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community.general/library/packaging/pip
Michael DeHaan 049f4a9882 Merge pull request #6701 from carlanton/pr/pip_check_fix2 
Make pip dry run work better for the common case
2014-08-08 14:53:25 -04:00

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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/>.
#
import tempfile
import os
DOCUMENTATION = '''
---
module: pip
short_description: Manages Python library dependencies.
description:
- "Manage Python library dependencies. To use this module, one of the following keys is required: C(name)
or C(requirements)."
version_added: "0.7"
options:
name:
description:
- The name of a Python library to install or the url of the remote package.
required: false
default: null
version:
description:
- The version number to install of the Python library specified in the I(name) parameter
required: false
default: null
requirements:
description:
- The path to a pip requirements file
required: false
default: null
virtualenv:
description:
- An optional path to a I(virtualenv) directory to install into
required: false
default: null
virtualenv_site_packages:
version_added: "1.0"
description:
- Whether the virtual environment will inherit packages from the
global site-packages directory. Note that if this setting is
changed on an already existing virtual environment it will not
have any effect, the environment must be deleted and newly
created.
required: false
default: "no"
choices: [ "yes", "no" ]
virtualenv_command:
version_aded: "1.1"
description:
- The command or a pathname to the command to create the virtual
environment with. For example C(pyvenv), C(virtualenv),
C(virtualenv2), C(~/bin/virtualenv), C(/usr/local/bin/virtualenv).
required: false
default: virtualenv
state:
description:
- The state of module
required: false
default: present
choices: [ "present", "absent", "latest" ]
extra_args:
description:
- Extra arguments passed to pip.
required: false
default: null
version_added: "1.0"
chdir:
description:
- cd into this directory before running the command
version_added: "1.3"
required: false
default: null
executable:
description:
- The explicit executable or a pathname to the executable to be used to
run pip for a specific version of Python installed in the system. For
example C(pip-3.3), if there are both Python 2.7 and 3.3 installations
in the system and you want to run pip for the Python 3.3 installation.
version_added: "1.3"
required: false
default: null
notes:
- Please note that virtualenv (U(http://www.virtualenv.org/)) must be installed on the remote host if the virtualenv parameter is specified.
requirements: [ "virtualenv", "pip" ]
author: Matt Wright
'''
EXAMPLES = '''
# Install (Bottle) python package.
- pip: name=bottle
# Install (Bottle) python package on version 0.11.
- pip: name=bottle version=0.11
# Install (MyApp) using one of the remote protocols (bzr+,hg+,git+,svn+). You do not have to supply '-e' option in extra_args.
- pip: name='svn+http://myrepo/svn/MyApp#egg=MyApp'
# Install (Bottle) into the specified (virtualenv), inheriting none of the globally installed modules
- pip: name=bottle virtualenv=/my_app/venv
# Install (Bottle) into the specified (virtualenv), inheriting globally installed modules
- pip: name=bottle virtualenv=/my_app/venv virtualenv_site_packages=yes
# Install (Bottle) into the specified (virtualenv), using Python 2.7
- pip: name=bottle virtualenv=/my_app/venv virtualenv_command=virtualenv-2.7
# Install specified python requirements.
- pip: requirements=/my_app/requirements.txt
# Install specified python requirements in indicated (virtualenv).
- pip: requirements=/my_app/requirements.txt virtualenv=/my_app/venv
# Install specified python requirements and custom Index URL.
- pip: requirements=/my_app/requirements.txt extra_args='-i https://example.com/pypi/simple'
# Install (Bottle) for Python 3.3 specifically,using the 'pip-3.3' executable.
- pip: name=bottle executable=pip-3.3
'''
def _get_cmd_options(module, cmd):
thiscmd = cmd + " --help"
rc, stdout, stderr = module.run_command(thiscmd)
if rc != 0:
module.fail_json(msg="Could not get output from %s: %s" % (thiscmd, stdout + stderr))
words = stdout.strip().split()
cmd_options = [ x for x in words if x.startswith('--') ]
return cmd_options
def _get_full_name(name, version=None):
if version is None:
resp = name
else:
resp = name + '==' + version
return resp
def _is_present(name, version, installed_pkgs):
for pkg in installed_pkgs:
if '==' not in pkg:
continue
[pkg_name, pkg_version] = pkg.split('==')
if pkg_name == name and (version is None or version == pkg_version):
return True
return False
def _get_pip(module, env=None, executable=None):
