Synnefo » snf-vncauthproxy

#!python

"""Bootstrap distribute installation

If you want to use setuptools in your package's setup.py, just include this

file in the same directory with it, and add this to the top of your setup.py::

    from distribute_setup import use_setuptools

    use_setuptools()

If you want to require a specific version of setuptools, set a download

mirror, or use an alternate download directory, you can do so by supplying

the appropriate options to ``use_setuptools()``.

This file can also be run as a script to install or upgrade setuptools.

"""

import os

import sys

import time

import fnmatch

import tempfile

import tarfile

from distutils import log

try:

    from site import USER_SITE

except ImportError:

    USER_SITE = None

try:

    import subprocess

    def _python_cmd(*args):

        args = (sys.executable,) + args

        return subprocess.call(args) == 0

except ImportError:

    # will be used for python 2.3

    def _python_cmd(*args):

        args = (sys.executable,) + args

        # quoting arguments if windows

        if sys.platform == 'win32':

            def quote(arg):

                if ' ' in arg:

                    return '"%s"' % arg

                return arg

            args = [quote(arg) for arg in args]

        return os.spawnl(os.P_WAIT, sys.executable, *args) == 0

DEFAULT_VERSION = "0.6.10"

DEFAULT_URL = "http://pypi.python.org/packages/source/d/distribute/"

SETUPTOOLS_FAKED_VERSION = "0.6c11"

SETUPTOOLS_PKG_INFO = """\

Metadata-Version: 1.0

Name: setuptools

Version: %s

Summary: xxxx

Home-page: xxx

Author: xxx

Author-email: xxx

License: xxx

Description: xxx

""" % SETUPTOOLS_FAKED_VERSION

def _install(tarball):

    # extracting the tarball

    tmpdir = tempfile.mkdtemp()

    log.warn('Extracting in %s', tmpdir)

    old_wd = os.getcwd()

    try:

        os.chdir(tmpdir)

        tar = tarfile.open(tarball)

        _extractall(tar)

        tar.close()

        # going in the directory

        subdir = os.path.join(tmpdir, os.listdir(tmpdir)[0])

        os.chdir(subdir)

        log.warn('Now working in %s', subdir)

        # installing

        log.warn('Installing Distribute')

        if not _python_cmd('setup.py', 'install'):

            log.warn('Something went wrong during the installation.')

            log.warn('See the error message above.')

    finally:

        os.chdir(old_wd)

def _build_egg(egg, tarball, to_dir):

    # extracting the tarball

    tmpdir = tempfile.mkdtemp()

    log.warn('Extracting in %s', tmpdir)

    old_wd = os.getcwd()

    try:

        os.chdir(tmpdir)

        tar = tarfile.open(tarball)

        _extractall(tar)

        tar.close()

        # going in the directory

        subdir = os.path.join(tmpdir, os.listdir(tmpdir)[0])

        os.chdir(subdir)

        log.warn('Now working in %s', subdir)

        # building an egg

        log.warn('Building a Distribute egg in %s', to_dir)

        _python_cmd('setup.py', '-q', 'bdist_egg', '--dist-dir', to_dir)

    finally:

        os.chdir(old_wd)

    # returning the result

    log.warn(egg)

    if not os.path.exists(egg):

        raise IOError('Could not build the egg.')

def _do_download(version, download_base, to_dir, download_delay):

    egg = os.path.join(to_dir, 'distribute-%s-py%d.%d.egg'

                       % (version, sys.version_info[0], sys.version_info[1]))

    if not os.path.exists(egg):

        tarball = download_setuptools(version, download_base,

                                      to_dir, download_delay)

        _build_egg(egg, tarball, to_dir)

    sys.path.insert(0, egg)

    import setuptools

    setuptools.bootstrap_install_from = egg

def use_setuptools(version=DEFAULT_VERSION, download_base=DEFAULT_URL,

                   to_dir=os.curdir, download_delay=15, no_fake=True):

    # making sure we use the absolute path

    to_dir = os.path.abspath(to_dir)

    was_imported = 'pkg_resources' in sys.modules or \

        'setuptools' in sys.modules

    try:

        try:

            import pkg_resources

            if not hasattr(pkg_resources, '_distribute'):

                if not no_fake:

                    _fake_setuptools()

                raise ImportError

        except ImportError:

            return _do_download(version, download_base, to_dir, download_delay)

        try:

            pkg_resources.require("distribute>="+version)

            return

        except pkg_resources.VersionConflict:

            e = sys.exc_info()[1]

            if was_imported:

                sys.stderr.write(

                "The required version of distribute (>=%s) is not available,\n"

                "and can't be installed while this script is running. Please\n"

                "install a more recent version first, using\n"

                "'easy_install -U distribute'."

