Multiline shell script in Ansible with Jinja variables

Question

I was following this question How to do multiline shell script in Ansible however, this solution does not work in my a bit complicated example. I am trying to make this piece of YAML working:

- name: "set wifi country code to {{ wifi_country }}"
  shell: |
    list_wlan_interfaces() {
      for dir in /sys/class/net/*/wireless; do
        if [ -d "$dir" ]; then
          basename "$(dirname "$dir")"
        fi
      done
    }
    IFACE="$(list_wlan_interfaces | head -n 1)"
    wpa_cli -i "$IFACE" set country {{ wifi_country }}
    wpa_cli -i "$IFACE" save_config > /dev/null"

However, I am getting error:

ERROR! failed at splitting arguments, either an unbalanced jinja2 block or quotes: list_wlan_interfaces() {
  for dir in /sys/class/net/*/wireless; do                          
    if [ -d "$dir" ]; then                                                    
      basename "$(dirname "$dir")"           
    fi                                                                                                                                 
  done                                                                                                                              
}                                                                                         
IFACE="$(list_wlan_interfaces | head -n 1)"                                                    
wpa_cli -i "$IFACE" set country {{ wifi_country }}
wpa_cli -i "$IFACE" save_config > /dev/null"

The error appears to have been in 'rpi.yml': line 7, column 5, but may
be elsewhere in the file depending on the exact syntax problem.                                                                                            

The offending line appears to be:

  tasks:                             
  - name: "set wifi country code to {{ wifi_country }}"
    ^ here                                  
We could be wrong, but this one looks like it might be an issue with                                  
missing quotes.  Always quote template expression brackets when they
start a value. For instance:                                                                                            

    with_items:
      - {{ foo }}                                  

Should be written as:                  

    with_items:                                                                       
      - "{{ foo }}"

How can I place a shell script containing Jinja variables in Ansible playbook?

That YAML is fine, so there is nothing you have to do to make it work. The problem is in the interpretation of your scalars, outside of YAML: balance your double quotes (hint: look at the last line of your block style literal scalar) — Anthon, Dec 06 '18 at 11:29

score 3 · Answer 1 · answered Dec 06 '18 at 04:57

3

It is a very misleading error message, but your problem is actually that double-quote at the end of /dev/null"

answered Dec 06 '18 at 04:57

mdaniel

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Multiline shell script in Ansible with Jinja variables

1 Answers1