Conditionally including tasks or templates not supported, "The first property must be a task"

https://docs.microsoft.com/en-us/azure/devops/pipelines/process/templates?view=azure-devops#parameters-to-select-a-template-at-runtime

The preceding link describes a way to conditionally include templates based on parameters.

#azure-pipeline.yml
parameters:
- name: experimentalTemplate
  displayName: 'Use experimental build process?'
  type: boolean
  default: false

steps:
- ${{ if eq(parameters.experimentalTemplate, true) }}:
  - template: experimental.yml
- ${{ if not(eq(parameters.experimentalTemplate, true)) }}:
  - template: stable.yml

This extension does not see this as a valid template, resulting in error “The first property must be a task”.

[50Wliu]

This is the same as #187, so closing in favor of that one. It’s on the todo list of things to tackle!

[jason-ha]

...
steps:
- ${{ if eq(parameters.experimentalTemplate, true) }}:
  - template: experimental.yml
- ${{ if not(eq(parameters.experimentalTemplate, true)) }}:
  - template: stable.yml

@iTiamo I recommend using True/False in yaml. Canonical values are True/False rather than true/false. It normally doesn’t matter, but it can crop up and the subtle capitalization difference may be hard to spot. It bit my team once; so we just use True/False everywhere now. Also with a Boolean parameter there is no need for eq(parameters.experimentalTemplate, true), parameters.experimentalTemplate works well.