Mercurial > hg
annotate hgext/show.py @ 36473:ab5f18a9dcac
py3: slice over bytes or use startswith() to prevent getting ascii values
Differential Revision: https://phab.mercurial-scm.org/D2496
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Wed, 28 Feb 2018 19:54:10 +0530 |
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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 hex, |
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33 nullrev, |
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34 ) |
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35 from mercurial import ( |
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36 cmdutil, |
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37 commands, |
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38 destutil, |
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39 error, |
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40 formatter, |
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41 graphmod, |
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42 logcmdutil, |
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43 phases, |
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44 pycompat, |
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45 registrar, |
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46 revset, |
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47 revsetlang, |
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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 def show(ui, repo, view=None, template=None): |
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98 """show various repository information |
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99 |
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100 A requested view of repository data is displayed. |
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101 |
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102 If no view is requested, the list of available views is shown and the |
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103 command aborts. |
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104 |
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105 .. note:: |
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106 |
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107 There are no backwards compatibility guarantees for the output of this |
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108 command. Output may change in any future Mercurial release. |
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109 |
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110 Consumers wanting stable command output should specify a template via |
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111 ``-T/--template``. |
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112 |
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113 List of available views: |
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114 """ |
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115 if ui.plain() and not template: |
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116 hint = _('invoke with -T/--template to control output format') |
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117 raise error.Abort(_('must specify a template in plain mode'), hint=hint) |
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118 |
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119 views = showview._table |
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120 |
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121 if not view: |
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122 ui.pager('show') |
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123 # TODO consider using formatter here so available views can be |
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124 # rendered to custom format. |
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125 ui.write(_('available views:\n')) |
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126 ui.write('\n') |
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127 |
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128 for name, func in sorted(views.items()): |
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129 ui.write(('%s\n') % pycompat.sysbytes(func.__doc__)) |
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130 |
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131 ui.write('\n') |
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132 raise error.Abort(_('no view requested'), |
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133 hint=_('use "hg show VIEW" to choose a view')) |
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134 |
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135 # TODO use same logic as dispatch to perform prefix matching. |
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136 if view not in views: |
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137 raise error.Abort(_('unknown view: %s') % view, |
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138 hint=_('run "hg show" to see available views')) |
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139 |
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140 template = template or 'show' |
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141 |
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142 fn = views[view] |
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143 ui.pager('show') |
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144 |
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145 if fn._fmtopic: |
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146 fmtopic = 'show%s' % fn._fmtopic |
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147 with ui.formatter(fmtopic, {'template': template}) as fm: |
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148 return fn(ui, repo, fm) |
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149 elif fn._csettopic: |
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150 ref = 'show%s' % fn._csettopic |
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151 spec = formatter.lookuptemplate(ui, ref, template) |
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152 displayer = logcmdutil.changesettemplater(ui, repo, spec, buffered=True) |
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153 return fn(ui, repo, displayer) |
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154 else: |
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155 return fn(ui, repo) |
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156 |
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157 @showview('bookmarks', fmtopic='bookmarks') |
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158 def showbookmarks(ui, repo, fm): |
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159 """bookmarks and their associated changeset""" |
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160 marks = repo._bookmarks |
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161 if not len(marks): |
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162 # This is a bit hacky. Ideally, templates would have a way to |
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163 # specify an empty output, but we shouldn't corrupt JSON while |
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164 # waiting for this functionality. |
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165 if not isinstance(fm, formatter.jsonformatter): |
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166 ui.write(_('(no bookmarks set)\n')) |
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167 return |
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168 |
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169 revs = [repo[node].rev() for node in marks.values()] |
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170 active = repo._activebookmark |
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171 longestname = max(len(b) for b in marks) |
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172 nodelen = longestshortest(repo, revs) |
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173 |
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174 for bm, node in sorted(marks.items()): |
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175 fm.startitem() |
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176 fm.context(ctx=repo[node]) |
