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virtualenv.py
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virtualenv.py
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#!/usr/bin/env python
"""Create a "virtual" Python installation
"""
virtualenv_version = "1.4.8"
import sys
import os
import optparse
import re
import shutil
import logging
import distutils.sysconfig
try:
import subprocess
except ImportError, e:
if sys.version_info <= (2, 3):
print 'ERROR: %s' % e
print 'ERROR: this script requires Python 2.4 or greater; or at least the subprocess module.'
print 'If you copy subprocess.py from a newer version of Python this script will probably work'
sys.exit(101)
else:
raise
try:
set
except NameError:
from sets import Set as set
join = os.path.join
py_version = 'python%s.%s' % (sys.version_info[0], sys.version_info[1])
is_jython = sys.platform.startswith('java')
expected_exe = is_jython and 'jython' or 'python'
REQUIRED_MODULES = ['os', 'posix', 'posixpath', 'nt', 'ntpath', 'genericpath',
'fnmatch', 'locale', 'encodings', 'codecs',
'stat', 'UserDict', 'readline', 'copy_reg', 'types',
're', 'sre', 'sre_parse', 'sre_constants', 'sre_compile',
'lib-dynload', 'config', 'zlib']
if sys.version_info[:2] >= (2, 6):
REQUIRED_MODULES.extend(['warnings', 'linecache', '_abcoll', 'abc'])
if sys.version_info[:2] <= (2, 3):
REQUIRED_MODULES.extend(['sets', '__future__'])
class Logger(object):
"""
Logging object for use in command-line script. Allows ranges of
levels, to avoid some redundancy of displayed information.
"""
DEBUG = logging.DEBUG
INFO = logging.INFO
NOTIFY = (logging.INFO+logging.WARN)/2
WARN = WARNING = logging.WARN
ERROR = logging.ERROR
FATAL = logging.FATAL
LEVELS = [DEBUG, INFO, NOTIFY, WARN, ERROR, FATAL]
def __init__(self, consumers):
self.consumers = consumers
self.indent = 0
self.in_progress = None
self.in_progress_hanging = False
def debug(self, msg, *args, **kw):
self.log(self.DEBUG, msg, *args, **kw)
def info(self, msg, *args, **kw):
self.log(self.INFO, msg, *args, **kw)
def notify(self, msg, *args, **kw):
self.log(self.NOTIFY, msg, *args, **kw)
def warn(self, msg, *args, **kw):
self.log(self.WARN, msg, *args, **kw)
def error(self, msg, *args, **kw):
self.log(self.WARN, msg, *args, **kw)
def fatal(self, msg, *args, **kw):
self.log(self.FATAL, msg, *args, **kw)
def log(self, level, msg, *args, **kw):
if args:
if kw:
raise TypeError(
"You may give positional or keyword arguments, not both")
args = args or kw
rendered = None
for consumer_level, consumer in self.consumers:
if self.level_matches(level, consumer_level):
if (self.in_progress_hanging
and consumer in (sys.stdout, sys.stderr)):
self.in_progress_hanging = False
sys.stdout.write('\n')
sys.stdout.flush()
if rendered is None:
if args:
rendered = msg % args
else:
rendered = msg
rendered = ' '*self.indent + rendered
if hasattr(consumer, 'write'):
consumer.write(rendered+'\n')
else:
consumer(rendered)
def start_progress(self, msg):
assert not self.in_progress, (
"Tried to start_progress(%r) while in_progress %r"
% (msg, self.in_progress))
if self.level_matches(self.NOTIFY, self._stdout_level()):
sys.stdout.write(msg)
sys.stdout.flush()
self.in_progress_hanging = True
else:
self.in_progress_hanging = False
self.in_progress = msg
def end_progress(self, msg='done.'):
assert self.in_progress, (
"Tried to end_progress without start_progress")
if self.stdout_level_matches(self.NOTIFY):
if not self.in_progress_hanging:
# Some message has been printed out since start_progress
sys.stdout.write('...' + self.in_progress + msg + '\n')
sys.stdout.flush()
else:
sys.stdout.write(msg + '\n')
sys.stdout.flush()
self.in_progress = None
self.in_progress_hanging = False
def show_progress(self):
"""If we are in a progress scope, and no log messages have been
shown, write out another '.'"""
if self.in_progress_hanging:
sys.stdout.write('.')
