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# Copyright (C) 2010-2012 Linaro Limited
#
# Author: Zygmunt Krynicki <zygmunt.krynicki@linaro.org>
#
# This file is part of versiontools.
#
# versiontools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# as published by the Free Software Foundation
#
# versiontools is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with versiontools. If not, see <http://www.gnu.org/licenses/>.
"""
versiontools.setuptools_hooks
=============================
Plugins for setuptools that add versintools features.
Setuptools has a framework where external packages, such as versiontools, can
hook into setup.py metadata and commands. We use this feature to intercept
special values of the ``version`` keyword argument to ``setup()``. This
argument handled by the following method:
"""
import sys
from distutils.errors import DistutilsSetupError
from versiontools import Version, _get_exception_message
def version(dist, attr, value):
"""
Handle the ``version`` keyword to setuptools.setup()
.. note::
This function is normally called by setuptools, it is advertised in the
entry points of versiontools as setuptools extension. There is no need
to call in manually.
.. versionadded:: 1.3
"""
# We need to look at dist.metadata.version to actually see the version
# that was passed to setup. Something in between does not seem to like our
# version string and we get 0 here, odd.
if value == 0:
value = dist.metadata.version
if sys.version_info[:1] < (3,):
isstring = lambda string: isinstance(string, basestring)
else:
isstring = lambda string: isinstance(string, str)
if not (isstring(value)
and value.startswith(":versiontools:")):
return
# Peel away the magic tag
value = value[len(":versiontools:"):]
try:
# Lookup the version object
version = Version.from_expression(value)
# Update distribution metadata
dist.metadata.version = str(version)
except ValueError:
message = _get_exception_message(*sys.exc_info())
if message.startswith(": "):
message = message[2:]
raise DistutilsSetupError(message)
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