Mercurial > hg
annotate hgext/show.py @ 45666:f6811e5bd994
changing-files: add clean computation of changed files for roots
The `files` field is not reliable, so we need to compute things from scratch. We
start with the simplest case root changesets. In the beginning they was nothing,
then user said "let there be files" and there were added files.
Differential Revision: https://phab.mercurial-scm.org/D9126
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Tue, 29 Sep 2020 22:38:08 +0200 |
parents | 86e4daa2d54c |
children | 6000f5b25c9b |
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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 nullrev |
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32 from mercurial import ( |
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33 cmdutil, |
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34 commands, |
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35 destutil, |
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36 error, |
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37 formatter, |
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38 graphmod, |
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39 logcmdutil, |
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40 phases, |
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41 pycompat, |
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42 registrar, |
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43 revset, |
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44 revsetlang, |
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45 scmutil, |
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46 ) |
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47 |
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48 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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49 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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50 # be specifying the version(s) of Mercurial they are tested with, or |
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51 # leave the attribute unspecified. |
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52 testedwith = b'ships-with-hg-core' |
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53 |
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54 cmdtable = {} |
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55 command = registrar.command(cmdtable) |
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56 |
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57 revsetpredicate = registrar.revsetpredicate() |
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58 |
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59 |
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60 class showcmdfunc(registrar._funcregistrarbase): |
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61 """Register a function to be invoked for an `hg show <thing>`.""" |
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62 |
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63 # Used by _formatdoc(). |
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64 _docformat = b'%s -- %s' |
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65 |
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66 def _extrasetup(self, name, func, fmtopic=None, csettopic=None): |
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67 """Called with decorator arguments to register a show view. |
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68 |
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69 ``name`` is the sub-command name. |
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70 |
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71 ``func`` is the function being decorated. |
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72 |
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73 ``fmtopic`` is the topic in the style that will be rendered for |
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74 this view. |
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75 |
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76 ``csettopic`` is the topic in the style to be used for a changeset |
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77 printer. |
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78 |
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79 If ``fmtopic`` is specified, the view function will receive a |
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80 formatter instance. If ``csettopic`` is specified, the view |
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81 function will receive a changeset printer. |
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82 """ |
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83 func._fmtopic = fmtopic |
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84 func._csettopic = csettopic |
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85 |
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86 |
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87 showview = showcmdfunc() |
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88 |
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89 |
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90 @command( |
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91 b'show', |
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92 [ |
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93 # TODO: Switch this template flag to use cmdutil.formatteropts if |
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94 # 'hg show' becomes stable before --template/-T is stable. For now, |
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95 # we are putting it here without the '(EXPERIMENTAL)' flag because it |
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96 # is an important part of the 'hg show' user experience and the entire |
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97 # 'hg show' experience is experimental. |
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98 (b'T', b'template', b'', b'display with template', _(b'TEMPLATE')), |
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99 ], |
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100 _(b'VIEW'), |
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101 helpcategory=command.CATEGORY_CHANGE_NAVIGATION, |
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102 ) |
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103 def show(ui, repo, view=None, template=None): |
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104 """show various repository information |
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105 |
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106 A requested view of repository data is displayed. |
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107 |
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108 If no view is requested, the list of available views is shown and the |
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109 command aborts. |
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110 |
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111 .. note:: |
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112 |
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113 There are no backwards compatibility guarantees for the output of this |
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114 command. Output may change in any future Mercurial release. |
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115 |
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116 Consumers wanting stable command output should specify a template via |
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117 ``-T/--template``. |
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118 |
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119 List of available views: |
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120 """ |
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121 if ui.plain() and not template: |
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122 hint = _(b'invoke with -T/--template to control output format') |
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123 raise error.Abort( |
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124 _(b'must specify a template in plain mode'), hint=hint |
