annotate hgext/show.py @ 51630:513597087b89

branching: merge stable into default
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Mon, 10 Jun 2024 12:12:56 +0200
parents 6000f5b25c9b
children
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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
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29 from mercurial.i18n import _
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30 from mercurial.node import nullrev
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31 from mercurial import (
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32 cmdutil,
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33 commands,
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34 destutil,
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35 error,
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36 formatter,
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37 graphmod,
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38 logcmdutil,
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39 phases,
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40 pycompat,
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41 registrar,
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42 revset,
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43 revsetlang,
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44 scmutil,
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45 )
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46
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47 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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48 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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49 # be specifying the version(s) of Mercurial they are tested with, or
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50 # leave the attribute unspecified.
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51 testedwith = b'ships-with-hg-core'
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52
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53 cmdtable = {}
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54 command = registrar.command(cmdtable)
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55
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56 revsetpredicate = registrar.revsetpredicate()
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57
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58
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59 class showcmdfunc(registrar._funcregistrarbase):
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60 """Register a function to be invoked for an `hg show <thing>`."""
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61
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62 # Used by _formatdoc().
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63 _docformat = b'%s -- %s'
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64
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65 def _extrasetup(self, name, func, fmtopic=None, csettopic=None):
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66 """Called with decorator arguments to register a show view.
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67
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68 ``name`` is the sub-command name.
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69
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70 ``func`` is the function being decorated.
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71
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72 ``fmtopic`` is the topic in the style that will be rendered for
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73 this view.
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74
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75 ``csettopic`` is the topic in the style to be used for a changeset
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76 printer.
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77
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78 If ``fmtopic`` is specified, the view function will receive a
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79 formatter instance. If ``csettopic`` is specified, the view
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80 function will receive a changeset printer.
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81 """
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82 func._fmtopic = fmtopic
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83 func._csettopic = csettopic
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84
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85
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86 showview = showcmdfunc()
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87
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88
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89 @command(
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90 b'show',
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91 [
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92 # TODO: Switch this template flag to use cmdutil.formatteropts if
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93 # 'hg show' becomes stable before --template/-T is stable. For now,
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94 # we are putting it here without the '(EXPERIMENTAL)' flag because it
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95 # is an important part of the 'hg show' user experience and the entire
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96 # 'hg show' experience is experimental.
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97 (b'T', b'template', b'', b'display with template', _(b'TEMPLATE')),
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98 ],
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99 _(b'VIEW'),
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100 helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
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101 )
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102 def show(ui, repo, view=None, template=None):
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103 """show various repository information
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104
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105 A requested view of repository data is displayed.
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106
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107 If no view is requested, the list of available views is shown and the
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108 command aborts.
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109
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110 .. note::
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111
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112 There are no backwards compatibility guarantees for the output of this
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113 command. Output may change in any future Mercurial release.
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114
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115 Consumers wanting stable command output should specify a template via
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116 ``-T/--template``.
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117
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118 List of available views:
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119 """
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120 if ui.plain() and not template:
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121 hint = _(b'invoke with -T/--template to control output format')
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122 raise error.Abort(
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123 _(b'must specify a template in plain mode'), hint=hint
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124 )
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125
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126 views = showview._table
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127
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128 if not view:
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129 ui.pager(b'show')
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130 # TODO consider using formatter here so available views can be
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131 # rendered to custom format.
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132 ui.write(_(b'available views:\n'))
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133 ui.write(b'\n')
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134
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135 for name, func in sorted(views.items()):
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136 ui.write(b'%s\n' % pycompat.sysbytes(func.__doc__))
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137
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138 ui.write(b'\n')
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139 raise error.Abort(
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140 _(b'no view requested'),
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141 hint=_(b'use "hg show VIEW" to choose a view'),
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142 )
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143
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144 # TODO use same logic as dispatch to perform prefix matching.
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145 if view not in views:
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146 raise error.Abort(
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147 _(b'unknown view: %s') % view,
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148 hint=_(b'run "hg show" to see available views'),
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149 )
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150
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151 template = template or b'show'
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152
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153 fn = views[view]
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154 ui.pager(b'show')
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155
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156 if fn._fmtopic:
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157 fmtopic = b'show%s' % fn._fmtopic
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158 with ui.formatter(fmtopic, {b'template': template}) as fm:
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159 return fn(ui, repo, fm)
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160 elif fn._csettopic:
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161 ref = b'show%s' % fn._csettopic
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162 spec = formatter.lookuptemplate(ui, ref, template)
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163 displayer = logcmdutil.changesettemplater(ui, repo, spec, buffered=True)
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164 return fn(ui, repo, displayer)
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165 else:
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166 return fn(ui, repo)
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167
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168
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169 @showview(b'bookmarks', fmtopic=b'bookmarks')
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170 def showbookmarks(ui, repo, fm):
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171 """bookmarks and their associated changeset"""
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172 marks = repo._bookmarks
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173 if not len(marks):
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174 # This is a bit hacky. Ideally, templates would have a way to
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175 # specify an empty output, but we shouldn't corrupt JSON while
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176 # waiting for this functionality.
