Mercurial > hg
annotate mercurial/archival.py @ 47387:75e1104f23a2
revlog: use dedicated code for reading sidedata
We are about to introduce a new, dedicated, file to store sidedata. Before doing so, we make sidedata reading go through different code as reading data chunk. This will simplify some of the complexity of the next changesets.
The reading is very simple right now and will need some improvement later to
reuse some of the caching strategy we use for the data file.
Differential Revision: https://phab.mercurial-scm.org/D10785
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 27 May 2021 04:09:30 +0200 |
parents | 89a2afe31e82 |
children | 406a7e629946 |
rev | line source |
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1 # archival.py - revision archival 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 of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 import gzip |
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11 import os |
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12 import struct |
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13 import tarfile |
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14 import time |
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15 import zipfile |
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16 import zlib |
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17 |
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18 from .i18n import _ |
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19 from .node import nullrev |
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20 from .pycompat import open |
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21 |
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22 from . import ( |
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23 error, |
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24 formatter, |
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25 match as matchmod, |
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26 pycompat, |
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27 scmutil, |
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28 util, |
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29 vfs as vfsmod, |
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30 ) |
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31 |
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32 stringio = util.stringio |
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33 |
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34 # from unzip source code: |
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35 _UNX_IFREG = 0x8000 |
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36 _UNX_IFLNK = 0xA000 |
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37 |
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38 |
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39 def tidyprefix(dest, kind, prefix): |
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40 """choose prefix to use for names in archive. make sure prefix is |
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41 safe for consumers.""" |
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42 |
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43 if prefix: |
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44 prefix = util.normpath(prefix) |
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45 else: |
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46 if not isinstance(dest, bytes): |
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47 raise ValueError(b'dest must be string if no prefix') |
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48 prefix = os.path.basename(dest) |
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49 lower = prefix.lower() |
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50 for sfx in exts.get(kind, []): |
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51 if lower.endswith(sfx): |
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52 prefix = prefix[: -len(sfx)] |
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53 break |
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54 lpfx = os.path.normpath(util.localpath(prefix)) |
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55 prefix = util.pconvert(lpfx) |
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56 if not prefix.endswith(b'/'): |
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57 prefix += b'/' |
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58 # Drop the leading '.' path component if present, so Windows can read the |
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59 # zip files (issue4634) |
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60 if prefix.startswith(b'./'): |
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61 prefix = prefix[2:] |
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62 if prefix.startswith(b'../') or os.path.isabs(lpfx) or b'/../' in prefix: |
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63 raise error.Abort(_(b'archive prefix contains illegal components')) |
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64 return prefix |
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65 |
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66 |
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67 exts = { |
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68 b'tar': [b'.tar'], |
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69 b'tbz2': [b'.tbz2', b'.tar.bz2'], |
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70 b'tgz': [b'.tgz', b'.tar.gz'], |
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71 b'zip': [b'.zip'], |
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72 b'txz': [b'.txz', b'.tar.xz'], |
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73 } |
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74 |
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75 |
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76 def guesskind(dest): |
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78 if any(dest.endswith(ext) for ext in extensions): |
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79 return kind |
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80 return None |
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81 |
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82 |
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83 def _rootctx(repo): |
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84 # repo[0] may be hidden |
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85 for rev in repo: |
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86 return repo[rev] |
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87 return repo[nullrev] |
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88 |
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89 |
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90 # {tags} on ctx includes local tags and 'tip', with no current way to limit |
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91 # that to global tags. Therefore, use {latesttag} as a substitute when |
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92 # the distance is 0, since that will be the list of global tags on ctx. |
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93 _defaultmetatemplate = br''' |
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94 repo: {root} |
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95 node: {ifcontains(rev, revset("wdir()"), "{p1node}{dirty}", "{node}")} |
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96 branch: {branch|utf8} |
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97 {ifeq(latesttagdistance, 0, join(latesttag % "tag: {tag}", "\n"), |
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98 separate("\n", |
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99 join(latesttag % "latesttag: {tag}", "\n"), |
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100 "latesttagdistance: {latesttagdistance}", |
