Final fix for #35666 Previous PR (#36143) was merged prematurely.

lib/ansible/plugins/shell/__init__.py

@@ -47,6 +47,20 @@ class ShellBase(AnsiblePlugin):
 
         self.tempdir = None
 
+    def _normalize_system_temps(self):
+        # Normalize the temp directory strings. We don't use expanduser/expandvars because those
+        # can vary between remote user and become user.  Therefore the safest practice will be for
+        # this to always be specified as full paths)
+        normalized_paths = [d.rstrip('/') for d in self.get_option('system_temps')]
+
+        # Make sure all system_temps are absolute otherwise they'd be relative to the login dir
+        # which is almost certainly going to fail in a cornercase.
+        if not all(os.path.isabs(d) for d in normalized_paths):
+            raise AnsibleError('The configured system_temps contains a relative path: {0}. All'
+                               ' system_temps must be absolute'.format(to_native(normalized_paths)))
+
+        self.set_option('system_temps', normalized_paths)
+
     def set_options(self, task_keys=None, var_options=None, direct=None):
 
         super(ShellBase, self).set_options(task_keys=task_keys, var_options=var_options, direct=direct)
@@ -54,18 +68,13 @@ class ShellBase(AnsiblePlugin):
         # set env
         self.env.update(self.get_option('environment'))
 
-        # Normalize the temp directory strings. We don't use expanduser/expandvars because those
-        # can vary between remote user and become user.  Therefore the safest practice will be for
-        # this to always be specified as full paths)
-        normalized_system_temps = [d.rstrip('/') for d in self.get_option('system_temps')]
-
-        # Make sure all system_temps are absolute otherwise they'd be relative to the login dir
-        # which is almost certainly going to fail in a cornercase.
-        if not all(os.path.isabs(d) for d in normalized_system_temps):
-            raise AnsibleError('The configured system_temps contains a relative path: {0}. All'
-                               ' system_temps must be absolute'.format(to_native(normalized_system_temps)))
-
-        self.set_option('system_temps', normalized_system_temps)
+        # We can remove the try: except in the future when we make ShellBase a proper subset of
+        # *all* shells.  Right now powershell and third party shells which do not use the
+        # shell_common documentation fragment (and so do not have system_temps) will fail
+        try:
+            self._normalize_system_temps()
+        except AnsibleError:
+            pass
 
     def env_prefix(self, **kwargs):
         return ' '.join(['%s=%s' % (k, shlex_quote(text_type(v))) for k, v in kwargs.items()])

lib/ansible/plugins/shell/powershell.py

@@ -1823,13 +1823,6 @@ class ShellModule(ShellBase):
 
     # TODO: add binary module support
 
-    def set_options(self, task_keys=None, var_options=None, direct=None):
-
-        super(ShellModule, self).set_options(task_keys=task_keys, var_options=var_options, direct=direct)
-
-        # set env
-        self.env.update(self.get_option('environment'))
-
     def assert_safe_env_key(self, key):
         if not self.safe_envkey.match(key):
             raise AnsibleError("Invalid PowerShell environment key: %s" % key)

lib/ansible/utils/module_docs_fragments/shell_common.py

@@ -19,7 +19,7 @@ options:
       - name: ansible_remote_tmp
   system_temps:
     description:
-       - List of valid system temporary directories for Ansible to choose when it cannot use ``remote_temp``, normally due to permission issues.
+       - List of valid system temporary directories for Ansible to choose when it cannot use ``remote_temp``, normally due to permission issues.  These must be world readable, writable, and executable.
     default: [ /var/tmp, /tmp ]
     type: list
     env: [{name: ANSIBLE_SYSTEM_TMPS}]