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177 if not isinstance(fm, formatter.jsonformatter):
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178 ui.write(_(b'(no bookmarks set)\n'))
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179 return
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180
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181 revs = [repo[node].rev() for node in marks.values()]
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182 active = repo._activebookmark
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183 longestname = max(len(b) for b in marks)
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184 nodelen = longestshortest(repo, revs)
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185
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186 for bm, node in sorted(marks.items()):
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187 fm.startitem()
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188 fm.context(ctx=repo[node])
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189 fm.write(b'bookmark', b'%s', bm)
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190 fm.write(b'node', fm.hexfunc(node), fm.hexfunc(node))
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191 fm.data(
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192 active=bm == active, longestbookmarklen=longestname, nodelen=nodelen
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193 )
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194
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195
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196 @showview(b'stack', csettopic=b'stack')
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197 def showstack(ui, repo, displayer):
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198 """current line of work"""
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199 wdirctx = repo[b'.']
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200 if wdirctx.rev() == nullrev:
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201 raise error.Abort(
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202 _(
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203 b'stack view only available when there is a '
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204 b'working directory'
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205 )
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206 )
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207
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208 if wdirctx.phase() == phases.public:
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209 ui.write(
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210 _(
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211 b'(empty stack; working directory parent is a published '
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212 b'changeset)\n'
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213 )
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214 )
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215 return
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216
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217 # TODO extract "find stack" into a function to facilitate
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218 # customization and reuse.
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219
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220 baserev = destutil.stackbase(ui, repo)
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221 basectx = None
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222
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223 if baserev is None:
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224 baserev = wdirctx.rev()
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225 stackrevs = {wdirctx.rev()}
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226 else:
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227 stackrevs = set(repo.revs(b'%d::.', baserev))
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228
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229 ctx = repo[baserev]
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230 if ctx.p1().rev() != nullrev:
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231 basectx = ctx.p1()
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232
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233 # And relevant descendants.
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234 branchpointattip = False
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235 cl = repo.changelog
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236
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237 for rev in cl.descendants([wdirctx.rev()]):
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238 ctx = repo[rev]
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239
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240 # Will only happen if . is public.
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241 if ctx.phase() == phases.public:
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242 break
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243
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244 stackrevs.add(ctx.rev())
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245
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246 # ctx.children() within a function iterating on descandants
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247 # potentially has severe performance concerns because revlog.children()
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248 # iterates over all revisions after ctx's node. However, the number of
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249 # draft changesets should be a reasonably small number. So even if
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250 # this is quadratic, the perf impact should be minimal.
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251 if len(ctx.children()) > 1:
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252 branchpointattip = True
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253 break
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diff changeset
254
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diff changeset
255 stackrevs = list(sorted(stackrevs, reverse=True))
33197
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diff changeset
256
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257 # Find likely target heads for the current stack. These are likely
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258 # merge or rebase targets.
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259 if basectx:
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260 # TODO make this customizable?
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261 newheads = set(
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262 repo.revs(
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263 b'heads(%d::) - %ld - not public()', basectx.rev(), stackrevs
43076
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diff changeset
264 )
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diff changeset
265 )
33197
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266 else:
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267 newheads = set()
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268
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Martin von Zweigbergk <martinvonz@google.com>
parents: 40293
diff changeset
269 allrevs = set(stackrevs) | newheads | {baserev}
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270 nodelen = longestshortest(repo, allrevs)
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271
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diff changeset
272 try:
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273 cmdutil.findcmd(b'rebase', commands.table)
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274 haverebase = True
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275 except (error.AmbiguousCommand, error.UnknownCommand):
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276 haverebase = False
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277
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278 # TODO use templating.
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279 # TODO consider using graphmod. But it may not be necessary given
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280 # our simplicity and the customizations required.