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101 "changessincelatesttag: {changessincelatesttag}"))} |
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102 '''[ |
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103 1: |
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104 ] # drop leading '\n' |
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105 |
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106 |
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107 def buildmetadata(ctx): |
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108 '''build content of .hg_archival.txt''' |
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109 repo = ctx.repo() |
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110 |
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111 opts = { |
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112 b'template': repo.ui.config( |
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113 b'experimental', b'archivemetatemplate', _defaultmetatemplate |
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114 ) |
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115 } |
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116 |
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117 out = util.stringio() |
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118 |
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119 fm = formatter.formatter(repo.ui, out, b'archive', opts) |
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120 fm.startitem() |
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121 fm.context(ctx=ctx) |
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122 fm.data(root=_rootctx(repo).hex()) |
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123 |
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124 if ctx.rev() is None: |
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125 dirty = b'' |
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126 if ctx.dirty(missing=True): |
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127 dirty = b'+' |
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128 fm.data(dirty=dirty) |
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129 fm.end() |
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130 |
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131 return out.getvalue() |
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132 |
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133 |
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134 class tarit(object): |
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135 """write archive to tar file or stream. can write uncompressed, |
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136 or compress with gzip or bzip2.""" |
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137 |
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138 if pycompat.ispy3: |
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139 GzipFileWithTime = gzip.GzipFile # camelcase-required |
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140 else: |
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141 |
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142 class GzipFileWithTime(gzip.GzipFile): |
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143 def __init__(self, *args, **kw): |
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144 timestamp = None |
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145 if 'mtime' in kw: |
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146 timestamp = kw.pop('mtime') |
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147 if timestamp is None: |
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148 self.timestamp = time.time() |
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149 else: |
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150 self.timestamp = timestamp |
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151 gzip.GzipFile.__init__(self, *args, **kw) |
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152 |
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153 def _write_gzip_header(self): |
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154 self.fileobj.write(b'\037\213') # magic header |
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155 self.fileobj.write(b'\010') # compression method |
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156 fname = self.name |
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157 if fname and fname.endswith(b'.gz'): |
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158 fname = fname[:-3] |
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159 flags = 0 |
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160 if fname: |
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161 flags = gzip.FNAME # pytype: disable=module-attr |
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162 self.fileobj.write(pycompat.bytechr(flags)) |
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163 gzip.write32u( # pytype: disable=module-attr |
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164 self.fileobj, int(self.timestamp) |
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165 ) |
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166 self.fileobj.write(b'\002') |
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167 self.fileobj.write(b'\377') |
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168 if fname: |
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169 self.fileobj.write(fname + b'\000') |
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170 |
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171 def __init__(self, dest, mtime, kind=b''): |
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172 self.mtime = mtime |
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173 self.fileobj = None |
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174 |
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175 def taropen(mode, name=b'', fileobj=None): |
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176 if kind == b'gz': |
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177 mode = mode[0:1] |
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178 if not fileobj: |
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179 fileobj = open(name, mode + b'b') |
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180 gzfileobj = self.GzipFileWithTime( |
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181 name, |
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182 pycompat.sysstr(mode + b'b'), |
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183 zlib.Z_BEST_COMPRESSION, |
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184 fileobj, |
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185 mtime=mtime, |
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186 ) |
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187 self.fileobj = gzfileobj |
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188 return ( |
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189 tarfile.TarFile.taropen( # pytype: disable=attribute-error |
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190 name, pycompat.sysstr(mode), gzfileobj |
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191 ) |
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192 ) |
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193 else: |
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194 try: |
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195 return tarfile.open( |
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196 name, pycompat.sysstr(mode + kind), fileobj |
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197 ) |
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198 except tarfile.CompressionError as e: |
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199 raise error.Abort(pycompat.bytestr(e)) |
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200 |
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201 if isinstance(dest, bytes): |
