Azure Devops pipelines: Condition inside loop not working? - azure-devops

Question

In trying to run a script on a loop only if a variable is true but the script never runs :(
It works if i set it as "condition:" to the script but i would like for the task to not even be printed if not to run, therefore would like to use the ${{if...}}
(tried with boolean and string)
parameters:
charts: []
outputChartsDebugInfo: false
steps:
- ${{ each chart in parameters.charts }}:
- script: |
echo "TEST ${{parameters.outputChartsDebugInfo}}" #this outputs true
echo "Deployment values:"
echo "chart name - ${{chart.Name}}"
#...
displayName: Deploy ${{chart.Name}}
- ${{ if eq(parameters.outputChartsDebugInfo, true) }}:
- script: |
echo "DEBUG:"
#...
displayName: Show ${{chart.Name}} debug info
Should this be working?

Answer 1

The first thing that you need to change is how you set your parameters. Then, you should loop over an object that contains some values. Your charts object is empty in your code.
parameters:
- name: charts
type: object
default: [one,two]
- name: outputChartsDebugInfo
default: false
steps:
- ${{ each chart in parameters.charts }}:
- script: |
echo "TEST ${{parameters.outputChartsDebugInfo}}" #this outputs true
echo "Deployment values:"
echo "chart name - ${{chart}}"
displayName: Deploy ${{chart}}
- ${{ if eq(parameters.outputChartsDebugInfo, true ) }}:
- script: |
echo "DEBUG:"
displayName: Show ${{chart }} debug info

Answer 2

Just it case its handy for anyone, the if inside the loop works fine, the parameters outputChartsDebugInfo was being read from a variable, but the syntax used $(var), expands only at runtime before a task executes, and the necessary is that it expands at compile time, so the fix in this case was change the syntax on the variable in the calling script:
steps:
- template: charts-pipeline-template.yml
parameters:
outputChartsDebugInfo: ${{variables.outputChartsDebugInfo}}
charts:
- Name: xxx
- Name: yyy
instead of
steps:
- template: charts-pipeline-template.yml
parameters:
outputChartsDebugInfo: $(outputChartsDebugInfo)
charts:
- Name: xxx
- Name: yyy