annotate hgext/extdiff.py @ 8025:1280934dd2dd

patchbomb: Support initial in-reply-to header This allows follow-up/revised patches to appear properly threaded in mail readers and in the archives, reducing noise.
author Henrik Stuart <henrik.stuart at edlund.dk>
date Wed, 08 Apr 2009 19:32:16 +0200
parents cdb848e8c4b5
children 683d8ebcf434
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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 '''
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9 The `extdiff' Mercurial extension allows you to use external programs
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10 to compare revisions, or revision with working dir. The external diff
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11 programs are called with a configurable set of options and two
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12 non-option arguments: paths to directories containing snapshots of
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13 files to compare.
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14
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15 To enable this extension:
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16
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17 [extensions]
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18 hgext.extdiff =
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19
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20 The `extdiff' extension also allows to configure new diff commands, so
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21 you do not need to type "hg extdiff -p kdiff3" always.
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22
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23 [extdiff]
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24 # add new command that runs GNU diff(1) in 'context diff' mode
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25 cdiff = gdiff -Nprc5
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26 ## or the old way:
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27 #cmd.cdiff = gdiff
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28 #opts.cdiff = -Nprc5
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29
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30 # add new command called vdiff, runs kdiff3
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31 vdiff = kdiff3
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32
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33 # add new command called meld, runs meld (no need to name twice)
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34 meld =
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35
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36 # add new command called vimdiff, runs gvimdiff with DirDiff plugin
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37 # (see http://www.vim.org/scripts/script.php?script_id=102)
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38 # Non english user, be sure to put "let g:DirDiffDynamicDiffText = 1" in
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39 # your .vimrc
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40 vimdiff = gvim -f '+next' '+execute "DirDiff" argv(0) argv(1)'
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41
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42 You can use -I/-X and list of file or directory names like normal "hg
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43 diff" command. The `extdiff' extension makes snapshots of only needed
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44 files, so running the external diff program will actually be pretty
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45 fast (at least faster than having to compare the entire tree).
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46 '''
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47
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48 from mercurial.i18n import _
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49 from mercurial.node import short
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50 from mercurial import cmdutil, util, commands
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51 import os, shlex, shutil, tempfile
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52
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53 def snapshot_node(ui, repo, files, node, tmproot):
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54 '''snapshot files as of some revision'''
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55 dirname = os.path.basename(repo.root)
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56 if dirname == "":
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57 dirname = "root"
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58 dirname = '%s.%s' % (dirname, short(node))
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59 base = os.path.join(tmproot, dirname)
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60 os.mkdir(base)
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61 ui.note(_('making snapshot of %d files from rev %s\n') %
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62 (len(files), short(node)))
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63 ctx = repo[node]
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64 for fn in files:
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65 wfn = util.pconvert(fn)
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66 if not wfn in ctx:
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67 # skipping new file after a merge ?
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68 continue
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69 ui.note(' %s\n' % wfn)
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70 dest = os.path.join(base, wfn)
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71 destdir = os.path.dirname(dest)
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72 if not os.path.isdir(destdir):
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73 os.makedirs(destdir)
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74 data = repo.wwritedata(wfn, ctx[wfn].data())
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75 open(dest, 'wb').write(data)
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76 return dirname
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77
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78
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79 def snapshot_wdir(ui, repo, files, tmproot):
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80 '''snapshot files from working directory.
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81 if not using snapshot, -I/-X does not work and recursive diff
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82 in tools like kdiff3 and meld displays too many files.'''
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83 dirname = os.path.basename(repo.root)
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84 if dirname == "":
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85 dirname = "root"
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86 base = os.path.join(tmproot, dirname)
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87 os.mkdir(base)
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88 ui.note(_('making snapshot of %d files from working dir\n') %
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89 (len(files)))
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90
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91 fns_and_mtime = []
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92
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93 for fn in files:
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94 wfn = util.pconvert(fn)
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95 ui.note(' %s\n' % wfn)
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96 dest = os.path.join(base, wfn)
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97 destdir = os.path.dirname(dest)
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98 if not os.path.isdir(destdir):
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99 os.makedirs(destdir)
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100
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101 fp = open(dest, 'wb')
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102 for chunk in util.filechunkiter(repo.wopener(wfn)):
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103 fp.write(chunk)
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104 fp.close()
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105
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106 fns_and_mtime.append((dest, repo.wjoin(fn), os.path.getmtime(dest)))
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107
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108
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109 return dirname, fns_and_mtime
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110
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111
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112 def dodiff(ui, repo, diffcmd, diffopts, pats, opts):
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113 '''Do the actuall diff:
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114
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115 - copy to a temp structure if diffing 2 internal revisions
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116 - copy to a temp structure if diffing working revision with
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117 another one and more than 1 file is changed
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118 - just invoke the diff for a single file in the working dir
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119 '''
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120
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121 revs = opts.get('rev')
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122 change = opts.get('change')
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123
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124 if revs and change:
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125 msg = _('cannot specify --rev and --change at the same time')
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126 raise util.Abort(msg)
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127 elif change:
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128 node2 = repo.lookup(change)
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129 node1 = repo[node2].parents()[0].node()
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130 else:
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131 node1, node2 = cmdutil.revpair(repo, revs)
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132
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133 matcher = cmdutil.match(repo, pats, opts)
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134 modified, added, removed = repo.status(node1, node2, matcher)[:3]
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135 if not (modified or added or removed):
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136 return 0
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137
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138 tmproot = tempfile.mkdtemp(prefix='extdiff.')
