title: Ansible-pull with no inventory limitations
body: <p>I want to have a set of git repos with base application config playbooks in them such that all I need to do with any VM, regardless of its name or role or how long its been around, to get the base config installed is to run an ansible-pull command  against this repo and I get a ready to use instance.  The problem that I run into is that if I have a playbook local.yml that's set like so:</p>
  
  <pre><code>- hosts: localhost
    connection: local
    gather_facts: yes
    user: root
  [...]
  </code></pre>
  
  <p>or like so:</p>
  
  <pre><code>- hosts: all
    connection: local
    gather_facts: yes
    user: root
   [...]
  </code></pre>
  
  <p>I keep getting the following error:</p>
  
  <pre><code># ansible-pull -d /tmp/myrepo -U 'http://mygithost/myrepo' 
  Starting ansible-pull at 2015-06-09 15:04:05
  localhost | success &gt;&gt; {
      "after": "2e4d1c637170f95dfaa8d16ef56491b64a9f931b",
      "before": "d7520ea15baa8ec2c45742d0fd8e209c293c3487",
      "changed": true
  }
  
  **ERROR: Specified --limit does not match any hosts**
  </code></pre>
  
  <p>The only way I've been able to avoid the error is to create an explicit inventory file with an explicit groupname and explicit hostnames that is then referred to with the '-i' flag like so:</p>
  
  <pre><code># cat /tmp/myrepo/myinventory
  [mygroup]
  myhost1
  myhost2
  
  # cat /tmp/myrepo/local.yml
  - hosts: mygroup
    connection: local
    gather_facts: yes
    user: root
   [...]
  
  # ansible-pull -d /tmp/myrepo -i myinventory -U 'http://mygithost/myrepo' 
  </code></pre>
  
  <p>But I don't want that, I want any host, no matter whether its name or role is known to be able to run an ansible-pull against the repo and run the playbook without having to explicitly configure the name of the host into the inventory.  How do I do that?</p>