Mercurial > public > mercurial-scm > hg

annotate mercurial/archival.py @ 5909:f45f7390c1c5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
strip: calculate list of extra nodes to save and pass it to changegroupsubset When we remove revision N from the repository, all revisions >= N are affected: either it's a descendant from N and will also be removed, or it's not a descendant of N and will be renumbered. As a consequence, we have to (at least temporarily) remove all filelog and manifest revisions that have a linkrev >= N, readding some of them later. Unfortunately, it's possible to have a revlog with two revisions r1 and r2 such that r1 < r2, but linkrev(r1) > linkrev(r2). If we try to strip revision linkrev(r1) from the repository, we'll also lose revision r2 when we truncate this revlog. We already use changegroupsubset to create a temporary changegroup containing the revisions that have to be restored, but that function is unable to detect that we also wanted to save the r2 in the case above. So we manually calculate these extra nodes and pass it to changegroupsubset. This should fix issue764.
author Alexis S. L. Carvalho <alexis@cecm.usp.br>
date Sat, 19 Jan 2008 18:01:16 -0200
parents 111ed8c871bf
children 20b05618b3e2
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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
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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 *
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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 fname = self.filename[:-3]
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56 flags = 0
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57 if fname:
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58 flags = gzip.FNAME
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59 self.fileobj.write(chr(flags))
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60 gzip.write32u(self.fileobj, long(self.timestamp))
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61 self.fileobj.write('\002')
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62 self.fileobj.write('\377')
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63 if fname:
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64 self.fileobj.write(fname + '\000')
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65
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66 def __init__(self, dest, prefix, mtime, kind=''):
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67 self.prefix = tidyprefix(dest, prefix, ['.tar', '.tar.bz2', '.tar.gz',
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68 '.tgz', '.tbz2'])
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69 self.mtime = mtime
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70
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71 def taropen(name, mode, fileobj=None):
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72 if kind == 'gz':
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73 mode = mode[0]
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74 if not fileobj:
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75 fileobj = open(name, mode + 'b')
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76 gzfileobj = self.GzipFileWithTime(name, mode + 'b',
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77 zlib.Z_BEST_COMPRESSION,
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78 fileobj, timestamp=mtime)
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79 return tarfile.TarFile.taropen(name, mode, gzfileobj)
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80 else:
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81 return tarfile.open(name, mode + kind, fileobj)
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82
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83 if isinstance(dest, str):
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84 self.z = taropen(dest, mode='w:')
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85 else:
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86 # Python 2.5-2.5.1 have a regression that requires a name arg
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87 self.z = taropen(name='', mode='w|', fileobj=dest)
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89 def addfile(self, name, mode, islink, data):
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90 i = tarfile.TarInfo(self.prefix + name)
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91 i.mtime = self.mtime
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92 i.size = len(data)
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93 if islink:
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94 i.type = tarfile.SYMTYPE
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95 i.mode = 0777
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96 i.linkname = data
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97 data = None
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98 else:
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99 i.mode = mode
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100 data = cStringIO.StringIO(data)
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101 self.z.addfile(i, data)
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102
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103 def done(self):
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104 self.z.close()
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105
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106 class tellable:
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107 '''provide tell method for zipfile.ZipFile when writing to http
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108 response file object.'''
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109
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110 def __init__(self, fp):
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111 self.fp = fp
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112 self.offset = 0
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113
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114 def __getattr__(self, key):
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115 return getattr(self.fp, key)
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116
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117 def write(self, s):
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118 self.fp.write(s)
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119 self.offset += len(s)
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120
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121 def tell(self):
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122 return self.offset
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123
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124 class zipit:
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125 '''write archive to zip file or stream. can write uncompressed,
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126 or compressed with deflate.'''
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127
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128 def __init__(self, dest, prefix, mtime, compress=True):
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129 self.prefix = tidyprefix(dest, prefix, ('.zip',))
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130 if not isinstance(dest, str):
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131 try:
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132 dest.tell()
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133 except (AttributeError, IOError):
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134 dest = tellable(dest)
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135 self.z = zipfile.ZipFile(dest, 'w',
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136 compress and zipfile.ZIP_DEFLATED or
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137 zipfile.ZIP_STORED)
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138 self.date_time = time.gmtime(mtime)[:6]
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139
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140 def addfile(self, name, mode, islink, data):
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141 i = zipfile.ZipInfo(self.prefix + name, self.date_time)
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142 i.compress_type = self.z.compression
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143 # unzip will not honor unix file modes unless file creator is
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144 # set to unix (id 3).
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145 i.create_system = 3
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146 ftype = stat.S_IFREG
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147 if islink:
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148 mode = 0777
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149 ftype = stat.S_IFLNK
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150 i.external_attr = (mode | ftype) << 16L
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151 self.z.writestr(i, data)
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152
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153 def done(self):
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154 self.z.close()
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155
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156 class fileit:
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157 '''write archive as files in directory.'''
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158
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159 def __init__(self, name, prefix, mtime):
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160 if prefix:
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161 raise util.Abort(_('cannot give prefix when archiving to files'))
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162 self.basedir = name
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163 self.opener = util.opener(self.basedir)
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164
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165 def addfile(self, name, mode, islink, data):
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166 if islink:
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167 self.opener.symlink(data, name)
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168 return
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169 f = self.opener(name, "w", atomictemp=True)
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170 f.write(data)
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171 f.rename()
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172 destfile = os.path.join(self.basedir, name)
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173 os.chmod(destfile, mode)
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174
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175 def done(self):
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176 pass
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177
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178 archivers = {
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179 'files': fileit,
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180 'tar': tarit,
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181 'tbz2': lambda name, prefix, mtime: tarit(name, prefix, mtime, 'bz2'),
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182 'tgz': lambda name, prefix, mtime: tarit(name, prefix, mtime, 'gz'),
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183 'uzip': lambda name, prefix, mtime: zipit(name, prefix, mtime, False),
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184 'zip': zipit,
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185 }
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186
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187 def archive(repo, dest, node, kind, decode=True, matchfn=None,
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188 prefix=None, mtime=None):
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189 '''create archive of repo as it was at node.
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190
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191 dest can be name of directory, name of archive file, or file
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192 object to write archive to.
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193
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194 kind is type of archive to create.
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195
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196 decode tells whether to put files through decode filters from
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197 hgrc.
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198
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199 matchfn is function to filter names of files to write to archive.
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200
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201 prefix is name of path to put before every archive member.'''
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202
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203 def write(name, mode, islink, getdata):
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204 if matchfn and not matchfn(name): return
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205 data = getdata()
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206 if decode:
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207 data = repo.wwritedata(name, data)
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208 archiver.addfile(name, mode, islink, data)
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209
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210 ctx = repo.changectx(node)
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211 archiver = archivers[kind](dest, prefix, mtime or ctx.date()[0])
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212 m = ctx.manifest()
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213 items = m.items()
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214 items.sort()
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215 write('.hg_archival.txt', 0644, False,
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216 lambda: 'repo: %s\nnode: %s\n' % (hex(repo.changelog.node(0)), hex(node)))
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217 for filename, filenode in items:
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218 write(filename, m.execf(filename) and 0755 or 0644, m.linkf(filename),
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219 lambda: repo.file(filename).read(filenode))
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220 archiver.done()