ansible/library/async_status

#!/usr/bin/python

# (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/>.
#

try:
    import json
except ImportError:
    import simplejson as json
import shlex
import os
import subprocess
import sys
import datetime
import traceback
import syslog

# ===========================================

# FIXME: better error handling

argsfile = sys.argv[1]
args = open(argsfile, 'r').read()
items = shlex.split(args)

syslog.openlog('ansible-%s' % os.path.basename(__file__))
syslog.syslog(syslog.LOG_NOTICE, 'Invoked with %s' % args)

params = {}
for x in items:
    (k, v) = x.split("=")
    params[k] = v

mode = params.get('mode', 'status')
jid  = params.get('jid', None)

# ===========================================

if jid is None:
    print json.dumps({
        "failed" : True,
        "msg"    : "jid=INTEGER is required"
    })
    sys.exit(1)


# setup logging directory
logdir = os.path.expanduser("~/.ansible_async")
log_path = os.path.join(logdir, jid)

if not os.path.exists(log_path):
    print json.dumps({
        "failed" : 1,
        "msg" : "could not find job",
        "ansible_job_id" : jid
    })
    sys.exit(1)

if mode == 'cleanup':
    os.unlink(log_path)
    print json.dumps({
        "ansible_job_id" : jid,
        "erased" : log_path
    })
    sys.exit(0)

# NOT in cleanup mode, assume regular status mode
# no remote kill mode currently exists, but probably should
# consider log_path + ".pid" file and also unlink that above

data = file(log_path).read()
try:
   data = json.loads(data)
except Exception, e:
   if data == '':
       # file not written yet?  That means it is running
       print json.dumps({
           "results_file" : log_path,
           "ansible_job_id" : jid,
           "started" : 1,
       })
   else:
       print json.dumps({
           "failed" : True,
           "ansible_job_id" : jid,
           "results_file" : log_path,
           "msg" : "Could not parse job output: %s" % data,
       })
   sys.exit(0)

if not data.has_key("started"):
   data['finished'] = 1
data['ansible_job_id'] = jid

print json.dumps(data)
sys.exit(0)