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ansible/library/easy_install

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, Matt Wright <matt@nobien.net>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
#
DOCUMENTATION = '''
---
module: easy_install
short_description: Installs Python libraries
description:
- Installs Python libraries, optionally in a I(virtualenv)
version_added: "0.7"
options:
name:
description:
- A Python library name
required: true
default: null
aliases: []
virtualenv:
description:
- an optional I(virtualenv) directory path to install into. If the
I(virtualenv) does not exist, it is created automatically
required: false
default: null
examples:
- code: easy_install name=pip
description: "Examples from Ansible Playbooks"
- code: easy_install name=flask virtualenv=/webapps/myapp/venv
description: "Install I(Flask) (U(http://flask.pocoo.org/)) into the specified I(virtualenv)"
notes:
- Please note that the M(easy_install) module can only install Python
libraries. Thus this module is not able to remove libraries. It is
generally recommended to use the M(pip) module which you can first install
using M(easy_install).
- Also note that I(virtualenv) must be installed on the remote host if the
C(virtualenv) parameter is specified.
requirements: [ "virtualenv" ]
author: Matt Wright
'''
def _ensure_virtualenv(env, virtualenv):
if os.path.exists(os.path.join(env, 'bin', 'activate')):
return 0, '', ''
else:
return _run('%s %s' % (virtualenv, env))
def _is_package_installed(name, easy_install):
cmd = '%s --dry-run %s' % (easy_install, name)
rc, status_stdout, status_stderr = _run(cmd)
return not ('Reading' in status_stdout or 'Downloading' in status_stdout)
def _run(cmd):
# returns (rc, stdout, stderr) from shell command
process = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.PIPE, shell=True)
stdout, stderr = process.communicate()
return (process.returncode, stdout, stderr)
def main():
arg_spec = dict(
name=dict(required=True),
virtualenv=dict(default=None, required=False)
)
module = AnsibleModule(argument_spec=arg_spec)
name = module.params['name']
env = module.params['virtualenv']
easy_install = module.get_bin_path('easy_install', True, ['%s/bin' % env])
rc = 0
err = ''
out = ''
if env:
virtualenv = module.get_bin_path('virtualenv', True)
if virtualenv is None:
module.fail_json(msg='virtualenv is not installed')
rc_venv, out_venv, err_venv = _ensure_virtualenv(env, virtualenv)
rc += rc_venv
out += out_venv
err += err_venv
cmd = None
changed = False
installed = _is_package_installed(name, easy_install)
if not installed:
cmd = '%s %s' % (easy_install, name)
rc_pip, out_pip, err_pip = _run(cmd)
rc += rc_pip
out += out_pip
err += err_pip
changed = True
if rc != 0:
module.fail_json(msg=err, cmd=cmd)
module.exit_json(changed=changed, binary=easy_install,
name=name, virtualenv=env)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()