sys.stdout.flush()
def stdout_level_matches(self, level):
"""Returns true if a message at this level will go to stdout"""
return self.level_matches(level, self._stdout_level())
def _stdout_level(self):
"""Returns the level that stdout runs at"""
for level, consumer in self.consumers:
if consumer is sys.stdout:
return level
return self.FATAL
def level_matches(self, level, consumer_level):
"""
>>> l = Logger()
>>> l.level_matches(3, 4)
False
>>> l.level_matches(3, 2)
True
>>> l.level_matches(slice(None, 3), 3)
False
>>> l.level_matches(slice(None, 3), 2)
True
>>> l.level_matches(slice(1, 3), 1)
True
>>> l.level_matches(slice(2, 3), 1)
False
"""
if isinstance(level, slice):
start, stop = level.start, level.stop
if start is not None and start > consumer_level:
return False
if stop is not None or stop <= consumer_level:
return False
return True
else:
return level >= consumer_level
#@classmethod
def level_for_integer(cls, level):
levels = cls.LEVELS
if level < 0:
return levels[0]
if level >= len(levels):
return levels[-1]
return levels[level]
level_for_integer = classmethod(level_for_integer)
def mkdir(path):
if not os.path.exists(path):
logger.info('Creating %s', path)
os.makedirs(path)
else:
logger.info('Directory %s already exists', path)
def copyfile(src, dest, symlink=True):
if not os.path.exists(src):
# Some bad symlink in the src
logger.warn('Cannot find file %s (bad symlink)', src)
return
if os.path.exists(dest):
logger.debug('File %s already exists', dest)
return
if not os.path.exists(os.path.dirname(dest)):
logger.info('Creating parent directories for %s' % os.path.dirname(dest))
os.makedirs(os.path.dirname(dest))
if symlink and hasattr(os, 'symlink'):
logger.info('Symlinking %s', dest)
os.symlink(os.path.abspath(src), dest)
else:
logger.info('Copying to %s', dest)
if os.path.isdir(src):
shutil.copytree(src, dest, True)
else:
shutil.copy2(src, dest)
def writefile(dest, content, overwrite=True):
if not os.path.exists(dest):
logger.info('Writing %s', dest)
f = open(dest, 'wb')
f.write(content)
f.close()
return
else:
f = open(dest, 'rb')
c = f.read()
f.close()
if c != content:
if not overwrite:
logger.notify('File %s exists with different content; not overwriting', dest)
return
logger.notify('Overwriting %s with new content', dest)
f = open(dest, 'wb')
f.write(content)
f.close()
else:
logger.info('Content %s already in place', dest)
def rmtree(dir):
if os.path.exists(dir):
logger.notify('Deleting tree %s', dir)
shutil.rmtree(dir)
else:
logger.info('Do not need to delete %s; already gone', dir)
def make_exe(fn):
if hasattr(os, 'chmod'):
oldmode = os.stat(fn).st_mode & 07777
newmode = (oldmode | 0555) & 07777
os.chmod(fn, newmode)
logger.info('Changed mode of %s to %s', fn, oct(newmode))
def _find_file(filename, dirs):
for dir in dirs:
if os.path.exists(join(dir, filename)):
return join(dir, filename)
return filename
def _install_req(py_executable, unzip=False, distribute=False):
if not distribute:
setup_fn = 'setuptools-0.6c11-py%s.egg' % sys.version[:3]
project_name = 'setuptools'
bootstrap_script = EZ_SETUP_PY
source = None
else:
setup_fn = None
source = 'distribute-0.6.8.tar.gz'
project_name = 'distribute'
bootstrap_script = DISTRIBUTE_SETUP_PY
try:
# check if the global Python has distribute installed or plain
# setuptools
import pkg_resources
if not hasattr(pkg_resources, '_distribute'):
location = os.path.dirname(pkg_resources.__file__)
logger.notify("A globally installed setuptools was found (in %s)" % location)
logger.notify("Use the --no-site-packages option to use distribute in "
"the virtualenv.")
