1 files changed, 63 insertions, 0 deletions
diff --git a/lib/ansible/playbook/collectionsearch.py b/lib/ansible/playbook/collectionsearch.py
new file mode 100644
index 0000000..2980093
--- /dev/null
+++ b/lib/ansible/playbook/collectionsearch.py
@@ -0,0 +1,63 @@
+# Copyright: (c) 2019, Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+from ansible.module_utils.six import string_types
+from ansible.playbook.attribute import FieldAttribute
+from ansible.utils.collection_loader import AnsibleCollectionConfig
+from ansible.template import is_template
+from ansible.utils.display import Display
+
+from jinja2.nativetypes import NativeEnvironment
+
+display = Display()
+
+
+def _ensure_default_collection(collection_list=None):
+    default_collection = AnsibleCollectionConfig.default_collection
+
+    # Will be None when used as the default
+    if collection_list is None:
+        collection_list = []
+
+    # FIXME: exclude role tasks?
+    if default_collection and default_collection not in collection_list:
+        collection_list.insert(0, default_collection)
+
+    # if there's something in the list, ensure that builtin or legacy is always there too
+    if collection_list and 'ansible.builtin' not in collection_list and 'ansible.legacy' not in collection_list:
+        collection_list.append('ansible.legacy')
+
+    return collection_list
+
+
+class CollectionSearch:
+
+    # this needs to be populated before we can resolve tasks/roles/etc
+    collections = FieldAttribute(isa='list', listof=string_types, priority=100, default=_ensure_default_collection,
+                                 always_post_validate=True, static=True)
+
+    def _load_collections(self, attr, ds):
+        # We are always a mixin with Base, so we can validate this untemplated
+        # field early on to guarantee we are dealing with a list.
+        ds = self.get_validated_value('collections', self.fattributes.get('collections'), ds, None)
+
+        # this will only be called if someone specified a value; call the shared value
+        _ensure_default_collection(collection_list=ds)
+
+        if not ds:  # don't return an empty collection list, just return None
+            return None
+
+        # This duplicates static attr checking logic from post_validate()
+        # because if the user attempts to template a collection name, it may
+        # error before it ever gets to the post_validate() warning (e.g. trying
+        # to import a role from the collection).
+        env = NativeEnvironment()
+        for collection_name in ds:
+            if is_template(collection_name, env):
+                display.warning('"collections" is not templatable, but we found: %s, '
+                                'it will not be templated and will be used "as is".' % (collection_name))
+
+        return ds