Several cleanups to many modules:

* Fix docs to specify when python2.6+ is required (due to a library
  dep).  This helps us know when it is okay to use python2.6+ syntax in
  the file.
* remove BabyJson returns.  See #1211  This commit fixes all but the
  openstack modules.
* Use if __name__ == '__main__' to only run the main part of the module
  if the module is run as a program.  This allows for the potential to
  unittest the code later.

lib/ansible/modules/cloud/amazon/ec2_ami_find.py

@@ -130,6 +130,7 @@ options:
     default: 'success'
     required: false
 requirements:
+  - "python >= 2.6"
   - boto
 
 '''

lib/ansible/modules/cloud/amazon/rds.py

@@ -241,7 +241,9 @@ options:
     default: null
     aliases: []
     version_added: 1.9
-requirements: [ "boto" ]
+requirements:
+    - "python >= 2.6"
+    - "boto"
 author: Bruce Pennypacker, Will Thames
 '''
 

lib/ansible/modules/cloud/azure/azure.py

@@ -19,7 +19,7 @@ DOCUMENTATION = '''
 module: azure
 short_description: create or terminate a virtual machine in azure
 description:
-     - Creates or terminates azure instances. When created optionally waits for it to be 'running'. This module has a dependency on python-azure >= 0.7.1
+     - Creates or terminates azure instances. When created optionally waits for it to be 'running'.
 version_added: "1.7"
 options:
   name:
@@ -111,7 +111,9 @@ options:
     default: 'present'
     aliases: []
 
-requirements: [ "azure" ]
+requirements:
+    - "python >= 2.6"
+    - "azure >= 0.7.1"
 author: John Whitbeck
 '''
 
@@ -141,7 +143,6 @@ EXAMPLES = '''
 import base64
 import datetime
 import os
-import sys
 import time
 from urlparse import urlparse
 from ansible.module_utils.facts import * # TimeoutError
@@ -196,9 +197,9 @@ try:
     from azure.servicemanagement import (ServiceManagementService, OSVirtualHardDisk, SSH, PublicKeys,
                                          PublicKey, LinuxConfigurationSet, ConfigurationSetInputEndpoints,
                                          ConfigurationSetInputEndpoint)
+    HAS_AZURE = True
 except ImportError:
-    print "failed=True msg='azure required for this module'"
-    sys.exit(1)
+    HAS_AZURE = False
 
 from distutils.version import LooseVersion
 from types import MethodType
@@ -463,6 +464,8 @@ def main():
             wait_timeout_redirects=dict(default=300)
         )
     )
+    if not HAS_AZURE:
+        module.fail_json(msg='azure python module required for this module')
     # create azure ServiceManagementService object
     subscription_id, management_cert_path = get_azure_creds(module)
 
@@ -529,5 +532,5 @@ class Wrapper(object):
 
 # import module snippets
 from ansible.module_utils.basic import *
-
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/digital_ocean/digital_ocean.py

@@ -99,7 +99,10 @@ options:
 
 notes:
   - Two environment variables can be used, DO_API_KEY and DO_API_TOKEN. They both refer to the v2 token.
-requirements: [ dopy ]
+  - Version 2 of DigitalOcean API is used.
+requirements:
+  - "python >= 2.6"
+  - dopy
 '''
 
 
@@ -161,20 +164,18 @@ EXAMPLES = '''
       image_id=fedora-19-x64
 '''
 
-import sys
 import os
 import time
+from distutils.version import LooseVersion
 
+HAS_DOPY = True
 try:
     import dopy
     from dopy.manager import DoError, DoManager
-except ImportError, e:
-    print "failed=True msg='dopy >= 0.3.2 required for this module'"
-    sys.exit(1)
-
-if dopy.__version__ < '0.3.2':
-    print "failed=True msg='dopy >= 0.3.2 required for this module'"
-    sys.exit(1)
+    if LooseVersion(dopy.__version__) < LooseVersion('0.3.2'):
+        HAS_DOPY = False
+except ImportError:
+    HAS_DOPY = False
 
 class TimeoutError(DoError):
     def __init__(self, msg, id):
@@ -420,6 +421,8 @@ def main():
             ['id', 'name'],
         ),
     )
+    if not HAS_DOPY:
+        module.fail_json(msg='dopy >= 0.3.2 required for this module')
 
     try:
         core(module)
@@ -431,4 +434,5 @@ def main():
 # import module snippets
 from ansible.module_utils.basic import *
 