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139 dir2root = ''
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140 try:
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141 # Always make a copy of node1
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142 dir1 = snapshot_node(ui, repo, modified + removed, node1, tmproot)
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143 changes = len(modified) + len(removed) + len(added)
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144
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145 fns_and_mtime = []
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146
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147 # If node2 in not the wc or there is >1 change, copy it
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148 if node2:
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149 dir2 = snapshot_node(ui, repo, modified + added, node2, tmproot)
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150 elif changes > 1:
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151 #we only actually need to get the files to copy back to the working
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152 #dir in this case (because the other cases are: diffing 2 revisions
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153 #or single file -- in which case the file is already directly passed
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154 #to the diff tool).
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155 dir2, fns_and_mtime = snapshot_wdir(ui, repo, modified + added, tmproot)
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156 else:
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157 # This lets the diff tool open the changed file directly
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158 dir2 = ''
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159 dir2root = repo.root
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160
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161 # If only one change, diff the files instead of the directories
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162 if changes == 1 :
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163 if len(modified):
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164 dir1 = os.path.join(dir1, util.localpath(modified[0]))
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165 dir2 = os.path.join(dir2root, dir2, util.localpath(modified[0]))
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166 elif len(removed) :
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167 dir1 = os.path.join(dir1, util.localpath(removed[0]))
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168 dir2 = os.devnull
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169 else:
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170 dir1 = os.devnull
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171 dir2 = os.path.join(dir2root, dir2, util.localpath(added[0]))
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172
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173 cmdline = ('%s %s %s %s' %
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174 (util.shellquote(diffcmd), ' '.join(diffopts),
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175 util.shellquote(dir1), util.shellquote(dir2)))
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176 ui.debug(_('running %r in %s\n') % (cmdline, tmproot))
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177 util.system(cmdline, cwd=tmproot)
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178
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179 for copy_fn, working_fn, mtime in fns_and_mtime:
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180 if os.path.getmtime(copy_fn) != mtime:
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181 ui.debug(_('file changed while diffing. '
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182 'Overwriting: %s (src: %s)\n') % (working_fn, copy_fn))
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183 util.copyfile(copy_fn, working_fn)
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184
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185 return 1
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186 finally:
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187 ui.note(_('cleaning up temp directory\n'))
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188 shutil.rmtree(tmproot)
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189
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190 def extdiff(ui, repo, *pats, **opts):
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191 '''use external program to diff repository (or selected files)
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192
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193 Show differences between revisions for the specified files, using
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194 an external program. The default program used is diff, with
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195 default options "-Npru".
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196
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197 To select a different program, use the -p option. The program will
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198 be passed the names of two directories to compare. To pass
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199 additional options to the program, use the -o option. These will
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200 be passed before the names of the directories to compare.
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201
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202 When two revision arguments are given, then changes are shown
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203 between those revisions. If only one revision is specified then
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204 that revision is compared to the working directory, and, when no
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205 revisions are specified, the working directory files are compared
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206 to its parent.'''
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207 program = opts['program'] or 'diff'
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208 if opts['program']:
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209 option = opts['option']
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210 else:
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211 option = opts['option'] or ['-Npru']
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212 return dodiff(ui, repo, program, option, pats, opts)
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213
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214 cmdtable = {
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215 "extdiff":
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216 (extdiff,
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217 [('p', 'program', '', _('comparison program to run')),
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218 ('o', 'option', [], _('pass option to comparison program')),
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219 ('r', 'rev', [], _('revision')),
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diff changeset
220 ('c', 'change', '', _('change made by revision')),
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diff changeset
221 ] + commands.walkopts,
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222 _('hg extdiff [OPT]... [FILE]...')),
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223 }
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224
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225 def uisetup(ui):
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226 for cmd, path in ui.configitems('extdiff'):
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227 if cmd.startswith('cmd.'):
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228 cmd = cmd[4:]
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229 if not path: path = cmd
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230 diffopts = ui.config('extdiff', 'opts.' + cmd, '')
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231 diffopts = diffopts and [diffopts] or []
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232 elif cmd.startswith('opts.'):
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233 continue
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234 else:
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235 # command = path opts
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236 if path:
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diff changeset
237 diffopts = shlex.split(path)
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238 path = diffopts.pop(0)
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239 else:
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diff changeset
240 path, diffopts = cmd, []
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diff changeset
241 def save(cmd, path, diffopts):
2333
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242 '''use closure to save diff command to use'''
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243 def mydiff(ui, repo, *pats, **opts):
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diff changeset
244 return dodiff(ui, repo, path, diffopts, pats, opts)
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diff changeset
245 mydiff.__doc__ = '''use %(path)s to diff repository (or selected files)
2333
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246
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diff changeset
247 Show differences between revisions for the specified
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diff changeset
248 files, using the %(path)s program.
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249
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250 When two revision arguments are given, then changes are
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diff changeset
251 shown between those revisions. If only one revision is
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diff changeset
252 specified then that revision is compared to the working
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253 directory, and, when no revisions are specified, the
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diff changeset
254 working directory files are compared to its parent.''' % {
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diff changeset
255 'path': util.uirepr(path),
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diff changeset
256 }
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257 return mydiff
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diff changeset
258 cmdtable[cmd] = (save(cmd, path, diffopts),
2333
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diff changeset
259 cmdtable['extdiff'][1][1:],
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parents: 4096
diff changeset
260 _('hg %s [OPTION]... [FILE]...') % cmd)