                "\n\n(Currently using %r)\n" % (version, e.args[0]))

                sys.exit(2)

            else:

                del pkg_resources, sys.modules['pkg_resources']    # reload ok

                return _do_download(version, download_base, to_dir,

                                    download_delay)

        except pkg_resources.DistributionNotFound:

            return _do_download(version, download_base, to_dir,

                                download_delay)

    finally:

        if not no_fake:

            _create_fake_setuptools_pkg_info(to_dir)

def download_setuptools(version=DEFAULT_VERSION, download_base=DEFAULT_URL,

                        to_dir=os.curdir, delay=15):

    """Download distribute from a specified location and return its filename

    `version` should be a valid distribute version number that is available

    as an egg for download under the `download_base` URL (which should end

    with a '/'). `to_dir` is the directory where the egg will be downloaded.

    `delay` is the number of seconds to pause before an actual download

    attempt.

    """

    # making sure we use the absolute path

    to_dir = os.path.abspath(to_dir)

    try:

        from urllib.request import urlopen

    except ImportError:

        from urllib2 import urlopen

    tgz_name = "distribute-%s.tar.gz" % version

    url = download_base + tgz_name

    saveto = os.path.join(to_dir, tgz_name)

    src = dst = None

    if not os.path.exists(saveto):  # Avoid repeated downloads

        try:

            log.warn("Downloading %s", url)

            src = urlopen(url)

            # Read/write all in one block, so we don't create a corrupt file

            # if the download is interrupted.

            data = src.read()

            dst = open(saveto, "wb")

            dst.write(data)

        finally:

            if src:

                src.close()

            if dst:

                dst.close()

    return os.path.realpath(saveto)

def _no_sandbox(function):

    def __no_sandbox(*args, **kw):

        try:

            from setuptools.sandbox import DirectorySandbox

            if not hasattr(DirectorySandbox, '_old'):

                def violation(*args):

                    pass

                DirectorySandbox._old = DirectorySandbox._violation

                DirectorySandbox._violation = violation

                patched = True

            else:

                patched = False

        except ImportError:

            patched = False

        try:

            return function(*args, **kw)

        finally:

            if patched:

                DirectorySandbox._violation = DirectorySandbox._old

                del DirectorySandbox._old

    return __no_sandbox

def _patch_file(path, content):

    """Will backup the file then patch it"""

    existing_content = open(path).read()

    if existing_content == content:

        # already patched

        log.warn('Already patched.')

        return False

    log.warn('Patching...')

    _rename_path(path)

    f = open(path, 'w')

    try:

        f.write(content)

    finally:

        f.close()

    return True

_patch_file = _no_sandbox(_patch_file)

def _same_content(path, content):

    return open(path).read() == content

def _rename_path(path):

    new_name = path + '.OLD.%s' % time.time()

    log.warn('Renaming %s into %s', path, new_name)

    os.rename(path, new_name)

    return new_name

def _remove_flat_installation(placeholder):

    if not os.path.isdir(placeholder):

        log.warn('Unkown installation at %s', placeholder)

        return False

    found = False

    for file in os.listdir(placeholder):

        if fnmatch.fnmatch(file, 'setuptools*.egg-info'):

            found = True

            break

    if not found:

        log.warn('Could not locate setuptools*.egg-info')

        return

    log.warn('Removing elements out of the way...')

    pkg_info = os.path.join(placeholder, file)

    if os.path.isdir(pkg_info):

        patched = _patch_egg_dir(pkg_info)

    else:

        patched = _patch_file(pkg_info, SETUPTOOLS_PKG_INFO)

    if not patched:

        log.warn('%s already patched.', pkg_info)

        return False

    # now let's move the files out of the way

    for element in ('setuptools', 'pkg_resources.py', 'site.py'):

        element = os.path.join(placeholder, element)

        if os.path.exists(element):

            _rename_path(element)

        else:

            log.warn('Could not find the %s element of the '

                     'Setuptools distribution', element)

    return True

_remove_flat_installation = _no_sandbox(_remove_flat_installation)

def _after_install(dist):

    log.warn('After install bootstrap.')

    placeholder = dist.get_command_obj('install').install_purelib

    _create_fake_setuptools_pkg_info(placeholder)

def _create_fake_setuptools_pkg_info(placeholder):

    if not placeholder or not os.path.exists(placeholder):

        log.warn('Could not find the install location')

        return

    pyver = '%s.%s' % (sys.version_info[0], sys.version_info[1])

    setuptools_file = 'setuptools-%s-py%s.egg-info' % \

            (SETUPTOOLS_FAKED_VERSION, pyver)

    pkg_info = os.path.join(placeholder, setuptools_file)

    if os.path.exists(pkg_info):

        log.warn('%s already exists', pkg_info)

        return

    log.warn('Creating %s', pkg_info)

    f = open(pkg_info, 'w')

    try:

        f.write(SETUPTOOLS_PKG_INFO)

    finally:

        f.close()

    pth_file = os.path.join(placeholder, 'setuptools.pth')

    log.warn('Creating %s', pth_file)

    f = open(pth_file, 'w')

    try:

        f.write(os.path.join(os.curdir, setuptools_file))

    finally:

        f.close()

_create_fake_setuptools_pkg_info = _no_sandbox(_create_fake_setuptools_pkg_info)

def _patch_egg_dir(path):

