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ansible/library/command

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>, and others
#
# 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 subprocess
import sys
import datetime
import traceback
import shlex
import os
def main():
# the command module is the one ansible module that does not take key=value args
# hence don't copy this one if you are looking to build others!
module = CommandModule(argument_spec=dict())
shell = module.params['shell']
chdir = module.params['chdir']
args = module.params['args']
if args.strip() == '':
module.fail_json(msg="no command given")
if chdir:
os.chdir(chdir)
if not shell:
args = shlex.split(args)
startd = datetime.datetime.now()
try:
cmd = subprocess.Popen(args, shell=shell, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
except (OSError, IOError), e:
module.fail_json(cmd=args, msg=str(e))
except:
module.fail_json(msg=traceback.format_exc())
endd = datetime.datetime.now()
delta = endd - startd
if out is None:
out = ''
if err is None:
err = ''
module.exit_json(
cmd = args,
stdout = out.strip(),
stderr = err.strip(),
rc = cmd.returncode,
start = str(startd),
end = str(endd),
delta = str(delta),
changed = True
)
# include magic from lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
# only the command module should ever need to do this
# everything else should be simple key=value
class CommandModule(AnsibleModule):
def _handle_aliases(self):
pass
def _check_invalid_arguments(self):
pass
def _load_params(self):
''' read the input and return a dictionary and the arguments string '''
args = MODULE_ARGS
items = shlex.split(args)
params = {}
params['chdir'] = None
params['shell'] = False
if args.find("#USE_SHELL") != -1:
12 years ago
args = args.replace("#USE_SHELL", "")
params['shell'] = True
check_args = shlex.split(args)
for x in check_args:
if x.startswith("creates="):
# do not run the command if the line contains creates=filename
# and the filename already exists. This allows idempotence
# of command executions.
(k,v) = x.split("=",1)
if os.path.exists(v):
self.exit_json(
cmd=args,
stdout="skipped, since %s exists" % v,
skipped=True,
changed=False,
stderr=False,
rc=0
)
args = args.replace(x,'')
elif x.startswith("chdir="):
(k,v) = x.split("=", 1)
if not (os.path.exists(v) and os.path.isdir(v)):
self.fail_json(msg="cannot change to directory '%s': path does not exist" % v)
elif v[0] != '/':
self.fail_json(msg="the path for 'chdir' argument must be fully qualified")
params['chdir'] = v
args = args.replace(x, '')
params['args'] = args
return (params, args)
main()