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#!/usr/bin/env python
# coding: utf-8
# Copyright 2014-2015 Canonical Limited.
#
# This file is part of charm-helpers.
#
# charm-helpers is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3 as
# published by the Free Software Foundation.
#
# charm-helpers is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with charm-helpers. If not, see <http://www.gnu.org/licenses/>.
import os
import subprocess
from charmhelpers.fetch import apt_install, apt_update
from charmhelpers.core.hookenv import charm_dir, log
try:
from pip import main as pip_execute
except ImportError:
apt_update()
apt_install('python-pip')
from pip import main as pip_execute
__author__ = "Jorge Niedbalski <jorge.niedbalski@canonical.com>"
def parse_options(given, available):
"""Given a set of options, check if available"""
for key, value in sorted(given.items()):
if not value:
continue
if key in available:
yield "--{0}={1}".format(key, value)
def pip_install_requirements(requirements, **options):
"""Install a requirements file """
command = ["install"]
available_options = ('proxy', 'src', 'log', )
for option in parse_options(options, available_options):
command.append(option)
command.append("-r {0}".format(requirements))
log("Installing from file: {} with options: {}".format(requirements,
command))
pip_execute(command)
def pip_install(package, fatal=False, upgrade=False, venv=None, **options):
"""Install a python package"""
if venv:
venv_python = os.path.join(venv, 'bin/pip')
command = [venv_python, "install"]
else:
command = ["install"]
available_options = ('proxy', 'src', 'log', 'index-url', )
for option in parse_options(options, available_options):
command.append(option)
if upgrade:
command.append('--upgrade')
if isinstance(package, list):
command.extend(package)
else:
command.append(package)
log("Installing {} package with options: {}".format(package,
command))
if venv:
subprocess.check_call(command)
else:
pip_execute(command)
def pip_uninstall(package, **options):
"""Uninstall a python package"""
command = ["uninstall", "-q", "-y"]
available_options = ('proxy', 'log', )
for option in parse_options(options, available_options):
command.append(option)
if isinstance(package, list):
command.extend(package)
else:
command.append(package)
log("Uninstalling {} package with options: {}".format(package,
command))
pip_execute(command)
def pip_list():
"""Returns the list of current python installed packages
"""
return pip_execute(["list"])
def pip_create_virtualenv(path=None):
"""Create an isolated Python environment."""
apt_install('python-virtualenv')
if path:
venv_path = path
else:
venv_path = os.path.join(charm_dir(), 'venv')
if not os.path.exists(venv_path):
subprocess.check_call(['virtualenv', venv_path])
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