I need to create new variable from contents of other variables. Currently I'm using something like this:
- command: echo "{{ var1 }}-{{ var2 }}-{{ var3 }}"
register: newvar
The problem is:
{{ var1 }}...{{ varN }} brings too long strings and very ugly code.{{ newvar.stdout }} a bit better but confusing.set_fact module caches fact between runs. It isn't appropriate for me.Is there any other solution?
Since strings are lists of characters in Python, we can concatenate strings the same way we concatenate lists (with the + sign):
{{ var1 + '-' + var2 + '-' + var3 }}
If you want to pipe the resulting string to some filter, make sure you enclose the bits in parentheses:
e.g. To concatenate our 3 vars, and get a sha512 hash:
{{ (var1 + var2 + var3) | hash('sha512') }}
Note: this works on Ansible 2.3. I haven't tested it on earlier versions.
~) operator.Good question. But I think there is no good answer which fits your criteria. The best I can think of is to use an extra vars file.
A task like this:
- include_vars: concat.yml
And in concat.yml you have your definition:
newvar: "{{ var1 }}-{{ var2 }}-{{ var3 }}"
As simple as joining lists in python itself.
ansible -m debug -a msg="{{ '-'.join(('list', 'joined', 'together')) }}" localhost
localhost | SUCCESS => {
"msg": "list-joined-together" }
Works the same way using variables:
ansible -m debug -a msg="{{ '-'.join((var1, var2, var3)) }}" localhost
ansible -m debug -a msg="title {{ '-'.join((var1, var2, var3)) }}" localhost not work?
ansible -m debug -a "msg='{{ var1 }} title {{ var1 }} {{ \"-\".join((var1, var2, var3)) }}'" localhost -e var1=test -e var2=foo -e var3=baransible -m debug -a "msg='{{ var1 }} title {{ var1 }} {{ '-'.join((var1, var2, var3)) }}'" localhost -e var1=test -e var2=foo -e var3=bar