except ImportError:
pass
search_dirs = file_search_dirs()
if setup_fn is not None:
setup_fn = _find_file(setup_fn, search_dirs)
if source is not None:
source = _find_file(source, search_dirs)
if is_jython and os._name == 'nt':
# Jython's .bat sys.executable can't handle a command line
# argument with newlines
import tempfile
fd, ez_setup = tempfile.mkstemp('.py')
os.write(fd, bootstrap_script)
os.close(fd)
cmd = [py_executable, ez_setup]
else:
cmd = [py_executable, '-c', bootstrap_script]
if unzip:
cmd.append('--always-unzip')
env = {}
if logger.stdout_level_matches(logger.DEBUG):
cmd.append('-v')
old_chdir = os.getcwd()
if setup_fn is not None and os.path.exists(setup_fn):
logger.info('Using existing %s egg: %s' % (project_name, setup_fn))
cmd.append(setup_fn)
if os.environ.get('PYTHONPATH'):
env['PYTHONPATH'] = setup_fn + os.path.pathsep + os.environ['PYTHONPATH']
else:
env['PYTHONPATH'] = setup_fn
else:
# the source is found, let's chdir
if source is not None and os.path.exists(source):
os.chdir(os.path.dirname(source))
else:
logger.info('No %s egg found; downloading' % project_name)
cmd.extend(['--always-copy', '-U', project_name])
logger.start_progress('Installing %s...' % project_name)
logger.indent += 2
cwd = None
if project_name == 'distribute':
env['DONT_PATCH_SETUPTOOLS'] = 'true'
def _filter_ez_setup(line):
return filter_ez_setup(line, project_name)
if not os.access(os.getcwd(), os.W_OK):
cwd = '/tmp'
if source is not None and os.path.exists(source):
# the current working dir is hostile, let's copy the
# tarball to /tmp
target = os.path.join(cwd, os.path.split(source)[-1])
shutil.copy(source, target)
try:
call_subprocess(cmd, show_stdout=False,
filter_stdout=_filter_ez_setup,
extra_env=env,
cwd=cwd)
finally:
logger.indent -= 2
logger.end_progress()
if os.getcwd() != old_chdir:
os.chdir(old_chdir)
if is_jython and os._name == 'nt':
os.remove(ez_setup)
def file_search_dirs():
here = os.path.dirname(os.path.abspath(__file__))
dirs = ['.', here,
join(here, 'virtualenv_support')]
if os.path.splitext(os.path.dirname(__file__))[0] != 'virtualenv':
# Probably some boot script; just in case virtualenv is installed...
try:
import virtualenv
except ImportError:
pass
else:
dirs.append(os.path.join(os.path.dirname(virtualenv.__file__), 'virtualenv_support'))
return [d for d in dirs if os.path.isdir(d)]
def install_setuptools(py_executable, unzip=False):
_install_req(py_executable, unzip)
def install_distribute(py_executable, unzip=False):
_install_req(py_executable, unzip, distribute=True)
_pip_re = re.compile(r'^pip-.*(zip|tar.gz|tar.bz2|tgz|tbz)$', re.I)
def install_pip(py_executable):
filenames = []
for dir in file_search_dirs():
filenames.extend([join(dir, fn) for fn in os.listdir(dir)
if _pip_re.search(fn)])
filenames.sort(key=lambda x: os.path.basename(x).lower())
if not filenames:
filename = 'pip'
else:
filename = filenames[-1]
easy_install_script = 'easy_install'
if sys.platform == 'win32':
easy_install_script = 'easy_install-script.py'
cmd = [py_executable, join(os.path.dirname(py_executable), easy_install_script), filename]
if filename == 'pip':
logger.info('Installing pip from network...')
else:
logger.info('Installing %s' % os.path.basename(filename))
logger.indent += 2
def _filter_setup(line):
return filter_ez_setup(line, 'pip')
try:
call_subprocess(cmd, show_stdout=False,
filter_stdout=_filter_setup)
finally:
logger.indent -= 2
def filter_ez_setup(line, project_name='setuptools'):
if not line.strip():
return Logger.DEBUG
if project_name == 'distribute':
for prefix in ('Extracting', 'Now working', 'Installing', 'Before',
'Scanning', 'Setuptools', 'Egg', 'Already',
'running', 'writing', 'reading', 'installing',
'creating', 'copying', 'byte-compiling', 'removing',
'Processing'):
if line.startswith(prefix):
return Logger.DEBUG
return Logger.DEBUG
for prefix in ['Reading ', 'Best match', 'Processing setuptools',
'Copying setuptools', 'Adding setuptools',
'Installing ', 'Installed ']:
if line.startswith(prefix):
return Logger.DEBUG
return Logger.INFO
def main():
parser = optparse.OptionParser(
version=virtualenv_version,
usage="%prog [OPTIONS] DEST_DIR")
parser.add_option(
'-v', '--verbose',
action='count',
dest='verbose',
default=0,
help="Increase verbosity")
parser.add_option(
'-q', '--quiet',
action='count',
dest='quiet',
default=0,
help='Decrease verbosity')
parser.add_option(
'-p', '--python',
dest='python',
metavar='PYTHON_EXE',
help='The Python interpreter to use, e.g., --python=python2.5 will use the python2.5 '
'interpreter to create the new environment. The default is the interpreter that '
'virtualenv was installed with (%s)' % sys.executable)
parser.add_option(
'--clear',
dest='clear',
action='store_true',
help="Clear out the non-root install and start from scratch")
parser.add_option(
'--no-site-packages',
dest='no_site_packages',
action='store_true',
help="Don't give access to the global site-packages dir to the "
"virtual environment")
parser.add_option(
'--unzip-setuptools',
dest='unzip_setuptools',
action='store_true',
help="Unzip Setuptools or Distribute when installing it")
parser.add_option(
'--relocatable',
dest='relocatable',
action='store_true',
help='Make an EXISTING virtualenv environment relocatable. '
'This fixes up scripts and makes all .pth files relative')
parser.add_option(
'--distribute',
dest='use_distribute',
action='store_true',
help='Use Distribute instead of Setuptools. Set environ variable'
'VIRTUALENV_USE_DISTRIBUTE to make it the default ')
if 'extend_parser' in globals():
extend_parser(parser)
options, args = parser.parse_args()
global logger
if 'adjust_options' in globals():
adjust_options(options, args)
verbosity = options.verbose - options.quiet
logger = Logger([(Logger.level_for_integer(2-verbosity), sys.stdout)])
if options.python and not os.environ.get('VIRTUALENV_INTERPRETER_RUNNING'):
env = os.environ.copy()
interpreter = resolve_interpreter(options.python)
if interpreter == sys.executable:
logger.warn('Already using interpreter %s' % interpreter)
else:
logger.notify('Running virtualenv with interpreter %s' % interpreter)
env['VIRTUALENV_INTERPRETER_RUNNING'] = 'true'
file = __file__
if file.endswith('.pyc'):
file = file[:-1]
os.execvpe(interpreter, [interpreter, file] + sys.argv[1:], env)
if not args:
print 'You must provide a DEST_DIR'
parser.print_help()
sys.exit(2)
if len(args) > 1:
print 'There must be only one argument: DEST_DIR (you gave %s)' % (
' '.join(args))
parser.print_help()
sys.exit(2)
home_dir = args[0]
if os.environ.get('WORKING_ENV'):
logger.fatal('ERROR: you cannot run virtualenv while in a workingenv')
logger.fatal('Please deactivate your workingenv, then re-run this script')
sys.exit(3)
if 'PYTHONHOME' in os.environ:
logger.warn('PYTHONHOME is set. You *must* activate the virtualenv before using it')
del os.environ['PYTHONHOME']
if options.relocatable:
make_environment_relocatable(home_dir)
return
create_environment(home_dir, site_packages=not options.no_site_packages, clear=options.clear,
unzip_setuptools=options.unzip_setuptools,
use_distribute=options.use_distribute)
if 'after_install' in globals():
after_install(options, home_dir)
def call_subprocess(cmd, show_stdout=True,
filter_stdout=None, cwd=None,
raise_on_returncode=True, extra_env=None):
cmd_parts = []
for part in cmd:
if len(part) > 40:
part = part[:30]+"..."+part[-5:]
if ' ' in part or '\n' in part or '"' in part or "'" in part:
part = '"%s"' % part.replace('"', '\\"')
cmd_parts.append(part)
cmd_desc = ' '.join(cmd_parts)
if show_stdout:
stdout = None
else:
stdout = subprocess.PIPE
logger.debug("Running command %s" % cmd_desc)
if extra_env:
env = os.environ.copy()
env.update(extra_env)
else:
env = None
try:
proc = subprocess.Popen(
cmd, stderr=subprocess.STDOUT, stdin=None, stdout=stdout,
cwd=cwd, env=env)
except Exception, e:
logger.fatal(
"Error %s while executing command %s" % (e, cmd_desc))
raise
all_output = []
if stdout is not None:
stdout = proc.stdout
while 1:
line = stdout.readline()
if not line:
break
line = line.rstrip()
all_output.append(line)
if filter_stdout:
level = filter_stdout(line)
if isinstance(level, tuple):
level, line = level
logger.log(level, line)
if not logger.stdout_level_matches(level):
logger.show_progress()
else:
logger.info(line)
else:
proc.communicate()
proc.wait()
if proc.returncode:
if raise_on_returncode:
if all_output:
logger.notify('Complete output from command %s:' % cmd_desc)
logger.notify('\n'.join(all_output) + '\n----------------------------------------')
raise OSError(
"Command %s failed with error code %s"
% (cmd_desc, proc.returncode))
else:
logger.warn(
"Command %s had error code %s"
% (cmd_desc, proc.returncode))
def create_environment(home_dir, site_packages=True, clear=False,
unzip_setuptools=False, use_distribute=False):
"""
Creates a new environment in ``home_dir``.
