Fix docker_container_exec's detach=true. (#1145) (#1148) (#1151)

(cherry picked from commit 449b37e1c9)
(cherry picked from commit 488dd28339)

changelogs/fragments/1145-fix.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "docker_container_exec - make ``detach=true`` work. So far this resulted in no execution being done (https://github.com/ansible-collections/community.docker/pull/1145)."

plugins/module_utils/_api/api/client.py

@@ -581,6 +581,7 @@ class APIClient(
 
     def post_json_to_text(self, pathfmt, *args, **kwargs):
         data = kwargs.pop('data', None)
+        return self._result(self._post_json(self._url(pathfmt, *args, versioned_api=True), data, **kwargs))
 
     def post_json_to_stream_socket(self, pathfmt, *args, **kwargs):
         data = kwargs.pop('data', None)

tests/integration/targets/docker_container_exec/tasks/main.yml

@@ -180,7 +180,7 @@
       argv:
         - /bin/sh
         - '-c'
-        - sleep 1m
+        - echo "Detach worked." > /result.txt
       detach: true
     register: result
 
@@ -215,6 +215,24 @@
         - result.stderr == 'bar baz'
         - result.stderr_lines == ['bar baz']
 
+  - name: Check result of detach test
+    docker_container_exec:
+      container: "{{ cname }}"
+      argv:
+        - /bin/sh
+        - '-c'
+        - cat /result.txt
+      strip_empty_ends: false
+    register: result
+
+  - assert:
+      that:
+        - result.rc == 0
+        - result.stdout == 'Detach worked.\n'
+        - result.stdout_lines == ['Detach worked.']
+        - result.stderr == ''
+        - result.stderr_lines == []
+
   always:
   - name: Cleanup
     docker_container: