deb-glance/tools/install_venv.py
Monty Taylor d26f66bce5 Align to jenkins tox patterns.
Split requires in to pip-requires and test-requires.
Updated install_venv to know about test-requires.

Change-Id: I739f42c8676c40e2203cc0bc4aa9763ffac999a9
2012-02-25 17:39:00 -08:00

154 lines
4.5 KiB
Python

# 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 Glance's development virtualenv
"""
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, 'tools', 'pip-requires')
TEST_REQUIRES = os.path.join(ROOT, 'tools', 'test-requires')
def die(message, *args):
print >> sys.stderr, message % args
sys.exit(1)
def run_command(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
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
HAS_EASY_INSTALL = bool(run_command(['which', 'easy_install'],
check_exit_code=False).strip())
HAS_VIRTUALENV = bool(run_command(['which', 'virtualenv'],
check_exit_code=False).strip())
def check_dependencies():
"""Make sure virtualenv is in the path."""
if not HAS_VIRTUALENV:
print 'not found.'
# Try installing it via easy_install...
if HAS_EASY_INSTALL:
print 'Installing virtualenv via easy_install...',
if not run_command(['which', 'easy_install']):
die('ERROR: virtualenv not found.\n\n'
'Glance development requires virtualenv, please install'
' it using your favorite package management tool')
print 'done.'
print 'done.'
def create_virtualenv(venv=VENV):
"""
Creates the virtual environment and installs PIP only into the
virtual environment
"""
print 'Creating venv...',
run_command(['virtualenv', '-q', '--no-site-packages', VENV])
print 'done.'
print 'Installing pip in virtualenv...',
if not run_command(['tools/with_venv.sh', 'easy_install',
'pip>1.0']).strip():
die("Failed to install pip.")
print 'done.'
def pip_install(*args):
run_command(['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)...'
pip_install('pip')
pip_install('-r', PIP_REQUIRES)
pip_install('-r', TEST_REQUIRES)
# Tell the virtual env how to "import glance"
py_ver = _detect_python_version(venv)
pthfile = os.path.join(venv, "lib", py_ver, "site-packages", "glance.pth")
f = open(pthfile, 'w')
f.write("%s\n" % ROOT)
def _detect_python_version(venv):
lib_dir = os.path.join(venv, "lib")
for pathname in os.listdir(lib_dir):
if pathname.startswith('python'):
return pathname
raise Exception('Unable to detect Python version')
def print_help():
help = """
Glance development environment setup is complete.
Glance development uses virtualenv to track and manage Python dependencies
while in development and testing.
To activate the Glance 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:
$ tools/with_venv.sh <your command>
Also, make test will automatically use the virtualenv.
"""
print help
def main(argv):
check_dependencies()
create_virtualenv()
install_dependencies()
print_help()
if __name__ == '__main__':
main(sys.argv)