Add 'idempotent' attribute (#1022)

* Add 'idempotent' attribute.

* Mention check mode in attribute description.

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>

---------

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>

plugins/doc_fragments/attributes.py

@@ -18,6 +18,20 @@ attributes:
     description: Can run in C(check_mode) and return changed status prediction without modifying target.
   diff_mode:
     description: Will return details on what has changed (or possibly needs changing in C(check_mode)), when in diff mode.
+  idempotent:
+    description:
+      - When run twice in a row outside check mode, with the same arguments, the second invocation indicates no change.
+      - This assumes that the system controlled/queried by the module has not changed in a relevant way.
+"""
+
+    # Should be used together with the standard fragment
+    IDEMPOTENT_NOT_MODIFY_STATE = r"""
+options: {}
+attributes:
+  idempotent:
+    support: full
+    details:
+      - This action does not modify state.
 """
 
     # Should be used together with the standard fragment

plugins/modules/current_container_facts.py

@@ -23,6 +23,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.facts
   - community.docker.attributes.facts_module
+  - community.docker.attributes.idempotent_not_modify_state
 """
 
 EXAMPLES = r"""

plugins/modules/docker_compose_v2.py

@@ -33,6 +33,10 @@ attributes:
       - In check mode, pulling the image does not result in a changed result.
   diff_mode:
     support: none
+  idempotent:
+    support: partial
+    details:
+      - If O(state=restarted) or O(recreate=always) the module is not idempotent.
 
 options:
   state:

plugins/modules/docker_compose_v2_exec.py

@@ -30,6 +30,10 @@ attributes:
     support: none
   diff_mode:
     support: none
+  idempotent:
+    support: N/A
+    details:
+      - Whether the executed command is idempotent depends on the command.
 
 options:
   service:

plugins/modules/docker_compose_v2_pull.py

@@ -32,6 +32,8 @@ attributes:
         pulling would update the image or not.
   diff_mode:
     support: none
+  idempotent:
+    support: full
 
 options:
   policy:

plugins/modules/docker_compose_v2_run.py

@@ -30,6 +30,10 @@ attributes:
     support: none
   diff_mode:
     support: none
+  idempotent:
+    support: N/A
+    details:
+      - Whether the executed command is idempotent depends on the command.
 
 options:
   service:

plugins/modules/docker_config.py

@@ -15,8 +15,8 @@ short_description: Manage docker configs
 
 description:
   - Create and remove Docker configs in a Swarm environment. Similar to C(docker config create) and C(docker config rm).
-  - Adds to the metadata of new configs 'ansible_key', an encrypted hash representation of the data, which is then used in
-    future runs to test if a config has changed. If 'ansible_key' is not present, then a config will not be updated unless
+  - Adds to the metadata of new configs C(ansible_key), an encrypted hash representation of the data, which is then used in
+    future runs to test if a config has changed. If C(ansible_key) is not present, then a config will not be updated unless
     the O(force) option is set.
   - Updates to configs are performed by removing the config and creating it again.
 extends_documentation_fragment:
@@ -30,6 +30,10 @@ attributes:
     support: full
   diff_mode:
     support: none
+  idempotent:
+    support: partial
+    details:
+      - If O(force=true) the module is not idempotent.
 
 options:
   data:

plugins/modules/docker_container.py

@@ -37,6 +37,10 @@ attributes:
       - This behavior can be configured with O(pull_check_mode_behavior).
   diff_mode:
     support: full
+  idempotent:
+    support: partial
+    details:
+      - If O(recreate=true) or O(restart=true) the module is not idempotent.
 
 options:
   auto_remove:

plugins/modules/docker_container_copy_into.py

@@ -29,6 +29,10 @@ attributes:
       - Additional data will need to be transferred to compute diffs.
       - The module uses R(the MAX_FILE_SIZE_FOR_DIFF ansible-core configuration,MAX_FILE_SIZE_FOR_DIFF) to determine for how
         large files diffs should be computed.
+  idempotent:
+    support: partial
+    details:
+      - If O(force=true) the module is not idempotent.
 