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/digital_ocean/digital_ocean_domain.py

@@ -47,6 +47,10 @@ options:
 notes:
   - Two environment variables can be used, DO_CLIENT_ID and DO_API_KEY.
   - Version 1 of DigitalOcean API is used.
+
+requirements:
+  - "python >= 2.6"
+  - dopy
 '''
 
 
@@ -74,15 +78,14 @@ EXAMPLES = '''
       ip={{ test_droplet.droplet.ip_address }}
 '''
 
-import sys
 import os
 import time
 
 try:
     from dopy.manager import DoError, DoManager
+    HAS_DOPY = True
 except ImportError as e:
-    print "failed=True msg='dopy required for this module'"
-    sys.exit(1)
+    HAS_DOPY = False
 
 class TimeoutError(DoError):
     def __init__(self, msg, id):
@@ -229,6 +232,8 @@ def main():
             ['id', 'name'],
         ),
     )
+    if not HAS_DOPY:
+        module.fail_json(msg='dopy required for this module')
 
     try:
         core(module)
@@ -239,5 +244,5 @@ def main():
 
 # import module snippets
 from ansible.module_utils.basic import *
-
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/digital_ocean/digital_ocean_sshkey.py

@@ -47,6 +47,9 @@ options:
 notes:
   - Two environment variables can be used, DO_CLIENT_ID and DO_API_KEY.
   - Version 1 of DigitalOcean API is used.
+requirements:
+  - "python >= 2.6"
+  - dopy
 '''
 
 
@@ -64,15 +67,14 @@ EXAMPLES = '''
 
 '''
 
-import sys
 import os
 import time
 
 try:
     from dopy.manager import DoError, DoManager
-except ImportError as e:
-    print "failed=True msg='dopy required for this module'"
-    sys.exit(1)
+    HAS_DOPY = True
+except ImportError:
+    HAS_DOPY = False
 
 class TimeoutError(DoError):
     def __init__(self, msg, id):
@@ -165,6 +167,8 @@ def main():
             ['id', 'name'],
         ),
     )
+    if not HAS_DOPY:
+        module.fail_json(msg='dopy required for this module')
 
     try:
         core(module)
@@ -175,5 +179,5 @@ def main():
 
 # import module snippets
 from ansible.module_utils.basic import *
-
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/docker/docker.py

@@ -261,7 +261,10 @@ options:
     version_added: "1.9"
 
 author: Cove Schneider, Joshua Conner, Pavel Antonov, Ash Wilson
-requirements: [ "docker-py >= 0.3.0", "docker >= 0.10.0" ]
+requirements:
+    - "python >= 2.6"
+    - "docker-py >= 0.3.0"
+    - "The docker server >= 0.10.0"
 '''
 
 EXAMPLES = '''
@@ -400,8 +403,7 @@ def _human_to_bytes(number):
             return int(number[:-len(each)]) * (1024 ** i)
         i = i + 1
 
-    print "failed=True msg='Could not convert %s to integer'" % (number)
-    sys.exit(1)
+    raise ValueError('Could not convert %s to integer' % (number,))
 
 
 def _ansible_facts(container_list):
@@ -912,7 +914,11 @@ class DockerManager(object):
 
             # MEM_LIMIT
 
+            try:
                 expected_mem = _human_to_bytes(self.module.params.get('memory_limit'))
+            except ValueError as e:
+                self.module.fail_json(msg=str(e))
+
             actual_mem = container['Config']['Memory']
 
             if expected_mem and actual_mem != expected_mem:
@@ -1205,11 +1211,16 @@ class DockerManager(object):
             self.module.fail_json(msg="Failed to pull the specified image: %s" % resource, error=repr(e))
 
     def create_containers(self, count=1):
+        try:
+            mem_limit = _human_to_bytes(self.module.params.get('memory_limit'))
+        except ValueError as e:
+            self.module.fail_json(msg=str(e))
+
         params = {'image':        self.module.params.get('image'),
                   'command':      self.module.params.get('command'),
                   'ports':        self.exposed_ports,
                   'volumes':      self.volumes,
-                  'mem_limit':    _human_to_bytes(self.module.params.get('memory_limit')),
+                  'mem_limit':    mem_limit,
                   'environment':  self.env,
                   'hostname':     self.module.params.get('hostname'),
                   'domainname':   self.module.params.get('domainname'),

lib/ansible/modules/cloud/docker/docker_image.py

@@ -72,7 +72,10 @@ options:
     required: false
     default: 600
     aliases: []
-requirements: [ "docker-py" ]
+requirements:
+    - "python >= 2.6"
+    - "docker-py"
+    - "requests"
 '''
 
