Lookups: use Ansible's config manager whenever possible (#5440)

* Start using Ansible's config manager to handle options.

* Docs improvements.

* Fix documentation, make options actual lookup options.

* The cyberarkpassword lookup does too strange things.

* The onepassword lookups are converted in #4728, let's not interfere.

* Improve docs.

* Skip shelvefile as well.

* Convert lmdb_kv.

* Convert and fix credstash.

* Convert manifold.

* Drop chef_databag.

* Convert dig.

* Update examples.

* Forgot the most important part.

* Fix lmdb_kv docs.

* Python 2.6 compatibility.

* Convert AnsibleUnicode to str.

* Load lookup with lookup loader.

* Fix environment handling and error message checking.

* Improve docs formatting.

plugins/lookup/hiera.py

@@ -14,23 +14,23 @@ DOCUMENTATION = '''
     requirements:
       - hiera (command line utility)
     description:
-        - Retrieves data from an Puppetmaster node using Hiera as ENC
+        - Retrieves data from an Puppetmaster node using Hiera as ENC.
     options:
-      _hiera_key:
+      _terms:
             description:
-                - The list of keys to lookup on the Puppetmaster
+                - The list of keys to lookup on the Puppetmaster.
             type: list
             elements: string
             required: true
-      _bin_file:
+      executable:
             description:
-                - Binary file to execute Hiera
+                - Binary file to execute Hiera.
             default: '/usr/bin/hiera'
             env:
                 - name: ANSIBLE_HIERA_BIN
-      _hierarchy_file:
+      config_file:
             description:
-                - File that describes the hierarchy of Hiera
+                - File that describes the hierarchy of Hiera.
             default: '/etc/hiera.yaml'
             env:
                 - name: ANSIBLE_HIERA_CFG
@@ -67,25 +67,28 @@ from ansible.plugins.lookup import LookupBase
 from ansible.utils.cmd_functions import run_cmd
 from ansible.module_utils.common.text.converters import to_text
 
-ANSIBLE_HIERA_CFG = os.getenv('ANSIBLE_HIERA_CFG', '/etc/hiera.yaml')
-ANSIBLE_HIERA_BIN = os.getenv('ANSIBLE_HIERA_BIN', '/usr/bin/hiera')
-
 
 class Hiera(object):
+    def __init__(self, hiera_cfg, hiera_bin):
+        self.hiera_cfg = hiera_cfg
+        self.hiera_bin = hiera_bin
+
     def get(self, hiera_key):
-        pargs = [ANSIBLE_HIERA_BIN]
-        pargs.extend(['-c', ANSIBLE_HIERA_CFG])
+        pargs = [self.hiera_bin]
+        pargs.extend(['-c', self.hiera_cfg])
 
         pargs.extend(hiera_key)
 
         rc, output, err = run_cmd("{0} -c {1} {2}".format(
-            ANSIBLE_HIERA_BIN, ANSIBLE_HIERA_CFG, hiera_key[0]))
+            self.hiera_bin, self.hiera_cfg, hiera_key[0]))
 
         return to_text(output.strip())
 
 
 class LookupModule(LookupBase):
-    def run(self, terms, variables=''):
-        hiera = Hiera()
+    def run(self, terms, variables=None, **kwargs):
+        self.set_options(var_options=variables, direct=kwargs)
+
+        hiera = Hiera(self.get_option('config_file'), self.get_option('executable'))
         ret = [hiera.get(terms)]
         return ret