Revert "Remove deprecated functionality. (#363)"

This reverts commit 209aeb5.

plugins/doc_fragments/docker.py

@@ -27,7 +27,9 @@ class ModuleDocFragment(object):
             - When verifying the authenticity of the Docker Host server, provide the expected name of the server.
             - If the value is not specified in the task, the value of environment variable C(DOCKER_TLS_HOSTNAME) will
               be used instead. If the environment variable is not set, the default value will be used.
-            - Note that this option had a default value C(localhost) in older versions. It was removed in community.docker 3.0.0.
+            - The current default value is C(localhost). This default is deprecated and will change in community.docker
+              2.0.0 to be a value computed from I(docker_host). Explicitly specify C(localhost) to make sure this value
+              will still be used, and to disable the deprecation message which will be shown otherwise.
         type: str
     api_version:
         description:

plugins/module_utils/common.py

@@ -323,7 +323,10 @@ def auth_params(self):
             use_ssh_client=self._get_value('use_ssh_client', params['use_ssh_client'], None, False),
         )
 
-        update_tls_hostname(result)
+        def depr(*args, **kwargs):
+            self.deprecate(*args, **kwargs)
+
+        update_tls_hostname(result, old_behavior=True, deprecate_function=depr, uses_tls=is_using_tls(result))
 
         return result
 

plugins/module_utils/util.py

@@ -107,9 +107,22 @@ def log(self, msg, pretty_print=False):
 
 def update_tls_hostname(result, old_behavior=False, deprecate_function=None, uses_tls=True):
     if result['tls_hostname'] is None:
+        if old_behavior:
+            result['tls_hostname'] = DEFAULT_TLS_HOSTNAME
+            if uses_tls and deprecate_function is not None:
+                deprecate_function(
+                    'The default value "localhost" for tls_hostname is deprecated and will be removed in community.docker 3.0.0.'
+                    ' From then on, docker_host will be used to compute tls_hostname. If you want to keep using "localhost",'
+                    ' please set that value explicitly.',
+                    version='3.0.0', collection_name='community.docker')
+            return
+
         # get default machine name from the url
         parsed_url = urlparse(result['docker_host'])
-        result['tls_hostname'] = parsed_url.netloc.rsplit(':', 1)[0]
+        if ':' in parsed_url.netloc:
+            result['tls_hostname'] = parsed_url.netloc[:parsed_url.netloc.rindex(':')]
+        else:
+            result['tls_hostname'] = parsed_url
 
 
 def compare_dict_allow_more_present(av, bv):

plugins/modules/docker_stack.py

@@ -76,6 +76,9 @@
 requirements:
   - jsondiff
   - pyyaml
+
+notes:
+  - Return values I(out) and I(err) have been deprecated and will be removed in community.docker 3.0.0. Use I(stdout) and I(stderr) instead.
 '''
 
 RETURN = '''
@@ -257,6 +260,7 @@ def main():
         if rc != 0:
             module.fail_json(msg="docker stack up deploy command failed",
                              rc=rc,
+                             out=out, err=err,  # Deprecated
                              stdout=out, stderr=err)
 
         before_after_differences = json_diff(before_stack_services,
@@ -290,10 +294,12 @@ def main():
             if rc != 0:
                 module.fail_json(msg="'docker stack down' command failed",
                                  rc=rc,
+                                 out=out, err=err,  # Deprecated
                                  stdout=out, stderr=err)
             else:
                 module.exit_json(changed=True,
                                  msg=out, rc=rc,
+                                 err=err,  # Deprecated
                                  stdout=out, stderr=err)
         module.exit_json(changed=False)