setup.py 22.4 KB
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#!/usr/bin/env python3
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# Copyright 2011-2017 Kwant authors.
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#
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# This file is part of Kwant.  It is subject to the license terms in the file
# LICENSE.rst found in the top-level directory of this distribution and at
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# http://kwant-project.org/license.  A list of Kwant authors can be found in
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# the file AUTHORS.rst at the top-level directory of this distribution and at
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# http://kwant-project.org/authors.

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from __future__ import print_function

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import sys
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import re
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import os
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import glob
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import imp
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import subprocess
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import configparser
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import collections
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from setuptools import setup, find_packages, Extension, Command
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from distutils.errors import DistutilsError, CCompilerError
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from distutils.command.build import build as build_orig
from setuptools.command.sdist import sdist as sdist_orig
from setuptools.command.build_ext import build_ext as build_ext_orig
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from setuptools.command.test import test as test_orig
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STATIC_VERSION_PATH = ('kwant', '_kwant_version.py')
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distr_root = os.path.dirname(os.path.abspath(__file__))


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def configure_extensions(exts, aliases=(), build_summary=None):
    """Modify extension configuration according to the configuration file

    `exts` must be a dict of (name, kwargs) tuples that can be used like this:
    `Extension(name, **kwargs).  This function modifies the kwargs according to
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    the configuration file.

    This function modifies `sys.argv`.
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    """
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    global config_file, config_file_present

    #### Determine the name of the configuration file.
    config_file_option = '--configfile'
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    config_file_option_present = False
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    # Handle command line option
    for i, opt in enumerate(sys.argv):
        if not opt.startswith(config_file_option):
            continue
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        config_file_option_present = True
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        l, _, config_file = opt.partition('=')
        if l != config_file_option or not config_file:
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            print('Error: Expecting {}=PATH'.format(config_file_option),
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                  file=sys.stderr)
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            sys.exit(1)
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        sys.argv.pop(i)
        break
    else:
        config_file = 'build.conf'
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    #### Read build configuration file.
    configs = configparser.ConfigParser()
    try:
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        with open(config_file) as f:
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            configs.read_file(f)
    except IOError:
        config_file_present = False
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        if config_file_option_present:
            print("Error: '{}' option was provided, but '{}' does not exist"
                  .format(config_file_option, config_file))
            sys.exit(1)
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    else:
        config_file_present = True

    #### Handle section aliases.
    for short, long in aliases:
        if short in configs:
            if long in configs:
                print('Error: both {} and {} sections present in {}.'.format(
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                    short, long, config_file))
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                sys.exit(1)
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            configs[long] = configs[short]
            del configs[short]

    #### Apply config from file.  Use [DEFAULT] section for missing sections.
    defaultconfig = configs.defaults()
    for name, kwargs in exts.items():
        config = configs[name] if name in configs else defaultconfig
        for key, value in config.items():

            # Most, but not all, keys are lists of strings
            if key == 'language':
                pass
            elif key == 'optional':
                value = bool(int(value))
            else:
                value = value.split()

            if key == 'define_macros':
                value = [tuple(entry.split('=', maxsplit=1))
                         for entry in value]
                value = [(entry[0], None) if len(entry) == 1 else entry
                         for entry in value]

            if key in kwargs:
                msg = 'Caution: user config in file {} shadows {}.{}.'
                if build_summary is not None:
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                    build_summary.append(msg.format(config_file, name, key))
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            kwargs[key] = value

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        kwargs.setdefault('depends', []).append(config_file)
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        if config is not defaultconfig:
            del configs[name]

    unknown_sections = configs.sections()
    if unknown_sections:
        print('Error: Unknown sections in file {}: {}'.format(
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            config_file, ', '.join(unknown_sections)))
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        sys.exit(1)
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    return exts


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def check_versions():
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    global version, version_is_from_git

    # Let Kwant itself determine its own version.  We cannot simply import
    # kwant, as it is not built yet.
    _dont_write_bytecode_saved = sys.dont_write_bytecode
    sys.dont_write_bytecode = True
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    version_module = imp.load_source('version', 'kwant/version.py')
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    sys.dont_write_bytecode = _dont_write_bytecode_saved

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    version_module.ensure_python()
    version = version_module.version
    version_is_from_git = version_module.version_is_from_git
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def init_cython():
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    """Set the global variable `cythonize` (and other related globals).

