Mercurial > hg
annotate hgext/show.py @ 40293:c303d65d2e34
help: assigning categories to existing commands
I'm separating this into its own commit so people can bikeshed over the actual
categorization (vs the support for categories). These categories are based on
the help implementation we've been using internally at Google, and have had
zero complaints.
Differential Revision: https://phab.mercurial-scm.org/D5067
author | rdamazio@google.com |
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date | Sat, 13 Oct 2018 02:17:41 -0700 |
parents | 7b2955624777 |
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1 # show.py - Extension implementing `hg show` |
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2 # |
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3 # Copyright 2017 Gregory Szorc <gregory.szorc@gmail.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 """unified command to show various repository information (EXPERIMENTAL) |
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9 |
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10 This extension provides the :hg:`show` command, which provides a central |
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11 command for displaying commonly-accessed repository data and views of that |
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12 data. |
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13 |
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14 The following config options can influence operation. |
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15 |
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16 ``commands`` |
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17 ------------ |
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18 |
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19 ``show.aliasprefix`` |
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20 List of strings that will register aliases for views. e.g. ``s`` will |
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21 effectively set config options ``alias.s<view> = show <view>`` for all |
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22 views. i.e. `hg swork` would execute `hg show work`. |
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23 |
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24 Aliases that would conflict with existing registrations will not be |
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25 performed. |
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26 """ |
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27 |
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28 from __future__ import absolute_import |
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29 |
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30 from mercurial.i18n import _ |
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31 from mercurial.node import ( |
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32 nullrev, |
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33 ) |
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34 from mercurial import ( |
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35 cmdutil, |
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36 commands, |
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37 destutil, |
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38 error, |
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39 formatter, |
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40 graphmod, |
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41 logcmdutil, |
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42 phases, |
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43 pycompat, |
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44 registrar, |
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45 revset, |
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46 revsetlang, |
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47 scmutil, |
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48 ) |
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49 |
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50 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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51 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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52 # be specifying the version(s) of Mercurial they are tested with, or |
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53 # leave the attribute unspecified. |
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54 testedwith = 'ships-with-hg-core' |
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55 |
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56 cmdtable = {} |
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57 command = registrar.command(cmdtable) |
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58 |
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59 revsetpredicate = registrar.revsetpredicate() |
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60 |
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61 class showcmdfunc(registrar._funcregistrarbase): |
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62 """Register a function to be invoked for an `hg show <thing>`.""" |
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63 |
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64 # Used by _formatdoc(). |
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65 _docformat = '%s -- %s' |
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66 |
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67 def _extrasetup(self, name, func, fmtopic=None, csettopic=None): |
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68 """Called with decorator arguments to register a show view. |
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69 |
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70 ``name`` is the sub-command name. |
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71 |
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72 ``func`` is the function being decorated. |
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73 |
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74 ``fmtopic`` is the topic in the style that will be rendered for |
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75 this view. |
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76 |
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77 ``csettopic`` is the topic in the style to be used for a changeset |
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78 printer. |
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79 |
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80 If ``fmtopic`` is specified, the view function will receive a |
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81 formatter instance. If ``csettopic`` is specified, the view |
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82 function will receive a changeset printer. |
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83 """ |
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84 func._fmtopic = fmtopic |
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85 func._csettopic = csettopic |
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86 |
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87 showview = showcmdfunc() |
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88 |
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89 @command('show', [ |
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90 # TODO: Switch this template flag to use cmdutil.formatteropts if |
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91 # 'hg show' becomes stable before --template/-T is stable. For now, |
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92 # we are putting it here without the '(EXPERIMENTAL)' flag because it |
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93 # is an important part of the 'hg show' user experience and the entire |
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94 # 'hg show' experience is experimental. |
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95 ('T', 'template', '', ('display with template'), _('TEMPLATE')), |
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96 ], _('VIEW'), |
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97 helpcategory=command.CATEGORY_CHANGE_NAVIGATION) |
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98 def show(ui, repo, view=None, template=None): |
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99 """show various repository information |
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100 |
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101 A requested view of repository data is displayed. |
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102 |
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103 If no view is requested, the list of available views is shown and the |
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104 command aborts. |
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105 |
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106 .. note:: |
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107 |
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108 There are no backwards compatibility guarantees for the output of this |
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109 command. Output may change in any future Mercurial release. |
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110 |
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111 Consumers wanting stable command output should specify a template via |
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112 ``-T/--template``. |
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113 |
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114 List of available views: |
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115 """ |
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116 if ui.plain() and not template: |
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117 hint = _('invoke with -T/--template to control output format') |
