Add tags filter to linode inventory plugin (#1551)

* Add tags filter to linode inventory plugin

* add tags to return tuple on line 66 in test_linode.py

* Add period in changelog fragment.
use if any() rather than for ... if list completion

* Clarify the description of the ``tags`` option

* Updated description to remove syntax error of line break.

changelogs/fragments/1549-add-tag-filter-to-linode-inventory.yml

@@ -0,0 +1,4 @@
+minor_changes:
+        - linode inventory plugin - add support for ``tags`` option to filter
+          instances by tag
+          (https://github.com/ansible-collections/community.general/issues/1549).

plugins/inventory/linode.py

@@ -35,6 +35,12 @@ DOCUMENTATION = r'''
           default: []
           type: list
           required: false
+        tags:
+          description: Populate inventory only with instances which have at least one of the tags listed here.
+          default: []
+          type: list
+          reqired: false
+          version_added: 2.0.0
         types:
           description: Populate inventory with instances with this type.
           default: []
@@ -135,7 +141,7 @@ class InventoryModule(BaseInventoryPlugin, Constructable):
         for linode_group in self.linode_groups:
             self.inventory.add_group(linode_group)
 
-    def _filter_by_config(self, regions, types):
+    def _filter_by_config(self, regions, types, tags):
         """Filter instances by user specified configuration."""
         if regions:
             self.instances = [
@@ -149,6 +155,12 @@ class InventoryModule(BaseInventoryPlugin, Constructable):
                 if instance.type.id in types
             ]
 
+        if tags:
+            self.instances = [
+                instance for instance in self.instances
+                if any(tag in instance.tags for tag in tags)
+            ]
+
     def _add_instances_to_groups(self):
         """Add instance names to their dynamic inventory groups."""
         for instance in self.instances:
@@ -193,6 +205,10 @@ class InventoryModule(BaseInventoryPlugin, Constructable):
                 'type_to_be': list,
                 'value': config_data.get('types', [])
             },
+            'tags': {
+                'type_to_be': list,
+                'value': config_data.get('tags', [])
+            },
         }
 
         for name in options:
@@ -204,8 +220,9 @@ class InventoryModule(BaseInventoryPlugin, Constructable):
 
         regions = options['regions']['value']
         types = options['types']['value']
+        tags = options['tags']['value']
 
-        return regions, types
+        return regions, types, tags
 
     def verify_file(self, path):
         """Verify the Linode configuration file."""
@@ -228,8 +245,8 @@ class InventoryModule(BaseInventoryPlugin, Constructable):
         self._get_instances_inventory()
 
         strict = self.get_option('strict')
-        regions, types = self._get_query_options(config_data)
-        self._filter_by_config(regions, types)
+        regions, types, tags = self._get_query_options(config_data)
+        self._filter_by_config(regions, types, tags)
 
         self._add_groups()
         self._add_instances_to_groups()

tests/unit/plugins/inventory/test_linode.py

@@ -58,18 +58,20 @@ def test_validation_option_bad_option(inventory):
 
 
 def test_empty_config_query_options(inventory):
-    regions, types = inventory._get_query_options({})
-    assert regions == types == []
+    regions, types, tags = inventory._get_query_options({})
+    assert regions == types == tags == []
 
 
 def test_conig_query_options(inventory):
-    regions, types = inventory._get_query_options({
+    regions, types, tags = inventory._get_query_options({
         'regions': ['eu-west', 'us-east'],
         'types': ['g5-standard-2', 'g6-standard-2'],
+        'tags': ['web-server'],
     })
 
     assert regions == ['eu-west', 'us-east']
     assert types == ['g5-standard-2', 'g6-standard-2']
+    assert tags == ['web-server']
 
 
 def test_verify_file_bad_config(inventory):