provider: allow yaml hook to read documents as lists

tackle/providers/yaml/hooks/yamls.py

@@ -1,4 +1,5 @@
 from ruamel.yaml import YAML
+from ruamel.yaml.composer import ComposerError
 import os
 from typing import Union
 
@@ -33,8 +34,14 @@ def exec(self) -> Union[dict, str]:
             return self.path
 
         else:
-            with open(self.path, 'r') as f:
-                data = yaml.load(f)
+            try:
+                with open(self.path, 'r') as f:
+                    data = yaml.load(f)
+            except ComposerError:
+                data = []
+                with open(self.path, 'r') as f:
+                    for doc in yaml.load_all(f):
+                        data.append(doc)
 
             # TODO: Improve this - https://github.com/robcxyz/tackle/issues/56
             import json

tackle/providers/yaml/tests/list_yaml_read.yaml

@@ -0,0 +1,2 @@
+
+y->: yaml list_yaml.yaml

tackle/providers/yaml/tests/test_provider_system_yaml.py

@@ -23,6 +23,12 @@ def test_provider_system_hook_yaml_read(change_dir, clean_outputs):
     assert read['stuff'] == 'things'
 
 
+def test_provider_system_hook_list_yaml(change_dir, clean_outputs):
+    output = tackle('list_yaml_read.yaml', no_input=True)
+
+    assert len(output['y']) > 1
+
+
 def test_provider_system_hook_yaml_write(change_dir, clean_outputs):
     tackle('write.yaml', no_input=True)
     yaml = YAML()