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125 ) |
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126 |
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127 views = showview._table |
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128 |
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129 if not view: |
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130 ui.pager(b'show') |
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131 # TODO consider using formatter here so available views can be |
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132 # rendered to custom format. |
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133 ui.write(_(b'available views:\n')) |
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134 ui.write(b'\n') |
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135 |
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136 for name, func in sorted(views.items()): |
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137 ui.write(b'%s\n' % pycompat.sysbytes(func.__doc__)) |
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138 |
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139 ui.write(b'\n') |
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140 raise error.Abort( |
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141 _(b'no view requested'), |
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142 hint=_(b'use "hg show VIEW" to choose a view'), |
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143 ) |
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144 |
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145 # TODO use same logic as dispatch to perform prefix matching. |
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146 if view not in views: |
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147 raise error.Abort( |
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148 _(b'unknown view: %s') % view, |
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149 hint=_(b'run "hg show" to see available views'), |
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150 ) |
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151 |
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152 template = template or b'show' |
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153 |
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154 fn = views[view] |
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155 ui.pager(b'show') |
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156 |
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157 if fn._fmtopic: |
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158 fmtopic = b'show%s' % fn._fmtopic |
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159 with ui.formatter(fmtopic, {b'template': template}) as fm: |
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160 return fn(ui, repo, fm) |
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161 elif fn._csettopic: |
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162 ref = b'show%s' % fn._csettopic |
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163 spec = formatter.lookuptemplate(ui, ref, template) |
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164 displayer = logcmdutil.changesettemplater(ui, repo, spec, buffered=True) |
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165 return fn(ui, repo, displayer) |
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166 else: |
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167 return fn(ui, repo) |
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168 |
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169 |
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170 @showview(b'bookmarks', fmtopic=b'bookmarks') |
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171 def showbookmarks(ui, repo, fm): |
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172 """bookmarks and their associated changeset""" |
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173 marks = repo._bookmarks |
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174 if not len(marks): |
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175 # This is a bit hacky. Ideally, templates would have a way to |
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176 # specify an empty output, but we shouldn't corrupt JSON while |
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177 # waiting for this functionality. |
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178 if not isinstance(fm, formatter.jsonformatter): |
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179 ui.write(_(b'(no bookmarks set)\n')) |
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180 return |
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181 |
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182 revs = [repo[node].rev() for node in marks.values()] |
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183 active = repo._activebookmark |
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184 longestname = max(len(b) for b in marks) |
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185 nodelen = longestshortest(repo, revs) |
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186 |
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187 for bm, node in sorted(marks.items()): |
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188 fm.startitem() |
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189 fm.context(ctx=repo[node]) |
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190 fm.write(b'bookmark', b'%s', bm) |
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191 fm.write(b'node', fm.hexfunc(node), fm.hexfunc(node)) |
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192 fm.data( |
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193 active=bm == active, longestbookmarklen=longestname, nodelen=nodelen |
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194 ) |
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195 |
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196 |
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197 @showview(b'stack', csettopic=b'stack') |
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198 def showstack(ui, repo, displayer): |
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199 """current line of work""" |
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200 wdirctx = repo[b'.'] |
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201 if wdirctx.rev() == nullrev: |
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202 raise error.Abort( |
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203 _( |
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204 b'stack view only available when there is a ' |
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205 b'working directory' |
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206 ) |
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207 ) |
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208 |
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209 if wdirctx.phase() == phases.public: |
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210 ui.write( |
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211 _( |
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212 b'(empty stack; working directory parent is a published ' |
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213 b'changeset)\n' |
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214 ) |
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215 ) |
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216 return |
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217 |
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218 # TODO extract "find stack" into a function to facilitate |
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219 # customization and reuse. |
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220 |
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221 baserev = destutil.stackbase(ui, repo) |
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222 basectx = None |
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223 |
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224 if baserev is None: |
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225 baserev = wdirctx.rev() |
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226 stackrevs = {wdirctx.rev()} |
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227 else: |