 options:
   container:

plugins/modules/docker_container_exec.py

@@ -27,6 +27,10 @@ attributes:
     support: none
   diff_mode:
     support: none
+  idempotent:
+    support: N/A
+    details:
+      - Whether the executed command is idempotent depends on the command.
 
 options:
   container:

plugins/modules/docker_container_info.py

@@ -22,6 +22,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
   - community.docker.attributes.info_module
+  - community.docker.attributes.idempotent_not_modify_state
 
 options:
   name:

plugins/modules/docker_host_info.py

@@ -24,6 +24,7 @@ extends_documentation_fragment:
   - community.docker.docker.api_documentation
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
+  - community.docker.attributes.idempotent_not_modify_state
 
 attributes:
   check_mode:

plugins/modules/docker_image.py

@@ -16,6 +16,9 @@ short_description: Manage docker images
 description:
   - Build, load or pull an image, making the image available for creating containers. Also supports tagging an image, pushing
     an image, and archiving an image to a C(.tar) file.
+  - We recommend to use the individual modules M(community.docker.docker_image_build), M(community.docker.docker_image_export),
+    M(community.docker.docker_image_load), M(community.docker.docker_image_pull), M(community.docker.docker_image_push),
+    M(community.docker.docker_image_remove), and M(community.docker.docker_image_tag) instead of this module.
 notes:
   - Building images is done using Docker daemon's API. It is not possible to use BuildKit / buildx this way. Use M(community.docker.docker_image_build)
     to build images with BuildKit.
@@ -31,6 +34,11 @@ attributes:
       - When trying to pull an image, the module assumes this is always changed in check mode.
   diff_mode:
     support: none
+  idempotent:
+    support: partial
+    details:
+      - Whether the module is idempotent depends on the exact parameters, in particular of O(force_source) and O(force_tag).
+      # TODO: improve idempotent details!
 
 options:
   source:

plugins/modules/docker_image_build.py

@@ -29,6 +29,10 @@ attributes:
     support: full
   diff_mode:
     support: none
+  idempotent:
+    support: partial
+    details:
+      - If O(rebuild=always) the module is not idempotent.
 
 options:
   name:

plugins/modules/docker_image_export.py

@@ -28,6 +28,8 @@ attributes:
     support: full
   diff_mode:
     support: none
+  idempotent:
+    support: full
 
 options:
   names:

plugins/modules/docker_image_info.py

@@ -27,6 +27,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
   - community.docker.attributes.info_module
+  - community.docker.attributes.idempotent_not_modify_state
 
 options:
   name:

plugins/modules/docker_image_load.py

@@ -28,6 +28,8 @@ attributes:
     support: none
   diff_mode:
     support: none
+  idempotent:
+    support: none
 
 options:
   path:

plugins/modules/docker_image_pull.py

@@ -30,6 +30,8 @@ attributes:
       - When check mode is combined with diff mode, the pulled image's ID is always shown as V(unknown) in the diff.
   diff_mode:
     support: full
+  idempotent:
+    support: full
 
 options:
   name:

plugins/modules/docker_image_push.py

@@ -27,6 +27,8 @@ attributes:
     support: none
   diff_mode:
     support: none
+  idempotent:
+    support: full
 
 options:
   name:

plugins/modules/docker_image_remove.py

@@ -27,6 +27,8 @@ attributes:
     support: full
   diff_mode:
     support: full
+  idempotent:
+    support: full
 
 options:
   name:

plugins/modules/docker_image_tag.py

@@ -27,6 +27,8 @@ attributes:
     support: full
   diff_mode:
     support: full
+  idempotent:
+    support: full
 
 options:
   name:

plugins/modules/docker_login.py

@@ -31,6 +31,8 @@ attributes:
     support: full
   diff_mode:
     support: none
+  idempotent:
+    support: full
 
