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Kirill Smelkov
cpython
Commits
ec92ec05
Commit
ec92ec05
authored
Jul 12, 2013
by
R David Murray
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Doc/library/venv.rst
Doc/library/venv.rst
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Doc/library/venv.rst
View file @
ec92ec05
...
...
@@ -187,7 +187,7 @@ An example of extending ``EnvBuilder``
--------------------------------------
The following script shows how to extend :class:`EnvBuilder` by implementing a
subclass which installs
Distribute
and pip into a created venv::
subclass which installs
setuptools
and pip into a created venv::
import os
import os.path
...
...
@@ -198,16 +198,16 @@ subclass which installs Distribute and pip into a created venv::
from urllib.request import urlretrieve
import venv
class
Distribute
EnvBuilder(venv.EnvBuilder):
class
Extended
EnvBuilder(venv.EnvBuilder):
"""
This builder installs
Distribute
and pip so that you can pip or
This builder installs
setuptools
and pip so that you can pip or
easy_install other packages into the created environment.
:param nodist: If True,
Distribute is not installed into the created
environment.
:param nodist: If True,
setuptools and pip are not installed into the
created
environment.
:param nopip: If True, pip is not installed into the created
environment.
:param progress: If
Distribute
or pip are installed, the progress of the
:param progress: If
setuptools
or pip are installed, the progress of the
installation can be monitored by passing a progress
callable. If specified, it is called with two
arguments: a string indicating some progress, and a
...
...
@@ -237,9 +237,11 @@ subclass which installs Distribute and pip into a created venv::
:param context: The information for the environment creation request
being processed.
"""
os.environ['VIRTUAL_ENV'] = context.env_dir
if not self.nodist:
self.install_distribute(context)
if not self.nopip:
self.install_setuptools(context)
# Can't install pip without setuptools
if not self.nopip and not self.nodist:
self.install_pip(context)
def reader(self, stream, context):
...
...
@@ -269,10 +271,14 @@ subclass which installs Distribute and pip into a created venv::
# Download script into the env's binaries folder
urlretrieve(url, distpath)
progress = self.progress
if self.verbose:
term = '\n'
else:
term = ''
if progress is not None:
progress('Installing %s
' %name
, 'main')
progress('Installing %s
...%s' % (name, term)
, 'main')
else:
sys.stderr.write('Installing %s
' % name
)
sys.stderr.write('Installing %s
...%s' % (name, term)
)
sys.stderr.flush()
# Install in the env
args = [context.env_exe, fn]
...
...
@@ -291,17 +297,17 @@ subclass which installs Distribute and pip into a created venv::
# Clean up - no longer needed
os.unlink(distpath)
def install_
distribute
(self, context):
def install_
setuptools
(self, context):
"""
Install
Distribute
in the environment.
Install
setuptools
in the environment.
:param context: The information for the environment creation request
being processed.
"""
url = 'http
://python-distribute.org/distribute
_setup.py'
self.install_script(context, '
distribute
', url)
# clear up the
distribute
archive which gets downloaded
pred = lambda o: o.startswith('
distribute
-') and o.endswith('.tar.gz')
url = 'http
s://bitbucket.org/pypa/setuptools/downloads/ez
_setup.py'
self.install_script(context, '
setuptools
', url)
# clear up the
setuptools
archive which gets downloaded
pred = lambda o: o.startswith('
setuptools
-') and o.endswith('.tar.gz')
files = filter(pred, os.listdir(context.bin_path))
for f in files:
f = os.path.join(context.bin_path, f)
...
...
@@ -336,10 +342,10 @@ subclass which installs Distribute and pip into a created venv::
'directories.')
parser.add_argument('dirs', metavar='ENV_DIR', nargs='+',
help='A directory to create the environment in.')
parser.add_argument('--no-
distribute
', default=False,
parser.add_argument('--no-
setuptools
', default=False,
action='store_true', dest='nodist',
help="Don't install
Distribute in the virtual
"
"environment.")
help="Don't install
setuptools or pip in the
"
"
virtual
environment.")
parser.add_argument('--no-pip', default=False,
action='store_true', dest='nopip',
help="Don't install pip in the virtual "
...
...
@@ -370,11 +376,11 @@ subclass which installs Distribute and pip into a created venv::
parser.add_argument('--verbose', default=False, action='store_true',
dest='verbose', help='Display the output '
'from the scripts which '
'install
Distribute
and pip.')
'install
setuptools
and pip.')
options = parser.parse_args(args)
if options.upgrade and options.clear:
raise ValueError('you cannot supply --upgrade and --clear together.')
builder =
Distribute
EnvBuilder(system_site_packages=options.system_site,
builder =
Extended
EnvBuilder(system_site_packages=options.system_site,
clear=options.clear,
symlinks=options.symlinks,
upgrade=options.upgrade,
...
...
@@ -393,5 +399,6 @@ subclass which installs Distribute and pip into a created venv::
print('Error: %s' % e, file=sys.stderr)
sys.exit(rc)
This script is also available for download `online
<https://gist.github.com/4673395>`_.
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