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228 stackrevs = set(repo.revs(b'%d::.', baserev)) |
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229 |
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230 ctx = repo[baserev] |
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231 if ctx.p1().rev() != nullrev: |
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232 basectx = ctx.p1() |
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233 |
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234 # And relevant descendants. |
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235 branchpointattip = False |
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236 cl = repo.changelog |
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237 |
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238 for rev in cl.descendants([wdirctx.rev()]): |
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239 ctx = repo[rev] |
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240 |
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241 # Will only happen if . is public. |
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242 if ctx.phase() == phases.public: |
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243 break |
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244 |
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245 stackrevs.add(ctx.rev()) |
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246 |
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247 # ctx.children() within a function iterating on descandants |
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248 # potentially has severe performance concerns because revlog.children() |
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249 # iterates over all revisions after ctx's node. However, the number of |
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250 # draft changesets should be a reasonably small number. So even if |
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251 # this is quadratic, the perf impact should be minimal. |
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252 if len(ctx.children()) > 1: |
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253 branchpointattip = True |
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254 break |
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255 |
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256 stackrevs = list(sorted(stackrevs, reverse=True)) |
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257 |
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258 # Find likely target heads for the current stack. These are likely |
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259 # merge or rebase targets. |
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260 if basectx: |
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261 # TODO make this customizable? |
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262 newheads = set( |
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263 repo.revs( |
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264 b'heads(%d::) - %ld - not public()', basectx.rev(), stackrevs |
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265 ) |
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266 ) |
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267 else: |
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268 newheads = set() |
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269 |
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270 allrevs = set(stackrevs) | newheads | {baserev} |
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271 nodelen = longestshortest(repo, allrevs) |
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272 |
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273 try: |
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274 cmdutil.findcmd(b'rebase', commands.table) |
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275 haverebase = True |
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276 except (error.AmbiguousCommand, error.UnknownCommand): |
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277 haverebase = False |
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278 |
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279 # TODO use templating. |
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280 # TODO consider using graphmod. But it may not be necessary given |
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281 # our simplicity and the customizations required. |
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282 # TODO use proper graph symbols from graphmod |
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283 |
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284 tres = formatter.templateresources(ui, repo) |
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285 shortesttmpl = formatter.maketemplater( |
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286 ui, b'{shortest(node, %d)}' % nodelen, resources=tres |
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287 ) |
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288 |
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289 def shortest(ctx): |
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290 return shortesttmpl.renderdefault({b'ctx': ctx, b'node': ctx.hex()}) |
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291 |
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292 # We write out new heads to aid in DAG awareness and to help with decision |
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293 # making on how the stack should be reconciled with commits made since the |
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294 # branch point. |
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295 if newheads: |
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296 # Calculate distance from base so we can render the count and so we can |
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297 # sort display order by commit distance. |
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298 revdistance = {} |
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299 for head in newheads: |
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300 # There is some redundancy in DAG traversal here and therefore |
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301 # room to optimize. |
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302 ancestors = cl.ancestors([head], stoprev=basectx.rev()) |
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303 revdistance[head] = len(list(ancestors)) |
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304 |
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305 sourcectx = repo[stackrevs[-1]] |
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306 |
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307 sortedheads = sorted( |
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308 newheads, key=lambda x: revdistance[x], reverse=True |
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309 ) |
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310 |
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311 for i, rev in enumerate(sortedheads): |
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312 ctx = repo[rev] |
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313 |
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314 if i: |
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315 ui.write(b': ') |
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316 else: |
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317 ui.write(b' ') |
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318 |
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319 ui.writenoi18n(b'o ') |
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320 displayer.show(ctx, nodelen=nodelen) |
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321 displayer.flush(ctx) |
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322 ui.write(b'\n') |
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323 |
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324 if i: |
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325 ui.write(b':/') |
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326 else: |
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327 ui.write(b' /') |
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328 |
