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annotate mercurial/archival.py @ 2168:dd4ec4576cc8

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Proper check to see if zip dest needs to be wrapped in tellable From hgweb, calling archival.zipit fails with the error message "Illegal seek". This happens because sys.stdout.tell() throws an exception: Traceback (most recent call last): File "/usr/lib/python2.4/site-packages/mercurial/archival.py", line 99, in addfile self.z.writestr(i, data) File "/usr/lib/python2.4/zipfile.py", line 468, in writestr zinfo.header_offset = self.fp.tell() # Start of header bytes Checking whether hasattr(dest, 'tell') is insufficient, because sys.stdout has a tell() method; you just can't call it. This patch instead determines whether a fileobj is tellable by trying to tell(), wrapping the fileobj if an exception is generated.
author Colin McMillen <mcmillen@cs.cmu.edu>
date Sun, 30 Apr 2006 22:43:41 +0200
parents 2b03c6733efa
children 4564794b6f55
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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 demandload import *
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9 from i18n import gettext as _
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10 from node import *
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11 demandload(globals(), 'cStringIO os stat tarfile time util zipfile')
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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 = prefix.replace('\\', '/')
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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 def __init__(self, dest, prefix, kind=''):
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41 self.prefix = tidyprefix(dest, prefix, ['.tar', '.tar.bz2', '.tar.gz',
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42 '.tgz', 'tbz2'])
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43 self.mtime = int(time.time())
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44 if isinstance(dest, str):
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45 self.z = tarfile.open(dest, mode='w:'+kind)
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46 else:
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47 self.z = tarfile.open(mode='w|'+kind, fileobj=dest)
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48
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49 def addfile(self, name, mode, data):
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50 i = tarfile.TarInfo(self.prefix + name)
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51 i.mtime = self.mtime
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52 i.size = len(data)
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53 i.mode = mode
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54 self.z.addfile(i, cStringIO.StringIO(data))
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55
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56 def done(self):
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57 self.z.close()
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58
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59 class tellable:
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60 '''provide tell method for zipfile.ZipFile when writing to http
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61 response file object.'''
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62
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63 def __init__(self, fp):
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64 self.fp = fp
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65 self.offset = 0
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66
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67 def __getattr__(self, key):
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68 return getattr(self.fp, key)
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69
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70 def write(self, s):
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71 self.fp.write(s)
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72 self.offset += len(s)
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73
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74 def tell(self):
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75 return self.offset
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76
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77 class zipit:
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78 '''write archive to zip file or stream. can write uncompressed,
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79 or compressed with deflate.'''
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80
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81 def __init__(self, dest, prefix, compress=True):
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82 self.prefix = tidyprefix(dest, prefix, ('.zip',))
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83 if not isinstance(dest, str):
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84 try:
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85 dest.tell()
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86 except AttributeError:
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87 dest = tellable(dest)
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88 except IOError:
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89 dest = tellable(dest)
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90 self.z = zipfile.ZipFile(dest, 'w',
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91 compress and zipfile.ZIP_DEFLATED or
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92 zipfile.ZIP_STORED)
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93 self.date_time = time.gmtime(time.time())[:6]
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94
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95 def addfile(self, name, mode, data):
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96 i = zipfile.ZipInfo(self.prefix + name, self.date_time)
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97 i.compress_type = self.z.compression
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98 i.flag_bits = 0x08
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99 # unzip will not honor unix file modes unless file creator is
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100 # set to unix (id 3).
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101 i.create_system = 3
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102 i.external_attr = (mode | stat.S_IFREG) << 16L
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103 self.z.writestr(i, data)
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104
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105 def done(self):
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106 self.z.close()
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107
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108 class fileit:
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109 '''write archive as files in directory.'''
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110
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111 def __init__(self, name, prefix):
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112 if prefix:
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113 raise util.Abort(_('cannot give prefix when archiving to files'))
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114 self.basedir = name
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115 self.dirs = {}
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116 self.oflags = (os.O_CREAT | os.O_EXCL | os.O_WRONLY |
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117 getattr(os, 'O_BINARY', 0) |
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118 getattr(os, 'O_NOFOLLOW', 0))
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119
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120 def addfile(self, name, mode, data):
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121 destfile = os.path.join(self.basedir, name)
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122 destdir = os.path.dirname(destfile)
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123 if destdir not in self.dirs:
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124 if not os.path.isdir(destdir):
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125 os.makedirs(destdir)
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126 self.dirs[destdir] = 1
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127 os.fdopen(os.open(destfile, self.oflags, mode), 'wb').write(data)
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128
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129 def done(self):
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130 pass
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131
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132 archivers = {
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133 'files': fileit,
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134 'tar': tarit,
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135 'tbz2': lambda name, prefix: tarit(name, prefix, 'bz2'),
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136 'tgz': lambda name, prefix: tarit(name, prefix, 'gz'),
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137 'uzip': lambda name, prefix: zipit(name, prefix, False),
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138 'zip': zipit,
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139 }
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140
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141 def archive(repo, dest, node, kind, decode=True, matchfn=None,
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142 prefix=None):
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143 '''create archive of repo as it was at node.
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144
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145 dest can be name of directory, name of archive file, or file
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146 object to write archive to.
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147
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148 kind is type of archive to create.
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149
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150 decode tells whether to put files through decode filters from
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151 hgrc.
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152
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153 matchfn is function to filter names of files to write to archive.
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154
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155 prefix is name of path to put before every archive member.'''
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156
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157 def write(name, mode, data):
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158 if matchfn and not matchfn(name): return
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159 if decode:
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160 fp = cStringIO.StringIO()
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161 repo.wwrite(None, data, fp)
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162 data = fp.getvalue()
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163 archiver.addfile(name, mode, data)
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164
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165 archiver = archivers[kind](dest, prefix)
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166 mn = repo.changelog.read(node)[0]
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167 mf = repo.manifest.read(mn).items()
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168 mff = repo.manifest.readflags(mn)
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169 mf.sort()
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170 write('.hg_archival.txt', 0644,
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171 'repo: %s\nnode: %s\n' % (hex(repo.changelog.node(0)), hex(node)))
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172 for filename, filenode in mf:
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173 write(filename, mff[filename] and 0755 or 0644,
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174 repo.file(filename).read(filenode))
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175 archiver.done()