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annotate mercurial/archival.py @ 7305:c21d236ca897

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hgweb: descend empty directories in web view When a manifest has a series of directories with nothing in them but a single directory, displaying the entire chain of empty directories allows for navigation down to the first non-empty directory with a single click. Because Java links package hierarchy to directory hierarchy, and because Java conventions include at least three empty directories at the top of this hierarchy, descending down empty directories is very common in Java web tools.
author Ry4an Brase <ry4an-hg@ry4an.org>
date Mon, 03 Nov 2008 10:20:28 +0100
parents 580d5e6bfc1f
children fd3e5ff53a31
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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
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6 # the GNU General Public License, incorporated herein by reference.
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7
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8 from i18n import _
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9 from node import hex
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10 import cStringIO, os, stat, tarfile, time, util, zipfile
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11 import zlib, gzip
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12
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13 def tidyprefix(dest, prefix, suffixes):
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14 '''choose prefix to use for names in archive. make sure prefix is
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15 safe for consumers.'''
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16
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17 if prefix:
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18 prefix = util.normpath(prefix)
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19 else:
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20 if not isinstance(dest, str):
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21 raise ValueError('dest must be string if no prefix')
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22 prefix = os.path.basename(dest)
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23 lower = prefix.lower()
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24 for sfx in suffixes:
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25 if lower.endswith(sfx):
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26 prefix = prefix[:-len(sfx)]
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27 break
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28 lpfx = os.path.normpath(util.localpath(prefix))
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29 prefix = util.pconvert(lpfx)
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30 if not prefix.endswith('/'):
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31 prefix += '/'
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32 if prefix.startswith('../') or os.path.isabs(lpfx) or '/../' in prefix:
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33 raise util.Abort(_('archive prefix contains illegal components'))
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34 return prefix
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35
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36 class tarit:
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37 '''write archive to tar file or stream. can write uncompressed,
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38 or compress with gzip or bzip2.'''
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39
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40 class GzipFileWithTime(gzip.GzipFile):
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41
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42 def __init__(self, *args, **kw):
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43 timestamp = None
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44 if 'timestamp' in kw:
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45 timestamp = kw.pop('timestamp')
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46 if timestamp == None:
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47 self.timestamp = time.time()
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48 else:
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49 self.timestamp = timestamp
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50 gzip.GzipFile.__init__(self, *args, **kw)
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51
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52 def _write_gzip_header(self):
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53 self.fileobj.write('\037\213') # magic header
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54 self.fileobj.write('\010') # compression method
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55 # Python 2.6 deprecates self.filename
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56 fname = getattr(self, 'name', None) or self.filename
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57 flags = 0
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58 if fname:
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59 flags = gzip.FNAME
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60 self.fileobj.write(chr(flags))
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61 gzip.write32u(self.fileobj, long(self.timestamp))
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62 self.fileobj.write('\002')
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63 self.fileobj.write('\377')
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64 if fname:
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65 self.fileobj.write(fname + '\000')
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66
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67 def __init__(self, dest, prefix, mtime, kind=''):
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68 self.prefix = tidyprefix(dest, prefix, ['.tar', '.tar.bz2', '.tar.gz',
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69 '.tgz', '.tbz2'])
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70 self.mtime = mtime
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71
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72 def taropen(name, mode, fileobj=None):
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73 if kind == 'gz':
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74 mode = mode[0]
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75 if not fileobj:
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76 fileobj = open(name, mode + 'b')
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77 gzfileobj = self.GzipFileWithTime(name, mode + 'b',
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78 zlib.Z_BEST_COMPRESSION,
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79 fileobj, timestamp=mtime)
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80 return tarfile.TarFile.taropen(name, mode, gzfileobj)
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81 else:
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82 return tarfile.open(name, mode + kind, fileobj)
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83
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84 if isinstance(dest, str):
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85 self.z = taropen(dest, mode='w:')
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86 else:
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87 # Python 2.5-2.5.1 have a regression that requires a name arg
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88 self.z = taropen(name='', mode='w|', fileobj=dest)
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89
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90 def addfile(self, name, mode, islink, data):
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91 i = tarfile.TarInfo(self.prefix + name)
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92 i.mtime = self.mtime
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93 i.size = len(data)
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94 if islink:
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95 i.type = tarfile.SYMTYPE
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96 i.mode = 0777
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97 i.linkname = data
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98 data = None
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99 else:
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100 i.mode = mode
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101 data = cStringIO.StringIO(data)
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102 self.z.addfile(i, data)
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103
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104 def done(self):
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105 self.z.close()
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106
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107 class tellable:
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108 '''provide tell method for zipfile.ZipFile when writing to http
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109 response file object.'''
