Add generic data structures querying (#13684)

* Query lookup plugin

* Add license and docstrings

* Add python3-ish imports

* Change query plugin type from lookup to filter

* Switch from dq to jsonpath_rw

* Add integration test for query filter

* Rename query filter to json_query

* Add jsonpath-rw

* Rename query filter to json_query

* Switch query implementation from jsonpath-rw to jmespath

test/integration/roles/test_filters/tasks/main.yml

@@ -40,8 +40,8 @@
   register: diff_result_9851
 
 - name: 9851 - verify generated file matches known good
-  assert:  
-    that: 
+  assert:
+    that:
         - 'diff_result_9851.stdout == ""'
 
 - name: fill in a basic template
@@ -56,9 +56,9 @@
   register: diff_result
 
 - name: verify templated file matches known good
-  assert:  
-    that: 
-        - 'diff_result.stdout == ""' 
+  assert:
+    that:
+        - 'diff_result.stdout == ""'
 
 - name: Verify human_readable
   assert:
@@ -77,3 +77,9 @@
         - "31 == ['x','y']|map('extract',{'x':42,'y':31})|list|last"
         - "'local' == ['localhost']|map('extract',hostvars,'ansible_connection')|list|first"
         - "'local' == ['localhost']|map('extract',hostvars,['ansible_connection'])|list|first"
+
+- name: Test json_query filter
+  assert:
+    that:
+      - "users | json_query('[*].hosts[].host') == ['host_a', 'host_b', 'host_c', 'host_d']"
+

test/integration/roles/test_filters/vars/main.yml

@@ -1,6 +1,18 @@
 some_structure:
   - "this is a list element"
-  - 
+  -
     this: "is a hash element in a list"
     warp: 9
     where: endor
+
+users:
+  - name: steve
+    hosts:
+      - host: host_a
+        password: abc
+      - host: host_b
+  - name: bill
+    hosts:
+      - host: host_c
+        password: default
+      - host: host_d