How-to: Check environment variable value or existence in conditionals

Overview

You are trying to run a specific step only if a variable is set. You are trying to have branching logic in one pipeline.

Details

1. Using the following syntax, you can check whether a variable exists for the current build:

   when:
       condition:
         all:
           whenVarIsMissing: 'includes("${{MyVar}}", "{{MyVar}}") == true'
   

2. The following syntax can be used to check for a specific value:

   when:
       condition:
         all:
           whenVarValue: '"${{MyVar}}" == myValue"'
   

3. If desired, you can combine multiple checks.

Related Items

Conditional Execution of Steps