computer-playbook/roles/web-app-mediawiki/tasks/_debug_enable.yml

- name: "Render debug.php locally"
  template:
    src: "debug.php.j2"
    dest: "{{ MEDIAWIKI_CONFIG_DIR }}/debug.php"
    mode: "0644"

- name: "Compute local checksum"
  stat:
    path: "{{ MEDIAWIKI_CONFIG_DIR }}/debug.php"
    checksum_algorithm: sha256
  register: _dbg_local

- name: "Compute container checksum (if exists)"
  shell: >
    docker exec {{ MEDIAWIKI_CONTAINER }} bash -lc
    "test -f {{ MEDIAWIKI_HTML_DIR }}/debug.php &&
      sha256sum {{ MEDIAWIKI_HTML_DIR }}/debug.php | awk '{print $1}' || echo MISSING"
  args: { executable: /bin/bash }
  register: _dbg_remote
  changed_when: false

- name: "Copy debug.php into container only if different"
  shell: >
    if [ "{{ (_dbg_remote.stdout | default('') | trim) }}" != "{{ _dbg_local.stat.checksum }}" ]; then
      docker cp "{{ MEDIAWIKI_CONFIG_DIR }}/debug.php" "{{ MEDIAWIKI_CONTAINER }}:{{ MEDIAWIKI_HTML_DIR }}/debug.php" &&
      docker exec {{ MEDIAWIKI_CONTAINER }} bash -lc "chown {{ MEDIAWIKI_USER }}:{{ MEDIAWIKI_USER }} {{ MEDIAWIKI_HTML_DIR }}/debug.php && chmod 0644 {{ MEDIAWIKI_HTML_DIR }}/debug.php" &&
      echo COPIED;
    fi
  args: { executable: /bin/bash }
  register: _dbg_cp
  changed_when: "'COPIED' in (_dbg_cp.stdout | default(''))"

- name: "require_once debug.php in LocalSettings.php"
  shell: |
    docker exec -u {{ MEDIAWIKI_USER }} {{ MEDIAWIKI_CONTAINER }} bash -lc '
      LSP={{ MEDIAWIKI_HTML_DIR }}/LocalSettings.php
      LINE="require_once __DIR__ . '\''/debug.php'\'';"
      if ! grep -Fqx -- "$LINE" "$LSP"; then
        printf "%s\n" "$LINE" >> "$LSP"
        echo ADDED_DEBUG_REQUIRE
      fi
    '
  args: { executable: /bin/bash }
  register: _dbg_req
  changed_when: "'ADDED_DEBUG_REQUIRE' in (_dbg_req.stdout | default(''))"