Check for variable in condition

Pipeline workflows
1

Hi,

how can I check, if a variable exists in a condition? I want to run a step only, if a variable does not exists.

Thanks
Pascal

2

Hello. When a variable does not exist at all, if you try to interpolate it will not expand at all.

So you can use the following code

run_optional_step:
  title: Install dependencies
  image: python:3.6.4-alpine3.6
  commands:
    - pip install .
   when:
      condition:
        all:
          whenMyVarisNotSet: 'includes("${{MY_VARIABLE}}", "MY_VARIABLE") == true'