 EXAMPLES = '''
@@ -102,17 +105,27 @@ Remove image from local docker storage:
 
 '''
 
-try:
-    import sys
 import re
-    import json
-    import docker.client
-    from requests.exceptions import *
 from urlparse import urlparse
-except ImportError, e:
-    print "failed=True msg='failed to import python module: %s'" % e
-    sys.exit(1)
 
+try:
+    import json
+except ImportError:
+    import simplejson as json
+
+try:
+    from requests.exceptions import *
+    HAS_REQUESTS = True
+except ImportError:
+    HAS_REQUESTS = False
+
+try:
+    import docker.client
+    HAS_DOCKER_CLIENT = True
+except ImportError:
+    HAS_DOCKER_CLIENT = False
+
+if HAS_DOCKER_CLIENT:
     try:
         from docker.errors import APIError as DockerAPIError
     except ImportError:
@@ -209,6 +222,10 @@ def main():
             timeout         = dict(default=600, type='int'),
         )
     )
+    if not HAS_DOCKER_CLIENT:
+        module.fail_json(msg='docker-py is needed for this module')
+    if not HAS_REQUESTS:
+        module.fail_json(msg='requests is needed for this module')
 
     try:
         manager = DockerImageManager(module)
@@ -248,5 +265,5 @@ def main():
 
 # import module snippets
 from ansible.module_utils.basic import *
-
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/google/gc_storage.py

@@ -87,7 +87,9 @@ options:
     required: true
     default: null
 
-requirements: [ "boto 2.9+" ]
+requirements:
+    - "python >= 2.6"
+    - "boto >= 2.9"
 
 author: benno@ansible.com Note. Most of the code has been taken from the S3 module.
 
@@ -116,16 +118,15 @@ EXAMPLES = '''
 - gc_storage: bucket=mybucket mode=delete
 '''
 
-import sys
 import os
 import urlparse
 import hashlib
 
 try:
     import boto
+    HAS_BOTO = True
 except ImportError:
-    print "failed=True msg='boto 2.9+ required for this module'"
-    sys.exit(1)
+    HAS_BOTO = False
 
 def grant_check(module, gs, obj):
     try:
@@ -377,6 +378,9 @@ def main():
         ),
     )
 
+    if not HAS_BOTO:
+        module.fail_json(msg='boto 2.9+ required for this module')
+
     bucket        = module.params.get('bucket')
     obj           = module.params.get('object')
     src           = module.params.get('src')
@@ -445,5 +449,5 @@ def main():
 
 # import module snippets
 from ansible.module_utils.basic import *
-
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/google/gce.py

@@ -137,7 +137,9 @@ options:
     default: "true"
     aliases: []
 
-requirements: [ "libcloud" ]
+requirements:
+    - "python >= 2.6"
+    - "apache-libcloud >= 0.13.3"
 notes:
   - Either I(name) or I(instance_names) is required.
 author: Eric Johnson <erjohnso@google.com>
@@ -202,25 +204,21 @@ EXAMPLES = '''
 
 '''
 
-import sys
-
 try:
     from libcloud.compute.types import Provider
     from libcloud.compute.providers import get_driver
     from libcloud.common.google import GoogleBaseError, QuotaExceededError, \
             ResourceExistsError, ResourceInUseError, ResourceNotFoundError
     _ = Provider.GCE
+    HAS_LIBCLOUD = True
 except ImportError:
-    print("failed=True " + \
-        "msg='libcloud with GCE support (0.13.3+) required for this module'")
-    sys.exit(1)
+    HAS_LIBCLOUD = False
 
 try:
     from ast import literal_eval
+    HAS_PYTHON26 = True
 except ImportError:
-    print("failed=True " + \
-        "msg='GCE module requires python's 'ast' module, python v2.6+'")
-    sys.exit(1)
+    HAS_PYTHON26 = False
 
 
 def get_instance_info(inst):
@@ -323,11 +321,9 @@ def create_instances(module, gce, instance_names):
             if not isinstance(md, dict):
                 raise ValueError('metadata must be a dict')
         except ValueError, e:
-            print("failed=True msg='bad metadata: %s'" % str(e))
-            sys.exit(1)
+            module.fail_json(msg='bad metadata: %s' % str(e))
         except SyntaxError, e:
-            print("failed=True msg='bad metadata syntax'")
-            sys.exit(1)
+            module.fail_json(msg='bad metadata syntax')
 
         items = []
         for k,v in md.items():
@@ -450,6 +446,11 @@ def main():
         )
     )
 
