Added scripts to install virtual environment
These scripts provide methods needed for installing OpenStack development virtual environments. Change-Id: I72bbb1a81ee80a1f0520e720a5dfca6740cc8c75
This commit is contained in:
Sharat Sharma
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69
tools/install_venv.py
Executable file
69
tools/install_venv.py
Executable file
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Copyright 2010 OpenStack Foundation
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# Copyright 2013 IBM Corp.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import ConfigParser
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import os
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import sys
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import install_venv_common as install_venv
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def print_help(project, venv, root):
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help = """
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%(project)s development environment setup is complete.
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%(project)s development uses virtualenv to track and manage Python
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dependencies while in development and testing.
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To activate the %(project)s virtualenv for the extent of your current
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shell session you can run:
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$ source %(venv)s/bin/activate
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Or, if you prefer, you can run commands in the virtualenv on a case by
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case basis by running:
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$ %(root)s/tools/with_venv.sh <your command>
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"""
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print(help % dict(project=project, venv=venv, root=root))
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def main(argv):
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root = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
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if os.environ.get('tools_path'):
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root = os.environ['tools_path']
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venv = os.path.join(root, '.venv')
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if os.environ.get('venv'):
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venv = os.environ['venv']
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pip_requires = os.path.join(root, 'requirements.txt')
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test_requires = os.path.join(root, 'test-requirements.txt')
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py_version = "python%s.%s" % (sys.version_info[0], sys.version_info[1])
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setup_cfg = ConfigParser.ConfigParser()
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setup_cfg.read('setup.cfg')
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project = setup_cfg.get('metadata', 'name')
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install = install_venv.InstallVenv(
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root, venv, pip_requires, test_requires, py_version, project)
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options = install.parse_args(argv)
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install.check_python_version()
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install.check_dependencies()
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install.create_virtualenv(no_site_packages=options.no_site_packages)
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install.install_dependencies()
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install.post_process()
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print_help(project, venv, root)
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if __name__ == '__main__':
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main(sys.argv)
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211
tools/install_venv_common.py
Executable file
211
tools/install_venv_common.py
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# Copyright 2013 OpenStack Foundation
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# Copyright 2013 IBM Corp.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Provides methods needed by installation script for OpenStack development
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virtual environments.
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Since this script is used to bootstrap a virtualenv from the system's Python
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environment, it should be kept strictly compatible with Python 2.6.
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Synced in from openstack-common
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"""
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from __future__ import print_function
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import optparse
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import os
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import subprocess
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import sys
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class InstallVenv(object):
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def __init__(self, root, venv, requirements,
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test_requirements, py_version,
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project):
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self.root = root
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self.venv = venv
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self.requirements = requirements
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self.test_requirements = test_requirements
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self.py_version = py_version
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self.project = project
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def die(self, message, *args):
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print(message % args, file=sys.stderr)
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sys.exit(1)
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def check_python_version(self):
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if sys.version_info < (2, 6):
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self.die("Need Python Version >= 2.6")
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def run_command_with_code(self, cmd, redirect_output=True,
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check_exit_code=True):
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"""Runs a command in an out-of-process shell.
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Returns the output of that command. Working directory is self.root.
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"""
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if redirect_output:
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stdout = subprocess.PIPE
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else:
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stdout = None
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proc = subprocess.Popen(cmd, cwd=self.root, stdout=stdout)
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output = proc.communicate()[0]
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if check_exit_code and proc.returncode != 0:
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self.die('Command "%s" failed.\n%s', ' '.join(cmd), output)
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return (output, proc.returncode)
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def run_command(self, cmd, redirect_output=True, check_exit_code=True):
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return self.run_command_with_code(cmd, redirect_output,
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check_exit_code)[0]
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def get_distro(self):
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if (os.path.exists('/etc/fedora-release') or
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os.path.exists('/etc/redhat-release')):
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return Fedora(
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self.root, self.venv, self.requirements,
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self.test_requirements, self.py_version, self.project)
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else:
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return Distro(
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self.root, self.venv, self.requirements,
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self.test_requirements, self.py_version, self.project)
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def check_dependencies(self):
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self.get_distro().install_virtualenv()
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def create_virtualenv(self, no_site_packages=True):
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"""Creates the virtual environment and installs PIP.