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202 self.z = taropen(b'w:', name=dest) |
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203 else: |
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204 self.z = taropen(b'w|', fileobj=dest) |
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205 |
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206 def addfile(self, name, mode, islink, data): |
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207 name = pycompat.fsdecode(name) |
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208 i = tarfile.TarInfo(name) |
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209 i.mtime = self.mtime |
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210 i.size = len(data) |
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211 if islink: |
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212 i.type = tarfile.SYMTYPE |
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213 i.mode = 0o777 |
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214 i.linkname = pycompat.fsdecode(data) |
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215 data = None |
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216 i.size = 0 |
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217 else: |
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218 i.mode = mode |
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219 data = stringio(data) |
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220 self.z.addfile(i, data) |
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221 |
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222 def done(self): |
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223 self.z.close() |
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224 if self.fileobj: |
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225 self.fileobj.close() |
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226 |
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227 |
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228 class zipit(object): |
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229 """write archive to zip file or stream. can write uncompressed, |
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230 or compressed with deflate.""" |
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231 |
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232 def __init__(self, dest, mtime, compress=True): |
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233 if isinstance(dest, bytes): |
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234 dest = pycompat.fsdecode(dest) |
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235 self.z = zipfile.ZipFile( |
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236 dest, 'w', compress and zipfile.ZIP_DEFLATED or zipfile.ZIP_STORED |
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237 ) |
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238 |
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239 # Python's zipfile module emits deprecation warnings if we try |
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240 # to store files with a date before 1980. |
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241 epoch = 315532800 # calendar.timegm((1980, 1, 1, 0, 0, 0, 1, 1, 0)) |
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242 if mtime < epoch: |
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243 mtime = epoch |
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244 |
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245 self.mtime = mtime |
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246 self.date_time = time.gmtime(mtime)[:6] |
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247 |
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248 def addfile(self, name, mode, islink, data): |
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249 i = zipfile.ZipInfo(pycompat.fsdecode(name), self.date_time) |
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250 i.compress_type = self.z.compression # pytype: disable=attribute-error |
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251 # unzip will not honor unix file modes unless file creator is |
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252 # set to unix (id 3). |
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253 i.create_system = 3 |
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254 ftype = _UNX_IFREG |
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255 if islink: |
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256 mode = 0o777 |
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257 ftype = _UNX_IFLNK |
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258 i.external_attr = (mode | ftype) << 16 |
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259 # add "extended-timestamp" extra block, because zip archives |
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260 # without this will be extracted with unexpected timestamp, |
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261 # if TZ is not configured as GMT |
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262 i.extra += struct.pack( |
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263 b'<hhBl', |
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264 0x5455, # block type: "extended-timestamp" |
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265 1 + 4, # size of this block |
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266 1, # "modification time is present" |
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267 int(self.mtime), |
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268 ) # last modification (UTC) |
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269 self.z.writestr(i, data) |
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270 |
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271 def done(self): |
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272 self.z.close() |
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273 |
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274 |
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275 class fileit(object): |
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276 '''write archive as files in directory.''' |
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277 |
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278 def __init__(self, name, mtime): |
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279 self.basedir = name |
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280 self.opener = vfsmod.vfs(self.basedir) |
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281 self.mtime = mtime |
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282 |
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283 def addfile(self, name, mode, islink, data): |
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284 if islink: |
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285 self.opener.symlink(data, name) |
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286 return |
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287 f = self.opener(name, b"w", atomictemp=False) |
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288 f.write(data) |
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289 f.close() |
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290 destfile = os.path.join(self.basedir, name) |
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291 os.chmod(destfile, mode) |
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292 if self.mtime is not None: |
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293 os.utime(destfile, (self.mtime, self.mtime)) |
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294 |
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295 def done(self): |
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296 pass |
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297 |
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298 |
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299 archivers = { |
