--- /dev/null
+#!/usr/bin/env python
+
+"""
+Setuptools bootstrapping installer.
+
+Maintained at https://github.com/pypa/setuptools/tree/bootstrap.
+
+Run this script to install or upgrade setuptools.
+"""
+
+import os
+import shutil
+import sys
+import tempfile
+import zipfile
+import optparse
+import subprocess
+import platform
+import textwrap
+import contextlib
+import json
+import codecs
+
+from distutils import log
+
+try:
+ from urllib.request import urlopen
+ from urllib.parse import urljoin
+except ImportError:
+ from urllib2 import urlopen
+ from urlparse import urljoin
+
+try:
+ from site import USER_SITE
+except ImportError:
+ USER_SITE = None
+
+LATEST = object()
+DEFAULT_VERSION = LATEST
+DEFAULT_URL = "https://pypi.io/packages/source/s/setuptools/"
+DEFAULT_SAVE_DIR = os.curdir
+
+
+def _python_cmd(*args):
+ """
+ Execute a command.
+
+ Return True if the command succeeded.
+ """
+ args = (sys.executable,) + args
+ return subprocess.call(args) == 0
+
+
+def _install(archive_filename, install_args=()):
+ """Install Setuptools."""
+ with archive_context(archive_filename):
+ # installing
+ log.warn('Installing Setuptools')
+ if not _python_cmd('setup.py', 'install', *install_args):
+ log.warn('Something went wrong during the installation.')
+ log.warn('See the error message above.')
+ # exitcode will be 2
+ return 2
+
+
+def _build_egg(egg, archive_filename, to_dir):
+ """Build Setuptools egg."""
+ with archive_context(archive_filename):
+ # building an egg
+ log.warn('Building a Setuptools egg in %s', to_dir)
+ _python_cmd('setup.py', '-q', 'bdist_egg', '--dist-dir', to_dir)
+ # returning the result
+ log.warn(egg)
+ if not os.path.exists(egg):
+ raise IOError('Could not build the egg.')
+
+
+class ContextualZipFile(zipfile.ZipFile):
+
+ """Supplement ZipFile class to support context manager for Python 2.6."""
+
+ def __enter__(self):
+ return self
+
+ def __exit__(self, type, value, traceback):
+ self.close()
+
+ def __new__(cls, *args, **kwargs):
+ """Construct a ZipFile or ContextualZipFile as appropriate."""
+ if hasattr(zipfile.ZipFile, '__exit__'):
+ return zipfile.ZipFile(*args, **kwargs)
+ return super(ContextualZipFile, cls).__new__(cls)
+
+
+@contextlib.contextmanager
+def archive_context(filename):
+ """
+ Unzip filename to a temporary directory, set to the cwd.
+
+ The unzipped target is cleaned up after.
+ """
+ tmpdir = tempfile.mkdtemp()
+ log.warn('Extracting in %s', tmpdir)
+ old_wd = os.getcwd()
+ try:
+ os.chdir(tmpdir)
+ with ContextualZipFile(filename) as archive:
+ archive.extractall()
+
+ # going in the directory
+ subdir = os.path.join(tmpdir, os.listdir(tmpdir)[0])
+ os.chdir(subdir)
+ log.warn('Now working in %s', subdir)
+ yield
+
+ finally:
+ os.chdir(old_wd)
+ shutil.rmtree(tmpdir)
+
+
+def _do_download(version, download_base, to_dir, download_delay):
+ """Download Setuptools."""
+ py_desig = 'py{sys.version_info[0]}.{sys.version_info[1]}'.format(sys=sys)
+ tp = 'setuptools-{version}-{py_desig}.egg'
+ egg = os.path.join(to_dir, tp.format(**locals()))
+ if not os.path.exists(egg):
+ archive = download_setuptools(version, download_base,
+ to_dir, download_delay)
+ _build_egg(egg, archive, to_dir)
+ sys.path.insert(0, egg)
+
+ # Remove previously-imported pkg_resources if present (see
+ # https://bitbucket.org/pypa/setuptools/pull-request/7/ for details).
+ if 'pkg_resources' in sys.modules:
+ _unload_pkg_resources()
+
+ import setuptools
+ setuptools.bootstrap_install_from = egg
+
+
+def use_setuptools(
+ version=DEFAULT_VERSION, download_base=DEFAULT_URL,
+ to_dir=DEFAULT_SAVE_DIR, download_delay=15):
+ """
+ Ensure that a setuptools version is installed.