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177 fm.write('bookmark', '%s', bm) |
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178 fm.write('node', fm.hexfunc(node), fm.hexfunc(node)) |
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179 fm.data(active=bm == active, |
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180 longestbookmarklen=longestname, |
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181 nodelen=nodelen) |
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182 |
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183 @showview('stack', csettopic='stack') |
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184 def showstack(ui, repo, displayer): |
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185 """current line of work""" |
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186 wdirctx = repo['.'] |
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187 if wdirctx.rev() == nullrev: |
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188 raise error.Abort(_('stack view only available when there is a ' |
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189 'working directory')) |
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190 |
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191 if wdirctx.phase() == phases.public: |
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192 ui.write(_('(empty stack; working directory parent is a published ' |
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193 'changeset)\n')) |
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194 return |
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195 |
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196 # TODO extract "find stack" into a function to facilitate |
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197 # customization and reuse. |
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198 |
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199 baserev = destutil.stackbase(ui, repo) |
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200 basectx = None |
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201 |
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202 if baserev is None: |
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203 baserev = wdirctx.rev() |
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204 stackrevs = {wdirctx.rev()} |
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205 else: |
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206 stackrevs = set(repo.revs('%d::.', baserev)) |
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207 |
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208 ctx = repo[baserev] |
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209 if ctx.p1().rev() != nullrev: |
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210 basectx = ctx.p1() |
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211 |
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212 # And relevant descendants. |
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213 branchpointattip = False |
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214 cl = repo.changelog |
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215 |
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216 for rev in cl.descendants([wdirctx.rev()]): |
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217 ctx = repo[rev] |
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218 |
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219 # Will only happen if . is public. |
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220 if ctx.phase() == phases.public: |
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221 break |
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222 |
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223 stackrevs.add(ctx.rev()) |
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224 |
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225 # ctx.children() within a function iterating on descandants |
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226 # potentially has severe performance concerns because revlog.children() |
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227 # iterates over all revisions after ctx's node. However, the number of |
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228 # draft changesets should be a reasonably small number. So even if |
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229 # this is quadratic, the perf impact should be minimal. |
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230 if len(ctx.children()) > 1: |
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231 branchpointattip = True |
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232 break |
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233 |
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234 stackrevs = list(sorted(stackrevs, reverse=True)) |
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235 |
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236 # Find likely target heads for the current stack. These are likely |
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237 # merge or rebase targets. |
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238 if basectx: |
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239 # TODO make this customizable? |
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240 newheads = set(repo.revs('heads(%d::) - %ld - not public()', |
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241 basectx.rev(), stackrevs)) |
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242 else: |
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243 newheads = set() |
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244 |
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245 allrevs = set(stackrevs) | newheads | set([baserev]) |
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246 nodelen = longestshortest(repo, allrevs) |
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247 |
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248 try: |
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249 cmdutil.findcmd('rebase', commands.table) |
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250 haverebase = True |
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251 except (error.AmbiguousCommand, error.UnknownCommand): |
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252 haverebase = False |
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253 |
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254 # TODO use templating. |
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255 # TODO consider using graphmod. But it may not be necessary given |
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256 # our simplicity and the customizations required. |
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257 # TODO use proper graph symbols from graphmod |
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258 |
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259 tres = formatter.templateresources(ui, repo) |
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260 shortesttmpl = formatter.maketemplater(ui, '{shortest(node, %d)}' % nodelen, |
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261 resources=tres) |
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262 def shortest(ctx): |
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263 return shortesttmpl.render({'ctx': ctx, 'node': ctx.hex()}) |
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264 |
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265 # We write out new heads to aid in DAG awareness and to help with decision |
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266 # making on how the stack should be reconciled with commits made since the |
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267 # branch point. |
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268 if newheads: |
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269 # Calculate distance from base so we can render the count and so we can |
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270 # sort display order by commit distance. |
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271 revdistance = {} |
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272 for head in newheads: |
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273 # There is some redundancy in DAG traversal here and therefore |
