fix(pipeline): load kv based on branch in scheduled drift detection

[julie-ng]

Problem

Scheduled Drift Detection Builds were failing because the key vaults with the credentials were not being loaded.

Error Message

***** Confirm Key Vault Integration *****
Fail pipeline if no key vault is loaded before Terraform tries and fails.
KV_DEBUG_ENV: $(kv-debug-env)

Key Vault not loaded. If loaded properly, debug env value would be 'dev' or 'production'.
##[error]Bash exited with code '1'.

Cause

The - template: vars/global.yaml is loaded but its values, e.g. variables.isMain do not seem to be immediately available in the same global variables: scope.

Solution

Use Built-In variables instead of my preferred cleaner version:

variables:
- template: vars/global.yaml
- ${{ if eq(variables['Build.SourceBranch'], 'refs/heads/main') }}:
  - group: e2e-gov-demo-dev-kv
- ${{ if eq(variables['Build.SourceBranch'], 'refs/heads/production') }}:
  - group: e2e-gov-demo-kv

[azure-pipelines]

🟢  No configuration drift detected

Source Version: b987772