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[svn] Small optimization to be nice to the system: don't try a given extractor
more than once.
1 | 1 | #!/usr/bin/env python |
2 | # | |
19 | 3 | # dtrx -- Intelligently extract various archive types. |
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4 | # Copyright (c) 2006, 2007 Brett Smith <brettcsmith@brettcsmith.org>. |
1 | 5 | # |
6 | # This program is free software; you can redistribute it and/or modify it | |
7 | # under the terms of the GNU General Public License as published by the | |
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8 | # Free Software Foundation; either version 3 of the License, or (at your |
1 | 9 | # option) any later version. |
10 | # | |
11 | # This program is distributed in the hope that it will be useful, but | |
12 | # WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General | |
14 | # Public License for more details. | |
15 | # | |
16 | # You should have received a copy of the GNU General Public License along | |
17 | # with this program; if not, write to the Free Software Foundation, Inc., | |
18 | # 51 Franklin Street, 5th Floor, Boston, MA, 02111. | |
19 | ||
5 | 20 | import errno |
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21 | import logging |
1 | 22 | import mimetypes |
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23 | import optparse |
1 | 24 | import os |
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25 | import re |
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26 | import stat |
1 | 27 | import subprocess |
28 | import sys | |
29 | import tempfile | |
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30 | import textwrap |
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31 | import traceback |
1 | 32 | |
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33 | from sets import Set |
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34 | |
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35 | VERSION = "5.0" |
19 | 36 | VERSION_BANNER = """dtrx version %s |
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37 | Copyright (c) 2006, 2007 Brett Smith <brettcsmith@brettcsmith.org> |
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38 | |
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39 | This program is free software; you can redistribute it and/or modify it |
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40 | under the terms of the GNU General Public License as published by the |
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41 | Free Software Foundation; either version 3 of the License, or (at your |
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42 | option) any later version. |
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43 | |
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44 | This program is distributed in the hope that it will be useful, but |
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45 | WITHOUT ANY WARRANTY; without even the implied warranty of |
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46 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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47 | Public License for more details.""" % (VERSION,) |
1 | 48 | |
49 | MATCHING_DIRECTORY = 1 | |
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50 | ONE_ENTRY = 2 |
1 | 51 | BOMB = 3 |
52 | EMPTY = 4 | |
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53 | ONE_ENTRY_KNOWN = 5 |
1 | 54 | |
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55 | EXTRACT_HERE = 1 |
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56 | EXTRACT_WRAP = 2 |
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57 | EXTRACT_RENAME = 3 |
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58 | |
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59 | RECURSE_ALWAYS = 1 |
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60 | RECURSE_ONCE = 2 |
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61 | RECURSE_NOT_NOW = 3 |
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62 | RECURSE_NEVER = 4 |
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63 | |
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64 | mimetypes.encodings_map.setdefault('.bz2', 'bzip2') |
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65 | mimetypes.encodings_map.setdefault('.lzma', 'lzma') |
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66 | mimetypes.types_map.setdefault('.gem', 'x-ruby-gem') |
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67 | |
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68 | logger = logging.getLogger('dtrx-log') |
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69 | |
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70 | def run_command(command, description, stdout=None, stderr=None, stdin=None): |
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71 | process = subprocess.Popen(command, stdin=stdin, stdout=stdout, |
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72 | stderr=stderr) |
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73 | status = process.wait() |
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74 | for pipe in (process.stdout, process.stderr): |
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75 | try: |
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76 | pipe.close() |
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77 | except AttributeError: |
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78 | pass |
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79 | if status != 0: |
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80 | return ("%s error: '%s' returned status code %s" % |
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81 | (description, ' '.join(command), status)) |
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82 | return None |
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83 | |
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84 | class FilenameChecker(object): |
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85 | def __init__(self, original_name): |
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86 | self.original_name = original_name |
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87 | |
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88 | def is_free(self, filename): |
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89 | return not os.path.exists(filename) |
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90 | |
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91 | def check(self): |
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92 | for suffix in [''] + ['.%s' % (x,) for x in range(1, 10)]: |
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93 | filename = '%s%s' % (self.original_name, suffix) |
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94 | if self.is_free(filename): |
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95 | return filename |
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96 | raise ValueError("all alternatives for name %s taken" % |
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97 | (self.original_name,)) |
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98 | |
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99 | |
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100 | class DirectoryChecker(FilenameChecker): |
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101 | def is_free(self, filename): |
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102 | try: |
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103 | os.mkdir(filename) |
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104 | except OSError, error: |
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105 | if error.errno == errno.EEXIST: |
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106 | return False |
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107 | raise |
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108 | return True |
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109 | |
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110 | |
1 | 111 | class ExtractorError(Exception): |
112 | pass | |
113 | ||
114 | ||
115 | class BaseExtractor(object): | |
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116 | decoders = {'bzip2': 'bzcat', 'gzip': 'zcat', 'compress': 'zcat', |
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117 | 'lzma': 'lzcat'} |
1 | 118 | |
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119 | name_checker = DirectoryChecker |
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120 | |
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121 | def __init__(self, filename, encoding): |
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122 | if encoding and (not self.decoders.has_key(encoding)): |
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123 | raise ValueError("unrecognized encoding %s" % (encoding,)) |
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124 | self.filename = os.path.realpath(filename) |
1 | 125 | self.encoding = encoding |
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126 | self.included_archives = [] |
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127 | self.target = None |
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128 | self.content_type = None |
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129 | self.content_name = None |
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130 | self.pipes = [] |
5 | 131 | try: |
132 | self.archive = open(filename, 'r') | |
133 | except (IOError, OSError), error: | |
134 | raise ExtractorError("could not open %s: %s" % | |
135 | (filename, error.strerror)) | |
1 | 136 | if encoding: |
137 | self.pipe([self.decoders[encoding]], "decoding") | |
138 | self.prepare() | |
139 | ||
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140 | def pipe(self, command, description="extraction"): |
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141 | self.pipes.append((command, description)) |
1 | 142 | |
