added unsafe toggle to vars_prompt (#49219)

* added unsafe toggle to vars_prompt

	fixes #47534

changelogs/fragments/unsafe_prompt.yml

@@ -0,0 +1,2 @@
+minor_changes:
+    - added 'unsafe' keyword to vars_prompt so users can signal 'template unsafe' content

docs/docsite/rst/user_guide/playbooks_prompts.rst

@@ -89,6 +89,16 @@ Depending on your platform at most the following crypt schemes are supported:
 - *sha256_crypt* - SHA-256 Crypt
 - *sha512_crypt* - SHA-512 Crypt
 
+.. versionadded:: 2.8
+
+If you need to put in special characters (i.e `{%`) that might create templating errors, use the ``unsafe`` option::
+
+   vars_prompt:
+     - name: "my_password_with_wierd_chars"
+       prompt: "Enter password"
+       unsafe: yes
+       private: yes
+
 .. seealso::
 
    :doc:`playbooks`
@@ -101,6 +111,3 @@ Depending on your platform at most the following crypt schemes are supported:
        Have a question?  Stop by the google group!
    `irc.freenode.net <http://irc.freenode.net>`_
        #ansible IRC chat channel
-
-
-

lib/ansible/executor/playbook_executor.py

@@ -111,6 +111,7 @@ class PlaybookExecutor:
                     templar = Templar(loader=self._loader, variables=all_vars)
                     setattr(play, 'vars_prompt', templar.template(play.vars_prompt))
 
+                    # FIXME: this should be a play 'sub object' like loop_control
                     if play.vars_prompt:
                         for var in play.vars_prompt:
                             vname = var['name']
@@ -121,11 +122,13 @@ class PlaybookExecutor:
                             encrypt = var.get("encrypt", None)
                             salt_size = var.get("salt_size", None)
                             salt = var.get("salt", None)
+                            unsafe = var.get("unsafe", None)
 
                             if vname not in self._variable_manager.extra_vars:
                                 if self._tqm:
-                                    self._tqm.send_callback('v2_playbook_on_vars_prompt', vname, private, prompt, encrypt, confirm, salt_size, salt, default)
-                                    play.vars[vname] = display.do_var_prompt(vname, private, prompt, encrypt, confirm, salt_size, salt, default)
+                                    self._tqm.send_callback('v2_playbook_on_vars_prompt', vname, private, prompt, encrypt, confirm, salt_size, salt,
+                                                            default, unsafe)
+                                    play.vars[vname] = display.do_var_prompt(vname, private, prompt, encrypt, confirm, salt_size, salt, default, unsafe)
                                 else:  # we are either in --list-<option> or syntax check
                                     play.vars[vname] = default
 

lib/ansible/plugins/callback/__init__.py

@@ -303,7 +303,7 @@ class CallbackBase(AnsiblePlugin):
     def playbook_on_task_start(self, name, is_conditional):
         pass
 
-    def playbook_on_vars_prompt(self, varname, private=True, prompt=None, encrypt=None, confirm=False, salt_size=None, salt=None, default=None):
+    def playbook_on_vars_prompt(self, varname, private=True, prompt=None, encrypt=None, confirm=False, salt_size=None, salt=None, default=None, unsafe=None):
         pass
 
     def playbook_on_setup(self):
@@ -387,8 +387,8 @@ class CallbackBase(AnsiblePlugin):
     def v2_playbook_on_handler_task_start(self, task):
         pass  # no v1 correspondence
 
-    def v2_playbook_on_vars_prompt(self, varname, private=True, prompt=None, encrypt=None, confirm=False, salt_size=None, salt=None, default=None):
-        self.playbook_on_vars_prompt(varname, private, prompt, encrypt, confirm, salt_size, salt, default)
+    def v2_playbook_on_vars_prompt(self, varname, private=True, prompt=None, encrypt=None, confirm=False, salt_size=None, salt=None, default=None, unsafe=None):
+        self.playbook_on_vars_prompt(varname, private, prompt, encrypt, confirm, salt_size, salt, default, unsafe)
 
     # FIXME: not called
     def v2_playbook_on_import_for_host(self, result, imported_file):

lib/ansible/utils/display.py

@@ -39,7 +39,7 @@ from ansible.module_utils._text import to_bytes, to_text
 from ansible.module_utils.six import with_metaclass
 from ansible.utils.color import stringc
 from ansible.utils.singleton import Singleton
-
+from ansible.utils.unsafe_proxy import wrap_var
 
 try:
     # Python 2
@@ -305,7 +305,7 @@ class Display(with_metaclass(Singleton, object)):
         else:
             return input(prompt_string)
 
-    def do_var_prompt(self, varname, private=True, prompt=None, encrypt=None, confirm=False, salt_size=None, salt=None, default=None):
+    def do_var_prompt(self, varname, private=True, prompt=None, encrypt=None, confirm=False, salt_size=None, salt=None, default=None, unsafe=None):
 
         result = None
         if sys.__stdin__.isatty():
@@ -343,6 +343,9 @@ class Display(with_metaclass(Singleton, object)):
 
         # handle utf-8 chars
         result = to_text(result, errors='surrogate_or_strict')
+
+        if unsafe:
+            result = wrap_var(result)
         return result
 
     @staticmethod

test/integration/targets/vars_prompt/test-vars_prompt.py

@@ -109,6 +109,12 @@ tests = [
      'test_spec': [
          [('prompting for host:', 'testhost\r')],
          r'testhost.*ok=1']},
+
+    # Test play unsafe toggle
+    {'playbook': 'unsafe.yml',
+     'test_spec': [
+         [('prompting for variable:', '{{whole}}\r')],
+         r'testhost.*ok=2']},
 ]
 
 for t in tests:

test/integration/targets/vars_prompt/unsafe.yml

@@ -0,0 +1,20 @@
+- name: Test vars_prompt unsafe
+  hosts: testhost
+  become: no
+  gather_facts: no
+  vars:
+    whole: INVALID
+  vars_prompt:
+    - name: input
+      prompt: prompting for variable
+      unsafe: true
+
+  tasks:
+    - name:
+      assert:
+        that:
+          - input != whole
+          - input != 'INVALID'
+
+    - debug:
+        var: input