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118 raise error.Abort(_('must specify a template in plain mode'), hint=hint) |
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119 |
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120 views = showview._table |
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121 |
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122 if not view: |
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123 ui.pager('show') |
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124 # TODO consider using formatter here so available views can be |
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125 # rendered to custom format. |
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126 ui.write(_('available views:\n')) |
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127 ui.write('\n') |
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128 |
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129 for name, func in sorted(views.items()): |
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130 ui.write(('%s\n') % pycompat.sysbytes(func.__doc__)) |
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131 |
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132 ui.write('\n') |
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133 raise error.Abort(_('no view requested'), |
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134 hint=_('use "hg show VIEW" to choose a view')) |
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135 |
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136 # TODO use same logic as dispatch to perform prefix matching. |
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137 if view not in views: |
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138 raise error.Abort(_('unknown view: %s') % view, |
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139 hint=_('run "hg show" to see available views')) |
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140 |
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141 template = template or 'show' |
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142 |
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143 fn = views[view] |
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144 ui.pager('show') |
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145 |
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146 if fn._fmtopic: |
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147 fmtopic = 'show%s' % fn._fmtopic |
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148 with ui.formatter(fmtopic, {'template': template}) as fm: |
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149 return fn(ui, repo, fm) |
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150 elif fn._csettopic: |
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151 ref = 'show%s' % fn._csettopic |
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152 spec = formatter.lookuptemplate(ui, ref, template) |
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153 displayer = logcmdutil.changesettemplater(ui, repo, spec, buffered=True) |
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154 return fn(ui, repo, displayer) |
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155 else: |
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156 return fn(ui, repo) |
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157 |
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158 @showview('bookmarks', fmtopic='bookmarks') |
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159 def showbookmarks(ui, repo, fm): |
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160 """bookmarks and their associated changeset""" |
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161 marks = repo._bookmarks |
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162 if not len(marks): |
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163 # This is a bit hacky. Ideally, templates would have a way to |
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164 # specify an empty output, but we shouldn't corrupt JSON while |
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165 # waiting for this functionality. |
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166 if not isinstance(fm, formatter.jsonformatter): |
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167 ui.write(_('(no bookmarks set)\n')) |
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168 return |
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169 |
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170 revs = [repo[node].rev() for node in marks.values()] |
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171 active = repo._activebookmark |
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172 longestname = max(len(b) for b in marks) |
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173 nodelen = longestshortest(repo, revs) |
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174 |
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175 for bm, node in sorted(marks.items()): |
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176 fm.startitem() |
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177 fm.context(ctx=repo[node]) |
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178 fm.write('bookmark', '%s', bm) |
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179 fm.write('node', fm.hexfunc(node), fm.hexfunc(node)) |
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180 fm.data(active=bm == active, |
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181 longestbookmarklen=longestname, |
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182 nodelen=nodelen) |
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183 |
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184 @showview('stack', csettopic='stack') |
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185 def showstack(ui, repo, displayer): |
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186 """current line of work""" |
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187 wdirctx = repo['.'] |
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188 if wdirctx.rev() == nullrev: |
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189 raise error.Abort(_('stack view only available when there is a ' |
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190 'working directory')) |
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191 |
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192 if wdirctx.phase() == phases.public: |
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193 ui.write(_('(empty stack; working directory parent is a published ' |
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194 'changeset)\n')) |
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195 return |
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196 |
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197 # TODO extract "find stack" into a function to facilitate |
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198 # customization and reuse. |
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199 |
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200 baserev = destutil.stackbase(ui, repo) |
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201 basectx = None |
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202 |
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203 if baserev is None: |
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204 baserev = wdirctx.rev() |
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205 stackrevs = {wdirctx.rev()} |
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206 else: |
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207 stackrevs = set(repo.revs('%d::.', baserev)) |
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208 |
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209 ctx = repo[baserev] |
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210 if ctx.p1().rev() != nullrev: |
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211 basectx = ctx.p1() |
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212 |
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213 # And relevant descendants. |
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214 branchpointattip = False |
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215 cl = repo.changelog |
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216 |
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217 for rev in cl.descendants([wdirctx.rev()]): |
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218 ctx = repo[rev] |
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219 |
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220 # Will only happen if . is public. |
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221 if ctx.phase() == phases.public: |
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222 break |
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223 |
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224 stackrevs.add(ctx.rev()) |
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225 |
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226 # ctx.children() within a function iterating on descandants |
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227 # potentially has severe performance concerns because revlog.children() |
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228 # iterates over all revisions after ctx's node. However, the number of |
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229 # draft changesets should be a reasonably small number. So even if |
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230 # this is quadratic, the perf impact should be minimal. |
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231 if len(ctx.children()) > 1: |
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232 branchpointattip = True |
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233 break |
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234 |
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235 stackrevs = list(sorted(stackrevs, reverse=True)) |
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236 |