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143 | def run_pipes(self, final_stdout=None): |
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144 | if final_stdout is None: |
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145 | # FIXME: Buffering this might be dumb. |
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146 | final_stdout = tempfile.TemporaryFile() |
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147 | if not self.pipes: |
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148 | return |
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149 | num_pipes = len(self.pipes) |
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150 | last_pipe = num_pipes - 1 |
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151 | processes = [] |
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152 | for index, command in enumerate([pipe[0] for pipe in self.pipes]): |
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153 | if index == 0: |
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154 | stdin = self.archive |
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155 | else: |
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156 | stdin = processes[-1].stdout |
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157 | if index == last_pipe: |
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158 | stdout = final_stdout |
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159 | else: |
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160 | stdout = subprocess.PIPE |
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161 | processes.append(subprocess.Popen(command, stdin=stdin, |
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162 | stdout=stdout, |
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163 | stderr=subprocess.PIPE)) |
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164 | exit_codes = [pipe.wait() for pipe in processes] |
1 | 165 | self.archive.close() |
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166 | for index in range(last_pipe): |
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167 | processes[index].stdout.close() |
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168 | processes[index].stderr.close() |
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169 | for index, status in enumerate(exit_codes): |
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170 | if status != 0: |
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171 | raise ExtractorError("%s error: '%s' returned status code %s" % |
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172 | (self.pipes[index][1], |
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173 | ' '.join(self.pipes[index][0]), status)) |
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174 | self.archive = final_stdout |
1 | 175 | |
176 | def prepare(self): | |
177 | pass | |
178 | ||
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179 | def check_included_archives(self, filenames): |
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180 | for filename in filenames: |
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181 | if (ExtractorBuilder.try_by_mimetype(filename) or |
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182 | ExtractorBuilder.try_by_extension(filename)): |
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183 | self.included_archives.append(filename) |
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184 | |
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185 | def check_contents(self): |
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186 | filenames = os.listdir('.') |
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187 | if not filenames: |
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188 | self.content_type = EMPTY |
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189 | elif len(filenames) == 1: |
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190 | if self.basename() == filenames[0]: |
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191 | self.content_type = MATCHING_DIRECTORY |
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192 | else: |
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193 | self.content_type = ONE_ENTRY |
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194 | self.content_name = filenames[0] |
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195 | if os.path.isdir(filenames[0]): |
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196 | self.content_name += '/' |
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197 | else: |
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198 | self.content_type = BOMB |
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199 | self.check_included_archives(filenames) |
1 | 200 | |
201 | def basename(self): | |
5 | 202 | pieces = os.path.basename(self.filename).split('.') |
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203 | extension = '.' + pieces[-1] |
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204 | if mimetypes.encodings_map.has_key(extension): |
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205 | pieces.pop() |
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206 | extension = '.' + pieces[-1] |
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207 | if (mimetypes.types_map.has_key(extension) or |
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208 | mimetypes.common_types.has_key(extension) or |
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209 | mimetypes.suffix_map.has_key(extension)): |
1 | 210 | pieces.pop() |
211 | return '.'.join(pieces) | |
212 | ||
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213 | def extract(self): |
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214 | self.target = tempfile.mkdtemp(prefix='.dtrx-', dir='.') |
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215 | old_path = os.path.realpath(os.curdir) |
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216 | os.chdir(self.target) |
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217 | try: |
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218 | self.archive.seek(0, 0) |
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219 | self.extract_archive() |
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220 | self.check_contents() |
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221 | except ExtractorError: |
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222 | os.chdir(old_path) |
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223 | subprocess.call(['rm', '-rf', self.target]) |
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224 | raise |
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225 | os.chdir(old_path) |
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226 | |
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227 | def get_filenames(self): |
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228 | self.run_pipes() |
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229 | self.archive.seek(0, 0) |
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230 | while True: |
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231 | line = self.archive.readline() |
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232 | if not line: |
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233 | self.archive.close() |
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234 | return |
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235 | yield line.rstrip('\n') |
1 | 236 | |
237 | ||
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238 | class CompressionExtractor(BaseExtractor): |
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239 | name_checker = FilenameChecker |
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240 | |
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241 | def basename(self): |
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242 | pieces = os.path.basename(self.filename).split('.') |
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243 | extension = '.' + pieces[-1] |
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244 | if mimetypes.encodings_map.has_key(extension): |
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245 | pieces.pop() |
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246 | return '.'.join(pieces) |
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247 | |
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248 | def get_filenames(self): |
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249 | yield self.basename() |
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250 | |
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251 | def extract(self): |
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252 | self.content_type = ONE_ENTRY_KNOWN |
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253 | self.content_name = self.basename() |
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254 | output_fd, self.target = tempfile.mkstemp(prefix='.dtrx-', dir='.') |
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255 | try: |
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256 | self.run_pipes(output_fd) |
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257 | except ExtractorError: |
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258 | os.close(output_fd) |
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259 | os.unlink(self.target) |
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260 | raise |
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261 | os.close(output_fd) |
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262 | |
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263 | |
1 | 264 | class TarExtractor(BaseExtractor): |
265 | def get_filenames(self): | |
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266 | self.pipe(['tar', '-t'], "listing") |
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267 | return BaseExtractor.get_filenames(self) |
1 | 268 | |
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269 | def extract_archive(self): |
