+++ /dev/null
-import cStringIO
-from hashlib import md5, sha1
-import os
-
-from compress.conf import settings
-from compress.utils import concat, get_output_filename
-from compress.versioning.base import VersioningBase
-
-
-class HashVersioningBase(VersioningBase):
-
- def __init__(self, hash_method):
- self.hash_method = hash_method
-
- def needs_update(self, output_file, source_files, version):
- output_file_name = get_output_filename(output_file, version)
- ph = settings.COMPRESS_VERSION_PLACEHOLDER
- of = output_file
- try:
- phi = of.index(ph)
- old_version = output_file_name[phi:phi + len(ph) - len(of)]
- return (version != old_version), version
- except ValueError:
- # no placeholder found, do not update, manual update if needed
- return False, version
-
- def get_version(self, source_files):
- buf = concat(source_files)
- s = cStringIO.StringIO(buf)
- version = self.get_hash(s)
- s.close()
- return version
-
- def get_hash(self, f, CHUNK=2 ** 16):
- m = self.hash_method()
- while 1:
- chunk = f.read(CHUNK)
- if not chunk:
- break
- m.update(chunk)
- return m.hexdigest()
-
-
-class MD5Versioning(HashVersioningBase):
-
- def __init__(self):
- super(MD5Versioning, self).__init__(md5)
-
-
-class SHA1Versioning(HashVersioningBase):
-
- def __init__(self):
- super(SHA1Versioning, self).__init__(sha1)