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110
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111 def __init__(self, fp):
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112 self.fp = fp
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113 self.offset = 0
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114
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115 def __getattr__(self, key):
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116 return getattr(self.fp, key)
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117
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118 def write(self, s):
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119 self.fp.write(s)
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120 self.offset += len(s)
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121
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122 def tell(self):
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123 return self.offset
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124
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125 class zipit:
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126 '''write archive to zip file or stream. can write uncompressed,
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127 or compressed with deflate.'''
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128
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129 def __init__(self, dest, prefix, mtime, compress=True):
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130 self.prefix = tidyprefix(dest, prefix, ('.zip',))
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131 if not isinstance(dest, str):
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132 try:
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133 dest.tell()
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134 except (AttributeError, IOError):
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135 dest = tellable(dest)
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136 self.z = zipfile.ZipFile(dest, 'w',
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137 compress and zipfile.ZIP_DEFLATED or
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138 zipfile.ZIP_STORED)
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139 self.date_time = time.gmtime(mtime)[:6]
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140
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141 def addfile(self, name, mode, islink, data):
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142 i = zipfile.ZipInfo(self.prefix + name, self.date_time)
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143 i.compress_type = self.z.compression
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144 # unzip will not honor unix file modes unless file creator is
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145 # set to unix (id 3).
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146 i.create_system = 3
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147 ftype = stat.S_IFREG
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148 if islink:
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149 mode = 0777
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150 ftype = stat.S_IFLNK
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151 i.external_attr = (mode | ftype) << 16L
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152 self.z.writestr(i, data)
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153
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154 def done(self):
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155 self.z.close()
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156
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157 class fileit:
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158 '''write archive as files in directory.'''
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159
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160 def __init__(self, name, prefix, mtime):
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161 if prefix:
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162 raise util.Abort(_('cannot give prefix when archiving to files'))
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163 self.basedir = name
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164 self.opener = util.opener(self.basedir)
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165
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166 def addfile(self, name, mode, islink, data):
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167 if islink:
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168 self.opener.symlink(data, name)
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169 return
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170 f = self.opener(name, "w", atomictemp=True)
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171 f.write(data)
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172 f.rename()
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173 destfile = os.path.join(self.basedir, name)
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174 os.chmod(destfile, mode)
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175
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176 def done(self):
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177 pass
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178
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179 archivers = {
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180 'files': fileit,
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181 'tar': tarit,
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182 'tbz2': lambda name, prefix, mtime: tarit(name, prefix, mtime, 'bz2'),
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183 'tgz': lambda name, prefix, mtime: tarit(name, prefix, mtime, 'gz'),
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184 'uzip': lambda name, prefix, mtime: zipit(name, prefix, mtime, False),
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185 'zip': zipit,
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186 }
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187
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188 def archive(repo, dest, node, kind, decode=True, matchfn=None,
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189 prefix=None, mtime=None):
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190 '''create archive of repo as it was at node.
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191
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192 dest can be name of directory, name of archive file, or file
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193 object to write archive to.
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194
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195 kind is type of archive to create.
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196
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197 decode tells whether to put files through decode filters from
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198 hgrc.
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199
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200 matchfn is function to filter names of files to write to archive.
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201
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202 prefix is name of path to put before every archive member.'''
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203
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204 def write(name, mode, islink, getdata):
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205 if matchfn and not matchfn(name): return
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206 data = getdata()
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207 if decode:
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208 data = repo.wwritedata(name, data)
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209 archiver.addfile(name, mode, islink, data)
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210
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211 if kind not in archivers:
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212 raise util.Abort(_("unknown archive type '%s'") % kind)
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213
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214 ctx = repo[node]
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215 archiver = archivers[kind](dest, prefix, mtime or ctx.date()[0])
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216
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217 if repo.ui.configbool("ui", "archivemeta", True):
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218 write('.hg_archival.txt', 0644, False,
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219 lambda: 'repo: %s\nnode: %s\n' % (
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220 hex(repo.changelog.node(0)), hex(node)))
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221 for f in ctx:
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222 ff = ctx.flags(f)
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223 write(f, 'x' in ff and 0755 or 0644, 'l' in ff, ctx[f].data)
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224 archiver.done()