patch: use temporary files to handle intermediate copies git patches may require copies to be handled out-of-order. For instance, take the following sequence: * modify a * copy a into b Here, we have to generate b from a before its modification. To do so, applydiff() was scanning for copy metadata and performing the copies before processing the other changes in-order. While smart and efficient, this approach complicates things by handling file copies and file creations at different places and times. While a new file must not exist before being patched a copied file already exists before applying the first hunk. Instead of copying the files at their final destination before patching, we store them in a temporary file location and retrieve them when patching. The filestore always stores file content in real files but nothing prevents adding a cache layer. The filestore class was kept separate from fsbackend for at least two reasons: - This class is likely to be reused as a temporary result store for a future repository patching call (entries just have to be extended to contain copy sources). - Delegating this role to backends might be more efficient in a repository backend case: the source files are already available in the repository itself and do not need to be copied again. It also means that third-parties backend would have to implement two other methods. If we ever decide to merge the filestore feature into backend, a minimalistic approach would be to compose with filestore directly. Keep in mind this copy overhead only applies for copy/rename sources, and may even be reduced to copy sources which have to handled ahead of time. [ original upstream message ]

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#!/usr/bin/env python

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# $Id$

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from distutils.core import setup

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import os, time

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# specify version, Mercurial version otherwise

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version = ''

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unknown_version = 'unknown'

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def getversion():

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    global version, unknown_version

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    if not version and os.path.isdir('.hg'):

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        p = os.popen('hg --quiet identify 2> %s' % os.devnull)

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        ident = p.read()[:-1]

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        if not p.close() and ident:

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            if ident[-1] != '+':

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                version = ident

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            else:

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                version = ident[:-1]

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                version += time.strftime('+%Y%m%d')

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    return version or unknown_version

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setup(name='hgkw',

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      version=getversion(),

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      description='Mercurial keyword extension (standalone)',

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      author='Christian Ebert',

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      author_email='blacktrash@gmx.net',

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      url='http://www.blacktrash.org/hg/hgkeyword/',

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      license='GNU GPL',

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      packages=['hgkw'])