Fix shebang. shebang and interpreter path weren't being templated (#33698)

* Fix shebang.  shebang and interpreter path weren't being templated

Fixes #18665
Fixes #33696

lib/ansible/executor/module_common.py

@@ -435,7 +435,7 @@ def _slurp(path):
     return data
 
 
-def _get_shebang(interpreter, task_vars, args=tuple()):
+def _get_shebang(interpreter, task_vars, templar, args=tuple()):
     """
     Note not stellar API:
        Returns None instead of always returning a shebang line.  Doing it this
@@ -448,7 +448,7 @@ def _get_shebang(interpreter, task_vars, args=tuple()):
     if interpreter_config not in task_vars:
         return (None, interpreter)
 
-    interpreter = task_vars[interpreter_config].strip()
+    interpreter = templar.template(task_vars[interpreter_config].strip())
     shebang = u'#!' + interpreter
 
     if args:
@@ -598,7 +598,7 @@ def _is_binary(b_module_data):
     return bool(start.translate(None, textchars))
 
 
-def _find_module_utils(module_name, b_module_data, module_path, module_args, task_vars, module_compression, async_timeout, become,
+def _find_module_utils(module_name, b_module_data, module_path, module_args, task_vars, templar, module_compression, async_timeout, become,
                        become_method, become_user, become_password, environment):
     """
     Given the source of the module, convert it to a Jinja2 template to insert
@@ -732,7 +732,7 @@ def _find_module_utils(module_name, b_module_data, module_path, module_args, tas
                                        'Look at traceback for that process for debugging information.')
         zipdata = to_text(zipdata, errors='surrogate_or_strict')
 
-        shebang, interpreter = _get_shebang(u'/usr/bin/python', task_vars)
+        shebang, interpreter = _get_shebang(u'/usr/bin/python', task_vars, templar)
         if shebang is None:
             shebang = u'#!/usr/bin/python'
 
@@ -871,7 +871,7 @@ 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, module_compression='ZIP_STORED', async_timeout=0, become=False,
+def modify_module(module_name, module_path, module_args, task_vars=None, templar=None, module_compression='ZIP_STORED', async_timeout=0, become=False,
                   become_method=None, become_user=None, become_password=None, environment=None):
     """
     Used to insert chunks of code into modules before transfer rather than
@@ -901,7 +901,7 @@ def modify_module(module_name, module_path, module_args, task_vars=None, module_
         # read in the module source
         b_module_data = f.read()
 
-    (b_module_data, module_style, shebang) = _find_module_utils(module_name, b_module_data, module_path, module_args, task_vars, module_compression,
+    (b_module_data, module_style, shebang) = _find_module_utils(module_name, b_module_data, module_path, module_args, task_vars, templar, module_compression,
                                                                 async_timeout=async_timeout, become=become, become_method=become_method,
                                                                 become_user=become_user, become_password=become_password,
                                                                 environment=environment)
@@ -916,7 +916,7 @@ def modify_module(module_name, module_path, module_args, task_vars=None, module_
             interpreter = args[0]
             interpreter = to_bytes(interpreter)
 
-            new_shebang = to_bytes(_get_shebang(interpreter, task_vars, args[1:])[0], errors='surrogate_or_strict', nonstring='passthru')
+            new_shebang = to_bytes(_get_shebang(interpreter, task_vars, templar, args[1:])[0], errors='surrogate_or_strict', nonstring='passthru')
             if new_shebang:
                 lines[0] = shebang = new_shebang
 

lib/ansible/plugins/action/__init__.py

@@ -158,9 +158,12 @@ class ActionBase(with_metaclass(ABCMeta, object)):
         self._compute_environment_string(final_environment)
 
         (module_data, module_style, module_shebang) = modify_module(module_name, module_path, module_args,
-                                                                    task_vars=task_vars, module_compression=self._play_context.module_compression,
-                                                                    async_timeout=self._task.async_val, become=self._play_context.become,
-                                                                    become_method=self._play_context.become_method, become_user=self._play_context.become_user,
+                                                                    task_vars=task_vars, templar=self._templar,
+                                                                    module_compression=self._play_context.module_compression,
+                                                                    async_timeout=self._task.async_val,
+                                                                    become=self._play_context.become,
+                                                                    become_method=self._play_context.become_method,
+                                                                    become_user=self._play_context.become_user,
                                                                     become_password=self._play_context.become_pass,
                                                                     environment=final_environment)
 

test/units/executor/module_common/test_module_common.py

@@ -93,26 +93,35 @@ class TestSlurp(object):
         assert amc._slurp('some_file') == '#!/usr/bin/python\ndef test(args):\nprint("hi")\n'
 
 
+@pytest.fixture
+def templar():
+    class FakeTemplar(object):
+        def template(self, template_string, *args, **kwargs):
+            return template_string
+
+    return FakeTemplar()
+
+
 class TestGetShebang(object):
     """Note: We may want to change the API of this function in the future.  It isn't a great API"""
-    def test_no_interpreter_set(self):
-        assert amc._get_shebang(u'/usr/bin/python', {}) == (None, u'/usr/bin/python')
+    def test_no_interpreter_set(self, templar):
+        assert amc._get_shebang(u'/usr/bin/python', {}, templar) == (None, u'/usr/bin/python')
 
-    def test_non_python_interpreter(self):
-        assert amc._get_shebang(u'/usr/bin/ruby', {}) == (None, u'/usr/bin/ruby')
+    def test_non_python_interpreter(self, templar):
+        assert amc._get_shebang(u'/usr/bin/ruby', {}, templar) == (None, u'/usr/bin/ruby')
 
-    def test_interpreter_set_in_task_vars(self):
-        assert amc._get_shebang(u'/usr/bin/python', {u'ansible_python_interpreter': u'/usr/bin/pypy'}) == \
+    def test_interpreter_set_in_task_vars(self, templar):
+        assert amc._get_shebang(u'/usr/bin/python', {u'ansible_python_interpreter': u'/usr/bin/pypy'}, templar) == \
             (u'#!/usr/bin/pypy', u'/usr/bin/pypy')
 
-    def test_non_python_interpreter_in_task_vars(self):
-        assert amc._get_shebang(u'/usr/bin/ruby', {u'ansible_ruby_interpreter': u'/usr/local/bin/ruby'}) == \
+    def test_non_python_interpreter_in_task_vars(self, templar):
+        assert amc._get_shebang(u'/usr/bin/ruby', {u'ansible_ruby_interpreter': u'/usr/local/bin/ruby'}, templar) == \
             (u'#!/usr/local/bin/ruby', u'/usr/local/bin/ruby')
 
-    def test_with_args(self):
-        assert amc._get_shebang(u'/usr/bin/python', {u'ansible_python_interpreter': u'/usr/bin/python3'}, args=('-tt', '-OO')) == \
+    def test_with_args(self, templar):
+        assert amc._get_shebang(u'/usr/bin/python', {u'ansible_python_interpreter': u'/usr/bin/python3'}, templar, args=('-tt', '-OO')) == \
             (u'#!/usr/bin/python3 -tt -OO', u'/usr/bin/python3')
 
-    def test_python_via_env(self):
-        assert amc._get_shebang(u'/usr/bin/python', {u'ansible_python_interpreter': u'/usr/bin/env python'}) == \
+    def test_python_via_env(self, templar):
+        assert amc._get_shebang(u'/usr/bin/python', {u'ansible_python_interpreter': u'/usr/bin/env python'}, templar) == \
             (u'#!/usr/bin/env python', u'/usr/bin/env python')