---
- name: validate ios_checkpoint_filename is defined
  fail:
    msg: "missing required var: ios_checkpoint_filename"
  when: ios_checkpoint_filename is undefined

- name: get current files on disk
  cli:
    command: dir
  register: ios_dir_listing

- name: remove old checkpoint file (if necessary)
  cli:
    command: "delete /force flash:/{{ ios_checkpoint_filename }}"
  when: ios_checkpoint_filename in ios_dir_listing.stdout

# copy the current running-config to the local flash disk on the target device.
# This will be used both for restoring the current config if a failure happens
# as well as performing a configuration diff once the new config has been
# loaded.
- name: create a checkpoint of the current running-config
  ios_command:
    commands:
      - command: "copy running-config flash:{{ ios_checkpoint_filename }}"
        prompt: ["\\? "]
        answer: "{{ ios_checkpoint_filename }}"