Azure Pipelines YAML: Unexpected value 'variables'

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I'm using Azure Pipelines as a part of Azure DevOps. I'm trying to define variables in my template file, because I need to use the same value multiple times.

This is my stage-template.yml:

parameters:
 - name: param1
   type: string
 - name: param2
   type: string

variables:
  var1: path/${{ parameters.param2 }}/to-my-file.yml

stages:
 - stage: Deploy${{ parameters.param2 }}
   displayName: Deploy ${{ parameters.param1 }}
   jobs:  
    ...

When trying to use this pipeline, I get an error message:

/stage-template.yml (Line: 7, Col: 1): Unexpected value 'variables'

Why is this not working? What did I do wrong?

2 Answers

you cant have parameters in the pipeline, only in the templateReferences:

name: string  # build numbering format
resources:
  pipelines: [ pipelineResource ]
  containers: [ containerResource ]
  repositories: [ repositoryResource ]
variables: # several syntaxes, see specific section
trigger: trigger
pr: pr
stages: [ stage | templateReference ]

if you want to use variables in templates you have to use proper syntax:

parameters:
 - name: param1
   type: string
 - name: param2
   type: string

stages:
- stage: Deploy${{ parameters.param2 }}
  displayName: Deploy ${{ parameters.param1 }}
  variables:
    var1: path/${{ parameters.param2 }}/to-my-file.yml
  jobs:  
  ...

This works for me:

In your parent yaml:

stages:
- stage: stage1
  displayName: 'stage from parent'
  jobs:
  - template: template1.yml  
    parameters:
        param1: 'somevalueforparam1'

inside template1:

parameters:  
    param1: ''  
    param2: ''    
jobs:
- job: job1  
  workspace:    
    clean: all  
    displayName: 'Install job'  
   pool:    
      name: 'yourpool'  
  variables:
   - name: var1     
     value: 'value1'
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