module_common: handle None value for templar (#36651)

* module_common: set required parameter templar

Fix the following error (related to b455901):

  $ ./hacking/test-module -m ./lib/ansible/modules/system/ping.py -I ansible_python_interpreter=/usr/bin/python
  Traceback (most recent call last):
    File "./hacking/test-module", line 268, in <module>
      main()
    File "./hacking/test-module", line 249, in main
      (modfile, modname, module_style) = boilerplate_module(options.module_path, options.module_args, interpreters, options.check, options.filename)
    File "./hacking/test-module", line 152, in boilerplate_module
      task_vars=task_vars
    File "ansible/lib/ansible/executor/module_common.py", line 910, in modify_module
      environment=environment)
    File "ansible/lib/ansible/executor/module_common.py", line 736, in _find_module_utils
      shebang, interpreter = _get_shebang(u'/usr/bin/python', task_vars, templar)
    File "ansible/lib/ansible/executor/module_common.py", line 452, in _get_shebang
      interpreter = templar.template(task_vars[interpreter_config].strip())
  AttributeError: 'NoneType' object has no attribute 'template'

* module_common.modify_module: templar is required

(cherry picked from commit 7908f78fa6)

hacking/test-module

@@ -42,6 +42,7 @@ from ansible.parsing.splitter import parse_kv
 import ansible.executor.module_common as module_common
 import ansible.constants as C
 from ansible.module_utils._text import to_native, to_text
+from ansible.template import Templar
 
 try:
     import json
@@ -149,6 +150,7 @@ def boilerplate_module(modfile, args, interpreters, check, destfile):
         modname,
         modfile,
         complex_args,
+        Templar(loader=loader),
         task_vars=task_vars
     )
 

lib/ansible/executor/module_common.py

@@ -874,7 +874,7 @@ def _find_module_utils(module_name, b_module_data, module_path, module_args, tas
     return (b_module_data, module_style, shebang)
 
 
-def modify_module(module_name, module_path, module_args, task_vars=None, templar=None, module_compression='ZIP_STORED', async_timeout=0, become=False,
+def modify_module(module_name, module_path, module_args, templar, task_vars=None, module_compression='ZIP_STORED', async_timeout=0, become=False,
                   become_method=None, become_user=None, become_password=None, become_flags=None, environment=None):
     """
     Used to insert chunks of code into modules before transfer rather than

lib/ansible/plugins/action/__init__.py

@@ -153,8 +153,8 @@ class ActionBase(with_metaclass(ABCMeta, object)):
         final_environment = dict()
         self._compute_environment_string(final_environment)
 
-        (module_data, module_style, module_shebang) = modify_module(module_name, module_path, module_args,
-                                                                    task_vars=task_vars, templar=self._templar,
+        (module_data, module_style, module_shebang) = modify_module(module_name, module_path, module_args, self._templar,
+                                                                    task_vars=task_vars,
                                                                     module_compression=self._play_context.module_compression,
                                                                     async_timeout=self._task.async_val,
                                                                     become=self._play_context.become,

test/units/executor/module_common/test_modify_module.py

@@ -28,8 +28,8 @@ def fake_old_module_open(mocker):
         mocker.patch('builtins.open', m)
 
 
-def test_shebang(fake_old_module_open):
-    (data, style, shebang) = modify_module('fake_module', 'fake_path', {})
+def test_shebang(fake_old_module_open, templar):
+    (data, style, shebang) = modify_module('fake_module', 'fake_path', {}, templar)
     assert shebang == '#!/usr/bin/python'
 
 
@@ -38,5 +38,5 @@ def test_shebang_task_vars(fake_old_module_open, templar):
         'ansible_python_interpreter': '/usr/bin/python3'
     }
 
-    (data, style, shebang) = modify_module('fake_module', 'fake_path', {}, task_vars=task_vars, templar=templar)
+    (data, style, shebang) = modify_module('fake_module', 'fake_path', {}, templar, task_vars=task_vars)
     assert shebang == '#!/usr/bin/python3'