+
+ Return None. Raise SystemExit if the requested version
+ or later cannot be installed.
+ """
+ version = _resolve_version(version)
+ to_dir = os.path.abspath(to_dir)
+
+ # prior to importing, capture the module state for
+ # representative modules.
+ rep_modules = 'pkg_resources', 'setuptools'
+ imported = set(sys.modules).intersection(rep_modules)
+
+ try:
+ import pkg_resources
+ pkg_resources.require("setuptools>=" + version)
+ # a suitable version is already installed
+ return
+ except ImportError:
+ # pkg_resources not available; setuptools is not installed; download
+ pass
+ except pkg_resources.DistributionNotFound:
+ # no version of setuptools was found; allow download
+ pass
+ except pkg_resources.VersionConflict as VC_err:
+ if imported:
+ _conflict_bail(VC_err, version)
+
+ # otherwise, unload pkg_resources to allow the downloaded version to
+ # take precedence.
+ del pkg_resources
+ _unload_pkg_resources()
+
+ return _do_download(version, download_base, to_dir, download_delay)
+
+
+def _conflict_bail(VC_err, version):
+ """
+ Setuptools was imported prior to invocation, so it is
+ unsafe to unload it. Bail out.
+ """
+ conflict_tmpl = textwrap.dedent("""
+ The required version of setuptools (>={version}) is not available,
+ and can't be installed while this script is running. Please
+ install a more recent version first, using
+ 'easy_install -U setuptools'.
+
+ (Currently using {VC_err.args[0]!r})
+ """)
+ msg = conflict_tmpl.format(**locals())
+ sys.stderr.write(msg)
+ sys.exit(2)
+
+
+def _unload_pkg_resources():
+ sys.meta_path = [
+ importer
+ for importer in sys.meta_path
+ if importer.__class__.__module__ != 'pkg_resources.extern'
+ ]
+ del_modules = [
+ name for name in sys.modules
+ if name.startswith('pkg_resources')
+ ]
+ for mod_name in del_modules:
+ del sys.modules[mod_name]
+
+
+def _clean_check(cmd, target):
+ """
+ Run the command to download target.
+
+ If the command fails, clean up before re-raising the error.
+ """
+ try:
+ subprocess.check_call(cmd)
+ except subprocess.CalledProcessError:
+ if os.access(target, os.F_OK):
+ os.unlink(target)
+ raise
+
+
+def download_file_powershell(url, target):
+ """
+ Download the file at url to target using Powershell.
+
+ Powershell will validate trust.
+ Raise an exception if the command cannot complete.
+ """
+ target = os.path.abspath(target)
+ ps_cmd = (
+ "[System.Net.WebRequest]::DefaultWebProxy.Credentials = "
+ "[System.Net.CredentialCache]::DefaultCredentials; "
+ '(new-object System.Net.WebClient).DownloadFile("%(url)s", "%(target)s")'
+ % locals()
+ )
+ cmd = [
+ 'powershell',
+ '-Command',
+ ps_cmd,
+ ]
+ _clean_check(cmd, target)
+
+
+def has_powershell():
+ """Determine if Powershell is available."""
+ if platform.system() != 'Windows':
+ return False
+ cmd = ['powershell', '-Command', 'echo test']
+ with open(os.path.devnull, 'wb') as devnull:
+ try:
+ subprocess.check_call(cmd, stdout=devnull, stderr=devnull)
+ except Exception:
+ return False
+ return True
+download_file_powershell.viable = has_powershell
+
+
+def download_file_curl(url, target):
+ cmd = ['curl', url, '--location', '--silent', '--output', target]
+ _clean_check(cmd, target)
+
+
+def has_curl():
+ cmd = ['curl', '--version']
+ with open(os.path.devnull, 'wb') as devnull:
+ try:
+ subprocess.check_call(cmd, stdout=devnull, stderr=devnull)
+ except Exception:
+ return False
+ return True
+download_file_curl.viable = has_curl
+
+
+def download_file_wget(url, target):
+ cmd = ['wget', url, '--quiet', '--output-document', target]
+ _clean_check(cmd, target)
+
+
+def has_wget():
+ cmd = ['wget', '--version']
+ with open(os.path.devnull, 'wb') as devnull:
+ try:
+ subprocess.check_call(cmd, stdout=devnull, stderr=devnull)
+ except Exception:
+ return False
+ return True
+download_file_wget.viable = has_wget
+
+
+def download_file_insecure(url, target):
+ """Use Python to download the file, without connection authentication."""
