---
# Run disk cleanup on C.
# Requires Ansible 2.7.
- hosts: all
  tasks:
  - name: Set registry keys for automated disk cleanup
    # Based on https://github.com/deekayen/ansible-role-cleanmgr/blob/master/tasks/main.yml which is
    # in turn based on
    # https://stackoverflow.com/questions/28852786/automate-process-of-disk-cleanup-cleanmgr-exe-without-user-intervention#35214197
    win_regedit:
      path: HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\{{ item }}
      name: StateFlags0001
      type: dword
      data: 2
      state: present
    loop:
      - Active Setup Temp Folders
      - BranchCache
      - Downloaded Program Files
      - Internet Cache Files
      - Memory Dump Files
      - Old ChkDsk Files
      - Previous Installations
      - Recycle Bin
      - Service Pack Cleanup
      - Setup Log Files
      - System error memory dump files
      - System error minidump files
      - Temporary Files
      - Temporary Setup Files
      - Thumbnail Cache
      - Upgrade Discarded Files
      - User file versions
      - Windows Defender
      - Windows Error Reporting Archive Files
      - Windows Error Reporting Queue Files
      - Windows Error Reporting System Archive Files
      - Windows Error Reporting System Queue Files
      - Windows ESD installation files
      - Update Cleanup
      - Windows Upgrade Log Files
  - name: Start disk cleanup
    # "-WindowStyle Hidden" seems to be necessary for CleanMgr.exe to start from the Ansible WRM
    # connection.
    win_shell:
      Start-Process -FilePath CleanMgr.exe -ArgumentList /sagerun:1 -WindowStyle Hidden -Wait
  - name: Wait for disk cleanup to finish (This can take a very long time -- timeout is 2 hours.)
    win_wait_for_process:
      process_name_exact:
        - cleanmgr
        - dismhost
      state: absent
      timeout: 7200
  - name: Read DeepClean.log
    slurp:
      src: C:\Windows\Logs\CBS\DeepClean.log
    register: deep_clean_log
  - vars:
      deep_clean_log_contents: "{{ deep_clean_log['content'] | b64decode }}"
      deep_clean_line: " {{ deep_clean_log_contents |
        regex_search('(Total size of superseded packages.*)') }}"
    block:
      - when: deep_clean_line
        debug:
          msg: "DeepClean.log contains: {{ deep_clean_line }}"
      - when: not deep_clean_line
        fail:
          msg: "DeepClean.log does not contain expected line.\n{{ deep_clean_log_contents }}"
  - name: Reboot to finish cleanup
    # The Stack Overflow answer above seems to indicate a reboot is required to finish cleaning up
    # some files.
    win_reboot: