diff options
Diffstat (limited to 'ez_setup.py')
| -rw-r--r-- | ez_setup.py | 427 |
1 files changed, 0 insertions, 427 deletions
diff --git a/ez_setup.py b/ez_setup.py deleted file mode 100644 index 36da1e62..00000000 --- a/ez_setup.py +++ /dev/null @@ -1,427 +0,0 @@ -#!/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()) |