw = encoding.lower(kw) |
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84 def lowercontains(container): |
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85 return kw in encoding.lower(container) # translated in helptable |
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86 results = {'topics': [], |
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87 'commands': [], |
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88 'extensions': [], |
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89 'extensioncommands': [], |
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90 } |
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91 for names, header, doc in helptable: |
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92 # Old extensions may use a str as doc. |
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93 if (sum(map(lowercontains, names)) |
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94 or lowercontains(header) |
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95 or (callable(doc) and lowercontains(doc()))): |
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96 results['topics'].append((names[0], header)) |
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97 import commands # avoid cycle |
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98 for cmd, entry in commands.table.iteritems(): |
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99 if len(entry) == 3: |
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100 summary = entry[2] |
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101 else: |
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102 summary = '' |
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103 # translate docs *before* searching there |
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104 docs = _(getattr(entry[0], '__doc__', None)) or '' |
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105 if kw in cmd or lowercontains(summary) or lowercontains(docs): |
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106 doclines = docs.splitlines() |
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107 if doclines: |
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108 summary = doclines[0] |
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109 cmdname = cmd.split('|')[0].lstrip('^') |
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110 results['commands'].append((cmdname, summary)) |
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111 for name, docs in itertools.chain( |
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112 extensions.enabled(False).iteritems(), |
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113 extensions.disabled().iteritems()): |
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114 # extensions.load ignores the UI argument |
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115 mod = extensions.load(None, name, '') |
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116 name = name.split('.')[-1] |
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117 if lowercontains(name) or lowercontains(docs): |
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118 # extension docs are already translated |
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119 results['extensions'].append((name, docs.splitlines()[0])) |
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120 for cmd, entry in getattr(mod, 'cmdtable', {}).iteritems(): |
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121 if kw in cmd or (len(entry) > 2 and lowercontains(entry[2])): |
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122 cmdname = cmd.split('|')[0].lstrip('^') |
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123 if entry[0].__doc__: |
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124 cmddoc = gettext(entry[0].__doc__).splitlines()[0] |
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125 else: |
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126 cmddoc = _('(no help text available)') |
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127 results['extensioncommands'].append((cmdname, cmddoc)) |
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128 return results |
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129 |
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130 def loaddoc(topic): |
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131 """Return a delayed loader for help/topic.txt.""" |
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133 def loader(): |
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134 docdir = os.path.join(util.datapath, 'help') |
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135 path = os.path.join(docdir, topic + ".txt") |
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136 doc = gettext(util.readfile(path)) |
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137 for rewriter in helphooks.get(topic, []): |
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138 doc = rewriter(topic, doc) |
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139 return doc |
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140 |
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141 return loader |
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142 |
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143 helptable = sorted([ |
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144 (["config", "hgrc"], _("Configuration Files"), loaddoc('config')), |
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145 (["dates"], _("Date Formats"), loaddoc('dates')), |
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146 (["patterns"], _("File Name Patterns"), loaddoc('patterns')), |
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147 (['environment', 'env'], _('Environment Variables'), |
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148 loaddoc('environment')), |
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149 (['revisions', 'revs'], _('Specifying Single Revisions'), |
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150 loaddoc('revisions')), |
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151 (['multirevs', 'mrevs'], _('Specifying Multiple Revisions'), |
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152 loaddoc('multirevs')), |
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153 (['revsets', 'revset'], _("Specifying Revision Sets"), loaddoc('revsets')), |
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154 (['filesets', 'fileset'], _("Specifying File Sets"), loaddoc('filesets')), |
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155 (['diffs'], _('Diff Formats'), loaddoc('diffs')), |
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156 (['merge-tools', 'mergetools'], _('Merge Tools'), loaddoc('merge-tools')), |
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157 (['templating', 'templates', 'template', 'style'], _('Template Usage'), |
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158 loaddoc('templates')), |
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159 (['urls'], _('URL Paths'), loaddoc('urls')), |
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160 (["extensions"], _("Using Additional Features"), extshelp), |
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161 (["subrepos", "subrepo"], _("Subrepositories"), loaddoc('subrepos')), |
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162 (["hgweb"], _("Configuring hgweb"), loaddoc('hgweb')), |
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163 (["glossary"], _("Glossary"), loaddoc('glossary')), |
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164 (["hgignore", "ignore"], _("Syntax for Mercurial Ignore Files"), |
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165 loaddoc('hgignore')), |
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166 (["phases"], _("Working with Phases"), loaddoc('phases')), |
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167 ]) |
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168 |
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169 # Map topics to lists of callable taking the current topic help and |
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170 # returning the updated version |
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171 helphooks = {} |
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172 |
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173 def addtopichook(topic, rewriter): |
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174 helphooks.setdefault(topic, []).append(rewriter) |
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175 |
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176 def makeitemsdoc(topic, doc, marker, items, dedent=False): |
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177 """Extract docstring from the items key to function mapping, build a |
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178 .single documentation block and use it to overwrite the marker in doc |
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179 """ |
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180 entries = [] |
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181 for name in sorted(items): |