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270 | self.pipe(['tar', '-x']) |
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271 | self.run_pipes() |
1 | 272 | |
273 | ||
274 | class CpioExtractor(BaseExtractor): | |
275 | def get_filenames(self): | |
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276 | self.pipe(['cpio', '-t'], "listing") |
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277 | return BaseExtractor.get_filenames(self) |
1 | 278 | |
279 | def extract_archive(self): | |
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280 | self.pipe(['cpio', '-i', '--make-directories', |
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281 | '--no-absolute-filenames']) |
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282 | self.run_pipes() |
1 | 283 | |
284 | ||
285 | class RPMExtractor(CpioExtractor): | |
286 | def prepare(self): | |
287 | self.pipe(['rpm2cpio', '-'], "rpm2cpio") | |
288 | ||
289 | def basename(self): | |
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290 | pieces = os.path.basename(self.filename).split('.') |
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291 | if len(pieces) == 1: |
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292 | return pieces[0] |
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293 | elif pieces[-1] != 'rpm': |
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294 | return BaseExtractor.basename(self) |
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295 | pieces.pop() |
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296 | if len(pieces) == 1: |
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297 | return pieces[0] |
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298 | elif len(pieces[-1]) < 8: |
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299 | pieces.pop() |
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300 | return '.'.join(pieces) |
1 | 301 | |
302 | def check_contents(self): | |
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303 | self.check_included_archives(os.listdir('.')) |
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304 | self.content_type = BOMB |
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305 | |
1 | 306 | |
307 | class DebExtractor(TarExtractor): | |
308 | def prepare(self): | |
309 | self.pipe(['ar', 'p', self.filename, 'data.tar.gz'], | |
310 | "data.tar.gz extraction") | |
311 | self.pipe(['zcat'], "data.tar.gz decompression") | |
312 | ||
313 | def basename(self): | |
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314 | pieces = os.path.basename(self.filename).split('_') |
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315 | if len(pieces) == 1: |
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316 | return pieces[0] |
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317 | last_piece = pieces.pop() |
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318 | if (len(last_piece) > 10) or (not last_piece.endswith('.deb')): |
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319 | return BaseExtractor.basename(self) |
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320 | return '_'.join(pieces) |
1 | 321 | |
322 | def check_contents(self): | |
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323 | self.check_included_archives(os.listdir('.')) |
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324 | self.content_type = BOMB |
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325 | |
1 | 326 | |
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327 | class DebMetadataExtractor(DebExtractor): |
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328 | def prepare(self): |
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329 | self.pipe(['ar', 'p', self.filename, 'control.tar.gz'], |
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330 | "control.tar.gz extraction") |
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331 | self.pipe(['zcat'], "control.tar.gz decompression") |
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332 | |
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333 | |
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334 | class GemExtractor(TarExtractor): |
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335 | def prepare(self): |
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336 | self.pipe(['tar', '-xO', 'data.tar.gz'], "data.tar.gz extraction") |
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337 | self.pipe(['zcat'], "data.tar.gz decompression") |
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338 | |
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339 | def check_contents(self): |
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340 | self.check_included_archives(os.listdir('.')) |
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341 | self.content_type = BOMB |
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342 | |
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343 | |
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344 | class GemMetadataExtractor(CompressionExtractor): |
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345 | def prepare(self): |
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346 | self.pipe(['tar', '-xO', 'metadata.gz'], "metadata.gz extraction") |
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347 | self.pipe(['zcat'], "metadata.gz decompression") |
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348 | |
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349 | def basename(self): |
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350 | return os.path.basename(self.filename) + '-metadata.txt' |
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351 | |
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352 | |
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353 | class NoPipeExtractor(BaseExtractor): |
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354 | # Some extraction tools won't accept the archive from stdin. With |
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355 | # these, the piping infrastructure we normally set up generally doesn't |
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356 | # work, at least at first. We can still use most of it; we just can't |
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357 | # seed self.archive with the archive file. So instead we seed it with |
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358 | # /dev/null, and specify the filename on the command line as necessary. |
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359 | # This class doesn't do anything by itself; it's just meant to be a |
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360 | # base class for extractors that rely on these dumb tools. |
32 | 361 | def __init__(self, filename, encoding): |
362 | BaseExtractor.__init__(self, '/dev/null', None) | |
363 | self.filename = os.path.realpath(filename) | |
364 | ||
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365 | |
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366 | class ZipExtractor(NoPipeExtractor): |
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367 | def get_filenames(self): |
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368 | self.pipe(['zipinfo', '-1', self.filename], "listing") |
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369 | return BaseExtractor.get_filenames(self) |
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370 | |
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371 | def extract_archive(self): |
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372 | self.pipe(['unzip', '-q', self.filename]) |
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373 | self.run_pipes() |
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374 | |
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375 | |
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376 | class SevenExtractor(NoPipeExtractor): |
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377 | border_re = re.compile('^[- ]+$') |
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378 | |
32 | 379 | def get_filenames(self): |
380 | self.pipe(['7z', 'l', self.filename], "listing") | |
381 | self.run_pipes() | |
382 | self.archive.seek(0, 0) | |
383 | fn_index = None | |
384 | for line in self.archive: | |
385 | if self.border_re.match(line): | |
386 | if fn_index is not None: | |
387 | break | |
388 | else: | |
389 | fn_index = line.rindex(' ') + 1 | |
390 | elif fn_index is not None: | |
391 | yield line[fn_index:-1] | |
392 | self.archive.close() | |
393 | ||
394 | def extract_archive(self): | |
395 | self.pipe(['7z', 'x', self.filename]) | |
396 | self.run_pipes() | |
397 | ||
398 | ||
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399 | class CABExtractor(NoPipeExtractor): |
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400 | border_re = re.compile(r'^[-\+]+$') |
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401 | |
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402 | def get_filenames(self): |
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403 | self.pipe(['cabextract', '-l', self.filename], "listing") |
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404 | self.run_pipes() |
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405 | self.archive.seek(0, 0) |
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406 | fn_index = None |
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407 | for line in self.archive: |
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408 | if self.border_re.match(line): |
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409 | break |
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410 | for line in self.archive: |
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411 | try: |
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412 | yield line.split(' | ', 2)[2].rstrip('\n') |
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413 | except IndexError: |
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414 | break |
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415 | self.archive.close() |
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416 | |
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417 | def extract_archive(self): |
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418 | self.pipe(['cabextract', '-q', self.filename]) |
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419 | self.run_pipes() |
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420 | |
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421 | |
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422 | class BaseHandler(object): |
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423 | def __init__(self, extractor, options): |
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424 | self.extractor = extractor |
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425 | self.options = options |
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426 | self.target = None |
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427 | |
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428 | def handle(self): |
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429 | command = 'find' |
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430 | status = subprocess.call(['find', self.extractor.target, '-type', 'd', |
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431 | '-exec', 'chmod', 'u+rwx', '{}', ';']) |
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432 | if status == 0: |
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433 | command = 'chmod' |
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434 | status = subprocess.call(['chmod', '-R', 'u+rwX', |
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435 | self.extractor.target]) |
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436 | if status != 0: |
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437 | return "%s returned with exit status %s" % (command, status) |
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438 | return self.organize() |
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439 | |
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440 | |
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441 | # The "where to extract" table, with options and archive types. |
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442 | # This dictates the contents of each can_handle method. |
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443 | # |
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444 | # Flat Overwrite None |
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445 | # File basename basename FilenameChecked |
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446 | # Match . . tempdir + checked |
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447 | # Bomb . basename DirectoryChecked |
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448 | |
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449 | class FlatHandler(BaseHandler): |
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450 | def can_handle(contents, options): |
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451 | return ((options.flat and (contents != ONE_ENTRY_KNOWN)) or |
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452 | (options.overwrite and (contents == MATCHING_DIRECTORY))) |
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453 | can_handle = staticmethod(can_handle) |
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454 | |
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455 | def organize(self): |
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456 | self.target = '.' |
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457 | for curdir, dirs, filenames in os.walk(self.extractor.target, |
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458 | topdown=False): |
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459 | path_parts = curdir.split(os.sep) |
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460 | if path_parts[0] == '.': |
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461 | del path_parts[1] |
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462 | else: |
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463 | del path_parts[0] |
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464 | newdir = os.path.join(*path_parts) |
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465 | if not os.path.isdir(newdir): |
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466 | os.makedirs(newdir) |
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467 | for filename in filenames: |
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468 | os.rename(os.path.join(curdir, filename), |
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469 | os.path.join(newdir, filename)) |
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470 | os.rmdir(curdir) |
16
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471 | |
14
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472 | |
16
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473 | class OverwriteHandler(BaseHandler): |
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474 | def can_handle(contents, options): |
22
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475 | return ((options.flat and (contents == ONE_ENTRY_KNOWN)) or |
16
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476 | (options.overwrite and (contents != MATCHING_DIRECTORY))) |
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477 | can_handle = staticmethod(can_handle) |
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478 | |
28
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479 | def organize(self): |
16
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480 | self.target = self.extractor.basename() |
28
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481 | result = run_command(['rm', '-rf', self.target], |
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482 | "removing %s to overwrite" % (self.target,)) |
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483 | if result is None: |
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484 | os.rename(self.extractor.target, self.target) |
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485 | return result |
16
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486 | |
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487 | |
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488 | class MatchHandler(BaseHandler): |
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489 | def can_handle(contents, options): |
20
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490 | return ((contents == MATCHING_DIRECTORY) or |
22
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491 | ((contents == ONE_ENTRY) and |
25
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492 | options.one_entry_policy.ok_for_match())) |
16
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493 | can_handle = staticmethod(can_handle) |
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494 | |
28
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495 | def organize(self): |
35
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[svn] Add support for extracting CAB archives. Because the CAB archive I was
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496 | source = os.path.join(self.extractor.target, |
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497 | os.listdir(self.extractor.target)[0]) |
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498 | if os.path.isdir(source): |
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499 | checker = DirectoryChecker |
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500 | else: |
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501 | checker = FilenameChecker |
28
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502 | if self.options.one_entry_policy == EXTRACT_HERE: |
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503 | destination = self.extractor.content_name.rstrip('/') |
20
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504 | else: |
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505 | destination = self.extractor.basename() |
35
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506 | self.target = checker(destination).check() |
28
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507 | if os.path.isdir(self.extractor.target): |
35
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diff
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508 | os.rename(source, self.target) |
28
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509 | os.rmdir(self.extractor.target) |
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diff
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510 | else: |
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diff
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511 | os.rename(self.extractor.target, self.target) |
8
97388f5ff770
[svn] Make ExtractorApplication suck less. Now the strategies for handling
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512 | |
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[svn] Make ExtractorApplication suck less. Now the strategies for handling
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513 | |
97388f5ff770
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|
514 | class EmptyHandler(object): |
16
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515 | def can_handle(contents, options): |
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|
516 | return contents == EMPTY |
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517 | can_handle = staticmethod(can_handle) |
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diff
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518 | |
28
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parents:
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diff
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519 | def __init__(self, extractor, options): pass |
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[svn] Change all the license notices from GPLv2 to GPLv3.
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diff
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520 | def handle(self): pass |
8
97388f5ff770
[svn] Make ExtractorApplication suck less. Now the strategies for handling
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diff
changeset
|
521 | |
14
6f9e1bb59719
[svn] Add support for just decompressing files that are compressed. So, if you
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parents:
13
diff
changeset
|
522 | |
16
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diff
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523 | class BombHandler(BaseHandler): |
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[svn] There's now an entirely new object hierarchy for handlers, because the
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parents:
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|
524 | def can_handle(contents, options): |
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[svn] There's now an entirely new object hierarchy for handlers, because the
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parents:
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|
525 | return True |
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[svn] There's now an entirely new object hierarchy for handlers, because the
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parents:
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diff
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|
526 | can_handle = staticmethod(can_handle) |
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diff
changeset
|
527 | |
28
4d88f2231d33
[svn] Change all the license notices from GPLv2 to GPLv3.
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diff
changeset
|
528 | def organize(self): |
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|
529 | basename = self.extractor.basename() |
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|
530 | self.target = self.extractor.name_checker(basename).check() |
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diff
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|
531 | os.rename(self.extractor.target, self.target) |
16
29794d4d41aa
[svn] There's now an entirely new object hierarchy for handlers, because the
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|
532 | |
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parents:
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diff
changeset
|
533 | |
25
ef62f2f55eb8
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diff
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|
534 | class BasePolicy(object): |
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535 | def __init__(self, options): |
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parents:
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diff
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536 | self.current_policy = None |
26 | 537 | if options.batch: |
538 | self.permanent_policy = self.answers[''] | |
539 | else: | |
540 | self.permanent_policy = None | |
25
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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541 | |
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parents:
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diff
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542 | def ask_question(self, question): |
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[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
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diff
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|
543 | question = textwrap.wrap(question) + self.choices |
ef62f2f55eb8
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diff
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|
544 | while True: |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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diff
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|
545 | print "\n".join(question) |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
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diff
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|
546 | try: |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
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diff
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|
547 | answer = raw_input(self.prompt) |
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[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
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diff
changeset
|
548 | except EOFError: |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
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diff
changeset
|
549 | return self.answers[''] |
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parents:
23
diff
changeset
|
550 | try: |
ef62f2f55eb8
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parents:
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diff
changeset
|
551 | return self.answers[answer.lower()] |
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[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
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|
552 | except KeyError: |
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[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
553 | |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
554 | |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
555 | def __cmp__(self, other): |
ef62f2f55eb8
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parents:
23
diff
changeset
|
556 | return cmp(self.current_policy, other) |
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[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
557 | |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
558 | |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
559 | class OneEntryPolicy(BasePolicy): |
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parents:
23
diff
changeset
|
560 | answers = {'h': EXTRACT_HERE, 'i': EXTRACT_WRAP, 'r': EXTRACT_RENAME, |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
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diff
changeset
|
561 | '': EXTRACT_WRAP} |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
562 | choices = ["You can:", |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
563 | " * extract it Inside another directory", |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
564 | " * extract it and Rename the directory", |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
565 | " * extract it Here"] |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
566 | prompt = "What do you want to do? (I/r/h) " |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
567 | |
26 | 568 | def prep(self, archive_filename, entry_name): |
569 | question = ("%s contains one entry: %s." % | |
570 | (archive_filename, entry_name)) | |
571 | self.current_policy = (self.permanent_policy or | |
572 | self.ask_question(question)) | |
25
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
573 | |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
574 | def ok_for_match(self): |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
575 | return self.current_policy in (EXTRACT_RENAME, EXTRACT_HERE) |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
576 | |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
577 | |
ef62f2f55eb8
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parents:
23
diff
changeset
|
578 | class RecursionPolicy(BasePolicy): |
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brett
parents:
23
diff
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|
579 | answers = {'o': RECURSE_ONCE, 'a': RECURSE_ALWAYS, 'n': RECURSE_NOT_NOW, |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
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diff
changeset
|
580 | 'v': RECURSE_NEVER, '': RECURSE_NOT_NOW} |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
581 | choices = ["You can:", |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
582 | " * Always extract included archives", |
ef62f2f55eb8
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brett
parents:
23
diff
changeset
|
583 | " * extract included archives this Once", |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
584 | " * choose Not to extract included archives", |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
585 | " * neVer extract included archives"] |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
586 | prompt = "What do you want to do? (a/o/N/v) " |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
587 | |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
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diff
changeset
|
588 | def __init__(self, options): |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
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diff
changeset
|
589 | BasePolicy.__init__(self, options) |
31
c3a2760d1c3a
[svn] Refactor actions (extract the archive, vs. list the contents) into their
brett
parents:
30
diff
changeset
|
590 | if options.show_list: |
c3a2760d1c3a
[svn] Refactor actions (extract the archive, vs. list the contents) into their
brett
parents:
30
diff
changeset
|
591 | self.permanent_policy = RECURSE_NEVER |
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[svn] Refactor actions (extract the archive, vs. list the contents) into their
brett
parents:
30
diff
changeset
|
592 | elif options.recursive: |
25
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
593 | self.permanent_policy = RECURSE_ALWAYS |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
594 | |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
595 | def prep(self, current_filename, included_archives): |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
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parents:
23
diff
changeset
|
596 | archive_count = len(included_archives) |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
597 | if (self.permanent_policy is not None) or (archive_count == 0): |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
598 | self.current_policy = self.permanent_policy or RECURSE_NOT_NOW |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
599 | return |
ef62f2f55eb8
[svn] Move policy-handling code into a dedicated set of classes. This makes
brett
parents:
23
diff
changeset
|
600 | elif archive_count > 1: |
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601 | question = ("%s contains %s other archive files." % |
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602 | (current_filename, archive_count)) |
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603 | else: |
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604 | question = ("%s contains another archive: %s." % |
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605 | (current_filename, included_archives[0])) |
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606 | self.current_policy = self.ask_question(question) |
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607 | if self.current_policy in (RECURSE_ALWAYS, RECURSE_NEVER): |
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608 | self.permanent_policy = self.current_policy |
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609 | |
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610 | def ok_to_recurse(self): |
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611 | return self.current_policy in (RECURSE_ALWAYS, RECURSE_ONCE) |
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612 | |
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613 | |
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614 | class ExtractorBuilder(object): |
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615 | extractor_map = {'tar': (TarExtractor, None), |
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616 | 'zip': (ZipExtractor, None), |
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617 | 'deb': (DebExtractor, DebMetadataExtractor), |
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618 | 'rpm': (RPMExtractor, None), |
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619 | 'cpio': (CpioExtractor, None), |
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620 | 'gem': (GemExtractor, GemMetadataExtractor), |
32 | 621 | 'compress': (CompressionExtractor, None), |
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622 | '7z': (SevenExtractor, None), |
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623 | 'cab': (CABExtractor, None)} |
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624 | |
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625 | mimetype_map = {} |
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626 | for mapping in (('tar', 'x-tar'), |
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627 | ('zip', 'x-msdos-program', 'zip'), |
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628 | ('deb', 'x-debian-package'), |
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629 | ('rpm', 'x-redhat-package-manager', 'x-rpm'), |
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630 | ('cpio', 'x-cpio'), |
32 | 631 | ('gem', 'x-ruby-gem'), |
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632 | ('7z', 'x-7z-compressed'), |
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633 | ('cab', 'x-cab')): |
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634 | for mimetype in mapping[1:]: |
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635 | if '/' not in mimetype: |
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636 | mimetype = 'application/' + mimetype |
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637 | mimetype_map[mimetype] = mapping[0] |
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638 | |
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639 | magic_mime_map = {} |
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640 | for mapping in (('deb', 'Debian binary package'), |
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641 | ('cpio', 'cpio archive'), |
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642 | ('tar', 'POSIX tar archive'), |
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643 | ('zip', 'Zip archive'), |
32 | 644 | ('rpm', 'RPM'), |
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645 | ('7z', '7-zip archive'), |
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646 | ('cab', 'Microsoft Cabinet archive')): |
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647 | for pattern in mapping[1:]: |
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648 | magic_mime_map[re.compile(pattern)] = mapping[0] |
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649 | |
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650 | magic_encoding_map = {} |
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651 | for mapping in (('bzip2', 'bzip2 compressed'), |
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652 | ('gzip', 'gzip compressed')): |
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653 | for pattern in mapping[1:]: |
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654 | magic_encoding_map[re.compile(pattern)] = mapping[0] |
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655 | |
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656 | extension_map = {} |
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657 | for mapping in (('tar', 'bzip2', 'tar.bz2'), |
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658 | ('tar', 'gzip', 'tar.gz', 'tgz'), |
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659 | ('tar', None, 'tar'), |
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660 | ('zip', None, 'zip', 'exe'), |
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661 | ('deb', None, 'deb'), |
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662 | ('rpm', None, 'rpm'), |
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663 | ('cpio', None, 'cpio'), |
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664 | ('gem', None, 'gem'), |
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665 | ('compress', 'gzip', 'Z', 'gz'), |
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666 | ('compress', 'bzip2', 'bz2'), |
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667 | ('compress', 'lzma', 'lzma'), |
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668 | ('7z', None, '7z'), |
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669 | ('cab', None, 'cab', 'exe')): |
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670 | for extension in mapping[2:]: |
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671 | extension_map.setdefault(extension, []).append(mapping[:2]) |
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672 | |
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673 | def __init__(self, filename, options): |
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674 | self.filename = filename |
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675 | self.options = options |
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676 | |
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677 | def build_extractor(self, archive_type, encoding): |
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678 | extractors = self.extractor_map[archive_type] |
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679 | if self.options.metadata and (extractors[1] is not None): |
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680 | extractor = extractors[1] |
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681 | else: |
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682 | extractor = extractors[0] |
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683 | return extractor(self.filename, encoding) |
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684 | |
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685 | def get_extractor(self): |
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686 | tried_types = Set() |
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687 | # As smart as it is, the magic test can't go first, because at least |
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688 | # on my system it just recognizes gem files as tar files. I guess |
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689 | # it's possible for the opposite problem to occur -- where the mimetype |
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690 | # or extension suggests something less than ideal -- but it seems less |
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691 | # likely so I'm sticking with this. |
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692 | for func_name in ('mimetype', 'extension', 'magic'): |
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693 | logger.debug("getting extractors by %s" % (func_name,)) |
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694 | extractor_types = \ |
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695 | getattr(self, 'try_by_' + func_name)(self.filename) |
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696 | logger.debug("done getting extractors") |
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697 | for ext_args in extractor_types: |
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698 | if ext_args in tried_types: |
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699 | continue |
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700 | tried_types.add(ext_args) |
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701 | logger.debug("trying %s extractor from %s" % |
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702 | (ext_args, func_name)) |
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703 | yield self.build_extractor(*ext_args) |
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704 | |
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705 | def try_by_mimetype(cls, filename): |
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706 | mimetype, encoding = mimetypes.guess_type(filename) |
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707 | try: |
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708 | return [(cls.mimetype_map[mimetype], encoding)] |
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709 | except KeyError: |
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710 | if encoding: |
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711 | return [('compress', encoding)] |
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712 | return [] |
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713 | try_by_mimetype = classmethod(try_by_mimetype) |
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714 | |
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715 | def magic_map_matches(cls, output, magic_map): |
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716 | return [result for regexp, result in magic_map.items() |