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281 # TODO use proper graph symbols from graphmod
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282
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283 tres = formatter.templateresources(ui, repo)
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284 shortesttmpl = formatter.maketemplater(
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285 ui, b'{shortest(node, %d)}' % nodelen, resources=tres
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286 )
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287
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288 def shortest(ctx):
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289 return shortesttmpl.renderdefault({b'ctx': ctx, b'node': ctx.hex()})
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290
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291 # We write out new heads to aid in DAG awareness and to help with decision
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292 # making on how the stack should be reconciled with commits made since the
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293 # branch point.
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294 if newheads:
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295 # Calculate distance from base so we can render the count and so we can
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296 # sort display order by commit distance.
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297 revdistance = {}
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298 for head in newheads:
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299 # There is some redundancy in DAG traversal here and therefore
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300 # room to optimize.
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301 ancestors = cl.ancestors([head], stoprev=basectx.rev())
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302 revdistance[head] = len(list(ancestors))
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303
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304 sourcectx = repo[stackrevs[-1]]
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305
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306 sortedheads = sorted(
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307 newheads, key=lambda x: revdistance[x], reverse=True
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308 )
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309
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310 for i, rev in enumerate(sortedheads):
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311 ctx = repo[rev]
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312
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313 if i:
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314 ui.write(b': ')
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315 else:
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316 ui.write(b' ')
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317
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318 ui.writenoi18n(b'o ')
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319 displayer.show(ctx, nodelen=nodelen)
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320 displayer.flush(ctx)
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321 ui.write(b'\n')
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322
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323 if i:
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324 ui.write(b':/')
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325 else:
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326 ui.write(b' /')
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327
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328 ui.write(b' (')
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329 ui.write(
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330 _(b'%d commits ahead') % revdistance[rev],
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331 label=b'stack.commitdistance',
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332 )
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333
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334 if haverebase:
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335 # TODO may be able to omit --source in some scenarios
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336 ui.write(b'; ')
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337 ui.write(
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338 (
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339 b'hg rebase --source %s --dest %s'
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340 % (shortest(sourcectx), shortest(ctx))
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341 ),
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342 label=b'stack.rebasehint',
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343 )
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344
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345 ui.write(b')\n')
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346
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347 ui.write(b':\n: ')
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348 ui.write(_(b'(stack head)\n'), label=b'stack.label')
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349
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350 if branchpointattip:
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351 ui.write(b' \\ / ')
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352 ui.write(_(b'(multiple children)\n'), label=b'stack.label')
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353 ui.write(b' |\n')
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354
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355 for rev in stackrevs:
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356 ctx = repo[rev]
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357 symbol = b'@' if rev == wdirctx.rev() else b'o'
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358
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359 if newheads:
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360 ui.write(b': ')
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361 else:
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362 ui.write(b' ')
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363
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364 ui.write(symbol, b' ')
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365 displayer.show(ctx, nodelen=nodelen)
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366 displayer.flush(ctx)
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367 ui.write(b'\n')
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368
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369 # TODO display histedit hint?
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370
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371 if basectx:
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372 # Vertically and horizontally separate stack base from parent
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373 # to reinforce stack boundary.
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374 if newheads:
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375 ui.write(b':/ ')
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376 else:
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377 ui.write(b' / ')
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378
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379 ui.write(_(b'(stack base)'), b'\n', label=b'stack.label')
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380 ui.writenoi18n(b'o ')
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381
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382 displayer.show(basectx, nodelen=nodelen)
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383 displayer.flush(basectx)
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384 ui.write(b'\n')
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385
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386
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387 @revsetpredicate(b'_underway([commitage[, headage]])')
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388 def underwayrevset(repo, subset, x):
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389 args = revset.getargsdict(x, b'underway', b'commitage headage')
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390 if b'commitage' not in args:
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391 args[b'commitage'] = None
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392 if b'headage' not in args:
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393 args[b'headage'] = None
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394
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395 # We assume callers of this revset add a topographical sort on the
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396 # result. This means there is no benefit to making the revset lazy
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397 # since the topographical sort needs to consume all revs.
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398 #
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399 # With this in mind, we build up the set manually instead of constructing
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400 # a complex revset. This enables faster execution.
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401
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402 # Mutable changesets (non-public) are the most important changesets
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403 # to return. ``not public()`` will also pull in obsolete changesets if
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404 # there is a non-obsolete changeset with obsolete ancestors. This is
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405 # why we exclude obsolete changesets from this query.
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406 rs = b'not public() and not obsolete()'
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407 rsargs = []
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408 if args[b'commitage']:
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409 rs += b' and date(%s)'
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410 rsargs.append(
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411 revsetlang.getstring(
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412 args[b'commitage'], _(b'commitage requires a string')
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413 )
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414 )
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415
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416 mutable = repo.revs(rs, *rsargs)
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417 relevant = revset.baseset(mutable)
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418
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419 # Add parents of mutable changesets to provide context.
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420 relevant += repo.revs(b'parents(%ld)', mutable)
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421
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422 # We also pull in (public) heads if they a) aren't closing a branch
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423 # b) are recent.
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424 rs = b'head() and not closed()'
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425 rsargs = []
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426 if args[b'headage']:
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427 rs += b' and date(%s)'
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428 rsargs.append(
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429 revsetlang.getstring(
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430 args[b'headage'], _(b'headage requires a string')
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431 )
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432 )
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433
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434 relevant += repo.revs(rs, *rsargs)
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435
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436 # Add working directory parent.
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437 wdirrev = repo[b'.'].rev()
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438 if wdirrev != nullrev:
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439 relevant += revset.baseset({wdirrev})
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440
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441 return subset & relevant
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442
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443
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444 @showview(b'work', csettopic=b'work')
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445 def showwork(ui, repo, displayer):
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446 """changesets that aren't finished"""
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447 # TODO support date-based limiting when calling revset.
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448 revs = repo.revs(b'sort(_underway(), topo)')
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449 nodelen = longestshortest(repo, revs)
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450
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451 revdag = graphmod.dagwalker(repo, revs)
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452
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453 ui.setconfig(b'experimental', b'graphshorten', True)
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454 logcmdutil.displaygraph(
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455 ui,
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456 repo,
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457 revdag,
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458 displayer,
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459 graphmod.asciiedges,
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460 props={b'nodelen': nodelen},
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461 )
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462
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463
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464 def extsetup(ui):
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465 # Alias `hg <prefix><view>` to `hg show <view>`.
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466 for prefix in ui.configlist(b'commands', b'show.aliasprefix'):
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467 for view in showview._table:
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468 name = b'%s%s' % (prefix, view)
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469
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470 choice, allcommands = cmdutil.findpossible(
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471 name, commands.table, strict=True
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472 )
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473
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474 # This alias is already a command name. Don't set it.
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475 if name in choice:
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476 continue
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477
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478 # Same for aliases.
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479 if ui.config(b'alias', name, None):
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480 continue
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481
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482 ui.setconfig(b'alias', name, b'show %s' % view, source=b'show')
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483
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484
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485 def longestshortest(repo, revs, minlen=4):
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486 """Return the length of the longest shortest node to identify revisions.
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487
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488 The result of this function can be used with the ``shortest()`` template
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489 function to ensure that a value is unique and unambiguous for a given
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490 set of nodes.
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491
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492 The number of revisions in the repo is taken into account to prevent
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493 a numeric node prefix from conflicting with an integer revision number.
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494 If we fail to do this, a value of e.g. ``10023`` could mean either
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495 revision 10023 or node ``10023abc...``.
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496 """
35498
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497 if not revs:
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498 return minlen
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499 cl = repo.changelog
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500 return max(
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501 len(scmutil.shortesthexnodeidprefix(repo, cl.node(r), minlen))
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502 for r in revs
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503 )
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504
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505
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parents:
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506 # Adjust the docstring of the show command so it shows all registered views.
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parents:
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507 # This is a bit hacky because it runs at the end of module load. When moved
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parents:
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508 # into core or when another extension wants to provide a view, we'll need
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parents:
diff changeset
509 # to do this more robustly.
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parents:
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510 # TODO make this more robust.
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511 def _updatedocstring():
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512 longest = max(map(len, showview._table.keys()))
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diff changeset
513 entries = []
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514 for key in sorted(showview._table.keys()):
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515 entries.append(
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diff changeset
516 r' %s %s'
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diff changeset
517 % (
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diff changeset
518 pycompat.sysstr(key.ljust(longest)),
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diff changeset
519 showview._table[key]._origdoc,
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diff changeset
520 )
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diff changeset
521 )
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diff changeset
522
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diff changeset
523 cmdtable[b'show'][0].__doc__ = pycompat.sysstr(b'%s\n\n%s\n ') % (
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diff changeset
524 cmdtable[b'show'][0].__doc__.rstrip(),
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diff changeset
525 pycompat.sysstr(b'\n\n').join(entries),
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diff changeset
526 )
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diff changeset
527
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diff changeset
528
3e9f118cc834 show: fix formatting of multiple commands
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diff changeset
529 _updatedocstring()