Mercurial > hg
annotate hgext/show.py @ 48851:d739cd69bb6a
revlog: return 0 for the fast_rank of nullrev
By convention, the rank of the null revision is 0. This particular revision is
never "physically" stored in the changelog, so it is a special case.
For consistency, the value `None` is still being returned for revlogs which do
not store the fast_rank property for any revision.
Differential Revision: https://phab.mercurial-scm.org/D12208
author | pacien <pacien.trangirard@pacien.net> |
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date | Mon, 21 Feb 2022 15:53:03 +0100 |
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() |