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237 # Find likely target heads for the current stack. These are likely |
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238 # merge or rebase targets. |
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239 if basectx: |
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240 # TODO make this customizable? |
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241 newheads = set(repo.revs('heads(%d::) - %ld - not public()', |
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242 basectx.rev(), stackrevs)) |
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243 else: |
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244 newheads = set() |
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245 |
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246 allrevs = set(stackrevs) | newheads | set([baserev]) |
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247 nodelen = longestshortest(repo, allrevs) |
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248 |
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249 try: |
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250 cmdutil.findcmd('rebase', commands.table) |
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251 haverebase = True |
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252 except (error.AmbiguousCommand, error.UnknownCommand): |
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253 haverebase = False |
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254 |
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255 # TODO use templating. |
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256 # TODO consider using graphmod. But it may not be necessary given |
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257 # our simplicity and the customizations required. |
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258 # TODO use proper graph symbols from graphmod |
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259 |
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260 tres = formatter.templateresources(ui, repo) |
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261 shortesttmpl = formatter.maketemplater(ui, '{shortest(node, %d)}' % nodelen, |
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262 resources=tres) |
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263 def shortest(ctx): |
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264 return shortesttmpl.renderdefault({'ctx': ctx, 'node': ctx.hex()}) |
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265 |
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266 # We write out new heads to aid in DAG awareness and to help with decision |
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267 # making on how the stack should be reconciled with commits made since the |
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268 # branch point. |
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269 if newheads: |
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270 # Calculate distance from base so we can render the count and so we can |
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271 # sort display order by commit distance. |
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272 revdistance = {} |
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273 for head in newheads: |
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274 # There is some redundancy in DAG traversal here and therefore |
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275 # room to optimize. |
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276 ancestors = cl.ancestors([head], stoprev=basectx.rev()) |
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277 revdistance[head] = len(list(ancestors)) |
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278 |
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279 sourcectx = repo[stackrevs[-1]] |
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280 |
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281 sortedheads = sorted(newheads, key=lambda x: revdistance[x], |
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282 reverse=True) |
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283 |
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284 for i, rev in enumerate(sortedheads): |
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285 ctx = repo[rev] |
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286 |
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287 if i: |
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288 ui.write(': ') |
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289 else: |
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290 ui.write(' ') |
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291 |
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292 ui.write(('o ')) |
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293 displayer.show(ctx, nodelen=nodelen) |
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294 displayer.flush(ctx) |
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295 ui.write('\n') |
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296 |
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297 if i: |
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298 ui.write(':/') |
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299 else: |
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300 ui.write(' /') |
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301 |
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302 ui.write(' (') |
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303 ui.write(_('%d commits ahead') % revdistance[rev], |
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304 label='stack.commitdistance') |
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305 |
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306 if haverebase: |
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307 # TODO may be able to omit --source in some scenarios |
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308 ui.write('; ') |
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309 ui.write(('hg rebase --source %s --dest %s' % ( |
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310 shortest(sourcectx), shortest(ctx))), |
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311 label='stack.rebasehint') |
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312 |
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313 ui.write(')\n') |
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314 |
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315 ui.write(':\n: ') |
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316 ui.write(_('(stack head)\n'), label='stack.label') |
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317 |
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318 if branchpointattip: |
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319 ui.write(' \\ / ') |
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320 ui.write(_('(multiple children)\n'), label='stack.label') |
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321 ui.write(' |\n') |
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322 |
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323 for rev in stackrevs: |
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324 ctx = repo[rev] |
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325 symbol = '@' if rev == wdirctx.rev() else 'o' |
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326 |
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327 if newheads: |
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328 ui.write(': ') |
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329 else: |
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330 ui.write(' ') |
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331 |
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332 ui.write(symbol, ' ') |
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333 displayer.show(ctx, nodelen=nodelen) |
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334 displayer.flush(ctx) |
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335 ui.write('\n') |
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336 |
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337 # TODO display histedit hint? |
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338 |
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339 if basectx: |
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340 # Vertically and horizontally separate stack base from parent |
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341 # to reinforce stack boundary. |
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342 if newheads: |
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343 ui.write(':/ ') |
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344 else: |
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345 ui.write(' / ') |
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346 |
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347 ui.write(_('(stack base)'), '\n', label='stack.label') |
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348 ui.write(('o ')) |
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349 |
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350 displayer.show(basectx, nodelen=nodelen) |
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351 displayer.flush(basectx) |
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352 ui.write('\n') |
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353 |
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354 @revsetpredicate('_underway([commitage[, headage]])') |
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355 def underwayrevset(repo, subset, x): |
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356 args = revset.getargsdict(x, 'underway', 'commitage headage') |
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357 if 'commitage' not in args: |
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358 args['commitage'] = None |