# On Debian and Ubuntu, pip is pip.
# On Fedora18 and up, pip is python-pip.
# On Fedora17 and below, CentOS and RedHat 6 and 5, pip is pip-python.
# On Fedora, CentOS, and RedHat, the exception is in the virtualenv.
# There, pip is just pip.
candidate_pip_basenames = ['pip', 'python-pip', 'pip-python']
pip = None
if executable is not None:
if os.path.isabs(executable):
pip = executable
else:
# If you define your own executable that executable should be the only candidate.
candidate_pip_basenames = [executable]
if pip is None:
if env is None:
opt_dirs = []
else:
# Try pip with the virtualenv directory first.
opt_dirs = ['%s/bin' % env]
for basename in candidate_pip_basenames:
pip = module.get_bin_path(basename, False, opt_dirs)
if pip is not None:
break
# pip should have been found by now. The final call to get_bin_path will
# trigger fail_json.
if pip is None:
basename = candidate_pip_basenames[0]
pip = module.get_bin_path(basename, True, opt_dirs)
return pip
def _fail(module, cmd, out, err):
msg = ''
if out:
msg += "stdout: %s" % (out, )
if err:
msg += "\n:stderr: %s" % (err, )
module.fail_json(cmd=cmd, msg=msg)
def main():
state_map = dict(
present='install',
absent='uninstall -y',
latest='install -U',
)
module = AnsibleModule(
argument_spec=dict(
state=dict(default='present', choices=state_map.keys()),
name=dict(default=None, required=False),
version=dict(default=None, required=False, type='str'),
requirements=dict(default=None, required=False),
virtualenv=dict(default=None, required=False),
virtualenv_site_packages=dict(default='no', type='bool'),
virtualenv_command=dict(default='virtualenv', required=False),
use_mirrors=dict(default='yes', type='bool'),
extra_args=dict(default=None, required=False),
chdir=dict(default=None, required=False),
executable=dict(default=None, required=False),
),
required_one_of=[['name', 'requirements']],
mutually_exclusive=[['name', 'requirements']],
supports_check_mode=True
)
state = module.params['state']
name = module.params['name']
version = module.params['version']
requirements = module.params['requirements']
extra_args = module.params['extra_args']
chdir = module.params['chdir']
if state == 'latest' and version is not None:
module.fail_json(msg='version is incompatible with state=latest')
err = ''
out = ''
env = module.params['virtualenv']
virtualenv_command = module.params['virtualenv_command']
if env:
env = os.path.expanduser(env)
virtualenv = os.path.expanduser(virtualenv_command)
if os.path.basename(virtualenv) == virtualenv:
virtualenv = module.get_bin_path(virtualenv_command, True)
if not os.path.exists(os.path.join(env, 'bin', 'activate')):
if module.check_mode:
module.exit_json(changed=True)
if module.params['virtualenv_site_packages']:
cmd = '%s --system-site-packages %s' % (virtualenv, env)
else:
cmd_opts = _get_cmd_options(module, virtualenv)
if '--no-site-packages' in cmd_opts:
cmd = '%s --no-site-packages %s' % (virtualenv, env)
else:
cmd = '%s %s' % (virtualenv, env)
this_dir = tempfile.gettempdir()
if chdir:
this_dir = os.path.join(this_dir, chdir)
rc, out_venv, err_venv = module.run_command(cmd, cwd=this_dir)
out += out_venv
err += err_venv
if rc != 0:
_fail(module, cmd, out, err)
pip = _get_pip(module, env, module.params['executable'])
cmd = '%s %s' % (pip, state_map[state])
# If there's a virtualenv we want things we install to be able to use other
# installations that exist as binaries within this virtualenv. Example: we
# install cython and then gevent -- gevent needs to use the cython binary,
# not just a python package that will be found by calling the right python.
# So if there's a virtualenv, we add that bin/ to the beginning of the PATH
# in run_command by setting path_prefix here.
path_prefix = None
if env:
path_prefix="/".join(pip.split('/')[:-1])
# Automatically apply -e option to extra_args when source is a VCS url. VCS
# includes those beginning with svn+, git+, hg+ or bzr+
if name:
if name.startswith('svn+') or name.startswith('git+') or \
name.startswith('hg+') or name.startswith('bzr+'):
args_list = [] # used if extra_args is not used at all
if extra_args:
args_list = extra_args.split(' ')
if '-e' not in args_list:
args_list.append('-e')
# Ok, we will reconstruct the option string
extra_args = ' '.join(args_list)
if extra_args:
cmd += ' %s' % extra_args
if name:
cmd += ' %s' % _get_full_name(name, version)
elif requirements:
cmd += ' -r %s' % requirements
this_dir = tempfile.gettempdir()
if chdir:
this_dir = os.path.join(this_dir, chdir)
if module.check_mode:
if env or extra_args or requirements or state == 'latest' or not name:
module.exit_json(changed=True)
elif name.startswith('svn+') or name.startswith('git+') or \
name.startswith('hg+') or name.startswith('bzr+'):
module.exit_json(changed=True)
freeze_cmd = '%s freeze' % pip
rc, out_pip, err_pip = module.run_command(freeze_cmd, cwd=this_dir)
if rc != 0:
module.exit_json(changed=True)
out += out_pip
err += err_pip
is_present = _is_present(name, version, out.split())
changed = (state == 'present' and not is_present) or (state == 'absent' and is_present)
module.exit_json(changed=changed, cmd=freeze_cmd, stdout=out, stderr=err)
rc, out_pip, err_pip = module.run_command(cmd, path_prefix=path_prefix, cwd=this_dir)
out += out_pip
err += err_pip
if rc == 1 and state == 'absent' and 'not installed' in out_pip:
pass # rc is 1 when attempting to uninstall non-installed package
elif rc != 0:
_fail(module, cmd, out, err)
if state == 'absent':
changed = 'Successfully uninstalled' in out_pip
else:
changed = 'Successfully installed' in out_pip
module.exit_json(changed=changed, cmd=cmd, name=name, version=version,
state=state, requirements=requirements, virtualenv=env, stdout=out, stderr=err)
# import module snippets
from ansible.module_utils.basic import *
main()
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