tfplan_step1.yml

steps:
  - task: Cache@2
    displayName: 'Register TF cache'
    inputs:
      key: terraform | $(Agent.OS) | "$(Build.BuildNumber)" | $(Build.SourceVersion) | $(tfComponent) | "$(tfVarFileName)"
      path: $(tfExecutionDir)
  - task: TerraformInstaller@0
    displayName: 'Install Terraform'
    inputs:
      terraformVersion: '$(terraformVersion)'
  - task: TerraformTaskV1@0
    displayName: 'Terraform Init'
    inputs:
      provider: 'azurerm'
      command: 'init'
      workingDirectory: '$(tfExecutionDir)'
      backendServiceArm: '$(serviceConnectionName)'
      backendAzureRmResourceGroupName: '$(backendAzureRmResourceGroupName)'
      backendAzureRmStorageAccountName: '$(backendAzureRmStorageAccountName)'
      backendAzureRmContainerName: '$(backendAzureRmContainerName)'
      backendAzureRmKey: '$(backendAzureRmKey)'
  - task: TerraformTaskV1@0
    displayName: 'Terraform Plan'
    inputs:
      provider: 'azurerm'
      command: 'plan'
      commandOptions: '-var-file=../zone/sandboxuks1.tfvars -out=${BUILD_BUILDNUMBER}.tfplan'
      workingDirectory: '$(tfExecutionDir)'
      environmentServiceNameAzureRM: '$(serviceConnectionName)'