'Connection' object has no attribute '_new_stdin'

[vladislav-sharapov]

Module hashivault_write_from_file doesn't work with recent ansible-core versions (in this example ansible-core is 2.20.1 and ansible-modules-hashivault is 5.6.0).

Playbook example:

- hosts: localhost
  tasks:
    - name: write to hashivault
      hashivault_write_from_file:
        secret: secret1
        key: file-with-secret
        path: ~/file-with-secret

Failed task output:

TASK [write to hashivault] *****************************************************
[ERROR]: Task failed: 'Connection' object has no attribute '_new_stdin'
Origin: /home/user/hashivault-playbook.yml:3:7

1 - hosts: localhost
2   tasks:
3     - name: write to hashivault
        ^ column 7

fatal: [localhost]: FAILED! => {"changed": false, "msg": "Task failed: 'Connection' object has no attribute '_new_stdin'"}

I've found two mentions of _new_stdin in this repository: hashivault_write_from_file.py and hashivault_read_to_file.py. As far as I can see this pull request (ansible-collections/ansible.posix#421) is related to the problem.

[TerryHowe]

A pull request to fix the issue would be appreciated, thanks!