Ansible write on file from jinja file - variables

Question

I want to lanch a application :
command=/usr/bin/toto --config /var/toto/conf1.json /var/toto/conf2.json /var/toto/conf3.json
the config file are on /var/toto directory
task.yml
- name: Ansible find file
find:
paths: "/var/toto"
register: found_files
- name: print files
debug:
msg: "{{ found_files['files'] | map(attribute='path') | map('regex_replace','^.*/(.*)$','\\1') | list }}"
register: file_name
- name: Create the Jinja2 based template
template:
src: "etc/control/config.conf.j2"
dest: "/etc/control/config.conf"
with_dict: "{{ file_name }}"
config.conf.j2
command=/usr/bin/toto --config {% for item in file_name %} /var/toto/{{ item }} {% endfor %}
but, I have get this on my file
/etc/control/config.conf
command=/usr/bin/toto --config /var/opt/msg /var/opt/failed /var/opt/changed
varfile_name :
"msg": [ "conf1.json", "conf2.json", "conf3.json"
]

Answer 1

You're iterating over the dictionary in file_name, which is a task result. If you were to print that out, you would find that it contains something like:
TASK [debug] *********************************************************************************************************************************************************************************
ok: [localhost] => {
"file_name": {
"changed": false,
"failed": false,
"msg": [
"file1",
"file2",
"file3"
]
}
}
So when you iterate over it using for item in file_name, you're iterating over the top level keys (changed, failed, msg).
But this is all the wrong way to do it. You never use the debug module to create variables; that's what set_fact is for. You want something like:
- name: build list of files
set_fact:
file_name: "{{ found_files['files'] | map(attribute='path') | map('regex_replace','^.*/(.*)$','\\1') | list }}"
- name: Create the Jinja2 based template
template:
src: "config.conf.j2"
dest: "config.conf"
After the set_fact task, the variable file_name will contain a
list of file names.
It looks like you're using that regular expression to get the basename
of the files found in your find task. There's a basename filter
that can do that with less complexity:
- name: print files
set_fact:
file_name: "{{ found_files['files'] | map(attribute='path') | map('basename') | list }}"
- name: Create the Jinja2 based template
template:
src: "config.conf.j2"
dest: "config.conf"
Here's the playbook I'm using to test this locally:
- hosts: localhost
gather_facts: true
tasks:
- name: find files
find:
paths: /tmp/example
register: found_files
- name: print files
set_fact:
file_name: "{{ found_files['files'] | map(attribute='path') | map('basename') | list }}"
- name: Create the Jinja2 based template
template:
src: "config.conf.j2"
dest: "config.conf"
Before running this, I run:
mkdir /tmp/example
touch /tmp/exampe/file{1,2,3}
This produces a config.conf file that looks like:
command=/usr/bin/toto --config /var/toto/file3 /var/toto/file2 /var/toto/file1