    The variable `cythonize` can be in three states:

    * If Cython should be run and is ready, it contains the `cythonize()`
      function.

    * If Cython is not to be run, it contains `False`.

    * If Cython should, but cannot be run it contains `None`.  A help message
      on how to solve the problem is stored in `cython_help`.

    This function modifies `sys.argv`.
    """
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    global cythonize, cython_help
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    cython_option = '--cython'
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    required_cython_version = (0, 22)
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    try:
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        sys.argv.remove(cython_option)
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        cythonize = True
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    except ValueError:
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        cythonize = version_is_from_git
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    if cythonize:
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        try:
            import Cython
            from Cython.Build import cythonize
        except ImportError:
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            cythonize = None
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        else:
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            #### Get Cython version.
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            match = re.match('([0-9.]*)(.*)', Cython.__version__)
            cython_version = [int(n) for n in match.group(1).split('.')]
            # Decrease version if the version string contains a suffix.
            if match.group(2):
                while cython_version[-1] == 0:
                    cython_version.pop()
                cython_version[-1] -= 1
            cython_version = tuple(cython_version)
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            if cython_version < required_cython_version:
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                cythonize = None

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        if cythonize is None:
            msg = ("Install Cython >= {0} or use"
                    " a source distribution (tarball) of Kwant.")
            ver = '.'.join(str(e) for e in required_cython_version)
            cython_help = msg.format(ver)
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    else:
        msg = "Run setup.py with the {} option to enable Cython."
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        cython_help = msg.format(cython_option)
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def banner(title=''):
    starred = title.center(79, '*')
    return '\n' + starred if title else starred
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class build_ext(build_ext_orig):
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    def run(self):
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        if not config_file_present:
            # Create an empty config file if none is present so that the
            # extensions will not be rebuilt each time.  Only depending on the
            # config file if it is present would make it impossible to detect a
            # necessary rebuild due to a deleted config file.
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            with open(config_file, 'w') as f:
                f.write('# Build configuration created by setup.py '
                        '- feel free to modify.\n')
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        try:
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            super().run()
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        except (DistutilsError, CCompilerError):
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            error_msg = self.__error_msg.format(
                header=banner(' Error '), sep=banner())
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            print(error_msg.format(file=config_file, summary=build_summary),
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                  file=sys.stderr)
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            raise
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        print(banner(' Build summary '), *build_summary, sep='\n')
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        print(banner())
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    __error_msg = """{header}
The compilation of Kwant has failed.  Please examine the error message
above and consult the installation instructions in README.rst.
You might have to customize {{file}}.

Build configuration was:

{{summary}}
{sep}
"""

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class build_tut(Command):
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    description = "build the tutorial scripts"
    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def run(self):
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        tut_dir = 'tutorial'
        if not os.path.exists(tut_dir):
            os.mkdir(tut_dir)
        for in_fname in glob.glob('doc/source/tutorial/*.py'):
            out_fname = os.path.join(tut_dir, os.path.basename(in_fname))
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            with open(in_fname, 'rb') as in_file:
                with open(out_fname, 'wb') as out_file:
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                    for line in in_file:
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                        if not line.startswith(b'#HIDDEN'):
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                            out_file.write(line)
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# Our version of the "build" command also makes sure the tutorial is made.
# Even though the tutorial is not necessary for installation, and "build" is
# supposed to make everything needed to install, this is a robust way to ensure
# that the tutorial is present.
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class build(build_orig):
    sub_commands = [('build_tut', None)] + build_orig.sub_commands
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    def run(self):
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        super().run()
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        write_version(os.path.join(self.build_lib, *STATIC_VERSION_PATH))

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def git_lsfiles():
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    if not version_is_from_git:
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        return

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    try:
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        p = subprocess.Popen(['git', 'ls-files'], cwd=distr_root,
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                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    except OSError:
        return

    if p.wait() != 0:
        return
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    return p.communicate()[0].decode().split('\n')[:-1]
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# Make the command "sdist" depend on "build".  This verifies that the
# distribution in the current state actually builds.  It also makes sure that
# the Cython-made C files and the tutorial will be included in the source
# distribution and that they will be up-to-date.
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class sdist(sdist_orig):
    sub_commands = [('build', None)] + sdist_orig.sub_commands
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    def run(self):
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        """
        Create MANIFEST.in from git if possible, otherwise check that MANIFEST.in
        is present.

        Right now (2015) generating MANIFEST.in seems to be the only way to
        include files in the source distribution that setuptools does not think
        should be there.  Setting include_package_data to True makes setuptools
        include *.pyx and other source files in the binary distribution.
        """
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        manifest_in_file = 'MANIFEST.in'
        manifest = os.path.join(distr_root, manifest_in_file)
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        names = git_lsfiles()
        if names is None:
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            if not (os.path.isfile(manifest) and os.access(manifest, os.R_OK)):
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                print("Error:", manifest_in_file,
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                      "file is missing and Git is not available"
                      " to regenerate it.", file=sys.stderr)
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                sys.exit(1)
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        else:
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            with open(manifest, 'w') as f:
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                for name in names:
                    a, sep, b = name.rpartition('/')
                    if b == '.gitignore':
                        continue
                    stem, dot, extension = b.rpartition('.')
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                    f.write('include {}'.format(name))
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                    if extension == 'pyx':
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                        f.write(''.join([' ', a, sep, stem, dot, 'c']))
                    f.write('\n')
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        super().run()
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        if names is None:
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            msg = ("Git was not available to generate the list of files to be "
                   "included in the\nsource distribution. The old {} was used.")
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            msg = msg.format(manifest_in_file)
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            print(banner(' Caution '), msg, banner(), sep='\n', file=sys.stderr)
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    def make_release_tree(self, base_dir, files):
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        super().make_release_tree(base_dir, files)
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        write_version(os.path.join(base_dir, *STATIC_VERSION_PATH))
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# The following class is based on a recipe in
# http://doc.pytest.org/en/latest/goodpractices.html#manual-integration.
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class test(test_orig):
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    user_options = [('pytest-args=', 'a', "Arguments to pass to pytest")]

    def initialize_options(self):
        super().initialize_options()
        self.pytest_args = ''

    def run_tests(self):
        import shlex
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        try:
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            import pytest
        except:
            print('The Python package "pytest" is required to run tests.',
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                  file=sys.stderr)
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            sys.exit(1)
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        errno = pytest.main(shlex.split(self.pytest_args))
        sys.exit(errno)
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def write_version(fname):
    # This could be a hard link, so try to delete it first.  Is there any way
    # to do this atomically together with opening?
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    try:
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        os.remove(fname)
    except OSError:
        pass
    with open(fname, 'w') as f:
        f.write("# This file has been created by setup.py.\n")
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        f.write("version = '{}'\n".format(version))
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def long_description():
    text = []
    try:
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        with open('README.rst', encoding='utf8') as f:
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            for line in f:
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                if line.startswith('See also in this directory:'):
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                    break
                text.append(line.rstrip())
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            while text[-1] == "":
                text.pop()
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    except:
        return ''
    return '\n'.join(text)


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def search_libs(libs):
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    cmd = ['gcc']
    cmd.extend(['-l' + lib for lib in libs])
    cmd.extend(['-o/dev/null', '-xc', '-'])
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    try:
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        p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stderr=subprocess.PIPE)
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    except OSError:
        pass
    else:
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        p.communicate(input=b'int main() {}\n')
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        if p.wait() == 0:
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            return libs


def search_mumps():
    """Return the configuration for MUMPS if it is available in a known way.

    This is known to work with the MUMPS provided by the Debian package
    libmumps-scotch-dev and the MUMPS binaries in the conda-forge channel."""
    lib_sets = [
        # Debian
        ['zmumps_scotch', 'mumps_common_scotch', 'mpiseq_scotch'],
        # Conda (via conda-forge).
        # TODO: remove dependency libs (scotch, metis...) when conda-forge
        # packaged mumps/scotch are built as properly linked shared libs
        ['zmumps', 'mumps_common', 'metis', 'esmumps', 'scotch',
         'scotcherr', 'mpiseq'],
    ]
    common_libs = ['pord', 'gfortran']

    for libs in lib_sets:
        found_libs = search_libs(libs + common_libs)
        if found_libs:
            return found_libs
    return []