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182 text = (items[name].__doc__ or '').rstrip() |
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183 if not text: |
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184 continue |
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185 text = gettext(text) |
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186 if dedent: |
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187 text = textwrap.dedent(text) |
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188 lines = text.splitlines() |
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189 doclines = [(lines[0])] |
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190 for l in lines[1:]: |
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191 # Stop once we find some Python doctest |
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192 if l.strip().startswith('>>>'): |
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193 break |
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194 if dedent: |
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195 doclines.append(l.rstrip()) |
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196 else: |
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197 doclines.append(' ' + l.strip()) |
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198 entries.append('\n'.join(doclines)) |
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199 entries = '\n\n'.join(entries) |
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200 return doc.replace(marker, entries) |
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201 |
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202 def addtopicsymbols(topic, marker, symbols, dedent=False): |
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203 def add(topic, doc): |
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204 return makeitemsdoc(topic, doc, marker, symbols, dedent=dedent) |
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205 addtopichook(topic, add) |
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206 |
14686 | 207 addtopicsymbols('filesets', '.. predicatesmarker', fileset.symbols) |
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208 addtopicsymbols('merge-tools', '.. internaltoolsmarker', |
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209 filemerge.internalsdoc) |
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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 addtopicsymbols('templates', '.. functionsmarker', templater.funcs) |
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214 addtopicsymbols('hgweb', '.. webcommandsmarker', webcommands.commands, |
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215 dedent=True) |
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216 |
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217 def help_(ui, name, unknowncmd=False, full=True, **opts): |
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218 ''' |
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219 Generate the help for 'name' as unformatted restructured text. If |
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220 'name' is None, describe the commands available. |
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221 ''' |
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222 |
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223 import commands # avoid cycle |
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224 |
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225 def helpcmd(name): |
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226 try: |
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227 aliases, entry = cmdutil.findcmd(name, commands.table, |
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228 strict=unknowncmd) |
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229 except error.AmbiguousCommand, inst: |
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230 # py3k fix: except vars can't be used outside the scope of the |
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231 # except block, nor can be used inside a lambda. python issue4617 |
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232 prefix = inst.args[0] |
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233 select = lambda c: c.lstrip('^').startswith(prefix) |
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234 rst = helplist(select) |
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235 return rst |
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236 |
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237 rst = [] |
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238 |
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239 # check if it's an invalid alias and display its error if it is |
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240 if getattr(entry[0], 'badalias', None): |
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241 rst.append(entry[0].badalias + '\n') |
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242 if entry[0].unknowncmd: |
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243 try: |
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244 rst.extend(helpextcmd(entry[0].cmdname)) |
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245 except error.UnknownCommand: |
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246 pass |
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247 return rst |
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248 |
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249 # synopsis |
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250 if len(entry) > 2: |
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251 if entry[2].startswith('hg'): |
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252 rst.append("%s\n" % entry[2]) |
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253 else: |
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254 rst.append('hg %s %s\n' % (aliases[0], entry[2])) |
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255 else: |
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256 rst.append('hg %s\n' % aliases[0]) |
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257 # aliases |
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258 if full and not ui.quiet and len(aliases) > 1: |
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259 rst.append(_("\naliases: %s\n") % ', '.join(aliases[1:])) |
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260 rst.append('\n') |
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261 |
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262 # description |
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263 doc = gettext(entry[0].__doc__) |
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264 if not doc: |
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265 doc = _("(no help text available)") |
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266 if util.safehasattr(entry[0], 'definition'): # aliased command |
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267 if entry[0].definition.startswith('!'): # shell alias |
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268 doc = _('shell alias for::\n\n %s') % entry[0].definition[1:] |
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269 else: |
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270 doc = _('alias for: hg %s\n\n%s') % (entry[0].definition, doc) |
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271 doc = doc.splitlines(True) |
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272 if ui.quiet or not full: |
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273 rst.append(doc[0]) |
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274 else: |
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275 rst.extend(doc) |
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276 rst.append('\n') |
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277 |
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278 # check if this command shadows a non-trivial (multi-line) |
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279 # extension help text |
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280 try: |
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281 mod = extensions.find(name) |
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282 doc = gettext(mod.__doc__) or '' |
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283 if '\n' in doc.strip(): |
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284 msg = _('(use "hg help -e %s" to show help for ' |
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285 'the %s extension)') % (name, name) |
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286 rst.append('\n%s\n' % msg) |
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287 except KeyError: |
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288 pass |
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289 |
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290 # options |
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291 if not ui.quiet and entry[1]: |
