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-rw-r--r--pkg/scripts/install_venv.py247
1 files changed, 247 insertions, 0 deletions
diff --git a/pkg/scripts/install_venv.py b/pkg/scripts/install_venv.py
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+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2010 United States Government as represented by the
+# Administrator of the National Aeronautics and Space Administration.
+# All Rights Reserved.
+#
+# Copyright 2010 OpenStack, LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+"""
+Installation script for Nova's development virtualenv
+"""
+
+import optparse
+import os
+import subprocess
+import sys
+
+ROOT = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
+VENV = os.path.join(ROOT, '.venv')
+PIP_REQUIRES = os.path.join(ROOT, 'pkg', 'requirements.pip')
+TEST_REQUIRES = os.path.join(ROOT, 'pkg', 'test-requirements.pip')
+PY_VERSION = "python%s.%s" % (sys.version_info[0], sys.version_info[1])
+
+
+def die(message, *args):
+ print >> sys.stderr, message % args
+ sys.exit(1)
+
+
+def check_python_version():
+ if sys.version_info < (2, 6):
+ die("Need Python Version >= 2.6")
+
+
+def run_command_with_code(cmd, redirect_output=True, check_exit_code=True):
+ """
+ Runs a command in an out-of-process shell, returning the
+ output of that command. Working directory is ROOT.
+ """
+ if redirect_output:
+ stdout = subprocess.PIPE
+ else:
+ stdout = None
+
+ print 'executing command: %s', cmd
+ proc = subprocess.Popen(cmd, cwd=ROOT, stdout=stdout)
+ output = proc.communicate()[0]
+ if check_exit_code and proc.returncode != 0:
+ die('Command "%s" failed.\n%s', ' '.join(cmd), output)
+ return (output, proc.returncode)
+
+
+def run_command(cmd, redirect_output=True, check_exit_code=True):
+ return run_command_with_code(cmd, redirect_output, check_exit_code)[0]
+
+
+class Distro(object):
+
+ def check_cmd(self, cmd):
+ return bool(run_command(['which', cmd], check_exit_code=False).strip())
+
+ def install_virtualenv(self):
+ if self.check_cmd('virtualenv'):
+ return
+
+ if self.check_cmd('easy_install'):
+ print 'Installing virtualenv via easy_install...',
+ if run_command(['easy_install', 'virtualenv']):
+ print 'Succeeded'
+ return
+ else:
+ print 'Failed'
+
+ die('ERROR: virtualenv not found.\n\nDevelopment'
+ ' requires virtualenv, please install it using your'
+ ' favorite package management tool')
+
+ def post_process(self):
+ """Any distribution-specific post-processing gets done here.
+
+ In particular, this is useful for applying patches to code inside
+ the venv."""
+ pass
+
+
+class Debian(Distro):
+ """This covers all Debian-based distributions."""
+
+ def check_pkg(self, pkg):
+ return run_command_with_code(['dpkg', '-l', pkg],
+ check_exit_code=False)[1] == 0
+
+ def apt_install(self, pkg, **kwargs):
+ run_command(['sudo', 'apt-get', 'install', '-y', pkg], **kwargs)
+
+ def apply_patch(self, originalfile, patchfile):
+ run_command(['patch', originalfile, patchfile])
+
+ def post_process(self):
+ #symlink qt in virtualenv
+ run_command(['pkg/tools/with_venv.sh', 'pkg/postmkvenv.sh'])
+
+ def install_virtualenv(self):
+ if self.check_cmd('virtualenv'):
+ return
+
+ if not self.check_pkg('python-virtualenv'):
+ self.apt_install('python-virtualenv', check_exit_code=False)
+
+ super(Debian, self).install_virtualenv()
+
+
+class Fedora(Distro):
+ """This covers all Fedora-based distributions.
+
+ Includes: Fedora, RHEL, CentOS, Scientific Linux"""
+
+ def check_pkg(self, pkg):
+ return run_command_with_code(['rpm', '-q', pkg],
+ check_exit_code=False)[1] == 0
+
+ def yum_install(self, pkg, **kwargs):
+ run_command(['sudo', 'yum', 'install', '-y', pkg], **kwargs)
+
+ def apply_patch(self, originalfile, patchfile):
+ run_command(['patch', originalfile, patchfile])
+
+ def install_virtualenv(self):
+ if self.check_cmd('virtualenv'):
+ return
+
+ if not self.check_pkg('python-virtualenv'):
+ self.yum_install('python-virtualenv', check_exit_code=False)
+
+ super(Fedora, self).install_virtualenv()
+
+
+def get_distro():
+ if os.path.exists('/etc/fedora-release') or \
+ os.path.exists('/etc/redhat-release'):
+ return Fedora()
+ elif os.path.exists('/etc/debian_version'):
+ return Debian()
+ else:
+ return Distro()
+
+
+def check_dependencies():
+ get_distro().install_virtualenv()
+
+
+def create_virtualenv(venv=VENV, no_site_packages=True):
+ """Creates the virtual environment and installs PIP only into the
+ virtual environment
+ """
+ print 'Creating venv...',
+ if no_site_packages:
+ #setuptools and virtualenv don't play nicely together,
+ #so we create the virtualenv with the distribute package instead.
+ #See: view-source:http://pypi.python.org/pypi/distribute
+ run_command(['virtualenv', '-q', '--distribute', '--no-site-packages', VENV])
+ else:
+ run_command(['virtualenv', '-q', '--distribute', VENV])
+ print 'done.'
+ print 'Installing pip in virtualenv...',
+ if not run_command(['pkg/tools/with_venv.sh', 'easy_install',
+ 'pip>1.0']).strip():
+ die("Failed to install pip.")
+ print 'done.'
+
+
+def pip_install(*args):
+ run_command(['pkg/tools/with_venv.sh',
+ 'pip', 'install', '--upgrade'] + list(args),
+ redirect_output=False)
+
+
+def install_dependencies(venv=VENV):
+ print 'Installing dependencies with pip (this can take a while)...'
+
+ # First things first, make sure our venv has the latest pip and distribute.
+ pip_install('pip')
+ pip_install('distribute')
+
+ pip_install('-r', PIP_REQUIRES)
+ pip_install('-r', TEST_REQUIRES)
+
+ # "
+ pthfile = os.path.join(venv, "lib", PY_VERSION, "site-packages",
+ "leap-client.pth")
+ f = open(pthfile, 'w')
+ f.write("%s\n" % ROOT)
+
+
+def post_process():
+ get_distro().post_process()
+
+
+def print_help():
+ help = """
+ To activate the leap virtualenv for the extent of your current
+ shell session you can run:
+
+ $ source .venv/bin/activate
+
+ Or, if you prefer, you can run commands in the virtualenv on a case by case
+ basis by running:
+
+ $ pkg/tools/with_venv.sh <your command>
+
+ Also, make test will automatically use the virtualenv.
+ """
+ print help
+
+
+def parse_args():
+ """Parse command-line arguments"""
+ parser = optparse.OptionParser()
+ parser.add_option("-n", "--no-site-packages", dest="no_site_packages",
+ default=False, action="store_true",
+ help="Do not inherit packages from global Python install")
+ return parser.parse_args()
+
+
+def main(argv):
+ (options, args) = parse_args()
+ check_python_version()
+ check_dependencies()
+ create_virtualenv(no_site_packages=options.no_site_packages)
+ install_dependencies()
+ post_process()
+ print_help()
+
+if __name__ == '__main__':
+ main(sys.argv)