def search_lapack():
    """Return the BLAS variant that is installed."""
    lib_sets = [
        # Debian
        ['blas', 'lapack'],
        # Conda (via conda-forge). Openblas contains lapack symbols
        ['openblas', 'gfortran'],
    ]

    for libs in lib_sets:
        found_libs = search_libs(libs)
        if found_libs:
            return found_libs
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    print('Error: BLAS/LAPACK are required but were not found.',
          file=sys.stderr)
    sys.exit(1)
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def configure_special_extensions(exts, build_summary):
    #### Special config for LAPACK.
    lapack = exts['kwant.linalg.lapack']
    if 'libraries' in lapack:
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        build_summary.append('User-configured LAPACK and BLAS')
    else:
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        lapack['libraries'] = search_lapack()
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        build_summary.append('Default LAPACK and BLAS')
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    #### Special config for MUMPS.
    mumps = exts['kwant.linalg._mumps']
    if 'libraries' in mumps:
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        build_summary.append('User-configured MUMPS')
    else:
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        mumps_libs = search_mumps()
        if mumps_libs:
            mumps['libraries'] = mumps_libs
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            build_summary.append('Auto-configured MUMPS')
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        else:
            mumps = None
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            del exts['kwant.linalg._mumps']
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            build_summary.append('No MUMPS support')
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    if mumps:
        # Copy config from LAPACK.
        for key, value in lapack.items():
            if key not in ['sources', 'depends']:
                mumps.setdefault(key, []).extend(value)
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    return exts
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def maybe_cythonize(exts):
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    """Prepare a list of `Extension` instances, ready for `setup()`.
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    The argument `exts` must be a mapping of names to kwargs to be passed
    on to `Extension`.
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    If Cython is to be run, create the extensions and calls `cythonize()` on
    them.  If Cython is not to be run, replace .pyx file with .c or .cpp,
    check timestamps, and create the extensions.
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    """
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    if cythonize:
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        return cythonize([Extension(name, **kwargs)
                          for name, kwargs in exts.items()],
                         language_level=3,
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                         compiler_directives={'linetrace': True})
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    # Cython is not going to be run: replace pyx extension by that of
    # the shipped translated file.

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    result = []
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    problematic_files = []
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    for name, kwargs in exts.items():
        language = kwargs.get('language')
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        if language is None:
            ext = '.c'
        elif language == 'c':
            ext = '.c'
        elif language == 'c++':
            ext = '.cpp'
        else:
            print('Unknown language: {}'.format(language), file=sys.stderr)
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            sys.exit(1)
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        pyx_files = []
        cythonized_files = []
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        sources = []
        for f in kwargs['sources']:
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            if f.endswith('.pyx'):
                pyx_files.append(f)
                f = f.rstrip('.pyx') + ext
                cythonized_files.append(f)
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            sources.append(f)
        kwargs['sources'] = sources
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        # Complain if cythonized files are older than Cython source files.
        try:
            cythonized_oldest = min(os.stat(f).st_mtime
                                    for f in cythonized_files)
        except OSError:
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            msg = "Cython-generated file {} is missing."
            print(banner(" Error "), msg.format(f), "",
                  cython_help, banner(), sep="\n", file=sys.stderr)
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            sys.exit(1)
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        for f in pyx_files + kwargs.get('depends', []):
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            if f == config_file:
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                # The config file is only a dependency for the compilation
                # of the cythonized file, not for the cythonization.
                continue
            if os.stat(f).st_mtime > cythonized_oldest:
                problematic_files.append(f)
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        result.append(Extension(name, **kwargs))
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    if problematic_files:
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        msg = ("Some Cython source files are newer than files that have "
               "been derived from them:\n{}")
        msg = msg.format(", ".join(problematic_files))

        # Cython should be run but won't.  Signal an error if this is because
        # Cython *cannot* be run, warn otherwise.
        error = cythonize is None
        if cythonize is False:
            dontworry = ('(Do not worry about this if you are building Kwant '
                         'from unmodified sources,\n'
                         'e.g. with "pip install".)\n\n')
            msg = dontworry + msg

        print(banner(" Error " if error else " Caution "), msg, "",
              cython_help, banner(), sep="\n", file=sys.stderr)
        if error:
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            sys.exit(1)
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    return result