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292 rst.append(optrst(_("options"), entry[1], ui.verbose)) |
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293 |
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294 if ui.verbose: |
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295 rst.append(optrst(_("global options"), |
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296 commands.globalopts, ui.verbose)) |
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297 |
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298 if not ui.verbose: |
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299 if not full: |
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300 rst.append(_('\n(use "hg %s -h" to show more help)\n') |
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301 % name) |
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302 elif not ui.quiet: |
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303 rst.append(_('\n(some details hidden, use --verbose ' |
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304 'to show complete help)')) |
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305 |
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306 return rst |
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307 |
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308 |
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309 def helplist(select=None): |
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310 # list of commands |
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311 if name == "shortlist": |
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312 header = _('basic commands:\n\n') |
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313 elif name == "debug": |
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314 header = _('debug commands (internal and unsupported):\n\n') |
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315 else: |
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316 header = _('list of commands:\n\n') |
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317 |
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318 h = {} |
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319 cmds = {} |
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320 for c, e in commands.table.iteritems(): |
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321 f = c.split("|", 1)[0] |
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322 if select and not select(f): |
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323 continue |
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324 if (not select and name != 'shortlist' and |
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325 e[0].__module__ != commands.__name__): |
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326 continue |
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327 if name == "shortlist" and not f.startswith("^"): |
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328 continue |
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329 f = f.lstrip("^") |
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330 if not ui.debugflag and f.startswith("debug") and name != "debug": |
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331 continue |
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332 doc = e[0].__doc__ |
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333 if doc and 'DEPRECATED' in doc and not ui.verbose: |
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334 continue |
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335 doc = gettext(doc) |
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336 if not doc: |
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337 doc = _("(no help text available)") |
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338 h[f] = doc.splitlines()[0].rstrip() |
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339 cmds[f] = c.lstrip("^") |
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340 |
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341 rst = [] |
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342 if not h: |
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343 if not ui.quiet: |
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344 rst.append(_('no commands defined\n')) |
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345 return rst |
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346 |
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347 if not ui.quiet: |
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348 rst.append(header) |
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349 fns = sorted(h) |
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350 for f in fns: |
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351 if ui.verbose: |
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352 commacmds = cmds[f].replace("|",", ") |
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353 rst.append(" :%s: %s\n" % (commacmds, h[f])) |
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354 else: |
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355 rst.append(' :%s: %s\n' % (f, h[f])) |
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356 |
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357 if not name: |
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358 exts = listexts(_('enabled extensions:'), extensions.enabled()) |
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359 if exts: |
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360 rst.append('\n') |
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361 rst.extend(exts) |
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362 |
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363 rst.append(_("\nadditional help topics:\n\n")) |
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364 topics = [] |
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365 for names, header, doc in helptable: |
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366 topics.append((names[0], header)) |
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367 for t, desc in topics: |
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368 rst.append(" :%s: %s\n" % (t, desc)) |
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369 |
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370 if ui.quiet: |
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371 pass |
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372 elif ui.verbose: |
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373 rst.append('\n%s\n' % optrst(_("global options"), |
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374 commands.globalopts, ui.verbose)) |
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375 if name == 'shortlist': |
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376 rst.append(_('\n(use "hg help" for the full list ' |
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377 'of commands)\n')) |
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378 else: |
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379 if name == 'shortlist': |
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380 rst.append(_('\n(use "hg help" for the full list of commands ' |
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381 'or "hg -v" for details)\n')) |
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382 elif name and not full: |
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383 rst.append(_('\n(use "hg help %s" to show the full help ' |
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384 'text)\n') % name) |
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385 elif name and cmds and name in cmds.keys(): |
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386 rst.append(_('\n(use "hg help -v -e %s" to show built-in ' |
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387 'aliases and global options)\n') % name) |
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388 else: |
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389 rst.append(_('\n(use "hg help -v%s" to show built-in aliases ' |
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390 'and global options)\n') |
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391 % (name and " " + name or "")) |
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392 return rst |
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393 |
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394 def helptopic(name): |
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395 for names, header, doc in helptable: |
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396 if name in names: |
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397 break |
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398 else: |
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399 raise error.UnknownCommand(name) |
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400 |
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401 rst = [minirst.section(header)] |
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402 |
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403 # description |
