failed_when sequence logic

[Tom Paine]

Having trouble understanding if there's a bug in failed_when, or my understanding is incorrect -

a false and a true are OR'ing in a YAML sequence to false:

Fails (failed when evals to true):

      failed_when:

        - '"300 OK" not in command_result.stderr'

Passes (failed when evals to false):

      failed_when:

        - command_result.rc != 0

Both together pass (failed when evals to false):

      failed_when:

        - '"300 OK" not in command_result.stderr'

        - command_result.rc != 0

Spent an hour going back a forth trying to find a syntax error. failed_when passes the task when it evaluates to false, I've seen a post from Michael DeHaan saying sequences are treated like ORs.

What am I not seeing?

[Matt Martz]

When you give when, changed_when or failed_when a list, the items are ANDed, not ORed.

--
You received this message because you are subscribed to the Google Groups "Ansible Project" group.
To unsubscribe from this group and stop receiving emails from it, send an email to ansible-proje...@googlegroups.com.
To post to this group, send email to ansible...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/c8528625-14dc-40dc-b3c7-b10c8b617c0e%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--

Matt Martz
@sivel
sivel.net

[Tom Paine]

Simplified, I've tried:

failed_when:

  - true

  - false

evals to false. Surely a bug?

This is the post where sequences are said to evaluate as OR

https://groups.google.com/d/msg/ansible-project/cIaQTmY3ZLE/c5w8rlmdHWIJ

[Matt Martz]

No, pretty sure that is correct, here is the output from the operation of 'True and False' in Python:

In [1]: True and False

Out[1]: False

Like I said, they are ANDed not ORed.

If you want to use an or, you are going to have to write it out such as:

failed_when:  true or false

--

You received this message because you are subscribed to the Google Groups "Ansible Project" group.
To unsubscribe from this group and stop receiving emails from it, send an email to ansible-proje...@googlegroups.com.
To post to this group, send email to ansible...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/fbc33caa-2428-4cce-a95e-6f53fd509c97%40googlegroups.com.

For more options, visit https://groups.google.com/d/optout.

[Tom Paine]

Not convinced it's good syntax, for a failure_when I'd expect an OR.

But ok.

My issue is that I now I want to OR a bunch of multiline statements:

      failed_when:

        - >

          "long string with characters that need escaping"

          over many $%^&*

          lines

        - >

          and another

          long

          line

        - etc

        - etc

How to OR over multiline sequences?

[Tom Paine]

Ok, got it.

failed_when: >
 "foo
 bar"
 not in x or
 "baz
 bar"
 not in y

etc. Thanks for the help Matt. Hottest July day on record with no air-con wasn't helping either :)