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annotate hgext/extdiff.py @ 5135:1830bc7676ee

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extdiff: un-nested two functions The functions in extdiff that create temporary repo copies for are useful in other extensions, so the change moves them at the module level.
author Brad Schick <schickb@gmail.com>
date Mon, 06 Aug 2007 14:32:23 -0700
parents eadfaa9ec487
children 841568ccc09d
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1 # extdiff.py - external diff program support for mercurial
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2 #
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3 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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4 #
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7 #
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8 # The `extdiff' Mercurial extension allows you to use external programs
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9 # to compare revisions, or revision with working dir. The external diff
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10 # programs are called with a configurable set of options and two
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11 # non-option arguments: paths to directories containing snapshots of
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12 # files to compare.
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13 #
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14 # To enable this extension:
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15 #
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16 # [extensions]
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17 # hgext.extdiff =
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18 #
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19 # The `extdiff' extension also allows to configure new diff commands, so
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20 # you do not need to type "hg extdiff -p kdiff3" always.
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21 #
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22 # [extdiff]
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23 # # add new command that runs GNU diff(1) in 'context diff' mode
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24 # cmd.cdiff = gdiff
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25 # opts.cdiff = -Nprc5
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27 # # add new command called vdiff, runs kdiff3
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28 # cmd.vdiff = kdiff3
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30 # # add new command called meld, runs meld (no need to name twice)
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31 # cmd.meld =
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32
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33 # # add new command called vimdiff, runs gvimdiff with DirDiff plugin
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34 # #(see http://www.vim.org/scripts/script.php?script_id=102)
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35 # # Non english user, be sure to put "let g:DirDiffDynamicDiffText = 1" in
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36 # # your .vimrc
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37 # cmd.vimdiff = gvim
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38 # opts.vimdiff = -f '+next' '+execute "DirDiff" argv(0) argv(1)'
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39 #
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40 # Each custom diff commands can have two parts: a `cmd' and an `opts'
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41 # part. The cmd.xxx option defines the name of an executable program
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42 # that will be run, and opts.xxx defines a set of command-line options
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43 # which will be inserted to the command between the program name and
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44 # the files/directories to diff (i.e. the cdiff example above).
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45 #
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46 # You can use -I/-X and list of file or directory names like normal
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47 # "hg diff" command. The `extdiff' extension makes snapshots of only
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48 # needed files, so running the external diff program will actually be
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49 # pretty fast (at least faster than having to compare the entire tree).
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50
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51 from mercurial.i18n import _
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52 from mercurial.node import *
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53 from mercurial import cmdutil, util
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54 import os, shutil, tempfile
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55
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56
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57 def snapshot_node(ui, repo, files, node, tmproot):
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58 '''snapshot files as of some revision'''
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59 mf = repo.changectx(node).manifest()
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60 dirname = os.path.basename(repo.root)
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61 if dirname == "":
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62 dirname = "root"
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63 dirname = '%s.%s' % (dirname, short(node))
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64 base = os.path.join(tmproot, dirname)
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65 os.mkdir(base)
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66 if not ui.quiet:
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67 ui.write_err(_('making snapshot of %d files from rev %s\n') %
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68 (len(files), short(node)))
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69 for fn in files:
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70 if not fn in mf:
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71 # skipping new file after a merge ?
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72 continue
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73 wfn = util.pconvert(fn)
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74 ui.note(' %s\n' % wfn)
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75 dest = os.path.join(base, wfn)
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76 destdir = os.path.dirname(dest)
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77 if not os.path.isdir(destdir):
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78 os.makedirs(destdir)
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79 data = repo.wwritedata(wfn, repo.file(wfn).read(mf[wfn]))
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80 open(dest, 'wb').write(data)
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81 return dirname
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82
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83
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84 def snapshot_wdir(ui, repo, files, tmproot):
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85 '''snapshot files from working directory.
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86 if not using snapshot, -I/-X does not work and recursive diff
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87 in tools like kdiff3 and meld displays too many files.'''
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88 dirname = os.path.basename(repo.root)
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89 if dirname == "":
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90 dirname = "root"
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91 base = os.path.join(tmproot, dirname)
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92 os.mkdir(base)
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93 if not ui.quiet:
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94 ui.write_err(_('making snapshot of %d files from working dir\n') %
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95 (len(files)))
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96 for fn in files:
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97 wfn = util.pconvert(fn)
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98 ui.note(' %s\n' % wfn)
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99 dest = os.path.join(base, wfn)
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100 destdir = os.path.dirname(dest)
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101 if not os.path.isdir(destdir):
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102 os.makedirs(destdir)
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103 fp = open(dest, 'wb')
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104 for chunk in util.filechunkiter(repo.wopener(wfn)):
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105 fp.write(chunk)
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106 return dirname
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107
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108
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109 def dodiff(ui, repo, diffcmd, diffopts, pats, opts):
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110 node1, node2 = cmdutil.revpair(repo, opts['rev'])
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111 files, matchfn, anypats = cmdutil.matchpats(repo, pats, opts)
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112 modified, added, removed, deleted, unknown = repo.status(
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113 node1, node2, files, match=matchfn)[:5]
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114 if not (modified or added or removed):
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115 return 0
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116
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117 tmproot = tempfile.mkdtemp(prefix='extdiff.')
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118 try:
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119 dir1 = snapshot_node(ui, repo, modified + removed, node1, tmproot)
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120 if node2:
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121 dir2 = snapshot_node(ui, repo, modified + added, node2, tmproot)
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122 else:
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123 dir2 = snapshot_wdir(ui, repo, modified + added, tmproot)
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124 cmdline = ('%s %s %s %s' %
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125 (util.shellquote(diffcmd), ' '.join(diffopts),
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126 util.shellquote(dir1), util.shellquote(dir2)))
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127 ui.debug('running %r in %s\n' % (cmdline, tmproot))
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128 util.system(cmdline, cwd=tmproot)
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129 return 1
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130 finally:
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131 ui.note(_('cleaning up temp directory\n'))
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132 shutil.rmtree(tmproot)
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133
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134 def extdiff(ui, repo, *pats, **opts):
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135 '''use external program to diff repository (or selected files)
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136
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137 Show differences between revisions for the specified files, using
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138 an external program. The default program used is diff, with
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139 default options "-Npru".
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140
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141 To select a different program, use the -p option. The program
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142 will be passed the names of two directories to compare. To pass
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143 additional options to the program, use the -o option. These will
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144 be passed before the names of the directories to compare.
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145
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146 When two revision arguments are given, then changes are
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147 shown between those revisions. If only one revision is
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148 specified then that revision is compared to the working
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149 directory, and, when no revisions are specified, the
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150 working directory files are compared to its parent.'''
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151 program = opts['program'] or 'diff'
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152 if opts['program']:
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153 option = opts['option']
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154 else:
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155 option = opts['option'] or ['-Npru']
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156 return dodiff(ui, repo, program, option, pats, opts)
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157
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158 cmdtable = {
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159 "extdiff":
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160 (extdiff,
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161 [('p', 'program', '', _('comparison program to run')),
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162 ('o', 'option', [], _('pass option to comparison program')),
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163 ('r', 'rev', [], _('revision')),
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164 ('I', 'include', [], _('include names matching the given patterns')),
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165 ('X', 'exclude', [], _('exclude names matching the given patterns'))],
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166 _('hg extdiff [OPT]... [FILE]...')),
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167 }
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168
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169 def uisetup(ui):
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170 for cmd, path in ui.configitems('extdiff'):
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171 if not cmd.startswith('cmd.'): continue
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172 cmd = cmd[4:]
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173 if not path: path = cmd
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174 diffopts = ui.config('extdiff', 'opts.' + cmd, '')
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175 diffopts = diffopts and [diffopts] or []
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176 def save(cmd, path, diffopts):
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177 '''use closure to save diff command to use'''
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178 def mydiff(ui, repo, *pats, **opts):
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179 return dodiff(ui, repo, path, diffopts, pats, opts)
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180 mydiff.__doc__ = '''use %(path)r to diff repository (or selected files)
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181
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182 Show differences between revisions for the specified
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183 files, using the %(path)r program.
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184
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185 When two revision arguments are given, then changes are
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186 shown between those revisions. If only one revision is
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187 specified then that revision is compared to the working
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188 directory, and, when no revisions are specified, the
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189 working directory files are compared to its parent.''' % {
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190 'path': path,
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191 }
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192 return mydiff
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193 cmdtable[cmd] = (save(cmd, path, diffopts),
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194 cmdtable['extdiff'][1][1:],
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195 _('hg %s [OPTION]... [FILE]...') % cmd)