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329 ui.write(b' (') |
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330 ui.write( |
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331 _(b'%d commits ahead') % revdistance[rev], |
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332 label=b'stack.commitdistance', |
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333 ) |
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334 |
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335 if haverebase: |
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336 # TODO may be able to omit --source in some scenarios |
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337 ui.write(b'; ') |
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338 ui.write( |
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339 ( |
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340 b'hg rebase --source %s --dest %s' |
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341 % (shortest(sourcectx), shortest(ctx)) |
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342 ), |
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343 label=b'stack.rebasehint', |
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344 ) |
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345 |
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346 ui.write(b')\n') |
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347 |
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348 ui.write(b':\n: ') |
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349 ui.write(_(b'(stack head)\n'), label=b'stack.label') |
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350 |
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351 if branchpointattip: |
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352 ui.write(b' \\ / ') |
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353 ui.write(_(b'(multiple children)\n'), label=b'stack.label') |
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354 ui.write(b' |\n') |
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355 |
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356 for rev in stackrevs: |
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357 ctx = repo[rev] |
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358 symbol = b'@' if rev == wdirctx.rev() else b'o' |
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359 |
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360 if newheads: |
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361 ui.write(b': ') |
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362 else: |
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363 ui.write(b' ') |
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364 |
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365 ui.write(symbol, b' ') |
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366 displayer.show(ctx, nodelen=nodelen) |
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367 displayer.flush(ctx) |
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368 ui.write(b'\n') |
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369 |
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370 # TODO display histedit hint? |
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371 |
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372 if basectx: |
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373 # Vertically and horizontally separate stack base from parent |
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374 # to reinforce stack boundary. |
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375 if newheads: |
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376 ui.write(b':/ ') |
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377 else: |
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378 ui.write(b' / ') |
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379 |
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380 ui.write(_(b'(stack base)'), b'\n', label=b'stack.label') |
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381 ui.writenoi18n(b'o ') |
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382 |
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383 displayer.show(basectx, nodelen=nodelen) |
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384 displayer.flush(basectx) |
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385 ui.write(b'\n') |
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386 |
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387 |
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388 @revsetpredicate(b'_underway([commitage[, headage]])') |
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389 def underwayrevset(repo, subset, x): |
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390 args = revset.getargsdict(x, b'underway', b'commitage headage') |
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391 if b'commitage' not in args: |
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392 args[b'commitage'] = None |
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393 if b'headage' not in args: |
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394 args[b'headage'] = None |
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395 |
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396 # We assume callers of this revset add a topographical sort on the |
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397 # result. This means there is no benefit to making the revset lazy |
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398 # since the topographical sort needs to consume all revs. |
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399 # |
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400 # With this in mind, we build up the set manually instead of constructing |
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401 # a complex revset. This enables faster execution. |
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402 |
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403 # Mutable changesets (non-public) are the most important changesets |
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404 # to return. ``not public()`` will also pull in obsolete changesets if |
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405 # there is a non-obsolete changeset with obsolete ancestors. This is |
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406 # why we exclude obsolete changesets from this query. |
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407 rs = b'not public() and not obsolete()' |
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408 rsargs = [] |
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409 if args[b'commitage']: |
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410 rs += b' and date(%s)' |
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411 rsargs.append( |
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412 revsetlang.getstring( |
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413 args[b'commitage'], _(b'commitage requires a string') |
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414 ) |
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415 ) |
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416 |
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417 mutable = repo.revs(rs, *rsargs) |
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418 relevant = revset.baseset(mutable) |
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419 |
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420 # Add parents of mutable changesets to provide context. |
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421 relevant += repo.revs(b'parents(%ld)', mutable) |
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422 |
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423 # We also pull in (public) heads if they a) aren't closing a branch |
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424 # b) are recent. |
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425 rs = b'head() and not closed()' |
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426 rsargs = [] |
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427 if args[b'headage']: |
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428 rs += b' and date(%s)' |
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429 rsargs.append( |