If ``site_packages`` is true (the default) then the global
``site-packages/`` directory will be on the path.
If ``clear`` is true (default False) then the environment will
first be cleared.
"""
home_dir, lib_dir, inc_dir, bin_dir = path_locations(home_dir)
py_executable = os.path.abspath(install_python(
home_dir, lib_dir, inc_dir, bin_dir,
site_packages=site_packages, clear=clear))
install_distutils(lib_dir, home_dir)
if use_distribute or os.environ.get('VIRTUALENV_USE_DISTRIBUTE'):
install_distribute(py_executable, unzip=unzip_setuptools)
else:
install_setuptools(py_executable, unzip=unzip_setuptools)
install_pip(py_executable)
install_activate(home_dir, bin_dir)
def path_locations(home_dir):
"""Return the path locations for the environment (where libraries are,
where scripts go, etc)"""
# XXX: We'd use distutils.sysconfig.get_python_inc/lib but its
# prefix arg is broken: http://bugs.python.org/issue3386
if sys.platform == 'win32':
# Windows has lots of problems with executables with spaces in
# the name; this function will remove them (using the ~1
# format):
mkdir(home_dir)
if ' ' in home_dir:
try:
import win32api
except ImportError:
print 'Error: the path "%s" has a space in it' % home_dir
print 'To handle these kinds of paths, the win32api module must be installed:'
print ' http://sourceforge.net/projects/pywin32/'
sys.exit(3)
home_dir = win32api.GetShortPathName(home_dir)
lib_dir = join(home_dir, 'Lib')
inc_dir = join(home_dir, 'Include')
bin_dir = join(home_dir, 'Scripts')
elif is_jython:
lib_dir = join(home_dir, 'Lib')
inc_dir = join(home_dir, 'Include')
bin_dir = join(home_dir, 'bin')
else:
lib_dir = join(home_dir, 'lib', py_version)
inc_dir = join(home_dir, 'include', py_version)
bin_dir = join(home_dir, 'bin')
return home_dir, lib_dir, inc_dir, bin_dir
def install_python(home_dir, lib_dir, inc_dir, bin_dir, site_packages, clear):
"""Install just the base environment, no distutils patches etc"""
if sys.executable.startswith(bin_dir):
print 'Please use the *system* python to run this script'
return
if clear:
rmtree(lib_dir)
