Bash syntax for equality check of Azure template param containing any string - Stack Overflow

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In an Azure Devops YAML pipeline I'm passing in a parameter which contains all manner of things - double and single quotes, newlines, etc. It'll vary on each pipeline run.

Inside the template, I need to do a very simple equality check of that value against a specificx string, "valueX" like in the example below:

 parameters:
   - name: strValue

 steps:
 - task: Bash@3
   displayName: 'Do stuff'
   inputs:
     targetType: inline
     script: |
       if [ "${{ parameters.strValue }}" == "valueX" ]; then 
          ...
       fi

But I can't hit on the right syntax. parameters.strValue gets actually evaluated, so the entire string is output within the bash script, causing syntax errors when it contains certain characters. I was hoping to do a comparison using the var name as a reference instead.

I tried using heredoc syntax in the bash script to store the evaluated parameter value into a var, but that doesn't appear to work within the azure-YAML setting - it can never find the closing EOF. Perhaps there's a much simpler solution to this?

In an Azure Devops YAML pipeline I'm passing in a parameter which contains all manner of things - double and single quotes, newlines, etc. It'll vary on each pipeline run.

Inside the template, I need to do a very simple equality check of that value against a specificx string, "valueX" like in the example below:

 parameters:
   - name: strValue

 steps:
 - task: Bash@3
   displayName: 'Do stuff'
   inputs:
     targetType: inline
     script: |
       if [ "${{ parameters.strValue }}" == "valueX" ]; then 
          ...
       fi

But I can't hit on the right syntax. parameters.strValue gets actually evaluated, so the entire string is output within the bash script, causing syntax errors when it contains certain characters. I was hoping to do a comparison using the var name as a reference instead.

I tried using heredoc syntax in the bash script to store the evaluated parameter value into a var, but that doesn't appear to work within the azure-YAML setting - it can never find the closing EOF. Perhaps there's a much simpler solution to this?

• azure
• azure-devops

Share Improve this question Follow asked Mar 15 at 23:40 benjamin.keenbenjamin.keen 1,98622 gold badges2020 silver badges2929 bronze badges

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2 Answers 2

Sorted by: Reset to default 1

This is a bash and interpolation parameter issue with with ADO pipelines. This should work using env to call the parameter

parameters:
  - name: strValue

steps:
- task: Bash@3
  displayName: 'Do stuff'
  env:
    PARAMETER: '${{ parameters.strValue }}'
  inputs:
    targetType: inline
    script: |
      if [ "$PARAMETER" == "valueX" ]; then 
        echo "Matching tested and confirmed"
      fi

I tested this and I can confirmed it worked.

Ok, found a solution. It was to move the logic outside of the bash code.

 parameters:
   - name: strValue

 steps:
 - task: Bash@3
   condition: ${{ eq(parameters.strValue, 'valueX') }}
   displayName: 'Do stuff'
   inputs:
     targetType: inline
     script: |
       ...

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