[source storage] refactor source sql generation and results handling to allow repository side callbacks for instance with the BytesFileSystemStorage, before this change: * fspath, _fsopen function were stored procedures executed on the database -> files had to be available both on the repository *and* the database host * we needed implementation for each handled database Now, those function are python callbacks executed when necessary on the repository side, on data comming from the database. The litle cons are: * you can't do anymore restriction on mapped attributes * you can't write queries which will return in the same rset column some mapped attributes (or not mapped the same way) / some not This seems much acceptable since: * it's much more easy to handle when you start having the db on another host than the repo * BFSS works seemlessly on any backend now * you don't bother that much about the cons (at least in the bfss case): you usually don't do any restriction on Bytes... Bonus points: BFSS is more efficient (no queries under the cover as it was done in the registered procedure) and we have a much nicer/efficient fspath implementation. IMO, that rocks :D

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#!/usr/bin/python

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"""usage: fix-po-encodings [filename...]

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change the encoding of the po files passed as arguments to utf-8

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"""

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import sys

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import re

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import codecs

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def change_encoding(filename, target='UTF-8'):

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    fdesc = open(filename)

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    data = fdesc.read()

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    fdesc.close()

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    encoding = find_encoding(data)

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    if encoding == target:

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        return

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    data = fix_encoding(data, target)

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    data = unicode(data, encoding)

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    fdesc = codecs.open(filename, 'wb', encoding=target)

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    fdesc.write(data)

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    fdesc.close()

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def find_encoding(data):

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    regexp = re.compile(r'"Content-Type:.* charset=([a-zA-Z0-9-]+)\\n"', re.M)

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    mo = regexp.search(data)

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    if mo is None:

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        raise ValueError('No encoding declaration')

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    return mo.group(1)

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def fix_encoding(data, target_encoding):

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    regexp = re.compile(r'("Content-Type:.* charset=)(.*)(\\n")', re.M)

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    return regexp.sub(r'\1%s\3' % target_encoding, data)

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for filename in sys.argv[1:]:

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    print filename

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    change_encoding(filename)