Mercurial > hg
annotate hgext/relink.py @ 26362:3bfc473f4d33
gitweb, monoblue: fix vertical align of spans in .sourcelines
Empty lines in file view could produce an inexplicable margin before the next
line (most noticeable in browsers on webkit/blink engine). That was making
empty lines seem taller than the rest.
Instead of using default vertical align, let's set it to 'top'.
This issue is actually present in paper, and only recently got into gitweb
(2239626369f5) and monoblue (119202d4d7a4). There's a bit more to it in paper,
so that will be dealt with in a future patch.
Recipe to see live: preferably using a webkit/blink browser, such as chromium,
browse a file with empty lines, e.g. https://selenic.com/hg/file/3.5/README#l8
Selecting a block of text that includes empty lines will reveal white "breaks"
in the selection. Highlighted line (#l8) also shows such a break below itself.
author | Anton Shestakov <av6@dwimlabs.net> |
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date | Fri, 25 Sep 2015 03:02:38 +0800 |
parents | 328739ea70c3 |
children | 56b2bcea2529 |
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1 # Mercurial extension to provide 'hg relink' command |
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2 # |
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3 # Copyright (C) 2007 Brendan Cully <brendan@kublai.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 """recreates hardlinks between repository clones""" |
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9 |
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10 from mercurial import cmdutil, hg, util |
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11 from mercurial.i18n import _ |
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12 import os, stat |
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13 |
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14 cmdtable = {} |
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15 command = cmdutil.command(cmdtable) |
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16 # Note for extension authors: ONLY specify testedwith = 'internal' for |
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17 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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18 # be specifying the version(s) of Mercurial they are tested with, or |
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19 # leave the attribute unspecified. |
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20 testedwith = 'internal' |
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21 |
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22 @command('relink', [], _('[ORIGIN]')) |
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23 def relink(ui, repo, origin=None, **opts): |
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24 """recreate hardlinks between two repositories |
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25 |
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26 When repositories are cloned locally, their data files will be |
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27 hardlinked so that they only use the space of a single repository. |
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28 |
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29 Unfortunately, subsequent pulls into either repository will break |
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30 hardlinks for any files touched by the new changesets, even if |
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31 both repositories end up pulling the same changes. |
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32 |
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33 Similarly, passing --rev to "hg clone" will fail to use any |
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34 hardlinks, falling back to a complete copy of the source |
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35 repository. |
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36 |
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37 This command lets you recreate those hardlinks and reclaim that |
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38 wasted space. |
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39 |
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40 This repository will be relinked to share space with ORIGIN, which |
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41 must be on the same local disk. If ORIGIN is omitted, looks for |
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42 "default-relink", then "default", in [paths]. |
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43 |
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44 Do not attempt any read operations on this repository while the |
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45 command is running. (Both repositories will be locked against |
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46 writes.) |
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47 """ |
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48 if (not util.safehasattr(util, 'samefile') or |
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49 not util.safehasattr(util, 'samedevice')): |
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50 raise util.Abort(_('hardlinks are not supported on this system')) |
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51 src = hg.repository(repo.baseui, ui.expandpath(origin or 'default-relink', |
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52 origin or 'default')) |
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53 ui.status(_('relinking %s to %s\n') % (src.store.path, repo.store.path)) |
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54 if repo.root == src.root: |
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55 ui.status(_('there is nothing to relink\n')) |
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56 return |
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57 |
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58 if not util.samedevice(src.store.path, repo.store.path): |
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59 # No point in continuing |
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60 raise util.Abort(_('source and destination are on different devices')) |
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61 |
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62 locallock = repo.lock() |
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63 try: |
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64 remotelock = src.lock() |
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65 try: |
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66 candidates = sorted(collect(src, ui)) |
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67 targets = prune(candidates, src.store.path, repo.store.path, ui) |
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68 do_relink(src.store.path, repo.store.path, targets, ui) |
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69 finally: |
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70 remotelock.release() |
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71 finally: |
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72 locallock.release() |
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73 |
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74 def collect(src, ui): |
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75 seplen = len(os.path.sep) |
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76 candidates = [] |
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77 live = len(src['tip'].manifest()) |
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78 # Your average repository has some files which were deleted before |
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79 # the tip revision. We account for that by assuming that there are |
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80 # 3 tracked files for every 2 live files as of the tip version of |
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81 # the repository. |
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82 # |
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83 # mozilla-central as of 2010-06-10 had a ratio of just over 7:5. |
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84 total = live * 3 // 2 |