## FIXME: why not delete it?
## Maybe it should delete everything with #!/path/to/venv/python in it
logger.notify('Not deleting %s', bin_dir)
if hasattr(sys, 'real_prefix'):
logger.notify('Using real prefix %r' % sys.real_prefix)
prefix = sys.real_prefix
else:
prefix = sys.prefix
mkdir(lib_dir)
fix_lib64(lib_dir)
stdlib_dirs = [os.path.dirname(os.__file__)]
if sys.platform == 'win32':
stdlib_dirs.append(join(os.path.dirname(stdlib_dirs[0]), 'DLLs'))
elif sys.platform == 'darwin':
stdlib_dirs.append(join(stdlib_dirs[0], 'site-packages'))
for stdlib_dir in stdlib_dirs:
if not os.path.isdir(stdlib_dir):
continue
if hasattr(os, 'symlink'):
logger.info('Symlinking Python bootstrap modules')
else:
logger.info('Copying Python bootstrap modules')
logger.indent += 2
try:
for fn in os.listdir(stdlib_dir):
if fn != 'site-packages' and os.path.splitext(fn)[0] in REQUIRED_MODULES:
copyfile(join(stdlib_dir, fn), join(lib_dir, fn))
finally:
logger.indent -= 2
mkdir(join(lib_dir, 'site-packages'))
writefile(join(lib_dir, 'site.py'), SITE_PY)
writefile(join(lib_dir, 'orig-prefix.txt'), prefix)
site_packages_filename = join(lib_dir, 'no-global-site-packages.txt')
if not site_packages:
writefile(site_packages_filename, '')
else:
if os.path.exists(site_packages_filename):
logger.info('Deleting %s' % site_packages_filename)
os.unlink(site_packages_filename)
stdinc_dir = join(prefix, 'include', py_version)
if os.path.exists(stdinc_dir):
copyfile(stdinc_dir, inc_dir)
else:
logger.debug('No include dir %s' % stdinc_dir)
if sys.exec_prefix != prefix:
if sys.platform == 'win32':
exec_dir = join(sys.exec_prefix, 'lib')
elif is_jython:
exec_dir = join(sys.exec_prefix, 'Lib')
else:
exec_dir = join(sys.exec_prefix, 'lib', py_version)
for fn in os.listdir(exec_dir):
copyfile(join(exec_dir, fn), join(lib_dir, fn))
if is_jython:
# Jython has either jython-dev.jar and javalib/ dir, or just
# jython.jar
for name in 'jython-dev.jar', 'javalib', 'jython.jar':
src = join(prefix, name)
if os.path.exists(src):
copyfile(src, join(home_dir, name))
# XXX: registry should always exist after Jython 2.5rc1
src = join(prefix, 'registry')
if os.path.exists(src):
copyfile(src, join(home_dir, 'registry'), symlink=False)
copyfile(join(prefix, 'cachedir'), join(home_dir, 'cachedir'),
symlink=False)
mkdir(bin_dir)
py_executable = join(bin_dir, os.path.basename(sys.executable))
if 'Python.framework' in prefix:
if re.search(r'/Python(?:-32|-64)*$', py_executable):
# The name of the python executable is not quite what
# we want, rename it.
py_executable = os.path.join(
os.path.dirname(py_executable), 'python')
logger.notify('New %s executable in %s', expected_exe, py_executable)
if sys.executable != py_executable:
## FIXME: could I just hard link?
executable = sys.executable
if sys.platform == 'cygwin' and os.path.exists(executable + '.exe'):
# Cygwin misreports sys.executable sometimes
executable += '.exe'
py_executable += '.exe'
logger.info('Executable actually exists in %s' % executable)
shutil.copyfile(executable, py_executable)
make_exe(py_executable)
if sys.platform == 'win32' or sys.platform == 'cygwin':
pythonw = os.path.join(os.path.dirname(sys.executable), 'pythonw.exe')
if os.path.exists(pythonw):
logger.info('Also created pythonw.exe')
shutil.copyfile(pythonw, os.path.join(os.path.dirname(py_executable), 'pythonw.exe'))
if os.path.splitext(os.path.basename(py_executable))[0] != expected_exe:
secondary_exe = os.path.join(os.path.dirname(py_executable),
expected_exe)
py_executable_ext = os.path.splitext(py_executable)[1]
if py_executable_ext == '.exe':
# python2.4 gives an extension of '.4' :P
secondary_exe += py_executable_ext
if os.path.exists(secondary_exe):
logger.warn('Not overwriting existing %s script %s (you must use %s)'
% (expected_exe, secondary_exe, py_executable))
else:
logger.notify('Also creating executable in %s' % secondary_exe)