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404 if not doc: |
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405 rst.append(" %s\n" % _("(no help text available)")) |
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406 if callable(doc): |
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407 rst += [" %s\n" % l for l in doc().splitlines()] |
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408 |
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409 if not ui.verbose: |
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410 omitted = _('(some details hidden, use --verbose' |
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411 ' to show complete help)') |
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412 indicateomitted(rst, omitted) |
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413 |
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414 try: |
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415 cmdutil.findcmd(name, commands.table) |
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416 rst.append(_('\nuse "hg help -c %s" to see help for ' |
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417 'the %s command\n') % (name, name)) |
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418 except error.UnknownCommand: |
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419 pass |
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420 return rst |
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421 |
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422 def helpext(name): |
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423 try: |
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424 mod = extensions.find(name) |
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425 doc = gettext(mod.__doc__) or _('no help text available') |
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426 except KeyError: |
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427 mod = None |
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428 doc = extensions.disabledext(name) |
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429 if not doc: |
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430 raise error.UnknownCommand(name) |
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431 |
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432 if '\n' not in doc: |
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433 head, tail = doc, "" |
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434 else: |
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435 head, tail = doc.split('\n', 1) |
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436 rst = [_('%s extension - %s\n\n') % (name.split('.')[-1], head)] |
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437 if tail: |
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438 rst.extend(tail.splitlines(True)) |
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439 rst.append('\n') |
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440 |
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441 if not ui.verbose: |
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442 omitted = _('(some details hidden, use --verbose' |
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443 ' to show complete help)') |
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444 indicateomitted(rst, omitted) |
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445 |
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446 if mod: |
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447 try: |
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448 ct = mod.cmdtable |
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449 except AttributeError: |
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450 ct = {} |
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451 modcmds = set([c.split('|', 1)[0] for c in ct]) |
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452 rst.extend(helplist(modcmds.__contains__)) |
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453 else: |
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454 rst.append(_('(use "hg help extensions" for information on enabling' |
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455 ' extensions)\n')) |
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456 return rst |
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457 |
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458 def helpextcmd(name): |
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459 cmd, ext, mod = extensions.disabledcmd(ui, name, |
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460 ui.configbool('ui', 'strict')) |
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461 doc = gettext(mod.__doc__).splitlines()[0] |
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462 |
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463 rst = listexts(_("'%s' is provided by the following " |
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464 "extension:") % cmd, {ext: doc}, indent=4) |
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465 rst.append('\n') |
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466 rst.append(_('(use "hg help extensions" for information on enabling ' |
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467 'extensions)\n')) |
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468 return rst |
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469 |
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470 |
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471 rst = [] |
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472 kw = opts.get('keyword') |
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473 if kw: |
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474 matches = topicmatch(kw) |
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475 for t, title in (('topics', _('Topics')), |
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476 ('commands', _('Commands')), |
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477 ('extensions', _('Extensions')), |
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478 ('extensioncommands', _('Extension Commands'))): |
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479 if matches[t]: |
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480 rst.append('%s:\n\n' % title) |
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481 rst.extend(minirst.maketable(sorted(matches[t]), 1)) |
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482 rst.append('\n') |
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483 if not rst: |
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484 msg = _('no matches') |
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485 hint = _('try "hg help" for a list of topics') |
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486 raise util.Abort(msg, hint=hint) |
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487 elif name and name != 'shortlist': |
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488 if unknowncmd: |
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489 queries = (helpextcmd,) |
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490 elif opts.get('extension'): |
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491 queries = (helpext,) |
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492 elif opts.get('command'): |
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493 queries = (helpcmd,) |
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494 else: |
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495 queries = (helptopic, helpcmd, helpext, helpextcmd) |
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496 for f in queries: |
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497 try: |
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498 rst = f(name) |
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499 break |
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500 except error.UnknownCommand: |
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501 pass |
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502 else: |
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503 if unknowncmd: |
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504 raise error.UnknownCommand(name) |
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505 else: |
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506 msg = _('no such help topic: %s') % name |
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507 hint = _('try "hg help --keyword %s"') % name |
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508 raise util.Abort(msg, hint=hint) |
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509 else: |
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510 # program name |
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511 if not ui.quiet: |
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512 rst = [_("Mercurial Distributed SCM\n"), '\n'] |
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513 rst.extend(helplist()) |
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514 |
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515 return ''.join(rst) |