Mercurial > ~astiob > upreckon > hgweb
annotate upreckon/files.py @ 196:67088c1765b4
Regexps now work with test archives
Excuse me while I rewrite files.{File,regexp} almost from scratch...
| author | Oleg Oshmyan <chortos@inbox.lv> |
|---|---|
| date | Mon, 15 Aug 2011 19:52:58 +0300 |
| parents | c2490e39fd70 |
| children | 79f4f2fdeead |
| rev | line source |
|---|---|
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Updated copyright years in files.py
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1 # Copyright (c) 2010-2011 Chortos-2 <chortos@inbox.lv> |
| 16 | 2 |
| 21 | 3 """File access routines and classes with support for archives.""" |
| 4 | |
| 5 from __future__ import division, with_statement | |
| 6 | |
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7 from .compat import * |
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8 import contextlib, itertools, os, posixpath, re, shutil, sys |
| 21 | 9 |
| 10 # You don't need to know about anything else. | |
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11 __all__ = 'File', 'regexp' |
| 21 | 12 |
| 13 # In these two variables, use full stops no matter what os.extsep is; | |
| 14 # all full stops will be converted to os.extsep on the fly | |
| 15 archives = 'tests.tar', 'tests.zip', 'tests.tgz', 'tests.tar.gz', 'tests.tbz2', 'tests.tar.bz2' | |
| 16 formats = {} | |
| 17 | |
| 18 class Archive(object): | |
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19 __slots__ = () |
| 21 | 20 |
| 21 if ABCMeta: | |
| 22 __metaclass__ = ABCMeta | |
| 23 | |
| 24 def __new__(cls, path): | |
| 25 """ | |
| 26 Create a new instance of the archive class corresponding | |
| 27 to the file name in the given path. | |
| 28 """ | |
| 29 if cls is not Archive: | |
| 30 return object.__new__(cls) | |
| 31 else: | |
| 32 # Do this by hand rather than through os.path.splitext | |
| 33 # because we support multi-dotted file name extensions | |
| 34 ext = path.partition(os.path.extsep)[2] | |
| 35 while ext: | |
| 36 if ext in formats: | |
| 37 return formats[ext](path) | |
| 38 ext = ext.partition(os.path.extsep)[2] | |
| 39 raise LookupError("unsupported archive file name extension in file name '%s'" % filename) | |
| 40 | |
| 41 @abstractmethod | |
| 42 def __init__(self, path): raise NotImplementedError | |
| 43 | |
| 44 @abstractmethod | |
| 45 def extract(self, name, target): raise NotImplementedError | |
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46 |
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47 @abstractmethod |
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48 def open(self, name): raise NotImplementedError |
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49 |
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50 @abstractmethod |
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51 def exists(self, name): raise NotImplementedError |
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52 |
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53 @abstractmethod |
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54 def listdir(self, name): raise NotImplementedError |
| 16 | 55 |
| 21 | 56 try: |
| 57 import tarfile | |
| 31 | 58 except ImportError: |
| 59 TarArchive = None | |
| 60 else: | |
| 21 | 61 class TarArchive(Archive): |
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62 __slots__ = '_tarfile', '_files', '_dirs', '_names' |
| 21 | 63 |
| 64 def __init__(self, path): | |
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65 self._tarfile = tarfile.open(path) |
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66 files, dirs = {}, set(('/',)) |
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67 for member in self._tarfile.getmembers(): |
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68 cutname = posixpath.normpath('/' + member.name) |
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69 if cutname == '/': |
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70 continue |
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71 if member.isfile(): |
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72 files[cutname] = member |
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73 cutname = posixpath.dirname(cutname) |
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74 elif not member.isdir(): |
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75 continue |
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76 while cutname != '/': |
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77 dirs.add(cutname) |
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78 cutname = posixpath.dirname(cutname) |
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79 self._files = files |
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80 self._dirs = frozenset(dirs) |
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81 self._names = self._dirs | frozenset(files) |
| 21 | 82 |
| 83 def extract(self, name, target): | |
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84 member = self._files[posixpath.normpath('/' + name)] |
| 21 | 85 member.name = target |
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86 self._tarfile.extract(member) |
| 21 | 87 |
| 88 def open(self, name): | |
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89 name = posixpath.normpath('/' + name) |
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90 return self._tarfile.extractfile(self._files[name]) |
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91 |
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92 def exists(self, name): |
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93 return posixpath.normpath('/' + name) in self._names |
| 21 | 94 |
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95 def listdir(self, name): |
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96 normname = posixpath.normpath('/' + name) |
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97 if normname not in self._dirs: |
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98 raise KeyError('No such directory: %r' % name) |
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99 if normname != '/': |
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100 normname += '/' |
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101 nnlen = len(normname) |
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102 return [fname[nnlen:] for fname in self._names |
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103 if fname.startswith(normname) and |
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104 fname.find('/', nnlen) == -1] |
| 21 | 105 |
| 106 def __enter__(self): | |
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107 if hasattr(self._tarfile, '__enter__'): |
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108 self._tarfile.__enter__() |
| 21 | 109 return self |
| 110 | |
