#!/usr/bin/env python
# pylint: disable=W0142,W0403,W0404,W0613,W0622,W0622,W0704,R0904,C0103,E0611
#
# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
"""Generic Setup script, takes package info from __pkginfo__.py file
"""

import os
import sys
import shutil
from os.path import isdir, exists, join, walk

try:
    if os.environ.get('NO_SETUPTOOLS'):
        raise ImportError() # do as there is no setuptools
    from setuptools import setup
    from setuptools.command import install_lib
    USE_SETUPTOOLS = True
except ImportError:
    from distutils.core import setup
    from distutils.command import install_lib
    USE_SETUPTOOLS = False
from distutils.command import install_data

# import required features
from __pkginfo__ import modname, version, license, description, web, \
     author, author_email

long_description = file('README').read()

# import optional features
import __pkginfo__
if USE_SETUPTOOLS:
    requires = {}
    for entry in ("__depends__",): # "__recommends__"):
        requires.update(getattr(__pkginfo__, entry, {}))
    install_requires = [("%s %s" % (d, v and v or "")).strip()
                       for d, v in requires.iteritems()]
else:
    install_requires = []

distname = getattr(__pkginfo__, 'distname', modname)
scripts = getattr(__pkginfo__, 'scripts', ())
include_dirs = getattr(__pkginfo__, 'include_dirs', ())
data_files = getattr(__pkginfo__, 'data_files', None)
subpackage_of = getattr(__pkginfo__, 'subpackage_of', None)
ext_modules = getattr(__pkginfo__, 'ext_modules', None)
package_data = getattr(__pkginfo__, 'package_data', {})

BASE_BLACKLIST = ('CVS', 'dist', 'build', '__buildlog')
IGNORED_EXTENSIONS = ('.pyc', '.pyo', '.elc')


def ensure_scripts(linux_scripts):
    """
    Creates the proper script names required for each platform
    (taken from 4Suite)
    """
    from distutils import util
    if util.get_platform()[:3] == 'win':
        scripts_ = [script + '.bat' for script in linux_scripts]
    else:
        scripts_ = linux_scripts
    return scripts_


def get_packages(directory, prefix):
    """return a list of subpackages for the given directory
    """
    result = []
    for package in os.listdir(directory):
        absfile = join(directory, package)
        if isdir(absfile):
            if exists(join(absfile, '__init__.py')) or \
                   package in ('test', 'tests'):
                if prefix:
                    result.append('%s.%s' % (prefix, package))
                else:
                    result.append(package)
                result += get_packages(absfile, result[-1])
    return result

def export(from_dir, to_dir,
           blacklist=BASE_BLACKLIST,
           ignore_ext=IGNORED_EXTENSIONS,
           verbose=True):
    """make a mirror of from_dir in to_dir, omitting directories and files
    listed in the black list
    """
    def make_mirror(arg, directory, fnames):
        """walk handler"""
        for norecurs in blacklist:
            try:
                fnames.remove(norecurs)
            except ValueError:
                pass
        for filename in fnames:
            # don't include binary files
            if filename[-4:] in ignore_ext:
                continue
            if filename[-1] == '~':
                continue
            src = '%s/%s' % (directory, filename)
            dest = to_dir + src[len(from_dir):]
            if verbose:
               sys.stderr.write('%s -> %s\n' % (src, dest))
            if os.path.isdir(src):
                if not exists(dest):
                    os.mkdir(dest)
            else:
                if exists(dest):
                    os.remove(dest)
                shutil.copy2(src, dest)
    try:
        os.mkdir(to_dir)
    except OSError as ex:
        # file exists ?
        import errno
        if ex.errno != errno.EEXIST:
            raise
    walk(from_dir, make_mirror, None)


EMPTY_FILE = '"""generated file, don\'t modify or your data will be lost"""\n'

class MyInstallLib(install_lib.install_lib):
    """extend install_lib command to handle  package __init__.py and
    include_dirs variable if necessary
    """
    def run(self):
        """overridden from install_lib class"""
        install_lib.install_lib.run(self)
        # create Products.__init__.py if needed
        if subpackage_of:
            product_init = join(self.install_dir, subpackage_of, '__init__.py')
            if not exists(product_init):
                self.announce('creating %s' % product_init)
                stream = open(product_init, 'w')
                stream.write(EMPTY_FILE)
                stream.close()
        # manually install included directories if any
        if include_dirs:
            if subpackage_of:
                base = join(subpackage_of, modname)
            else:
                base = modname
            for directory in include_dirs:
                dest = join(self.install_dir, base, directory)
                export(directory, dest, verbose=False)

# write required share/cubicweb/cubes/__init__.py
class MyInstallData(install_data.install_data):
    """A class That manages data files installation"""
    def run(self):
        """overridden from install_data class"""
        install_data.install_data.run(self)
        path = join(self.install_dir, 'share', 'cubicweb', 'cubes', '__init__.py')
        ini = open(path, 'w')
        ini.write('# Cubicweb cubes directory\n')
        ini.close()

# re-enable copying data files in sys.prefix
if USE_SETUPTOOLS:
    # overwrite MyInstallData to use sys.prefix instead of the egg directory
    MyInstallMoreData = MyInstallData
    class MyInstallData(MyInstallMoreData): # pylint: disable=E0102
        """A class that manages data files installation"""
        def run(self):
            _old_install_dir = self.install_dir
            if self.install_dir.endswith('egg'):
                self.install_dir = sys.prefix
            MyInstallMoreData.run(self)
            self.install_dir = _old_install_dir
    try:
        import setuptools.command.easy_install # only if easy_install available
        # monkey patch: Crack SandboxViolation verification
        from setuptools.sandbox import DirectorySandbox as DS
        old_ok = DS._ok
        def _ok(self, path):
            """Return True if ``path`` can be written during installation."""
            out = old_ok(self, path) # here for side effect from setuptools
            realpath = os.path.normcase(os.path.realpath(path))
            allowed_path = os.path.normcase(sys.prefix)
            if realpath.startswith(allowed_path):
                out = True
            return out
        DS._ok = _ok
    except ImportError:
        pass

def install(**kwargs):
    """setup entry point"""
    if USE_SETUPTOOLS:
        if '--force-manifest' in sys.argv:
            sys.argv.remove('--force-manifest')
    # install-layout option was introduced in 2.5.3-1~exp1
    elif sys.version_info < (2, 5, 4) and '--install-layout=deb' in sys.argv:
        sys.argv.remove('--install-layout=deb')
    if subpackage_of:
        package = subpackage_of + '.' + modname
        kwargs['package_dir'] = {package : '.'}
        packages = [package] + get_packages(os.getcwd(), package)
        if USE_SETUPTOOLS:
            kwargs['namespace_packages'] = [subpackage_of]
    else:
        kwargs['package_dir'] = {modname : '.'}
        packages = [modname] + get_packages(os.getcwd(), modname)
    if USE_SETUPTOOLS:
        kwargs['install_requires'] = install_requires
        kwargs['zip_safe'] = False
    kwargs['packages'] = packages
    kwargs['package_data'] = package_data
    return setup(name=distname, version=version, license=license, url=web,
                 description=description, long_description=long_description,
                 author=author, author_email=author_email,
                 scripts=ensure_scripts(scripts), data_files=data_files,
                 ext_modules=ext_modules,
                 cmdclass={'install_lib': MyInstallLib,
                           'install_data': MyInstallData},
                 **kwargs
                 )

if __name__ == '__main__' :
    install()