mirror of https://github.com/python/cpython
Issue #18434: Updated example script in venv docs to use setuptools rather than Distribute.
This commit is contained in:
Vinay Sajip
parent
65171b28e7
commit
3c557f298a
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@ -187,7 +187,7 @@ An example of extending ``EnvBuilder``
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--------------------------------------
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The following script shows how to extend :class:`EnvBuilder` by implementing a
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subclass which installs Distribute and pip into a created venv::
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subclass which installs setuptools and pip into a created venv::
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import os
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import os.path
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@ -198,16 +198,16 @@ subclass which installs Distribute and pip into a created venv::
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from urllib.request import urlretrieve
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import venv
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class DistributeEnvBuilder(venv.EnvBuilder):
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class ExtendedEnvBuilder(venv.EnvBuilder):
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"""
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This builder installs Distribute and pip so that you can pip or
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This builder installs setuptools and pip so that you can pip or
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easy_install other packages into the created environment.
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:param nodist: If True, Distribute is not installed into the created
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environment.
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:param nodist: If True, setuptools and pip are not installed into the
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created environment.
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:param nopip: If True, pip is not installed into the created
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environment.
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:param progress: If Distribute or pip are installed, the progress of the
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:param progress: If setuptools or pip are installed, the progress of the
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installation can be monitored by passing a progress
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callable. If specified, it is called with two
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arguments: a string indicating some progress, and a
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@ -237,9 +237,11 @@ subclass which installs Distribute and pip into a created venv::
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:param context: The information for the environment creation request
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being processed.
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"""
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os.environ['VIRTUAL_ENV'] = context.env_dir
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if not self.nodist:
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self.install_distribute(context)
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if not self.nopip:
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self.install_setuptools(context)
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# Can't install pip without setuptools
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if not self.nopip and not self.nodist:
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self.install_pip(context)
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def reader(self, stream, context):
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@ -269,10 +271,14 @@ subclass which installs Distribute and pip into a created venv::
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# Download script into the env's binaries folder
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urlretrieve(url, distpath)
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progress = self.progress
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if progress is not None:
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progress('Installing %s' %name, 'main')
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if self.verbose:
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term = '\n'
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else:
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sys.stderr.write('Installing %s ' % name)
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term = ''
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if progress is not None:
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progress('Installing %s ...%s' % (name, term), 'main')
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else:
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sys.stderr.write('Installing %s ...%s' % (name, term))
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sys.stderr.flush()
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# Install in the env
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args = [context.env_exe, fn]
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@ -291,17 +297,17 @@ subclass which installs Distribute and pip into a created venv::
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# Clean up - no longer needed
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os.unlink(distpath)
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def install_distribute(self, context):
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def install_setuptools(self, context):
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"""
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Install Distribute in the environment.
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Install setuptools in the environment.
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:param context: The information for the environment creation request
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being processed.
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"""
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url = 'http://python-distribute.org/distribute_setup.py'
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self.install_script(context, 'distribute', url)
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# clear up the distribute archive which gets downloaded
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pred = lambda o: o.startswith('distribute-') and o.endswith('.tar.gz')
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url = 'https://bitbucket.org/pypa/setuptools/downloads/ez_setup.py'
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self.install_script(context, 'setuptools', url)
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# clear up the setuptools archive which gets downloaded
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pred = lambda o: o.startswith('setuptools-') and o.endswith('.tar.gz')
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files = filter(pred, os.listdir(context.bin_path))
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for f in files:
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f = os.path.join(context.bin_path, f)
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@ -336,10 +342,10 @@ subclass which installs Distribute and pip into a created venv::
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'directories.')
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parser.add_argument('dirs', metavar='ENV_DIR', nargs='+',
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help='A directory to create the environment in.')
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parser.add_argument('--no-distribute', default=False,
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parser.add_argument('--no-setuptools', default=False,
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action='store_true', dest='nodist',
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help="Don't install Distribute in the virtual "
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"environment.")
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help="Don't install setuptools or pip in the "
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"virtual environment.")
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parser.add_argument('--no-pip', default=False,
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action='store_true', dest='nopip',
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help="Don't install pip in the virtual "
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@ -370,11 +376,11 @@ subclass which installs Distribute and pip into a created venv::
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parser.add_argument('--verbose', default=False, action='store_true',
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dest='verbose', help='Display the output '
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'from the scripts which '
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'install Distribute and pip.')
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'install setuptools and pip.')
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options = parser.parse_args(args)
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if options.upgrade and options.clear:
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raise ValueError('you cannot supply --upgrade and --clear together.')
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builder = DistributeEnvBuilder(system_site_packages=options.system_site,
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builder = ExtendedEnvBuilder(system_site_packages=options.system_site,
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clear=options.clear,
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symlinks=options.symlinks,
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upgrade=options.upgrade,
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@ -393,5 +399,6 @@ subclass which installs Distribute and pip into a created venv::
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print('Error: %s' % e, file=sys.stderr)
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sys.exit(rc)
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This script is also available for download `online
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<https://gist.github.com/4673395>`_.
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