| 111 def __exit__(self, exc_type, exc_value, traceback): | |
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112 if hasattr(self._tarfile, '__exit__'): |
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113 return self._tarfile.__exit__(exc_type, exc_value, traceback) |
| 21 | 114 elif exc_type is None: |
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115 self._tarfile.close() |
| 21 | 116 else: |
| 117 # This code was shamelessly copied from tarfile.py of Python 2.7 | |
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118 if not self._tarfile._extfileobj: |
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119 self._tarfile.fileobj.close() |
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120 self._tarfile.closed = True |
| 21 | 121 |
| 122 formats['tar'] = formats['tgz'] = formats['tar.gz'] = formats['tbz2'] = formats['tar.bz2'] = TarArchive | |
| 123 | |
| 124 try: | |
| 125 import zipfile | |
| 31 | 126 except ImportError: |
| 127 ZipArchive = None | |
| 128 else: | |
| 21 | 129 class ZipArchive(Archive): |
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130 __slots__ = '_zipfile', '_files', '_dirs', '_names' |
| 21 | 131 |
| 132 def __init__(self, path): | |
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133 self._zipfile = zipfile.ZipFile(path) |
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134 files, dirs = {}, set(('/',)) |
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135 for member in self._zipfile.infolist(): |
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136 cutname = posixpath.normpath('/' + member.filename) |
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137 if cutname == '/': |
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138 continue |
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139 if not member.filename.endswith('/'): |
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140 files[cutname] = member |
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141 cutname = posixpath.dirname(cutname) |
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142 while cutname != '/': |
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143 dirs.add(cutname) |
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144 cutname = posixpath.dirname(cutname) |
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145 self._files = files |
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146 self._dirs = frozenset(dirs) |
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147 self._names = self._dirs | frozenset(files) |
| 21 | 148 |
| 149 def extract(self, name, target): | |
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150 member = self._files[posixpath.normpath('/' + name)] |
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151 # FIXME: 2.5 lacks ZipFile.extract |
| 21 | 152 if os.path.isabs(target): |
| 153 # To my knowledge, this is as portable as it gets | |
| 154 path = os.path.join(os.path.splitdrive(target)[0], os.path.sep) | |
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155 member.filename = os.path.relpath(target, path) |
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156 self._zipfile.extract(member, path) |
| 21 | 157 else: |
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158 member.filename = os.path.relpath(target) |
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159 self._zipfile.extract(member) |
| 21 | 160 |
| 161 def open(self, name): | |
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162 name = posixpath.normpath('/' + name) |
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163 # FIXME: 2.5 lacks ZipFile.open |
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164 return self._zipfile.open(self._files[name]) |
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165 |
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166 def exists(self, name): |
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167 return posixpath.normpath('/' + name) in self._names |
| 21 | 168 |
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169 def listdir(self, name): |
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170 normname = posixpath.normpath('/' + name) |
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171 if normname not in self._dirs: |
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172 raise KeyError('No such directory: %r' % name) |
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173 if normname != '/': |
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174 normname += '/' |
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175 nnlen = len(normname) |
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176 return [fname[nnlen:] for fname in self._names |
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177 if fname.startswith(normname) and |
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178 fname.find('/', nnlen) == -1] |
| 21 | 179 |
| 180 def __enter__(self): | |
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181 if hasattr(self._zipfile, '__enter__'): |
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182 self._zipfile.__enter__() |
| 21 | 183 return self |
| 184 | |
| 185 def __exit__(self, exc_type, exc_value, traceback): | |
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186 if hasattr(self._zipfile, '__exit__'): |
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187 return self._zipfile.__exit__(exc_type, exc_value, traceback) |
| 21 | 188 else: |
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189 return self._zipfile.close() |
| 21 | 190 |
| 191 formats['zip'] = ZipArchive | |
| 192 | |
| 193 # Remove unsupported archive formats and replace full stops | |
| 194 # with the platform-dependent file name extension separator | |
| 195 def issupported(filename, formats=formats): | |
| 196 ext = filename.partition('.')[2] | |
| 197 while ext: | |
| 198 if ext in formats: return True | |
| 199 ext = ext.partition('.')[2] | |
| 200 return False | |
| 201 archives = [filename.replace('.', os.path.extsep) for filename in filter(issupported, archives)] | |
| 202 formats = dict((item[0].replace('.', os.path.extsep), item[1]) for item in items(formats)) | |
| 203 | |
| 204 open_archives = {} | |
| 205 | |
| 206 def open_archive(path): | |
| 207 if path in open_archives: | |
| 208 return open_archives[path] | |
| 209 else: | |
| 210 open_archives[path] = archive = Archive(path) | |
| 211 return archive | |
| 16 | 212 |
| 21 | 213 class File(object): |
| 214 __slots__ = 'virtual_path', 'real_path', 'full_real_path', 'archive' | |
| 215 | |
| 216 def __init__(self, virtpath, allow_root=False, msg='test data'): | |
| 217 self.virtual_path = virtpath | |
| 218 self.archive = None | |
| 219 if not self.realize_path('', tuple(comp.replace('.', os.path.extsep) for comp in virtpath.split('/')), allow_root): | |
| 220 raise IOError("%s file '%s' could not be found" % (msg, virtpath)) | |
| 221 | |
| 222 def realize_path(self, root, virtpath, allow_root=False, hastests=False): | |
| 223 if root and not os.path.exists(root): | |
| 224 return False | |
| 225 if len(virtpath) > 1: | |
| 226 if self.realize_path(os.path.join(root, virtpath[0]), virtpath[1:], allow_root, hastests): | |
| 227 return True | |
| 228 elif not hastests: | |
| 229 if self.realize_path(os.path.join(root, 'tests'), virtpath, allow_root, True): | |
| 230 return True | |
| 231 for archive in archives: | |
| 232 path = os.path.join(root, archive) | |
| 233 if os.path.exists(path): | |
| 234 if self.realize_path_archive(open_archive(path), '', virtpath, path): | |
| 235 return True | |
| 23 | 236 if self.realize_path(root, virtpath[1:], allow_root, hastests): |
| 21 | 237 return True |
| 238 else: | |
| 239 if not hastests: | |
| 240 path = os.path.join(root, 'tests', virtpath[0]) | |
| 241 if os.path.exists(path): | |
| 242 self.full_real_path = self.real_path = path | |
| 243 return True | |
| 244 for archive in archives: | |
| 245 path = os.path.join(root, archive) | |
| 246 if os.path.exists(path): | |
| 247 if self.realize_path_archive(open_archive(path), '', virtpath, path): | |
| 248 return True | |
| 249 if hastests or allow_root: | |
| 250 path = os.path.join(root, virtpath[0]) | |
| 251 if os.path.exists(path): | |
| 252 self.full_real_path = self.real_path = path | |
| 253 return True | |
| 254 return False | |
| 255 | |
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256 def realize_path_archive(self, archive, root, virtpath, archpath, hastests=False): |
| 21 | 257 if root and not archive.exists(root): |
| 258 return False | |
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259 path = posixpath.join(root, virtpath[0]) |
| 21 | 260 if len(virtpath) > 1: |
| 261 if self.realize_path_archive(archive, path, virtpath[1:], archpath): | |
| 262 return True | |
| 263 elif self.realize_path_archive(archive, root, virtpath[1:], archpath): | |
| 264 return True | |
| 265 else: | |
| 266 if archive.exists(path): | |
| 267 self.archive = archive | |
| 268 self.real_path = path | |
| 269 self.full_real_path = os.path.join(archpath, *path.split('/')) | |
| 270 return True | |
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271 if not hastests: |
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272 if self.realize_path_archive(archive, posixpath.join(root, 'tests'), virtpath, archpath, True): |
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273 return True |
| 21 | 274 return False |
| 275 | |
| 276 def open(self): | |
| 277 if self.archive: | |
| 278 file = self.archive.open(self.real_path) | |
| 279 if hasattr(file, '__exit__'): | |
| 280 return file | |
| 281 else: | |
| 282 return contextlib.closing(file) | |
| 283 else: | |
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284 return open(self.real_path, 'rb') |
| 21 | 285 |
| 286 def copy(self, target): | |
| 287 if self.archive: | |
| 288 self.archive.extract(self.real_path, target) | |
| 289 else: | |
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290 shutil.copy(self.real_path, target) |
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291 |
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292 class RegexpMatchFile(object): |
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293 __slots__ = 'virtual_path', 'real_path', 'hastests', 'archive' |
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294 |
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295 def __init__(self, virtual_path, real_path, hastests=False, archive=None): |
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296 self.virtual_path = virtual_path |
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297 self.real_path = real_path |
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298 self.hastests = hastests |
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299 self.archive = archive |
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300 |
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301 def regexp(pattern): |
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302 if not pattern: |
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303 yield RegexpMatchFile('', os.curdir) |
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304 return |
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305 dirname, basename = posixpath.split(pattern) |
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306 dirs = regexp(dirname) |
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307 reobj = re.compile(pattern + '$', re.UNICODE) |
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308 while dirs: |
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309 newdirs = [] |
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310 for directory in dirs: |
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311 if directory.archive: |
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312 try: |
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313 names = directory.archive.listdir(directory.real_path) |
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314 except KeyError: |
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315 continue |
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316 join = posixpath.join |
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317 else: |
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318 try: |
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319 names = os.listdir(directory.real_path) |
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320 except OSError: |
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321 continue |
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322 join = posixpath.join |
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323 for name in names: |
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324 path = join(directory.real_path, name) |
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325 vpath = posixpath.join(directory.virtual_path, name) |
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326 if re.match(reobj, vpath): |
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327 yield RegexpMatchFile(vpath, path, directory.hastests, directory.archive) |
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328 if not directory.hastests: |
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329 if name == 'tests': |
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330 newdirs.append(RegexpMatchFile(directory.virtual_path, path, True, directory.archive)) |
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331 if not directory.archive and name in archives: |
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332 newdirs.append(RegexpMatchFile(directory.virtual_path, '', False, open_archive(path))) |
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333 dirs = newdirs |