[ansible-project] How to check if previous shell task returns an empty string

[Dump Hole]

I have two shell tasks. The first one runs a check and returns a list of
ids to be removed. The second one will remove these ids.

The stdout of the first task looks like this:
1
2
3
4

which then gets fed into the second task to remove 1, 2, 3, 4

But if the first one cannot find ids to be removed, it will instead return
an empty string rather than an error. How do I check in Ansible for an
empty string, and how do I pass I set the variable through register

- name: task1
shell: script1
register: result
- name: task2
shell: script2 `script1`
when: result.length() > 0 <<< ??

I tried with stdout_lines.length(), length, size(), size, len(). No luck.

[Brian Coca]

i think you want:
result.stdout|length > 0

Post by Dump Hole
I have two shell tasks. The first one runs a check and returns a list of
ids to be removed. The second one will remove these ids.
1
2
3
4
which then gets fed into the second task to remove 1, 2, 3, 4
But if the first one cannot find ids to be removed, it will instead return
an empty string rather than an error. How do I check in Ansible for an
empty string, and how do I pass I set the variable through register
- name: task1
shell: script1
register: result
- name: task2
shell: script2 `script1`
when: result.length() > 0 <<< ??
I tried with stdout_lines.length(), length, size(), size, len(). No luck.
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