# Note this playbook is in the zuul/ dir because it is very test specific
# currently. We could potentially rewrite things so that this can be used
# in production but it isn't currently ready for that.
#
# In particular it bootstraps users and test changes assuming a test env.

- name: Ensure initial gerrit state without starting Gerrit
  import_playbook: ../service-review.yaml
  vars:
    gerrit_container_image: docker.io/opendevorg/gerrit:3.7
    gerrit_run_init: false
    gerrit_run_reindex: false
    gerrit_run_compose_up: false

- hosts: "review:!disabled"
  name: "Record pre Gerrit deployment configuration state"
  tasks:
    # This allows us to check that our config file isn't modified by newer
    # Gerrit versions.
    - name: Backup config files pre deploy
      block:
        - name: Find .config files
          find:
            paths: /home/gerrit2/review_site/etc
            patterns: '*.config'
          register: _config_files_pre_deploy

        - name: 'Backup config file'
          copy:
            src: '{{ item }}'
            dest: '{{ item }}.pre-deploy'
            remote_src: true
          loop: "{{ _config_files_pre_deploy.files | map(attribute='path') | list }}"

- name: Start Gerrit on the old version of Gerrit
  import_playbook: ../service-review.yaml
  vars:
    gerrit_container_image: docker.io/opendevorg/gerrit:3.7

- hosts: "review:!disabled"
  name: "Wait for gerrit to be up and running"
  tasks:
    - name: Pause for a few seconds to give gerrit time to start
      wait_for:
        timeout: 30

- name: Bootstrap gerrit to be semi useable
  # This is necessary to perform actions on the old side pre upgrade
  import_playbook: ./bootstrap-test-review.yaml

- hosts: "review:!disabled"
  name: "Prepare Gerrit for Upgrade"
  tasks:
    - name: Stop gerrit before we upgrade
      shell:
        cmd: docker-compose down
        chdir: /etc/gerrit-compose/

    # This allows us to check that our config file isn't modified by newer
    # Gerrit versions.
    - name: Backup config files pre upgrade
      block:
        - name: Find .config files
          find:
            paths: /home/gerrit2/review_site/etc
            patterns: '*.config'
          register: _config_files_pre_upgrade

        - name: 'Backup config file'
          copy:
            src: '{{ item }}'
            dest: '{{ item }}.pre-upgrade'
            remote_src: true
          loop: "{{ _config_files_pre_upgrade.files | map(attribute='path') | list }}"

    # Record h2 cache files. We will use this to highlight any new caches
    # under the new Gerrit version.
    - name: Record Gerrit old cache files
      find:
        paths: /home/gerrit2/review_site/cache
        patterns: '*.h2.db'
      register: _old_cache_files

- name: Perform gerrit upgrade
  import_playbook: ../service-review.yaml
  vars:
    gerrit_container_image: docker.io/opendevorg/gerrit:3.8
    gerrit_run_init: true
    # Gerrit 3.7 -> 3.8 upgrade does not require an offline reindex
    gerrit_run_reindex: false

- hosts: "review:!disabled"
  name: "Post upgrade config check"
  tasks:
    - name: Diff config files pre deploy to pre upgrade
      shell: |
        set -o pipefail
        diff -u {{ item }}.pre-deploy {{ item }}.pre-upgrade | tee {{ item }}.deploy.diff
      args:
        executable: /bin/bash
      loop: "{{ _config_files_pre_upgrade.files | map(attribute='path') | list }}"
      register: _diff_output_deploy

    - name: Diff config files pre upgrade to post upgrade
      shell: |
        set -o pipefail
        diff -u {{ item }}.pre-upgrade {{ item }} | tee {{ item }}.upgrade.diff
      args:
        executable: /bin/bash
      loop: "{{ _config_files_pre_upgrade.files | map(attribute='path') | list }}"
      register: _diff_output_upgrade

    - name: Check the config diffs after deployment
      fail:
        msg: 'Difference detected in file {{ item.item }} '
      when: item.rc != 0
      loop: '{{ _diff_output_deploy.results }}'

    - name: Check the config diffs after upgrade
      fail:
        msg: 'Difference detected in file {{ item.item }} '
      when: item.rc != 0
      loop: '{{ _diff_output_upgrade.results }}'

    - name: Record Gerrit new cache files
      find:
        paths: /home/gerrit2/review_site/cache
        patterns: '*.h2.db'
      register: _new_cache_files

    - name: Manipulate find data for caches
      set_fact:
        _old_cache_paths: "{{ _old_cache_files.files | map(attribute='path') | list }}"
        _new_cache_paths: "{{ _new_cache_files.files | map(attribute='path') | list }}"

    - name: Find delta between cache listings
      set_fact:
        _gerrit_cache_difference: "{{ _old_cache_paths | symmetric_difference(_new_cache_paths) }}"

    - name: Check for new cache files
      debug:
        msg: "The new Gerrit version produces new on disk caches: {{ _gerrit_cache_difference }}"
      when: _gerrit_cache_difference | length > 0