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def main():
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    check_versions()

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    exts = collections.OrderedDict([
        ('kwant._system',
         dict(sources=['kwant/_system.pyx'],
              include_dirs=['kwant/graph'])),
        ('kwant.operator',
         dict(sources=['kwant/operator.pyx'],
              include_dirs=['kwant/graph'])),
        ('kwant.graph.core',
         dict(sources=['kwant/graph/core.pyx'],
              depends=['kwant/graph/core.pxd', 'kwant/graph/defs.h',
                       'kwant/graph/defs.pxd'])),
        ('kwant.graph.utils',
         dict(sources=['kwant/graph/utils.pyx'],
              depends=['kwant/graph/defs.h', 'kwant/graph/defs.pxd',
                       'kwant/graph/core.pxd'])),
        ('kwant.graph.slicer',
         dict(sources=['kwant/graph/slicer.pyx',
                       'kwant/graph/c_slicer/partitioner.cc',
                       'kwant/graph/c_slicer/slicer.cc'],
              depends=['kwant/graph/defs.h', 'kwant/graph/defs.pxd',
                       'kwant/graph/core.pxd', 'kwant/graph/c_slicer.pxd',
                       'kwant/graph/c_slicer/bucket_list.h',
                       'kwant/graph/c_slicer/graphwrap.h',
                       'kwant/graph/c_slicer/partitioner.h',
                       'kwant/graph/c_slicer/slicer.h'])),
        ('kwant.linalg.lapack',
         dict(sources=['kwant/linalg/lapack.pyx'],
              depends=['kwant/linalg/f_lapack.pxd'])),
        ('kwant.linalg._mumps',
         dict(sources=['kwant/linalg/_mumps.pyx'],
              depends=['kwant/linalg/cmumps.pxd']))])

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    # Add NumPy header path to include_dirs of all the extensions.
    try:
        import numpy
    except ImportError:
        print(banner(' Caution '), 'NumPy header directory cannot be determined'
              ' ("import numpy" failed).', banner(), sep='\n', file=sys.stderr)
    else:
        numpy_include = numpy.get_include()
        for ext in exts.values():
            ext.setdefault('include_dirs', []).append(numpy_include)

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    aliases = [('lapack', 'kwant.linalg.lapack'),
               ('mumps', 'kwant.linalg._mumps')]
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    init_cython()

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    global build_summary
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    build_summary = []
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    exts = configure_extensions(exts, aliases, build_summary)
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    exts = configure_special_extensions(exts, build_summary)
    exts = maybe_cythonize(exts)

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    classifiers = """\
        Development Status :: 5 - Production/Stable
        Intended Audience :: Science/Research
        Intended Audience :: Developers
        Programming Language :: Python :: 3 :: Only
        Topic :: Software Development
        Topic :: Scientific/Engineering
        Operating System :: POSIX
        Operating System :: Unix
        Operating System :: MacOS :: MacOS X
        Operating System :: Microsoft :: Windows"""

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    setup(name='kwant',
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          version=version,
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          author='C. W. Groth (CEA), M. Wimmer, '
                 'A. R. Akhmerov, X. Waintal (CEA), and others',
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          author_email='authors@kwant-project.org',
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          description=("Package for numerical quantum transport calculations "
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                       "(Python 3 version)"),
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          long_description=long_description(),
          platforms=["Unix", "Linux", "Mac OS-X", "Windows"],
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          url="http://kwant-project.org/",
          license="BSD",
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          packages=find_packages('.'),
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          cmdclass={'build': build,
                    'sdist': sdist,
                    'build_ext': build_ext,
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                    'build_tut': build_tut,
                    'test': test},
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          ext_modules=exts,
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          install_requires=['numpy >= 1.11.0', 'scipy >= 0.17.0',
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                            'tinyarray >= 1.2'],
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          extras_require={
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              # The oldest versions between: Debian stable, Ubuntu LTS
              'plotting': 'matplotlib >= 1.5.1',
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              'continuum': 'sympy >= 0.7.6',
          },
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          classifiers=[c.strip() for c in classifiers.split('\n')])
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if __name__ == '__main__':
    main()