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Ubuntu – How do I pass pipeline variable into a template and then use in a condition

I want to pass a variable called publish defined in the pipeline definition UI into a template called echo.yml from the main pipeline.yml then in the template use the value of the variable as a condition on a task running or not.

So far no success.

Is this actually possible ?

Simplified example below, the real use case is to control whether or not a publish task executes.

echo.yml:

parameters:
- name: 'desc'
  type: string
  default: none
- name: 'publish'
  type: string
  default: 'false'

steps:
- task: Bash@3
  condition: ${{ parameters.publish  }}
  inputs:
    targetType: 'inline'
    script: |
      echo desc is ${{ parameters.desc }}
      echo publish is ${{ parameters.publish }}

pipeline.yml:

pool:
  vmImage: 'ubuntu-latest'

steps:
- task: Bash@3
  inputs:
    targetType: 'inline'
    script: |
      # Write your commands here
      echo SBN IS $(Build.SourceBranchName)
      echo SB IS $(Build.SourceBranch)

- template: echo.yml
  parameters:
    desc: 'my description'
    publish: ${{ variables.publish }}
Tags:

2

Answers


  1. 0

    Given that you want to run a task or not based on a parameter, you can use a template expression ${{ if ... }} instead of using a condition.

    Example:

    # echo.yml

parameters:
  - name: desc
    type: string
    default: none
    
  - name: publish
    type: boolean    <---------- change to boolean
    default: false

steps:
- ${{ if parameters.publish }}:
  - task: Bash@3
    inputs:
      targetType: 'inline'
      script: |
        echo desc is ${{ parameters.desc }}
        echo publish is ${{ parameters.publish }}

# other tasks here

    Using a condition:

    - task: Bash@3
  inputs:
    targetType: 'inline'
    script: |
      echo desc is ${{ parameters.desc }}
      echo publish is ${{ parameters.publish }}
  condition: and(succeeded(), eq('${{ parameters.publish }}', 'true'))

    Note:

    • parameter publish can be changed to boolean, which will be displayed as a checkbox when queuing a new build.
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  2. 0

    If you define the variable in pipeline definition UI, it cannot get the value as parameter ${{ variables.publish }} for template.

    Instead, you can define the variable in main yaml directly，it works then.

    trigger: none

variables:
- name: publish
  value: false           # define variable in main yaml

pool:
  vmImage: 'ubuntu-latest'

steps:
- task: Bash@3
  inputs:
    targetType: 'inline'
    script: |
      # Write your commands here
      echo SBN IS $(Build.SourceBranchName)
      echo SB IS $(Build.SourceBranch)

- template: echo.yml
  parameters:
    desc: 'my description'
    publish: ${{ variables.publish }}

    enter image description here

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