+ src = urlopen(url)
+ try:
+ # Read all the data in one block.
+ data = src.read()
+ finally:
+ src.close()
+
+ # Write all the data in one block to avoid creating a partial file.
+ with open(target, "wb") as dst:
+ dst.write(data)
+download_file_insecure.viable = lambda: True
+
+
+def get_best_downloader():
+ downloaders = (
+ download_file_powershell,
+ download_file_curl,
+ download_file_wget,
+ download_file_insecure,
+ )
+ viable_downloaders = (dl for dl in downloaders if dl.viable())
+ return next(viable_downloaders, None)
+
+
+def download_setuptools(
+ version=DEFAULT_VERSION, download_base=DEFAULT_URL,
+ to_dir=DEFAULT_SAVE_DIR, delay=15,
+ downloader_factory=get_best_downloader):
+ """
+ Download setuptools from a specified location and return its filename.
+
+ `version` should be a valid setuptools version number that is available
+ as an sdist 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.
+
+ ``downloader_factory`` should be a function taking no arguments and
+ returning a function for downloading a URL to a target.
+ """
+ version = _resolve_version(version)
+ # making sure we use the absolute path
+ to_dir = os.path.abspath(to_dir)
+ zip_name = "setuptools-%s.zip" % version
+ url = download_base + zip_name
+ saveto = os.path.join(to_dir, zip_name)
+ if not os.path.exists(saveto): # Avoid repeated downloads
+ log.warn("Downloading %s", url)
+ downloader = downloader_factory()
+ downloader(url, saveto)
+ return os.path.realpath(saveto)
+
+
+def _resolve_version(version):
+ """
+ Resolve LATEST version
+ """
+ if version is not LATEST:
+ return version
+
+ meta_url = urljoin(DEFAULT_URL, '/pypi/setuptools/json')
+ resp = urlopen(meta_url)
+ with contextlib.closing(resp):
+ try:
+ charset = resp.info().get_content_charset()
+ except Exception:
+ # Python 2 compat; assume UTF-8
+ charset = 'UTF-8'
+ reader = codecs.getreader(charset)
+ doc = json.load(reader(resp))
+
+ return str(doc['info']['version'])
+
+
+def _build_install_args(options):
+ """
+ Build the arguments to 'python setup.py install' on the setuptools package.
+
+ Returns list of command line arguments.
+ """
+ return ['--user'] if options.user_install else []
+
+
+def _parse_args():
+ """Parse the command line for options."""
+ parser = optparse.OptionParser()
+ parser.add_option(
+ '--user', dest='user_install', action='store_true', default=False,
+ help='install in user site package')
+ parser.add_option(
+ '--download-base', dest='download_base', metavar="URL",
+ default=DEFAULT_URL,
+ help='alternative URL from where to download the setuptools package')
+ parser.add_option(
+ '--insecure', dest='downloader_factory', action='store_const',
+ const=lambda: download_file_insecure, default=get_best_downloader,
+ help='Use internal, non-validating downloader'
+ )
+ parser.add_option(
+ '--version', help="Specify which version to download",
+ default=DEFAULT_VERSION,
+ )
+ parser.add_option(
+ '--to-dir',
+ help="Directory to save (and re-use) package",
+ default=DEFAULT_SAVE_DIR,
+ )
+ options, args = parser.parse_args()
+ # positional arguments are ignored
+ return options
+
+
+def _download_args(options):
+ """Return args for download_setuptools function from cmdline args."""
+ return dict(
+ version=options.version,
+ download_base=options.download_base,
+ downloader_factory=options.downloader_factory,
+ to_dir=options.to_dir,
+ )
+
+
+def main():
+ """Install or upgrade setuptools and EasyInstall."""
+ options = _parse_args()
+ archive = download_setuptools(**_download_args(options))
+ return _install(archive, _build_install_args(options))
+
+if __name__ == '__main__':
+ sys.exit(main())
Code Review / dovetail.git / commitdiff