shutil.copyfile(sys.executable, secondary_exe)
make_exe(secondary_exe)
if 'Python.framework' in prefix:
logger.debug('MacOSX Python framework detected')
# Make sure we use the the embedded interpreter inside
# the framework, even if sys.executable points to
# the stub executable in ${sys.prefix}/bin
# See http://groups.google.com/group/python-virtualenv/
# browse_thread/thread/17cab2f85da75951
shutil.copy(
os.path.join(
prefix, 'Resources/Python.app/Contents/MacOS/%s' % os.path.basename(sys.executable)),
py_executable)
# Copy the framework's dylib into the virtual
# environment
virtual_lib = os.path.join(home_dir, '.Python')
if os.path.exists(virtual_lib):
os.unlink(virtual_lib)
copyfile(
os.path.join(prefix, 'Python'),
virtual_lib)
# And then change the install_name of the copied python executable
try:
call_subprocess(
["install_name_tool", "-change",
os.path.join(prefix, 'Python'),
'@executable_path/../.Python',
py_executable])
except:
logger.fatal(
"Could not call install_name_tool -- you must have Apple's development tools installed")
raise
# Some tools depend on pythonX.Y being present
py_executable_version = '%s.%s' % (
sys.version_info[0], sys.version_info[1])
if not py_executable.endswith(py_executable_version):
# symlinking pythonX.Y > python
pth = py_executable + '%s.%s' % (
sys.version_info[0], sys.version_info[1])
if os.path.exists(pth):
os.unlink(pth)
os.symlink('python', pth)
else:
# reverse symlinking python -> pythonX.Y (with --python)
pth = join(bin_dir, 'python')
if os.path.exists(pth):
os.unlink(pth)
os.symlink(os.path.basename(py_executable), pth)
if sys.platform == 'win32' and ' ' in py_executable:
# There's a bug with subprocess on Windows when using a first
# argument that has a space in it. Instead we have to quote
# the value:
py_executable = '"%s"' % py_executable
cmd = [py_executable, '-c', 'import sys; print sys.prefix']
logger.info('Testing executable with %s %s "%s"' % tuple(cmd))
proc = subprocess.Popen(cmd,
stdout=subprocess.PIPE)
proc_stdout, proc_stderr = proc.communicate()
proc_stdout = os.path.normcase(os.path.abspath(proc_stdout.strip()))
if proc_stdout != os.path.normcase(os.path.abspath(home_dir)):
logger.fatal(
'ERROR: The executable %s is not functioning' % py_executable)
logger.fatal(
'ERROR: It thinks sys.prefix is %r (should be %r)'
% (proc_stdout, os.path.normcase(os.path.abspath(home_dir))))
logger.fatal(
'ERROR: virtualenv is not compatible with this system or executable')
if sys.platform == 'win32':
logger.fatal(
'Note: some Windows users have reported this error when they installed Python for "Only this user". The problem may be resolvable if you install Python "For all users". (See https://bugs.launchpad.net/virtualenv/+bug/352844)')
sys.exit(100)
else:
logger.info('Got sys.prefix result: %r' % proc_stdout)
pydistutils = os.path.expanduser('~/.pydistutils.cfg')
if os.path.exists(pydistutils):
logger.notify('Please make sure you remove any previous custom paths from '
'your %s file.' % pydistutils)
## FIXME: really this should be calculated earlier
return py_executable
def install_activate(home_dir, bin_dir):
if sys.platform == 'win32' or is_jython and os._name == 'nt':
files = {'activate.bat': ACTIVATE_BAT,
'deactivate.bat': DEACTIVATE_BAT}
if os.environ.get('OS') == 'Windows_NT' and os.environ.get('OSTYPE') == 'cygwin':
files['activate'] = ACTIVATE_SH
else:
files = {'activate': ACTIVATE_SH}
files['activate_this.py'] = ACTIVATE_THIS
for name, content in files.items():
content = content.replace('__VIRTUAL_ENV__', os.path.abspath(home_dir))
content = content.replace('__VIRTUAL_NAME__', os.path.basename(os.path.abspath(home_dir)))
content = content.replace('__BIN_NAME__', os.path.basename(bin_dir))
writefile(os.path.join(bin_dir, name), content)
def install_distutils(lib_dir, home_dir):
distutils_path = os.path.join(lib_dir, 'distutils')
mkdir(distutils_path)