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300 b'files': fileit, |
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301 b'tar': tarit, |
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302 b'tbz2': lambda name, mtime: tarit(name, mtime, b'bz2'), |
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303 b'tgz': lambda name, mtime: tarit(name, mtime, b'gz'), |
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304 b'txz': lambda name, mtime: tarit(name, mtime, b'xz'), |
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305 b'uzip': lambda name, mtime: zipit(name, mtime, False), |
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306 b'zip': zipit, |
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307 } |
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308 |
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309 |
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310 def archive( |
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311 repo, |
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312 dest, |
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313 node, |
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314 kind, |
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315 decode=True, |
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316 match=None, |
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317 prefix=b'', |
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318 mtime=None, |
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319 subrepos=False, |
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320 ): |
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321 """create archive of repo as it was at node. |
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322 |
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323 dest can be name of directory, name of archive file, or file |
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324 object to write archive to. |
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325 |
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326 kind is type of archive to create. |
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327 |
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328 decode tells whether to put files through decode filters from |
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329 hgrc. |
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330 |
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331 match is a matcher to filter names of files to write to archive. |
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332 |
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333 prefix is name of path to put before every archive member. |
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334 |
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335 mtime is the modified time, in seconds, or None to use the changeset time. |
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336 |
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337 subrepos tells whether to include subrepos. |
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338 """ |
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339 |
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340 if kind == b'txz' and not pycompat.ispy3: |
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341 raise error.Abort(_(b'xz compression is only available in Python 3')) |
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342 |
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343 if kind == b'files': |
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344 if prefix: |
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345 raise error.Abort(_(b'cannot give prefix when archiving to files')) |
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346 else: |
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347 prefix = tidyprefix(dest, kind, prefix) |
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348 |
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349 def write(name, mode, islink, getdata): |
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350 data = getdata() |
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351 if decode: |
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352 data = repo.wwritedata(name, data) |
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353 archiver.addfile(prefix + name, mode, islink, data) |
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354 |
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355 if kind not in archivers: |
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356 raise error.Abort(_(b"unknown archive type '%s'") % kind) |
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357 |
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358 ctx = repo[node] |
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359 archiver = archivers[kind](dest, mtime or ctx.date()[0]) |
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360 |
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361 if not match: |
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362 match = scmutil.matchall(repo) |
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363 |
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364 if repo.ui.configbool(b"ui", b"archivemeta"): |
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365 name = b'.hg_archival.txt' |
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366 if match(name): |
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367 write(name, 0o644, False, lambda: buildmetadata(ctx)) |
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368 |
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369 files = list(ctx.manifest().walk(match)) |
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370 total = len(files) |
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371 if total: |
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372 files.sort() |
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373 scmutil.prefetchfiles( |
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374 repo, [(ctx.rev(), scmutil.matchfiles(repo, files))] |
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375 ) |
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376 progress = repo.ui.makeprogress( |
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377 _(b'archiving'), unit=_(b'files'), total=total |
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378 ) |
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379 progress.update(0) |
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380 for f in files: |
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381 ff = ctx.flags(f) |
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382 write(f, b'x' in ff and 0o755 or 0o644, b'l' in ff, ctx[f].data) |
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383 progress.increment(item=f) |
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384 progress.complete() |
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385 |
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386 if subrepos: |
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387 for subpath in sorted(ctx.substate): |
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388 sub = ctx.workingsub(subpath) |
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389 submatch = matchmod.subdirmatcher(subpath, match) |
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390 subprefix = prefix + subpath + b'/' |
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391 total += sub.archive(archiver, subprefix, submatch, decode) |
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392 |
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393 if total == 0: |
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394 raise error.Abort(_(b'no files match the archive pattern')) |
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395 |
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396 archiver.done() |
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397 return total |