 options:
   registry_url:
@@ -280,8 +282,7 @@ class LoginManager(DockerBaseClass):
         authcfg = self.client._auth_configs.resolve_authconfig(self.registry_url)
         # If we found an existing auth config for this registry and username
         # combination, we can return it immediately unless reauth is requested.
-        if authcfg and authcfg.get('username', None) == self.username \
-                and not reauth:
+        if authcfg and authcfg.get('username') == self.username and not reauth:
             return authcfg
 
         req_data = {

plugins/modules/docker_network.py

@@ -24,6 +24,10 @@ attributes:
     support: full
   diff_mode:
     support: full
+  idempotent:
+    support: partial
+    details:
+      - If O(force=true) the module is not idempotent.
 
 options:
   name:

plugins/modules/docker_network_info.py

@@ -22,6 +22,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
   - community.docker.attributes.info_module
+  - community.docker.attributes.idempotent_not_modify_state
 
 options:
   name:

plugins/modules/docker_node.py

@@ -25,6 +25,8 @@ attributes:
     support: full
   diff_mode:
     support: none
+  idempotent:
+    support: full
 
 options:
   hostname:

plugins/modules/docker_node_info.py

@@ -23,6 +23,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
   - community.docker.attributes.info_module
+  - community.docker.attributes.idempotent_not_modify_state
 
 options:
   name:

plugins/modules/docker_plugin.py

@@ -29,6 +29,8 @@ attributes:
     support: full
   diff_mode:
     support: full
+  idempotent:
+    support: full
 
 options:
   plugin_name:

plugins/modules/docker_prune.py

@@ -26,6 +26,8 @@ attributes:
     support: none
   diff_mode:
     support: none
+  idempotent:
+    support: full
 
 options:
   containers:

plugins/modules/docker_secret.py

@@ -30,6 +30,10 @@ attributes:
     support: full
   diff_mode:
     support: none
+  idempotent:
+    support: partial
+    details:
+      - If O(force=true) the module is not idempotent.
 
 options:
   data:

plugins/modules/docker_stack.py

@@ -26,6 +26,8 @@ attributes:
     support: none
   action_group:
     version_added: 3.6.0
+  idempotent:
+    support: full
 options:
   name:
     description:

plugins/modules/docker_stack_info.py

@@ -22,6 +22,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
   - community.docker.attributes.info_module
+  - community.docker.attributes.idempotent_not_modify_state
 attributes:
   action_group:
     version_added: 3.6.0

plugins/modules/docker_stack_task_info.py

@@ -20,6 +20,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
   - community.docker.attributes.info_module
+  - community.docker.attributes.idempotent_not_modify_state
 attributes:
   action_group:
     version_added: 3.6.0

plugins/modules/docker_swarm.py

@@ -24,6 +24,8 @@ attributes:
     support: full
   diff_mode:
     support: full
+  idempotent:
+    support: full
 
 options:
   advertise_addr:

plugins/modules/docker_swarm_info.py

@@ -29,6 +29,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
   - community.docker.attributes.info_module
+  - community.docker.attributes.idempotent_not_modify_state
 
 options:
   nodes:

plugins/modules/docker_swarm_service.py

@@ -29,6 +29,8 @@ attributes:
     support: full
   diff_mode:
     support: full
+  idempotent:
+    support: full
 
 options:
   args:

plugins/modules/docker_swarm_service_info.py

@@ -23,6 +23,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
   - community.docker.attributes.info_module
+  - community.docker.attributes.idempotent_not_modify_state
 
 options:
   name:

plugins/modules/docker_volume.py

@@ -25,6 +25,10 @@ attributes:
     support: full
   diff_mode:
     support: full
+  idempotent:
+    support: partial
+    details:
+      - If O(recreate=always) the module is not idempotent.
 
 options:
   volume_name:

plugins/modules/docker_volume_info.py

@@ -19,6 +19,7 @@ extends_documentation_fragment:
   - community.docker.attributes
   - community.docker.attributes.actiongroup_docker
   - community.docker.attributes.info_module
+  - community.docker.attributes.idempotent_not_modify_state
 
 options:
   name: