What is YAML

Since pipelines, both in ADO and GitHub Actions, use YAML to define what should be done, we will take a brief look at what YAML is and how the syntax should be written.

YAML can also stand for YAML Ain’t Markup Language.

It is a human-readable data serialization language and is widely used for configuration files. The syntax is intentionally minimal and uses a Python-style indentation to show nested objects.

Let’s take the following YAML snippet as an example:

stages:
- stage: DeployTest
  displayName: 'Deploy to Test'
  jobs:
  - job: deployTest
    pool:
      vmImage: 'windows-latest'
    steps:
    - checkout: self
      clean: true
      submodules: false
      displayName: "Checkout repo"
- stage: DeployProd...