149 lines
4.6 KiB
Python
149 lines
4.6 KiB
Python
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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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, LLC
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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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"""
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Installation script for Melange'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(os.path.realpath(__file__)))
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VENV = os.path.join(ROOT, '.venv')
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PIP_REQUIRES = os.path.join(ROOT, 'tools', 'pip-requires')
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TEST_REQUIRES = os.path.join(ROOT, 'tools', 'test-requires')
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PY_VERSION = "python%s.%s" % (sys.version_info[0], sys.version_info[1])
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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 check_python_version():
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if sys.version_info < (2, 6):
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die("Need Python Version >= 2.6")
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def run_command(cmd, redirect_output=True, check_exit_code=True):
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"""
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Runs a command in an out-of-process shell, returning the
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output of that command. Working directory is 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=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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die('Command "%s" failed.\n%s', ' '.join(cmd), output)
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return output
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HAS_EASY_INSTALL = bool(run_command(['which', 'easy_install'],
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check_exit_code=False).strip())
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HAS_VIRTUALENV = bool(run_command(['which', 'virtualenv'],
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check_exit_code=False).strip())
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def check_dependencies():
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"""Make sure virtualenv is in the path."""
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if not HAS_VIRTUALENV:
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print 'not found.'
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# Try installing it via easy_install...
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if HAS_EASY_INSTALL:
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print 'Installing virtualenv via easy_install...',
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if not (run_command(['which', 'easy_install']) and
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run_command(['easy_install', 'virtualenv'])):
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die('ERROR: virtualenv not found.\n\nMelange development'
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' requires virtualenv, please install it using your'
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' favorite package management tool')
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print 'done.'
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print 'done.'
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def create_virtualenv(venv=VENV):
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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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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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print 'Installing pip in virtualenv...',
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if not run_command(['tools/with_venv.sh', 'easy_install', 'pip']).strip():
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die("Failed to install pip.")
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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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# Install greenlet by hand - just listing it in the requires file does not
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# get it in stalled in the right order
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run_command(['tools/with_venv.sh', 'pip', 'install', '-E', venv,
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'greenlet'], redirect_output=False)
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for requires in (PIP_REQUIRES, TEST_REQUIRES):
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run_command(['tools/with_venv.sh', 'pip', 'install', '-E', venv, '-r',
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requires], redirect_output=False)
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# Tell the virtual env how to "import melange"
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pthfile = os.path.join(venv, "lib", PY_VERSION, "site-packages",
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"melange.pth")
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f = open(pthfile, 'w')
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f.write("%s\n" % ROOT)
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def print_help():
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help = """
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Melange development environment setup is complete.
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Melange 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 Melange virtualenv for the extent of your current shell
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session you can run:
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$ source .venv/bin/activate
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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_python_version()
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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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