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Python 3 compatible bootstrap.py
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@kedder
kedder committed Feb 27, 2013
1 parent 3178e7e commit 94d5c1f
Showing 1 changed file with 59 additions and 154 deletions.
213 changes: 59 additions & 154 deletions bootstrap.py
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Expand Up @@ -18,74 +18,10 @@
use the -c option to specify an alternate configuration file.
"""

import os, shutil, sys, tempfile, textwrap, urllib, urllib2, subprocess
import os, shutil, sys, tempfile
from optparse import OptionParser

if sys.platform == 'win32':
def quote(c):
if ' ' in c:
return '"%s"' % c # work around spawn lamosity on windows
else:
return c
else:
quote = str

# See zc.buildout.easy_install._has_broken_dash_S for motivation and comments.
stdout, stderr = subprocess.Popen(
[sys.executable, '-Sc',
'try:\n'
' import ConfigParser\n'
'except ImportError:\n'
' print 1\n'
'else:\n'
' print 0\n'],
stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
has_broken_dash_S = bool(int(stdout.strip()))

# In order to be more robust in the face of system Pythons, we want to
# run without site-packages loaded. This is somewhat tricky, in
# particular because Python 2.6's distutils imports site, so starting
# with the -S flag is not sufficient. However, we'll start with that:
if not has_broken_dash_S and 'site' in sys.modules:
# We will restart with python -S.
args = sys.argv[:]
args[0:0] = [sys.executable, '-S']
args = map(quote, args)
os.execv(sys.executable, args)
# Now we are running with -S. We'll get the clean sys.path, import site
# because distutils will do it later, and then reset the path and clean
# out any namespace packages from site-packages that might have been
# loaded by .pth files.
clean_path = sys.path[:]
import site
sys.path[:] = clean_path
for k, v in sys.modules.items():
if k in ('setuptools', 'pkg_resources') or (
hasattr(v, '__path__') and
len(v.__path__)==1 and
not os.path.exists(os.path.join(v.__path__[0],'__init__.py'))):
# This is a namespace package. Remove it.
sys.modules.pop(k)

is_jython = sys.platform.startswith('java')

setuptools_source = 'http://peak.telecommunity.com/dist/ez_setup.py'
distribute_source = 'http://python-distribute.org/distribute_setup.py'

# parsing arguments
def normalize_to_url(option, opt_str, value, parser):
if value:
if '://' not in value: # It doesn't smell like a URL.
value = 'file://%s' % (
urllib.pathname2url(
os.path.abspath(os.path.expanduser(value))),)
if opt_str == '--download-base' and not value.endswith('/'):
# Download base needs a trailing slash to make the world happy.
value += '/'
else:
value = None
name = opt_str[2:].replace('-', '_')
setattr(parser.values, name, value)
tmpeggs = tempfile.mkdtemp()

usage = '''\
[DESIRED PYTHON FOR BUILDOUT] bootstrap.py [options]
Expand All @@ -100,26 +36,8 @@ def normalize_to_url(option, opt_str, value, parser):
'''

parser = OptionParser(usage=usage)
parser.add_option("-v", "--version", dest="version",
help="use a specific zc.buildout version")
parser.add_option("-d", "--distribute",
action="store_true", dest="use_distribute", default=False,
help="Use Distribute rather than Setuptools.")
parser.add_option("--setup-source", action="callback", dest="setup_source",
callback=normalize_to_url, nargs=1, type="string",
help=("Specify a URL or file location for the setup file. "
"If you use Setuptools, this will default to " +
setuptools_source + "; if you use Distribute, this "
"will default to " + distribute_source +"."))
parser.add_option("--download-base", action="callback", dest="download_base",
callback=normalize_to_url, nargs=1, type="string",
help=("Specify a URL or directory for downloading "
"zc.buildout and either Setuptools or Distribute. "
"Defaults to PyPI."))
parser.add_option("--eggs",
help=("Specify a directory for storing eggs. Defaults to "
"a temporary directory that is deleted when the "
"bootstrap script completes."))
parser.add_option("-v", "--version", help="use a specific zc.buildout version")

parser.add_option("-t", "--accept-buildout-test-releases",
dest='accept_buildout_test_releases',
action="store_true", default=False,
Expand All @@ -129,81 +47,65 @@ def normalize_to_url(option, opt_str, value, parser):
"extensions for you. If you use this flag, "
"bootstrap and buildout will get the newest releases "
"even if they are alphas or betas."))
parser.add_option("-c", None, action="store", dest="config_file",
parser.add_option("-c", "--config-file",
help=("Specify the path to the buildout configuration "
"file to be used."))
parser.add_option("-f", "--find-links",
help=("Specify a URL to search for buildout releases"))

options, args = parser.parse_args()

