feat: set variable to indicate run is for a tag, update workspace logic

terraform/pipeline/azure-pipelines.yml

@@ -24,9 +24,13 @@ stages:
             value: $[variables['System.PullRequest.SourceBranch']]
           - name: INDIVIDUAL_SOURCE
             value: $[variables['Build.SourceBranchName']]
+          - name: IS_TAG
+            value: $[startsWith(variables['Build.SourceBranch'], 'refs/tags/')]
           - name: TARGET
             value: $[variables['System.PullRequest.TargetBranch']]
         steps:
+          - bash: |
+              echo $(IS_TAG)
           # set the workspace variable at runtime (rather than build time) so that all the necessary variables are available, and we can use Python
           # https://learn.microsoft.com/en-us/azure/devops/pipelines/process/set-variables-scripts?view=azure-devops&tabs=bash#about-tasksetvariable
           - bash: |

terraform/pipeline/workspace.py

@@ -1,10 +1,12 @@
 import os
+import re
 import sys
 
 REASON = os.environ["REASON"]
 # the name of the variable that Azure Pipelines uses for the source branch depends on the type of run, so need to check both
 SOURCE = os.environ.get("OTHER_SOURCE") or os.environ["INDIVIDUAL_SOURCE"]
 TARGET = os.environ["TARGET"]
+IS_TAG = os.environ["IS_TAG"]
 
 # the branches that correspond to environments
 ENV_BRANCHES = ["dev", "test", "prod"]
@@ -15,6 +17,8 @@
 elif REASON in ["IndividualCI", "Manual"] and SOURCE in ENV_BRANCHES:
     # it's being run on one of the environment branches, so use that
     environment = SOURCE
+elif REASON in ["IndividualCI"] and IS_TAG and re.fullmatch(r"20\d\d.\d\d.\d*", SOURCE):
+    environment = "test"
 else:
     # default to running against dev
     environment = "dev"