Refactor ironic authentication into a new module_utils module

This change merely moves the code to one location. The next logical
step would be to make IronicModule inherit the common ansible module.

Change-Id: Iec0ca1e33de6ebc36d7664941eafe1d77203d8f2

plugins/module_utils/ironic.py

@@ -0,0 +1,68 @@
+# This code is part of Ansible, but is an independent component.
+# This particular file snippet, and this file snippet only, is BSD licensed.
+# Modules you write using this snippet, which is embedded dynamically by Ansible
+# still belong to the author of the module, and may assign their own license
+# to the complete work.
+#
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+#    * Redistributions of source code must retain the above copyright
+#      notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above copyright notice,
+#      this list of conditions and the following disclaimer in the documentation
+#      and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible_collections.openstack.cloud.plugins.module_utils.openstack import openstack_full_argument_spec
+
+
+def ironic_argument_spec(**kwargs):
+    spec = dict(
+        auth_type=dict(required=False),
+        ironic_url=dict(required=False),
+    )
+    spec.update(kwargs)
+    return openstack_full_argument_spec(**spec)
+
+
+# TODO(dtantsur): inherit the collection's base module
+class IronicModule(AnsibleModule):
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self._update_ironic_auth()
+
+    def _update_ironic_auth(self):
+        """Validate and update authentication parameters for ironic."""
+        if (
+            self.params['auth_type'] in [None, 'None', 'none']
+            and self.params['ironic_url'] is None
+            and not self.params['cloud']
+            and not (self.params['auth']
+                     and self.params['auth'].get('endpoint'))
+        ):
+            self.fail_json(msg=("Authentication appears to be disabled, "
+                                "Please define either ironic_url, or cloud, "
+                                "or auth.endpoint"))
+
+        if (
+            self.params['ironic_url']
+            and self.params['auth_type'] in [None, 'None', 'none']
+            and not (self.params['auth']
+                     and self.params['auth'].get('endpoint'))
+        ):
+            self.params['auth'] = dict(
+                endpoint=self.params['ironic_url']
+            )