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717 | if regexp.search(output)] |
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718 | magic_map_matches = classmethod(magic_map_matches) |
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719 | |
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720 | def try_by_magic(cls, filename): |
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721 | process = subprocess.Popen(['file', '-z', filename], |
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722 | stdout=subprocess.PIPE) |
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723 | status = process.wait() |
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724 | if status != 0: |
35
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725 | return [] |
30
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726 | output = process.stdout.readline() |
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727 | process.stdout.close() |
31
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728 | if output.startswith('%s: ' % filename): |
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729 | output = output[len(filename) + 2:] |
35
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730 | mimes = cls.magic_map_matches(output, cls.magic_mime_map) |
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731 | encodings = cls.magic_map_matches(output, cls.magic_encoding_map) |
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732 | if mimes and not encodings: |
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733 | encodings = [None] |
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734 | elif encodings and not mimes: |
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735 | mimes = ['compress'] |
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736 | return [(m, e) for m in mimes for e in encodings] |
31
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737 | try_by_magic = classmethod(try_by_magic) |
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738 | |
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739 | def try_by_extension(cls, filename): |
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740 | parts = filename.rsplit('.', 2)[1:] |
35
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741 | results = [] |
31
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742 | while parts: |
35
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743 | results.extend(cls.extension_map.get('.'.join(parts), [])) |
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744 | del parts[0] |
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745 | return results |
31
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746 | try_by_extension = classmethod(try_by_extension) |
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747 | |
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748 | |
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749 | class BaseAction(object): |
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750 | def __init__(self, options, filenames): |
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751 | self.options = options |
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752 | self.filenames = filenames |
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753 | self.target = None |
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754 | |
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755 | def report(self, function, *args): |
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756 | try: |
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|
757 | error = function(*args) |
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758 | except (ExtractorError, IOError, OSError), exception: |
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|
759 | error = str(exception) |
33
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760 | logger.debug(''.join(traceback.format_exception(*sys.exc_info()))) |
31
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761 | if error: |
33
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762 | logger.info("%s: %s", self.current_filename, error) |
31
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763 | return False |
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764 | return True |
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|
765 | |
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766 | |
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767 | class ExtractionAction(BaseAction): |
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768 | handlers = [FlatHandler, OverwriteHandler, MatchHandler, EmptyHandler, |
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769 | BombHandler] |
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770 | |
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771 | def get_handler(self, extractor): |
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772 | if extractor.content_type == ONE_ENTRY: |
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773 | self.options.one_entry_policy.prep(self.current_filename, |
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774 | extractor.content_name) |
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775 | for handler in self.handlers: |
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|
776 | if handler.can_handle(extractor.content_type, self.options): |
35
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777 | logger.debug("using %s handler" % (handler.__name__,)) |
31
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778 | self.current_handler = handler(extractor, self.options) |
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779 | break |
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780 | |
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781 | def run(self, filename, extractor): |
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782 | self.current_filename = filename |
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783 | success = (self.report(extractor.extract) and |
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784 | self.report(self.get_handler, extractor) and |
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785 | self.report(self.current_handler.handle)) |
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786 | if success: |
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787 | self.target = self.current_handler.target |
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788 | return success |
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|
789 | |
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790 | |
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791 | class ListAction(BaseAction): |
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792 | def __init__(self, options, filenames): |
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793 | BaseAction.__init__(self, options, filenames) |
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794 | |
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795 | def get_list(self, extractor): |
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796 | # Note: The reason I'm getting all the filenames up front is |
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797 | # because if we run into trouble partway through the archive, we'll |
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798 | # try another extractor. So before we display anything we have to |
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799 | # be sure this one is successful. We maybe don't have to be quite |
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800 | # this conservative but this is the easy way out for now. |
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801 | self.filelist = list(extractor.get_filenames()) |
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802 | |
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|
803 | def show_list(self, filename): |
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804 | if len(self.filenames) != 1: |
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|
805 | if filename != self.filenames[0]: |
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|
806 | |
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807 | print "%s:" % (filename,) |
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|
808 | print '\n'.join(self.filelist) |
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809 | |
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810 | def run(self, filename, extractor): |
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|
811 | self.current_filename = filename |
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812 | return (self.report(self.get_list, extractor) and |
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|
813 | self.report(self.show_list, filename)) |
29
5fad99c17221
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diff
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|
814 | |
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815 | |
5 | 816 | class ExtractorApplication(object): |
817 | def __init__(self, arguments): | |
6
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|
818 | self.parse_options(arguments) |
12
5d202467c589
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|
819 | self.setup_logger() |
5 | 820 | self.successes = [] |
821 | self.failures = [] | |
822 | ||
6
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823 | def parse_options(self, arguments): |
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|
824 | parser = optparse.OptionParser( |
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|
825 | usage="%prog [options] archive [archive2 ...]", |
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|
826 | description="Intelligent archive extractor", |
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|
827 | version=VERSION_BANNER |
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|
828 | ) |
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|
829 | parser.add_option('-r', '--recursive', dest='recursive', |
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|
830 | action='store_true', default=False, |
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|
831 | help='extract archives contained in the ones listed') |
13
0a3ef1b9f6d4
[svn] Add options to tweak the logging level to taste.
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diff
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|
832 | parser.add_option('-q', '--quiet', dest='quiet', |
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|
833 | action='count', default=3, |
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|
834 | help='suppress warning/error messages') |
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835 | parser.add_option('-v', '--verbose', dest='verbose', |
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|
836 | action='count', default=0, |
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|
837 | help='be verbose/print debugging information') |
14
6f9e1bb59719
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parents:
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diff
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|
838 | parser.add_option('-o', '--overwrite', dest='overwrite', |
6f9e1bb59719
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diff
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|
839 | action='store_true', default=False, |
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diff
changeset
|
840 | help='overwrite any existing target directory') |
15
28dbd52a8bb8
[svn] Add a -f/--flat option, which will extract the archive contents into the
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parents:
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diff
changeset
|
841 | parser.add_option('-f', '--flat', '--no-directory', dest='flat', |
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diff
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|
842 | action='store_true', default=False, |
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changeset
|
843 | help="don't put contents in their own directory") |
19 | 844 | parser.add_option('-l', '-t', '--list', '--table', dest='show_list', |
845 | action='store_true', default=False, | |
846 | help="list contents of archives on standard output") | |
20
69c93c3e6972
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diff
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847 | parser.add_option('-n', '--noninteractive', dest='batch', |
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848 | action='store_true', default=False, |
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849 | help="don't ask how to handle special cases") |
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850 | parser.add_option('-m', '--metadata', dest='metadata', |
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851 | action='store_true', default=False, |
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852 | help="extract metadata from a .deb/.gem") |
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853 | self.options, filenames = parser.parse_args(arguments) |
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854 | if not filenames: |
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855 | parser.error("you did not list any archives") |
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856 | self.options.one_entry_policy = OneEntryPolicy(self.options) |
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857 | self.options.recursion_policy = RecursionPolicy(self.options) |
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858 | self.archives = {os.path.realpath(os.curdir): filenames} |
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859 | |
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860 | def setup_logger(self): |
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861 | # WARNING is the default. |
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862 | log_level = (10 * (self.options.quiet - self.options.verbose)) |
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863 | logging.getLogger().setLevel(log_level) |
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864 | handler = logging.StreamHandler() |
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865 | handler.setLevel(log_level) |
19 | 866 | formatter = logging.Formatter("dtrx: %(levelname)s: %(message)s") |
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867 | handler.setFormatter(formatter) |
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868 | logger.addHandler(handler) |
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869 | logger.debug("logger is set up") |
1 | 870 | |
31
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871 | def recurse(self, filename, extractor, action): |
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872 | archives = extractor.included_archives |
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873 | self.options.recursion_policy.prep(filename, archives) |
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874 | if self.options.recursion_policy.ok_to_recurse(): |
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875 | for filename in archives: |
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876 | tail_path, basename = os.path.split(filename) |
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877 | directory = os.path.join(self.current_directory, |
31
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878 | action.target, tail_path) |
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879 | self.archives.setdefault(directory, []).append(basename) |
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880 | |
19 | 881 | def run(self): |
882 | if self.options.show_list: | |
31
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883 | action = ListAction |
19 | 884 | else: |
31
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885 | action = ExtractionAction |
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886 | action = action(self.options, self.archives.values()[0]) |
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887 | while self.archives: |
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888 | self.current_directory, self.filenames = self.archives.popitem() |
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889 | os.chdir(self.current_directory) |
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890 | for filename in self.filenames: |
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891 | builder = ExtractorBuilder(filename, self.options) |
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892 | for extractor in builder.get_extractor(): |
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893 | if action.run(filename, extractor): |
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894 | self.successes.append(filename) |
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895 | self.recurse(filename, extractor, action) |
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896 | break |
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897 | else: |
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898 | logger.error("%s: could not find a way to extract this" % |
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899 | (filename,)) |
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900 | self.failures.append(filename) |
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901 | self.options.one_entry_policy.permanent_policy = EXTRACT_WRAP |
5 | 902 | if self.failures: |
903 | return 1 | |
904 | return 0 | |
905 | ||
1 | 906 | |
907 | if __name__ == '__main__': | |
5 | 908 | app = ExtractorApplication(sys.argv[1:]) |
909 | sys.exit(app.run()) |