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430 revsetlang.getstring( |
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431 args[b'headage'], _(b'headage requires a string') |
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432 ) |
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433 ) |
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434 |
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435 relevant += repo.revs(rs, *rsargs) |
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436 |
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437 # Add working directory parent. |
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438 wdirrev = repo[b'.'].rev() |
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439 if wdirrev != nullrev: |
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440 relevant += revset.baseset({wdirrev}) |
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441 |
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442 return subset & relevant |
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443 |
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444 |
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445 @showview(b'work', csettopic=b'work') |
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446 def showwork(ui, repo, displayer): |
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447 """changesets that aren't finished""" |
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448 # TODO support date-based limiting when calling revset. |
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449 revs = repo.revs(b'sort(_underway(), topo)') |
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450 nodelen = longestshortest(repo, revs) |
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451 |
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452 revdag = graphmod.dagwalker(repo, revs) |
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453 |
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454 ui.setconfig(b'experimental', b'graphshorten', True) |
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455 logcmdutil.displaygraph( |
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456 ui, |
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457 repo, |
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458 revdag, |
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459 displayer, |
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460 graphmod.asciiedges, |
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461 props={b'nodelen': nodelen}, |
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462 ) |
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463 |
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464 |
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465 def extsetup(ui): |
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466 # Alias `hg <prefix><view>` to `hg show <view>`. |
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467 for prefix in ui.configlist(b'commands', b'show.aliasprefix'): |
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468 for view in showview._table: |
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469 name = b'%s%s' % (prefix, view) |
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470 |
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471 choice, allcommands = cmdutil.findpossible( |
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472 name, commands.table, strict=True |
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473 ) |
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474 |
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475 # This alias is already a command name. Don't set it. |
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476 if name in choice: |
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477 continue |
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478 |
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479 # Same for aliases. |
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480 if ui.config(b'alias', name, None): |
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481 continue |
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482 |
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483 ui.setconfig(b'alias', name, b'show %s' % view, source=b'show') |
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484 |
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485 |
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486 def longestshortest(repo, revs, minlen=4): |
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487 """Return the length of the longest shortest node to identify revisions. |
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488 |
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489 The result of this function can be used with the ``shortest()`` template |
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490 function to ensure that a value is unique and unambiguous for a given |
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491 set of nodes. |
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492 |
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493 The number of revisions in the repo is taken into account to prevent |
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494 a numeric node prefix from conflicting with an integer revision number. |
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495 If we fail to do this, a value of e.g. ``10023`` could mean either |
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496 revision 10023 or node ``10023abc...``. |
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497 """ |
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498 if not revs: |
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499 return minlen |
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500 cl = repo.changelog |
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501 return max( |
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502 len(scmutil.shortesthexnodeidprefix(repo, cl.node(r), minlen)) |
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503 for r in revs |
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504 ) |
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505 |
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506 |
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507 # Adjust the docstring of the show command so it shows all registered views. |
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508 # This is a bit hacky because it runs at the end of module load. When moved |
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509 # into core or when another extension wants to provide a view, we'll need |
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510 # to do this more robustly. |
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511 # TODO make this more robust. |
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512 def _updatedocstring(): |
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513 longest = max(map(len, showview._table.keys())) |
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514 entries = [] |
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515 for key in sorted(showview._table.keys()): |
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516 entries.append( |
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517 r' %s %s' |
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518 % ( |
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519 pycompat.sysstr(key.ljust(longest)), |
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520 showview._table[key]._origdoc, |
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521 ) |
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522 ) |
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523 |
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524 cmdtable[b'show'][0].__doc__ = pycompat.sysstr(b'%s\n\n%s\n ') % ( |
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525 cmdtable[b'show'][0].__doc__.rstrip(), |
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526 pycompat.sysstr(b'\n\n').join(entries), |
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527 ) |
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528 |
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529 |
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530 _updatedocstring() |