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Creates the virtual environment and installs PIP only into the
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virtual environment.
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"""
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if not os.path.isdir(self.venv):
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print('Creating venv...', end=' ')
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if no_site_packages:
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self.run_command(['virtualenv', '-q', '--no-site-packages',
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self.venv])
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else:
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self.run_command(['virtualenv', '-q', self.venv])
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print('done.')
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else:
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print("venv already exists...")
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pass
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def pip_install(self, *args):
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self.run_command(['tools/with_venv.sh',
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'pip', 'install', '--upgrade'] + list(args),
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redirect_output=False)
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def install_dependencies(self):
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print('Installing dependencies with pip (this can take a while)...')
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# First things first, make sure our venv has the latest pip and
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# setuptools and pbr
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self.pip_install('pip>=1.4')
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self.pip_install('setuptools')
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self.pip_install('pbr')
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self.pip_install('-r', self.requirements)
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self.pip_install('-r', self.test_requirements)
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def post_process(self):
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self.get_distro().post_process()
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def parse_args(self, argv):
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"""Parses command-line arguments."""
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parser = optparse.OptionParser()
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parser.add_option('-n', '--no-site-packages',
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action='store_true',
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help="Do not inherit packages from global Python "
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"install")
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return parser.parse_args(argv[1:])[0]
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class Distro(InstallVenv):
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def check_cmd(self, cmd):
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return bool(self.run_command(['which', cmd],
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check_exit_code=False).strip())
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def install_virtualenv(self):
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if self.check_cmd('virtualenv'):
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return
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if self.check_cmd('easy_install'):
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print('Installing virtualenv via easy_install...', end=' ')
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if self.run_command(['easy_install', 'virtualenv']):
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print('Succeeded')
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return
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else:
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print('Failed')
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self.die('ERROR: virtualenv not found.\n\n%s development'
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' requires virtualenv, please install it using your'
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' favorite package management tool' % self.project)
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def post_process(self):
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"""Any distribution-specific post-processing gets done here.
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In particular, this is useful for applying patches to code inside
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the venv.
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"""
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pass
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class Fedora(Distro):
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"""This covers all Fedora-based distributions.
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Includes: Fedora, RHEL, CentOS, Scientific Linux
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"""
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def check_pkg(self, pkg):
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return self.run_command_with_code(['rpm', '-q', pkg],
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check_exit_code=False)[1] == 0
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def apply_patch(self, originalfile, patchfile):
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self.run_command(['patch', '-N', originalfile, patchfile],
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check_exit_code=False)
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def install_virtualenv(self):
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if self.check_cmd('virtualenv'):
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return
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if not self.check_pkg('python-virtualenv'):
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self.die("Please install 'python-virtualenv'.")
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super(Fedora, self).install_virtualenv()
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def post_process(self):
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"""Workaround for a bug in eventlet.
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This currently affects RHEL6.1, but the fix can safely be
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applied to all RHEL and Fedora distributions.
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This can be removed when the fix is applied upstream.
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Nova: https://bugs.launchpad.net/nova/+bug/884915
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Upstream: https://bitbucket.org/eventlet/eventlet/issue/89
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RHEL: https://bugzilla.redhat.com/958868
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"""
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if os.path.exists('contrib/redhat-eventlet.patch'):
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# Install "patch" program if it's not there
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if not self.check_pkg('patch'):
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self.die("Please install 'patch'.")
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# Apply the eventlet patch
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self.apply_patch(os.path.join(self.venv, 'lib', self.py_version,
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'site-packages',
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'eventlet/green/subprocess.py'),
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'contrib/redhat-eventlet.patch')
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4
tools/with_venv.sh
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4
tools/with_venv.sh
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@ -0,0 +1,4 @@
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#!/bin/bash
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TOOLS=`dirname $0`
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VENV=$TOOLS/../.venv
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source $VENV/bin/activate && $@
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