# if -c was provided, we push it back into args for buildout's main function
if options.config_file is not None:
args += ['-c', options.config_file]

if options.eggs:
eggs_dir = os.path.abspath(os.path.expanduser(options.eggs))
else:
eggs_dir = tempfile.mkdtemp()

if options.setup_source is None:
if options.use_distribute:
options.setup_source = distribute_source
else:
options.setup_source = setuptools_source
options, args = parser.parse_args()

if options.accept_buildout_test_releases:
args.append('buildout:accept-buildout-test-releases=true')
args.append('bootstrap')
######################################################################
# load/install distribute

to_reload = False
try:
import pkg_resources
import setuptools # A flag. Sometimes pkg_resources is installed alone.
import pkg_resources, setuptools
if not hasattr(pkg_resources, '_distribute'):
to_reload = True
raise ImportError
except ImportError:
ez_code = urllib2.urlopen(
options.setup_source).read().replace('\r\n', '\n')
ez = {}
exec ez_code in ez
setup_args = dict(to_dir=eggs_dir, download_delay=0)
if options.download_base:
setup_args['download_base'] = options.download_base
if options.use_distribute:
setup_args['no_fake'] = True

try:
from urllib.request import urlopen
except ImportError:
from urllib2 import urlopen

exec(urlopen('http://python-distribute.org/distribute_setup.py').read(), ez)
setup_args = dict(to_dir=tmpeggs, download_delay=0, no_fake=True)
ez['use_setuptools'](**setup_args)
if 'pkg_resources' in sys.modules:
reload(sys.modules['pkg_resources'])

if to_reload:
reload(pkg_resources)
import pkg_resources
# This does not (always?) update the default working set. We will
# do it.
for path in sys.path:
if path not in pkg_resources.working_set.entries:
pkg_resources.working_set.add_entry(path)

cmd = [quote(sys.executable),
'-c',
quote('from setuptools.command.easy_install import main; main()'),
'-mqNxd',
quote(eggs_dir)]
######################################################################
# Install buildout

ws = pkg_resources.working_set

if not has_broken_dash_S:
cmd.insert(1, '-S')
cmd = [sys.executable, '-c',
'from setuptools.command.easy_install import main; main()',
'-mZqNxd', tmpeggs]

find_links = options.download_base
if not find_links:
find_links = os.environ.get('bootstrap-testing-find-links')
find_links = os.environ.get(
'bootstrap-testing-find-links',
options.find_links or
('http://downloads.buildout.org/'
if options.accept_buildout_test_releases else None)
)
if find_links:
cmd.extend(['-f', quote(find_links)])
cmd.extend(['-f', find_links])

if options.use_distribute:
setup_requirement = 'distribute'
else:
setup_requirement = 'setuptools'
ws = pkg_resources.working_set
setup_requirement_path = ws.find(
pkg_resources.Requirement.parse(setup_requirement)).location
env = dict(
os.environ,
PYTHONPATH=setup_requirement_path)
distribute_path = ws.find(
pkg_resources.Requirement.parse('distribute')).location

requirement = 'zc.buildout'
version = options.version
Expand All @@ -217,7 +119,7 @@ def _final_version(parsed_version):
return False
return True
index = setuptools.package_index.PackageIndex(
search_path=[setup_requirement_path])
search_path=[distribute_path])
if find_links:
index.add_find_links((find_links,))
req = pkg_resources.Requirement.parse(requirement)
Expand All @@ -239,22 +141,25 @@ def _final_version(parsed_version):
requirement = '=='.join((requirement, version))
cmd.append(requirement)

if is_jython:
import subprocess
exitcode = subprocess.Popen(cmd, env=env).wait()
else: # Windows prefers this, apparently; otherwise we would prefer subprocess
exitcode = os.spawnle(*([os.P_WAIT, sys.executable] + cmd + [env]))
if exitcode != 0:
sys.stdout.flush()
sys.stderr.flush()
print ("An error occurred when trying to install zc.buildout. "
"Look above this message for any errors that "
"were output by easy_install.")
sys.exit(exitcode)
import subprocess
if subprocess.call(cmd, env=dict(os.environ, PYTHONPATH=distribute_path)) != 0:
raise Exception(
"Failed to execute command:\n%s",
repr(cmd)[1:-1])

ws.add_entry(eggs_dir)
######################################################################
# Import and run buildout

ws.add_entry(tmpeggs)
ws.require(requirement)
import zc.buildout.buildout

if not [a for a in args if '=' not in a]:
args.append('bootstrap')

# if -c was provided, we push it back into args for buildout' main function
if options.config_file is not None:
args[0:0] = ['-c', options.config_file]

zc.buildout.buildout.main(args)
if not options.eggs: # clean up temporary egg directory
shutil.rmtree(eggs_dir)
shutil.rmtree(tmpeggs)

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