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Clean up variable examples to say "$x" is still fine for a reference.

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Michael DeHaan 2013-05-05 13:21:47 -04:00
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docsite/latest/rst/playbooks.rst
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@ -155,19 +155,19 @@ These variables can be used later in the playbook like this::
$varname or ${varname} or {{ varname }} $varname or ${varname} or {{ varname }}
If you ever want to do anything complex, {{ varname }} is best, as it uses the Jinja2 templating engine. It is a good idea to get If you ever want to do anything complex like uppercasing a string, {{ varname }} is best, as it uses the Jinja2 templating engine. It is a good idea to get in the habit of using this form most of the time when the output is to be a string.
in the habit of using this form.
If just referencing the value of another simple variable though, it's fine to say $x or ${x}. This is common for when a datastructure has a member that is the value of another datastructure.
To learn more about Jinja2, you can optionally see the `Jinja2 docs <http://jinja.pocoo.org/docs/>`_ - though remember that Jinja2 loops and conditionals are only for 'templates' in Ansible, in playbooks, ansible has the 'when' and 'with' keywords for conditionals and loops. To learn more about Jinja2, you can optionally see the `Jinja2 docs <http://jinja.pocoo.org/docs/>`_ - though remember that Jinja2 loops and conditionals are only for 'templates' in Ansible, in playbooks, ansible has the 'when' and 'with' keywords for conditionals and loops.
If there are discovered variables about the system, called 'facts', these variables bubble up back into the If there are discovered variables about the system, called 'facts', these variables bubble up back into the
playbook, and can be used on each system just like explicitly set variables. Ansible provides several playbook, and can be used on each system just like explicitly set variables. Ansible provides several
of these, prefixed with 'ansible', and are documented under 'setup' in the module documentation. Additionally, of these, prefixed with 'ansible', and are documented under 'setup' in the module documentation. Additionally,
facts can be gathered by ohai and facter if they are installed. Facter variables are prefixed with ``facter_`` and Ohai facts can be gathered by ohai and facter if they are installed. Facter variables are prefixed with ``facter_`` and Ohai variables are prefixed with ``ohai_``. These add extra dependencies and are only there for ease of users
variables are prefixed with ``ohai_``. porting over from those other configuration systems.
So for instance, if I wanted How about an example. If I wanted to write the hostname into the /etc/motd file, I could say::
to write the hostname into the /etc/motd file, I could say::
- name: write the motd - name: write the motd
action: template src=/srv/templates/motd.j2 dest=/etc/motd action: template src=/srv/templates/motd.j2 dest=/etc/motd
@ -176,7 +176,7 @@ And in /srv/templates/motd.j2::
You are logged into {{ facter_hostname }} You are logged into {{ facter_hostname }}
But we're getting ahead of ourselves. Let's talk about tasks. But we're getting ahead of ourselves, as that just showed a task in a playbook. Let's talk about tasks.
Tasks list Tasks list
++++++++++ ++++++++++