Read value from Environment variables in Github inputs

Question

I am setting up a Terraform pipeline in Github workflow.

Below is the initial set of code:

name: 'Github Workflow'
run-name: 'Terraform Plan-Apply'

on:
   workflow_dispatch:

    inputs:
      Configuration:
        description: 'Deployment Group'
        required: True
        type: choice
        options:
        - Applications
        - KeyVault
        - Synapse
        - Databricks
      Environment:  
        description: 'Environment'
        required: True
        type: choice
        options:
        - Dev
        - QA
        - Prod
      GithubRunner:
            description: 'Environment'
        required: True
        default: ${{ env.Runner }}

Under Settings in Github, I have created three environments Dev, QA and Prod. Each environment has a variable named 'Runner' which holds the runner information. I tried the above code and it is not fetching the details. Output of the above code: Its showing as ${{ env.Runner }} in the Workflow.

Is there a way to read the value from environment variable? like, fetch the value according to the environment selected?

Answer 1

You need to specify the environment you want to use within the job.

You can specify an environment for each job in your workflow. To do so, add a jobs.<job_id>.environment key followed by the name of the environment.

https://docs.github.com/en/actions/deployment/targeting-different-environments/using-environments-for-deployment

Only then shall the environment variables defined for that environment be available.

I have fixed your workflow file.

name: 'Github Workflow'
run-name: 'Terraform Plan-Apply'

on:
  workflow_dispatch:
    inputs:
      Configuration:
        description: 'Deployment Group'
        required: True
        type: choice
        options:
          - Applications
          - KeyVault
          - Synapse
          - Databricks
      Environment:  
        description: 'Environment'
        required: True
        type: choice
        options:
          - Dev
          - QA
          - Prod

jobs:
  deployment:
    runs-on: ${{ vars.Runner }}
    environment: ${{ inputs.Environment }}