Add optional virtual environment configuration scripts to easy running

lwr.

Author: jmchilton

setup_venv.sh

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+#!/bin/bash
+
+project_directory="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd $project_directory
+if [ ! -e .venv ]
+then
+ # If virtualenv is not already installed, install it locally
+ command -v virtualenv >/dev/null 2>&1 || { . tools/install_virtualenv.sh; }
+ 
+ # Install venv
+    python tools/install_venv.py
+fi
+

tools/install_venv.py

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+# File copied OpenStack Horzion project.
+# https://github.com/openstack/horizon
+
+# Copyright 2012 United States Government as represented by the
+# Administrator of the National Aeronautics and Space Administration.
+# All Rights Reserved.
+#
+# Copyright 2012 OpenStack, LLC
+#
+# Copyright 2012 Nebula, Inc.
+#
+#    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.
+
+import os
+import subprocess
+import sys
+
+
+ROOT = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
+VENV = os.path.join(ROOT, '.venv')
+WITH_VENV = os.path.join(ROOT, 'tools', 'with_venv.sh')
+PIP_REQUIRES = os.path.join(ROOT, 'tools', 'pip-requires')
+
+def die(message, *args):
+ print >> sys.stderr, message % args
+ sys.exit(1)
+
+
+def run_command(cmd, redirect_output=True, check_exit_code=True, cwd=ROOT,
+ die_message=None):
+ """
+    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=cwd, stdout=stdout)
+ output = proc.communicate()[0]
+ if check_exit_code and proc.returncode != 0:
+ if die_message is None:
+ die('Command "%s" failed.\n%s', ' '.join(cmd), output)
+ else:
+ die(die_message)
+ 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."""
+
+ print 'Checking dependencies...'
+ if not HAS_VIRTUALENV:
+ print 'Virtual environment not found.'
+ # Try installing it via easy_install...
+ if HAS_EASY_INSTALL:
+ print 'Installing virtualenv via easy_install...',
+ run_command(['easy_install', 'virtualenv'],
+ die_message='easy_install failed to install virtualenv'
+ '\ndevelopment requires virtualenv, please'
+ ' install it using your favorite tool')
+ if not run_command(['which', 'virtualenv']):
+ die('ERROR: virtualenv not found in path.\n\ndevelopment '
+ ' requires virtualenv, please install it using your'
+ ' favorite package management tool and ensure'
+ ' virtualenv is in your path')
+ print 'virtualenv installation done.'
+ else:
+ die('easy_install not found.\n\nInstall easy_install'
+ ' (python-setuptools in ubuntu) or virtualenv by hand,'
+ ' then rerun.')
+ print 'dependency check 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([WITH_VENV, 'easy_install', 'pip']).strip():
+ die("Failed to install pip.")
+ print 'done.'
+ print 'Installing distribute in virtualenv...'
+ pip_install('distribute>=0.6.24')
+ print 'done.'
+
+
+def pip_install(*args):
+ args = [WITH_VENV, 'pip', 'install', '--upgrade'] + list(args)
+ run_command(args, redirect_output=False)
+
+
+def install_dependencies(venv=VENV):
+ print "Installing dependencies..."
+ print "(This may take several minutes, don't panic)"
+ pip_install('-r', PIP_REQUIRES)
+
+def print_summary():
+ summary = """
+galaxy-vm-launcher environment setup is complete.
+
+To activate the virtualenv for the extent of your current shell session you
+can run:
+
+$ source .venv/bin/activate
+"""
+ print summary
+
+
+def main():
+ check_dependencies()
+ create_virtualenv()
+ install_dependencies()
+ print_summary()
+
+if __name__ == '__main__':
+ main()

tools/install_virtualenv.sh

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+#!/bin/bash
+export LOCAL_PYTHON=$HOME/.gvl_python
+export PYTHON_VERSION=${PYTHON_VERSION:-`python -c "import sys; rev = sys.version_info; str = '%d.%d' % (rev[0], rev[1]); print str"`}
+mkdir -p $LOCAL_PYTHON/lib/python$PYTHON_VERSION/site-packages 
+export PYTHONPATH=$LOCAL_PYTHON/lib/python$PYTHON_VERSION/site-packages:$PYTHONPATH
+export PATH=$LOCAL_PYTHON/bin:$PATH
+easy_install --prefix=$LOCAL_PYTHON pip virtualenv

tools/pip-requires

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+paste
+wsgiutils
+PasteScript
+PasteDeploy
+simplejson
+webob
+pyOpenSSL

tools/with_venv.sh

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+#!/bin/bash
+TOOLS=`dirname $0`
+VENV=$TOOLS/../.venv
+source $VENV/bin/activate && $@