How to use pipe character in YAML specs?

[denis.kot]

I have a simple script:

DEV:
  tasks:
    - checkout: SOME / Repo
    - script: |
        #!/bin/bash
        set -ex
        echo '{"a":"b"}' | jq -M

But for some reason the last line is failing with the following error:

...
error	15-Feb-2022 19:29:33	+ jq -M
error	15-Feb-2022 19:29:33	+ echo '{"a":"b"}'
error	15-Feb-2022 19:29:33	jq - commandline JSON processor [version 1.5-1-a5b5cbe]
error	15-Feb-2022 19:29:33	Usage: jq [options] <jq filter> [file...]
error	15-Feb-2022 19:29:33	
error	15-Feb-2022 19:29:33		jq is a tool for processing JSON inputs, applying the
error	15-Feb-2022 19:29:33		given filter to its JSON text inputs and producing the
error	15-Feb-2022 19:29:33		filter's results as JSON on standard output.
error	15-Feb-2022 19:29:33		The simplest filter is ., which is the identity filter,
error	15-Feb-2022 19:29:33		copying jq's input to its output unmodified (except for
error	15-Feb-2022 19:29:33		formatting).
error	15-Feb-2022 19:29:33		For more advanced filters see the jq(1) manpage ("man jq")
error	15-Feb-2022 19:29:33		and/or https://stedolan.github.io/jq
error	15-Feb-2022 19:29:33	
...

It seems '|' should be somehow escaped. I tried to use \| but it doesn't work. What I'm doing wrong?

[Eduardo Alvarenga · Accepted solution]

Hello @denis.kot

jq needs a filter. Try something like this:

echo '{"a":"b"}' | jq -M .

Eduardo Alvarenga
Atlassian Support APAC

[denis.kot]

Weird, in the console it's working without any filter