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359 if 'headage' not in args: |
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360 args['headage'] = None |
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361 |
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362 # We assume callers of this revset add a topographical sort on the |
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363 # result. This means there is no benefit to making the revset lazy |
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364 # since the topographical sort needs to consume all revs. |
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365 # |
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366 # With this in mind, we build up the set manually instead of constructing |
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367 # a complex revset. This enables faster execution. |
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368 |
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369 # Mutable changesets (non-public) are the most important changesets |
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370 # to return. ``not public()`` will also pull in obsolete changesets if |
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371 # there is a non-obsolete changeset with obsolete ancestors. This is |
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372 # why we exclude obsolete changesets from this query. |
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373 rs = 'not public() and not obsolete()' |
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374 rsargs = [] |
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375 if args['commitage']: |
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376 rs += ' and date(%s)' |
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377 rsargs.append(revsetlang.getstring(args['commitage'], |
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378 _('commitage requires a string'))) |
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379 |
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380 mutable = repo.revs(rs, *rsargs) |
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381 relevant = revset.baseset(mutable) |
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382 |
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383 # Add parents of mutable changesets to provide context. |
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384 relevant += repo.revs('parents(%ld)', mutable) |
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385 |
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386 # We also pull in (public) heads if they a) aren't closing a branch |
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387 # b) are recent. |
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388 rs = 'head() and not closed()' |
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389 rsargs = [] |
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390 if args['headage']: |
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391 rs += ' and date(%s)' |
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392 rsargs.append(revsetlang.getstring(args['headage'], |
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393 _('headage requires a string'))) |
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394 |
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395 relevant += repo.revs(rs, *rsargs) |
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396 |
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397 # Add working directory parent. |
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398 wdirrev = repo['.'].rev() |
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399 if wdirrev != nullrev: |
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400 relevant += revset.baseset({wdirrev}) |
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401 |
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402 return subset & relevant |
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403 |
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404 @showview('work', csettopic='work') |
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405 def showwork(ui, repo, displayer): |
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406 """changesets that aren't finished""" |
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407 # TODO support date-based limiting when calling revset. |
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408 revs = repo.revs('sort(_underway(), topo)') |
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409 nodelen = longestshortest(repo, revs) |
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410 |
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411 revdag = graphmod.dagwalker(repo, revs) |
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412 |
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413 ui.setconfig('experimental', 'graphshorten', True) |
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414 logcmdutil.displaygraph(ui, repo, revdag, displayer, graphmod.asciiedges, |
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415 props={'nodelen': nodelen}) |
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416 |
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417 def extsetup(ui): |
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418 # Alias `hg <prefix><view>` to `hg show <view>`. |
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419 for prefix in ui.configlist('commands', 'show.aliasprefix'): |
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420 for view in showview._table: |
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421 name = '%s%s' % (prefix, view) |
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422 |
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423 choice, allcommands = cmdutil.findpossible(name, commands.table, |
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424 strict=True) |
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425 |
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426 # This alias is already a command name. Don't set it. |
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427 if name in choice: |
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428 continue |
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429 |
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430 # Same for aliases. |
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431 if ui.config('alias', name, None): |
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432 continue |
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433 |
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434 ui.setconfig('alias', name, 'show %s' % view, source='show') |
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435 |
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436 def longestshortest(repo, revs, minlen=4): |
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437 """Return the length of the longest shortest node to identify revisions. |
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438 |
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439 The result of this function can be used with the ``shortest()`` template |
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440 function to ensure that a value is unique and unambiguous for a given |
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441 set of nodes. |
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442 |
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443 The number of revisions in the repo is taken into account to prevent |
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444 a numeric node prefix from conflicting with an integer revision number. |
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445 If we fail to do this, a value of e.g. ``10023`` could mean either |
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446 revision 10023 or node ``10023abc...``. |
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447 """ |
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448 if not revs: |
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449 return minlen |
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450 cl = repo.changelog |
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451 return max(len(scmutil.shortesthexnodeidprefix(repo, cl.node(r), minlen)) |
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452 for r in revs) |
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453 |
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454 # Adjust the docstring of the show command so it shows all registered views. |
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455 # This is a bit hacky because it runs at the end of module load. When moved |
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456 # into core or when another extension wants to provide a view, we'll need |
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457 # to do this more robustly. |
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458 # TODO make this more robust. |
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459 def _updatedocstring(): |
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460 longest = max(map(len, showview._table.keys())) |
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461 entries = [] |
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462 for key in sorted(showview._table.keys()): |
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463 entries.append(pycompat.sysstr(' %s %s' % ( |
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464 key.ljust(longest), showview._table[key]._origdoc))) |
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465 |
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466 cmdtable['show'][0].__doc__ = pycompat.sysstr('%s\n\n%s\n ') % ( |
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467 cmdtable['show'][0].__doc__.rstrip(), |
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468 pycompat.sysstr('\n\n').join(entries)) |
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469 |
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470 _updatedocstring() |