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274 # room to optimize. |
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275 ancestors = cl.ancestors([head], stoprev=basectx.rev()) |
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276 revdistance[head] = len(list(ancestors)) |
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277 |
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278 sourcectx = repo[stackrevs[-1]] |
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279 |
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280 sortedheads = sorted(newheads, key=lambda x: revdistance[x], |
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281 reverse=True) |
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282 |
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283 for i, rev in enumerate(sortedheads): |
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284 ctx = repo[rev] |
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285 |
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286 if i: |
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287 ui.write(': ') |
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288 else: |
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289 ui.write(' ') |
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290 |
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291 ui.write(('o ')) |
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292 displayer.show(ctx, nodelen=nodelen) |
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293 displayer.flush(ctx) |
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294 ui.write('\n') |
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295 |
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296 if i: |
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297 ui.write(':/') |
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298 else: |
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299 ui.write(' /') |
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300 |
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301 ui.write(' (') |
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302 ui.write(_('%d commits ahead') % revdistance[rev], |
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303 label='stack.commitdistance') |
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304 |
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305 if haverebase: |
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306 # TODO may be able to omit --source in some scenarios |
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307 ui.write('; ') |
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308 ui.write(('hg rebase --source %s --dest %s' % ( |
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309 shortest(sourcectx), shortest(ctx))), |
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310 label='stack.rebasehint') |
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311 |
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312 ui.write(')\n') |
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313 |
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314 ui.write(':\n: ') |
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315 ui.write(_('(stack head)\n'), label='stack.label') |
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316 |
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317 if branchpointattip: |
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318 ui.write(' \\ / ') |
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319 ui.write(_('(multiple children)\n'), label='stack.label') |
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320 ui.write(' |\n') |
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321 |
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322 for rev in stackrevs: |
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323 ctx = repo[rev] |
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324 symbol = '@' if rev == wdirctx.rev() else 'o' |
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325 |
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326 if newheads: |
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327 ui.write(': ') |
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328 else: |
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329 ui.write(' ') |
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330 |
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331 ui.write(symbol, ' ') |
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332 displayer.show(ctx, nodelen=nodelen) |
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333 displayer.flush(ctx) |
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334 ui.write('\n') |
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335 |
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336 # TODO display histedit hint? |
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337 |
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338 if basectx: |
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339 # Vertically and horizontally separate stack base from parent |
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340 # to reinforce stack boundary. |
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341 if newheads: |
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342 ui.write(':/ ') |
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343 else: |
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344 ui.write(' / ') |
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345 |
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346 ui.write(_('(stack base)'), '\n', label='stack.label') |
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347 ui.write(('o ')) |
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348 |
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349 displayer.show(basectx, nodelen=nodelen) |
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350 displayer.flush(basectx) |
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351 ui.write('\n') |
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352 |
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353 @revsetpredicate('_underway([commitage[, headage]])') |
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354 def underwayrevset(repo, subset, x): |
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355 args = revset.getargsdict(x, 'underway', 'commitage headage') |
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356 if 'commitage' not in args: |
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357 args['commitage'] = None |
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358 if 'headage' not in args: |
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359 args['headage'] = None |
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360 |
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361 # We assume callers of this revset add a topographical sort on the |
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362 # result. This means there is no benefit to making the revset lazy |
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363 # since the topographical sort needs to consume all revs. |
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364 # |
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365 # With this in mind, we build up the set manually instead of constructing |
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366 # a complex revset. This enables faster execution. |
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367 |
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368 # Mutable changesets (non-public) are the most important changesets |
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369 # to return. ``not public()`` will also pull in obsolete changesets if |
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370 # there is a non-obsolete changeset with obsolete ancestors. This is |
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371 # why we exclude obsolete changesets from this query. |
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372 rs = 'not public() and not obsolete()' |
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373 rsargs = [] |
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374 if args['commitage']: |
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375 rs += ' and date(%s)' |