    # let's check if it's already patched

    pkg_info = os.path.join(path, 'EGG-INFO', 'PKG-INFO')

    if os.path.exists(pkg_info):

        if _same_content(pkg_info, SETUPTOOLS_PKG_INFO):

            log.warn('%s already patched.', pkg_info)

            return False

    _rename_path(path)

    os.mkdir(path)

    os.mkdir(os.path.join(path, 'EGG-INFO'))

    pkg_info = os.path.join(path, 'EGG-INFO', 'PKG-INFO')

    f = open(pkg_info, 'w')

    try:

        f.write(SETUPTOOLS_PKG_INFO)

    finally:

        f.close()

    return True

_patch_egg_dir = _no_sandbox(_patch_egg_dir)

def _before_install():

    log.warn('Before install bootstrap.')

    _fake_setuptools()

def _under_prefix(location):

    if 'install' not in sys.argv:

        return True

    args = sys.argv[sys.argv.index('install')+1:]

    for index, arg in enumerate(args):

        for option in ('--root', '--prefix'):

            if arg.startswith('%s=' % option):

                top_dir = arg.split('root=')[-1]

                return location.startswith(top_dir)

            elif arg == option:

                if len(args) > index:

                    top_dir = args[index+1]

                    return location.startswith(top_dir)

        if arg == '--user' and USER_SITE is not None:

            return location.startswith(USER_SITE)

    return True

def _fake_setuptools():

    log.warn('Scanning installed packages')

    try:

        import pkg_resources

    except ImportError:

        # we're cool

        log.warn('Setuptools or Distribute does not seem to be installed.')

        return

    ws = pkg_resources.working_set

    try:

        setuptools_dist = ws.find(pkg_resources.Requirement.parse('setuptools',

                                  replacement=False))

    except TypeError:

        # old distribute API

        setuptools_dist = ws.find(pkg_resources.Requirement.parse('setuptools'))

    if setuptools_dist is None:

        log.warn('No setuptools distribution found')

        return

    # detecting if it was already faked

    setuptools_location = setuptools_dist.location

    log.warn('Setuptools installation detected at %s', setuptools_location)

    # if --root or --preix was provided, and if

    # setuptools is not located in them, we don't patch it

    if not _under_prefix(setuptools_location):

        log.warn('Not patching, --root or --prefix is installing Distribute'

                 ' in another location')

        return

    # let's see if its an egg

    if not setuptools_location.endswith('.egg'):

        log.warn('Non-egg installation')

        res = _remove_flat_installation(setuptools_location)

        if not res:

            return

    else:

        log.warn('Egg installation')

        pkg_info = os.path.join(setuptools_location, 'EGG-INFO', 'PKG-INFO')

        if (os.path.exists(pkg_info) and

            _same_content(pkg_info, SETUPTOOLS_PKG_INFO)):

            log.warn('Already patched.')

            return

        log.warn('Patching...')

        # let's create a fake egg replacing setuptools one

        res = _patch_egg_dir(setuptools_location)

        if not res:

            return

    log.warn('Patched done.')

    _relaunch()

def _relaunch():

    log.warn('Relaunching...')

    # we have to relaunch the process

    # pip marker to avoid a relaunch bug

    if sys.argv[:3] == ['-c', 'install', '--single-version-externally-managed']:

        sys.argv[0] = 'setup.py'

    args = [sys.executable] + sys.argv

    sys.exit(subprocess.call(args))

def _extractall(self, path=".", members=None):

    """Extract all members from the archive to the current working

       directory and set owner, modification time and permissions on

       directories afterwards. `path' specifies a different directory

       to extract to. `members' is optional and must be a subset of the

       list returned by getmembers().

    """

    import copy

    import operator

    from tarfile import ExtractError

    directories = []

    if members is None:

        members = self

    for tarinfo in members:

        if tarinfo.isdir():

            # Extract directories with a safe mode.

            directories.append(tarinfo)

            tarinfo = copy.copy(tarinfo)

            tarinfo.mode = 448 # decimal for oct 0700

        self.extract(tarinfo, path)

    # Reverse sort directories.

    if sys.version_info < (2, 4):

        def sorter(dir1, dir2):

            return cmp(dir1.name, dir2.name)

        directories.sort(sorter)

        directories.reverse()

    else:

        directories.sort(key=operator.attrgetter('name'), reverse=True)

    # Set correct owner, mtime and filemode on directories.

    for tarinfo in directories:

        dirpath = os.path.join(path, tarinfo.name)

        try:

            self.chown(tarinfo, dirpath)

            self.utime(tarinfo, dirpath)

            self.chmod(tarinfo, dirpath)

        except ExtractError:

            e = sys.exc_info()[1]

            if self.errorlevel > 1:

                raise

            else:

                self._dbg(1, "tarfile: %s" % e)

def main(argv, version=DEFAULT_VERSION):

    """Install or upgrade setuptools and EasyInstall"""

    tarball = download_setuptools()

    _install(tarball)

if __name__ == '__main__':

    main(sys.argv[1:])