Modify line with lineinfile only if file exist

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Is there a way to make change in file but only if file exist ?
For the moment the task stop with errors.

Example : the following task

  • name: “Paramétrages de suhosin pour php”
    lineinfile:
    dest=/etc/php5/apache2/conf.d/suhosin.ini
    backup=yes
    state=present
    regexp=^{{ item.key }}
    line=“{{ item.key }} {{ item.value }}”
    insertafter=EOF
    with_items:
  • { key: ‘suhosin.post.max_vars’, value: ‘5000’ }
  • { key: ‘suhosin.request.max_vars’, value: ‘5000’ }
  • { key: ‘suhosin.perdir’, value: ‘pr’ }
    notify:
  • restart apache

will fail if /etc/php5/apache2/conf.d/suhosin.ini don’t exist ie if php5-suhosin package is not installed

failed: [127.0.0.1] => (item={‘value’: ‘5000’, ‘key’: ‘suhosin.post.max_vars’}) => {“failed”: true, “item”: {“key”: “suhosin.post.max_vars”, “value”: “5000”}, “rc”: 257}
msg: Destination /etc/php5/apache2/conf.d/suhosin.ini does not exist !
failed: [127.0.0.1] => (item={‘value’: ‘5000’, ‘key’: ‘suhosin.request.max_vars’}) => {“failed”: true, “item”: {“key”: “suhosin.request.max_vars”, “value”: “5000”}, “rc”: 257}
msg: Destination /etc/php5/apache2/conf.d/suhosin.ini does not exist !
failed: [127.0.0.1] => (item={‘value’: ‘pr’, ‘key’: ‘suhosin.perdir’}) => {“failed”: true, “item”: {“key”: “suhosin.perdir”, “value”: “pr”}, “rc”: 257}
msg: Destination /etc/php5/apache2/conf.d/suhosin.ini does not exist !

I’me about to use a pretask like this :

  • name: See if suhosin file exist

shell: “[ -f ~/.oh-my-zsh ] && echo ‘Found’ || echo ‘’”

register: suhosin_installed

Is there an another way ?