## FIXME: maybe this prefix setting should only be put in place if
## there's a local distutils.cfg with a prefix setting?
home_dir = os.path.abspath(home_dir)
## FIXME: this is breaking things, removing for now:
#distutils_cfg = DISTUTILS_CFG + "\n[install]\nprefix=%s\n" % home_dir
writefile(os.path.join(distutils_path, '__init__.py'), DISTUTILS_INIT)
writefile(os.path.join(distutils_path, 'distutils.cfg'), DISTUTILS_CFG, overwrite=False)
def fix_lib64(lib_dir):
"""
Some platforms (particularly Gentoo on x64) put things in lib64/pythonX.Y
instead of lib/pythonX.Y. If this is such a platform we'll just create a
symlink so lib64 points to lib
"""
if [p for p in distutils.sysconfig.get_config_vars().values()
if isinstance(p, basestring) and 'lib64' in p]:
logger.debug('This system uses lib64; symlinking lib64 to lib')
assert os.path.basename(lib_dir) == 'python%s' % sys.version[:3], (
"Unexpected python lib dir: %r" % lib_dir)
lib_parent = os.path.dirname(lib_dir)
assert os.path.basename(lib_parent) == 'lib', (
"Unexpected parent dir: %r" % lib_parent)
copyfile(lib_parent, os.path.join(os.path.dirname(lib_parent), 'lib64'))
def resolve_interpreter(exe):
"""
If the executable given isn't an absolute path, search $PATH for the interpreter
"""
if os.path.abspath(exe) != exe:
paths = os.environ.get('PATH', '').split(os.pathsep)
for path in paths:
if os.path.exists(os.path.join(path, exe)):
exe = os.path.join(path, exe)
break
if not os.path.exists(exe):
logger.fatal('The executable %s (from --python=%s) does not exist' % (exe, exe))
sys.exit(3)
return exe
############################################################
## Relocating the environment:
def make_environment_relocatable(home_dir):
"""
Makes the already-existing environment use relative paths, and takes out
the #!-based environment selection in scripts.
"""
activate_this = os.path.join(home_dir, 'bin', 'activate_this.py')
if not os.path.exists(activate_this):
logger.fatal(
'The environment doesn\'t have a file %s -- please re-run virtualenv '
'on this environment to update it' % activate_this)
fixup_scripts(home_dir)
fixup_pth_and_egg_link(home_dir)
## FIXME: need to fix up distutils.cfg
OK_ABS_SCRIPTS = ['python', 'python%s' % sys.version[:3],
'activate', 'activate.bat', 'activate_this.py']
def fixup_scripts(home_dir):
# This is what we expect at the top of scripts:
shebang = '#!%s/bin/python' % os.path.normcase(os.path.abspath(home_dir))
# This is what we'll put:
new_shebang = '#!/usr/bin/env python%s' % sys.version[:3]
activate = "import os; activate_this=os.path.join(os.path.dirname(__file__), 'activate_this.py'); execfile(activate_this, dict(__file__=activate_this)); del os, activate_this"
bin_dir = os.path.join(home_dir, 'bin')
for filename in os.listdir(bin_dir):
filename = os.path.join(bin_dir, filename)
if not os.path.isfile(filename):
# ignore subdirs, e.g. .svn ones.
continue
f = open(filename, 'rb')
lines = f.readlines()
f.close()
if not lines:
logger.warn('Script %s is an empty file' % filename)
continue
if not lines[0].strip().startswith(shebang):
if os.path.basename(filename) in OK_ABS_SCRIPTS:
logger.debug('Cannot make script %s relative' % filename)
elif lines[0].strip() == new_shebang:
logger.info('Script %s has already been made relative' % filename)
else:
logger.warn('Script %s cannot be made relative (it\'s not a normal script that starts with %s)'
% (filename, shebang))
continue
logger.notify('Making script %s relative' % filename)
lines = [new_shebang+'\n', activate+'\n'] + lines[1:]
f = open(filename, 'wb')
f.writelines(lines)
f.close()
def fixup_pth_and_egg_link(home_dir, sys_path=None):
"""Makes .pth and .egg-link files use relative paths"""
home_dir = os.path.normcase(os.path.abspath(home_dir))
if sys_path is None:
sys_path = sys.path
for path in sys_path:
if not path:
path = '.'
if not os.path.isdir(path):
continue
path = os.path.normcase(os.path.abspath(path))
if not path.startswith(home_dir):
logger.debug('Skipping system (non-environment) directory %s' % path)
continue
for filename in os.listdir(path):
filename = os.path.join(path, filename)
if filename.endswith('.pth'):
if not os.access(filename, os.W_OK):
logger.warn('Cannot write .pth file %s, skipping' % filename)
else:
fixup_pth_file(filename)
if filename.endswith('.egg-link'):
if not os.access(filename, os.W_OK):
logger.warn('Cannot write .egg-link file %s, skipping' % filename)
else:
fixup_egg_link(filename)
def fixup_pth_file(filename):
lines = []
prev_lines = []
f = open(filename)
prev_lines = f.readlines()