+    if not HAS_PYTHON26:
+        module.fail_json(msg="GCE module requires python's 'ast' module, python v2.6+")
+    if not HAS_LIBCLOUD:
+        module.fail_json(msg='libcloud with GCE support (0.13.3+) required for this module')
+
     gce = gce_connect(module)
 
     image = module.params.get('image')
@@ -503,11 +504,10 @@ def main():
 
 
     json_output['changed'] = changed
-    print json.dumps(json_output)
-    sys.exit(0)
+    module.exit_json(**json_output)
 
 # import module snippets
 from ansible.module_utils.basic import *
 from ansible.module_utils.gce import *
-
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/google/gce_lb.py

@@ -131,7 +131,9 @@ options:
     default: null
     aliases: []
 
-requirements: [ "libcloud" ]
+requirements:
+    - "python >= 2.6"
+    - "apache-libcloud >= 0.13.3"
 author: Eric Johnson <erjohnso@google.com>
 '''
 
@@ -147,9 +149,6 @@ EXAMPLES = '''
     httphealthcheck_path: "/up"
 '''
 
-import sys
-
-
 try:
     from libcloud.compute.types import Provider
     from libcloud.compute.providers import get_driver
@@ -158,10 +157,9 @@ try:
     from libcloud.common.google import GoogleBaseError, QuotaExceededError, \
             ResourceExistsError, ResourceNotFoundError
     _ = Provider.GCE
+    HAS_LIBCLOUD = True
 except ImportError:
-    print("failed=True " + \
-            "msg='libcloud with GCE support required for this module.'")
-    sys.exit(1)
+    HAS_LIBCLOUD = False
 
 
 def main():
@@ -188,6 +186,9 @@ def main():
         )
     )
 
+    if not HAS_LIBCLOUD:
+        module.fail_json(msg='libcloud with GCE support (0.13.3+) required for this module.')
+
     gce = gce_connect(module)
 
     httphealthcheck_name = module.params.get('httphealthcheck_name')
@@ -325,11 +326,11 @@ def main():
 
 
     json_output['changed'] = changed
-    print json.dumps(json_output)
-    sys.exit(0)
+    module.exit_json(**json_output)
 
 # import module snippets
 from ansible.module_utils.basic import *
 from ansible.module_utils.gce import *
 
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/google/gce_net.py

@@ -102,7 +102,9 @@ options:
     default: null
     aliases: []
 
-requirements: [ "libcloud" ]
+requirements:
+    - "python >= 2.6"
+    - "apache-libcloud >= 0.13.3"
 author: Eric Johnson <erjohnso@google.com>
 '''
 
@@ -123,18 +125,15 @@ EXAMPLES = '''
 
 '''
 
-import sys
-
 try:
     from libcloud.compute.types import Provider
     from libcloud.compute.providers import get_driver
     from libcloud.common.google import GoogleBaseError, QuotaExceededError, \
             ResourceExistsError, ResourceNotFoundError
     _ = Provider.GCE
+    HAS_LIBCLOUD = True
 except ImportError:
-    print("failed=True " + \
-            "msg='libcloud with GCE support required for this module.'")
-    sys.exit(1)
+    HAS_LIBCLOUD = False
 
 def format_allowed_section(allowed):
     """Format each section of the allowed list"""
@@ -182,6 +181,9 @@ def main():
         )
     )
 
+    if not HAS_LIBCLOUD:
+        module.exit_json(msg='libcloud with GCE support (0.13.3+) required for this module')
+
     gce = gce_connect(module)
 
     allowed = module.params.get('allowed')
@@ -281,11 +283,11 @@ def main():
                 changed = True
 
     json_output['changed'] = changed
-    print json.dumps(json_output)
-    sys.exit(0)
+    module.exit_json(**json_output)
 
 # import module snippets
 from ansible.module_utils.basic import *
 from ansible.module_utils.gce import *
 
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/google/gce_pd.py

@@ -117,7 +117,9 @@ options:
     choices: ["pd-standard", "pd-ssd"]
     aliases: []
 
-requirements: [ "libcloud" ]
+requirements:
+    - "python >= 2.6"
+    - "apache-libcloud >= 0.13.3"
 author: Eric Johnson <erjohnso@google.com>
 '''
 
