95 lines
2.5 KiB
Python
95 lines
2.5 KiB
Python
"""
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Installation script for Nova's development virtualenv
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"""
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import os
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import subprocess
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import sys
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ROOT = os.path.dirname(os.path.dirname(__file__))
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VENV = os.path.join(ROOT, '.nova-venv')
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PIP_REQUIRES = os.path.join(ROOT, 'tools', 'pip-requires')
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TWISTED_NOVA='http://nova.openstack.org/Twisted-10.0.0Nova.tar.gz'
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def die(message, *args):
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print >>sys.stderr, message % args
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sys.exit(1)
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def run_command(cmd, redirect_output=True, error_ok=False):
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# Useful for debugging:
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#print >>sys.stderr, ' '.join(cmd)
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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, stdout=stdout)
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output = proc.communicate()[0]
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if not error_ok and proc.returncode != 0:
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die('Command "%s" failed.\n%s', ' '.join(cmd), output)
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return output
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def check_dependencies():
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"""Make sure pip and virtualenv are on the path."""
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print 'Checking for pip...',
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if not run_command(['which', 'pip']).strip():
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die('ERROR: pip not found.\n\nNova development requires pip,'
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' please install it using your favorite package management tool')
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print 'done.'
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print 'Checking for virtualenv...',
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if not run_command(['which', 'virtualenv']).strip():
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die('ERROR: virtualenv not found.\n\nNova development requires virtualenv,'
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' please install it using your favorite package management tool')
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print 'done.'
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def create_virtualenv(venv=VENV):
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print 'Creating venv...',
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run_command(['virtualenv', '-q', '--no-site-packages', VENV])
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print 'done.'
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def install_dependencies(venv=VENV):
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print 'Installing dependencies with pip (this can take a while)...'
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run_command(['pip', 'install', '-E', venv, '-r', PIP_REQUIRES],
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redirect_output=False)
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run_command(['pip', 'install', '-E', venv, TWISTED_NOVA],
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redirect_output=False)
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def print_help():
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help = """
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Nova development environment setup is complete.
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Nova development uses virtualenv to track and manage Python dependencies
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while in development and testing.
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To activate the Nova virtualenv for the extent of your current shell session
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you can run:
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$ source tools/activate_venv.sh
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Or, if you prefer, you can run commands in the virtualenv on a case by case
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basis by running:
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$ tools/with_venv.sh <your command>
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Also, make test will automatically use the virtualenv.
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"""
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print help
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def main(argv):
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check_dependencies()
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create_virtualenv()
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install_dependencies()
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print_help()
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if __name__ == '__main__':
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main(sys.argv)
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