Mercurial > hg
annotate hgext/show.py @ 42057:566daffc607d
cleanup: use set literals where possible
Differential Revision: https://phab.mercurial-scm.org/D6192
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Wed, 03 Apr 2019 11:21:27 -0700 |
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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 | {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() |