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85 src = src.store.path |
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86 pos = 0 |
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87 ui.status(_("tip has %d files, estimated total number of files: %s\n") |
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88 % (live, total)) |
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89 for dirpath, dirnames, filenames in os.walk(src): |
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90 dirnames.sort() |
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91 relpath = dirpath[len(src) + seplen:] |
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92 for filename in sorted(filenames): |
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93 if filename[-2:] not in ('.d', '.i'): |
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94 continue |
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95 st = os.stat(os.path.join(dirpath, filename)) |
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96 if not stat.S_ISREG(st.st_mode): |
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97 continue |
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98 pos += 1 |
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99 candidates.append((os.path.join(relpath, filename), st)) |
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100 ui.progress(_('collecting'), pos, filename, _('files'), total) |
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101 |
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102 ui.progress(_('collecting'), None) |
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103 ui.status(_('collected %d candidate storage files\n') % len(candidates)) |
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104 return candidates |
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105 |
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106 def prune(candidates, src, dst, ui): |
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107 def linkfilter(src, dst, st): |
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108 try: |
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109 ts = os.stat(dst) |
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110 except OSError: |
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111 # Destination doesn't have this file? |
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112 return False |
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113 if util.samefile(src, dst): |
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114 return False |
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115 if not util.samedevice(src, dst): |
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116 # No point in continuing |
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117 raise util.Abort( |
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118 _('source and destination are on different devices')) |
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119 if st.st_size != ts.st_size: |
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120 return False |
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121 return st |
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122 |
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123 targets = [] |
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124 total = len(candidates) |
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125 pos = 0 |
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126 for fn, st in candidates: |
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127 pos += 1 |
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128 srcpath = os.path.join(src, fn) |
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129 tgt = os.path.join(dst, fn) |
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130 ts = linkfilter(srcpath, tgt, st) |
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131 if not ts: |
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132 ui.debug('not linkable: %s\n' % fn) |
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133 continue |
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134 targets.append((fn, ts.st_size)) |
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135 ui.progress(_('pruning'), pos, fn, _('files'), total) |
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136 |
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137 ui.progress(_('pruning'), None) |
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138 ui.status(_('pruned down to %d probably relinkable files\n') % len(targets)) |
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139 return targets |
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140 |
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141 def do_relink(src, dst, files, ui): |
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142 def relinkfile(src, dst): |
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143 bak = dst + '.bak' |
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144 os.rename(dst, bak) |
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145 try: |
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146 util.oslink(src, dst) |
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147 except OSError: |
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148 os.rename(bak, dst) |
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149 raise |
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150 os.remove(bak) |
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151 |
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152 CHUNKLEN = 65536 |
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153 relinked = 0 |
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154 savedbytes = 0 |
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155 |
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156 pos = 0 |
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157 total = len(files) |
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158 for f, sz in files: |
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159 pos += 1 |
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160 source = os.path.join(src, f) |
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161 tgt = os.path.join(dst, f) |
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162 # Binary mode, so that read() works correctly, especially on Windows |
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163 sfp = file(source, 'rb') |
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164 dfp = file(tgt, 'rb') |
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165 sin = sfp.read(CHUNKLEN) |
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166 while sin: |
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167 din = dfp.read(CHUNKLEN) |
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168 if sin != din: |
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169 break |
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170 sin = sfp.read(CHUNKLEN) |
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171 sfp.close() |
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172 dfp.close() |
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173 if sin: |
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174 ui.debug('not linkable: %s\n' % f) |
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175 continue |
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176 try: |
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177 relinkfile(source, tgt) |
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178 ui.progress(_('relinking'), pos, f, _('files'), total) |
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179 relinked += 1 |
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180 savedbytes += sz |
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181 except OSError as inst: |
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182 ui.warn('%s: %s\n' % (tgt, str(inst))) |
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183 |
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184 ui.progress(_('relinking'), None) |
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185 |
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186 ui.status(_('relinked %d files (%s reclaimed)\n') % |
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187 (relinked, util.bytecount(savedbytes))) |