@@ -130,18 +132,15 @@ EXAMPLES = '''
     name: pd
 '''
 
-import sys
-
 try:
     from libcloud.compute.types import Provider
     from libcloud.compute.providers import get_driver
     from libcloud.common.google import GoogleBaseError, QuotaExceededError, \
             ResourceExistsError, ResourceNotFoundError, ResourceInUseError
     _ = Provider.GCE
+    HAS_LIBCLOUD = True
 except ImportError:
-    print("failed=True " + \
-        "msg='libcloud with GCE support is required for this module.'")
-    sys.exit(1)
+    HAS_LIBCLOUD = False
 
 
 def main():
@@ -162,6 +161,8 @@ def main():
             project_id = dict(),
         )
     )
+    if not HAS_LIBCLOUD:
+        module.fail_json(msg='libcloud with GCE support (0.13.3+) is required for this module')
 
     gce = gce_connect(module)
 
@@ -285,11 +286,11 @@ def main():
             changed = True
 
     json_output['changed'] = changed
-    print json.dumps(json_output)
-    sys.exit(0)
+    module.exit_json(**json_output)
 
 # import module snippets
 from ansible.module_utils.basic import *
 from ansible.module_utils.gce import *
 
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/linode/linode.py

@@ -88,7 +88,10 @@ options:
     description:
      - how long before wait gives up, in seconds
     default: 300
-requirements: [ "linode-python", "pycurl" ]
+requirements:
+    - "python >= 2.6"
+    - "linode-python"
+    - "pycurl"
 author: Vincent Viallet
 notes:
   - LINODE_API_KEY env variable can be used instead
@@ -151,22 +154,21 @@ EXAMPLES = '''
      state: restarted
 '''
 
-import sys
 import time
 import os
 
 try:
     import pycurl
+    HAS_PYCURL = True
 except ImportError:
-    print("failed=True msg='pycurl required for this module'")
-    sys.exit(1)
+    HAS_PYCURL = False
 
 
 try:
     from linode import api as linode_api
+    HAS_LINODE = True
 except ImportError:
-    print("failed=True msg='linode-python required for this module'")
-    sys.exit(1)
+    HAS_LINODE = False
 
 
 def randompass():
@@ -456,6 +458,11 @@ def main():
         )
     )
 
+    if not HAS_PYCURL:
+        module.fail_json(msg='pycurl required for this module')
+    if not HAS_LINODE:
+        module.fail_json(msg='linode-python required for this module')
+
     state = module.params.get('state')
     api_key = module.params.get('api_key')
     name = module.params.get('name')
@@ -490,4 +497,5 @@ def main():
 # import module snippets
 from ansible.module_utils.basic import *
 
+if __name__ == '__main__':
     main()

lib/ansible/modules/cloud/vmware/vsphere_guest.py

@@ -120,7 +120,9 @@ notes:
   - This module should run from a system that can access vSphere directly.
     Either by using local_action, or using delegate_to.
 author: Richard Hoop <wrhoop@gmail.com>
-requirements: [ pysphere ]
+requirements:
+  - "python >= 2.6"
+  - pysphere
 '''
 
 
@@ -1320,4 +1322,5 @@ def main():
 
 # this is magic, see lib/ansible/module_common.py
 #<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+if __name__ == '__main__':
     main()

lib/ansible/modules/system/selinux.py

@@ -60,9 +60,9 @@ import sys
 
 try:
     import selinux
+    HAS_SELINUX = True
 except ImportError:
-    print "failed=True msg='libselinux-python required for this module'"
-    sys.exit(1)
+    HAS_SELINUX = False
 
 # getter subroutines
 def get_config_state(configfile):
@@ -130,6 +130,9 @@ def main():
         supports_check_mode=True
     )
 
+    if not HAS_SELINUX:
+        module.fail_json(msg='libselinux-python required for this module')
+
     # global vars
     changed=False
     msgs                  = []
@@ -204,5 +207,6 @@ def main():
 # import module snippets
 from ansible.module_utils.basic import *
 
+if __name__ == '__main__':
     main()
 

lib/ansible/modules/utilities/helper/accelerate.py

@@ -63,7 +63,9 @@ options:
     version_added: "1.6"
 notes:
     - See the advanced playbooks chapter for more about using accelerated mode.
-requirements: [ "python-keyczar" ]
+requirements:
+    - "python >= 2.6"
+    - "python-keyczar"
 author: James Cammarata
 '''