upstream/mercurial-mirror Files · contrib/python-zstandard/setup.py

bundle2: extract logic for seeking bundle2 part into own class...

bundle2: extract logic for seeking bundle2 part into own class Currently, unbundlepart classes support bi-directional seeking. Most consumers of unbundlepart only ever seek forward - typically as part of moving to the end of the bundle part so they can move on to the next one. But regardless of the actual usage of the part, instances maintain an index mapping offsets within the underlying raw payload to offsets within the decoded payload. Maintaining the mapping of offset data can be expensive in terms of memory use. Furthermore, many bundle2 consumers don't have access to an underlying seekable stream. This includes all compressed bundles. So maintaining offset data when the underlying stream can't be seeked anyway is wasteful. And since many bundle2 streams can't be seeked, it seems like a bad idea to expose a seek API in bundle2 parts by default. If you provide them, people will attempt to use them. Seekable bundle2 parts should be the exception, not the rule. This commit starts the process dividing unbundlepart into 2 classes: a base class that supports linear, one-time reads and a child class that supports bi-directional seeking. In this first commit, we split various methods and attributes out into a new "seekableunbundlepart" class. Previous instantiators of "unbundlepart" now instantiate "seekableunbundlepart." This preserves backwards compatibility. The coupling between the classes is still tight: "unbundlepart" cannot be used on its own. This will be addressed in subsequent commits. Differential Revision: https://phab.mercurial-scm.org/D1386

Gregory Szorc - - Load All Authors

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      #!/usr/bin/env python

      # Copyright (c) 2016-present, Gregory Szorc

      # All rights reserved.

      #

      # This software may be modified and distributed under the terms

      # of the BSD license. See the LICENSE file for details.

      import sys

      from setuptools import setup

      try:

          import cffi

      except ImportError:

          cffi = None

      import setup_zstd

      SUPPORT_LEGACY = False

      if "--legacy" in sys.argv:

          SUPPORT_LEGACY = True

          sys.argv.remove("--legacy")

      # Code for obtaining the Extension instance is in its own module to

      # facilitate reuse in other projects.

      extensions = [setup_zstd.get_c_extension(SUPPORT_LEGACY, 'zstd')]

      install_requires = []

      if cffi:

          import make_cffi

          extensions.append(make_cffi.ffi.distutils_extension())

          # Need change in 1.8 for ffi.from_buffer() behavior.

          install_requires.append('cffi>=1.8')

      version = None

      with open('c-ext/python-zstandard.h', 'r') as fh:

          for line in fh:

              if not line.startswith('#define PYTHON_ZSTANDARD_VERSION'):

                  continue

              version = line.split()[2][1:-1]

              break

      if not version:

          raise Exception('could not resolve package version; '

                          'this should never happen')

      setup(

          name='zstandard',

          version=version,

          description='Zstandard bindings for Python',

          long_description=open('README.rst', 'r').read(),

          url='https://github.com/indygreg/python-zstandard',

          author='Gregory Szorc',

          author_email='gregory.szorc@gmail.com',

          license='BSD',

          classifiers=[

              'Development Status :: 4 - Beta',

              'Intended Audience :: Developers',

              'License :: OSI Approved :: BSD License',

              'Programming Language :: C',

              'Programming Language :: Python :: 2.6',

              'Programming Language :: Python :: 2.7',

              'Programming Language :: Python :: 3.3',

              'Programming Language :: Python :: 3.4',

              'Programming Language :: Python :: 3.5',

              'Programming Language :: Python :: 3.6',

          ],

          keywords='zstandard zstd compression',

          ext_modules=extensions,

          test_suite='tests',

          install_requires=install_requires,

      )

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				#!/usr/bin/env python
				# Copyright (c) 2016-present, Gregory Szorc
				# All rights reserved.
				#
				# This software may be modified and distributed under the terms
				# of the BSD license. See the LICENSE file for details.

				import sys
				from setuptools import setup

				try:
				import cffi
				except ImportError:
				cffi = None

				import setup_zstd

				SUPPORT_LEGACY = False

				if "--legacy" in sys.argv:
				SUPPORT_LEGACY = True
				sys.argv.remove("--legacy")

				# Code for obtaining the Extension instance is in its own module to
				# facilitate reuse in other projects.
				extensions = [setup_zstd.get_c_extension(SUPPORT_LEGACY, 'zstd')]

				install_requires = []

				if cffi:
				import make_cffi
				extensions.append(make_cffi.ffi.distutils_extension())

				# Need change in 1.8 for ffi.from_buffer() behavior.
				install_requires.append('cffi>=1.8')

				version = None

				with open('c-ext/python-zstandard.h', 'r') as fh:
				for line in fh:
				if not line.startswith('#define PYTHON_ZSTANDARD_VERSION'):
				continue

				version = line.split()[2][1:-1]
				break

				if not version:
				raise Exception('could not resolve package version; '
				'this should never happen')

				setup(
				name='zstandard',
				version=version,
				description='Zstandard bindings for Python',
				long_description=open('README.rst', 'r').read(),
				url='https://github.com/indygreg/python-zstandard',
				author='Gregory Szorc',
				author_email='gregory.szorc@gmail.com',
				license='BSD',
				classifiers=[
				'Development Status :: 4 - Beta',
				'Intended Audience :: Developers',
				'License :: OSI Approved :: BSD License',
				'Programming Language :: C',
				'Programming Language :: Python :: 2.6',
				'Programming Language :: Python :: 2.7',
				'Programming Language :: Python :: 3.3',
				'Programming Language :: Python :: 3.4',
				'Programming Language :: Python :: 3.5',
				'Programming Language :: Python :: 3.6',
				],
				keywords='zstandard zstd compression',
				ext_modules=extensions,
				test_suite='tests',
				install_requires=install_requires,
				)