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376 rsargs.append(revsetlang.getstring(args['commitage'], |
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377 _('commitage requires a string'))) |
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378 |
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379 mutable = repo.revs(rs, *rsargs) |
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380 relevant = revset.baseset(mutable) |
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381 |
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382 # Add parents of mutable changesets to provide context. |
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383 relevant += repo.revs('parents(%ld)', mutable) |
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384 |
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385 # We also pull in (public) heads if they a) aren't closing a branch |
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386 # b) are recent. |
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387 rs = 'head() and not closed()' |
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388 rsargs = [] |
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389 if args['headage']: |
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390 rs += ' and date(%s)' |
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391 rsargs.append(revsetlang.getstring(args['headage'], |
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392 _('headage requires a string'))) |
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393 |
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394 relevant += repo.revs(rs, *rsargs) |
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395 |
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396 # Add working directory parent. |
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397 wdirrev = repo['.'].rev() |
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398 if wdirrev != nullrev: |
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399 relevant += revset.baseset({wdirrev}) |
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400 |
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401 return subset & relevant |
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402 |
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403 @showview('work', csettopic='work') |
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404 def showwork(ui, repo, displayer): |
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405 """changesets that aren't finished""" |
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406 # TODO support date-based limiting when calling revset. |
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407 revs = repo.revs('sort(_underway(), topo)') |
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408 nodelen = longestshortest(repo, revs) |
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409 |
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410 revdag = graphmod.dagwalker(repo, revs) |
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411 |
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412 ui.setconfig('experimental', 'graphshorten', True) |
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413 logcmdutil.displaygraph(ui, repo, revdag, displayer, graphmod.asciiedges, |
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414 props={'nodelen': nodelen}) |
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415 |
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416 def extsetup(ui): |
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417 # Alias `hg <prefix><view>` to `hg show <view>`. |
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418 for prefix in ui.configlist('commands', 'show.aliasprefix'): |
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419 for view in showview._table: |
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420 name = '%s%s' % (prefix, view) |
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421 |
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422 choice, allcommands = cmdutil.findpossible(name, commands.table, |
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423 strict=True) |
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424 |
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425 # This alias is already a command name. Don't set it. |
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426 if name in choice: |
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427 continue |
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428 |
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429 # Same for aliases. |
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430 if ui.config('alias', name): |
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431 continue |
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432 |
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433 ui.setconfig('alias', name, 'show %s' % view, source='show') |
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434 |
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435 def longestshortest(repo, revs, minlen=4): |
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436 """Return the length of the longest shortest node to identify revisions. |
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437 |
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438 The result of this function can be used with the ``shortest()`` template |
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439 function to ensure that a value is unique and unambiguous for a given |
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440 set of nodes. |
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441 |
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442 The number of revisions in the repo is taken into account to prevent |
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443 a numeric node prefix from conflicting with an integer revision number. |
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444 If we fail to do this, a value of e.g. ``10023`` could mean either |
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445 revision 10023 or node ``10023abc...``. |
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446 """ |
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447 if not revs: |
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448 return minlen |
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449 # don't use filtered repo because it's slow. see templater.shortest(). |
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450 cl = repo.unfiltered().changelog |
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451 return max(len(cl.shortest(hex(cl.node(r)), minlen)) for r in revs) |
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452 |
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453 # Adjust the docstring of the show command so it shows all registered views. |
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454 # This is a bit hacky because it runs at the end of module load. When moved |
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455 # into core or when another extension wants to provide a view, we'll need |
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456 # to do this more robustly. |
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457 # TODO make this more robust. |
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458 def _updatedocstring(): |
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459 longest = max(map(len, showview._table.keys())) |
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460 entries = [] |
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461 for key in sorted(showview._table.keys()): |
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462 entries.append(pycompat.sysstr(' %s %s' % ( |
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463 key.ljust(longest), showview._table[key]._origdoc))) |
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464 |
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465 cmdtable['show'][0].__doc__ = pycompat.sysstr('%s\n\n%s\n ') % ( |
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466 cmdtable['show'][0].__doc__.rstrip(), |
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467 pycompat.sysstr('\n\n').join(entries)) |
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468 |
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469 _updatedocstring() |