Per #2856, update the testing.yml workflow dispatch option to let the…

… comparison branch be manually defined.

.github/jobs/set_job_controls.sh

@@ -91,6 +91,15 @@ elif [ "${GITHUB_EVENT_NAME}" == "workflow_dispatch" ]; then
     run_diff=true
   fi
 
+  truth_data_version=${force_compare_branch}
+
+  # if main_vX.Y branch, use X.Y input data
+  if [ "${force_ref_branch:0:6}" == "main_v" ]; then
+    input_data_version=${force_compare_branch:6}
+  else
+    input_data_version=${force_compare_branch}
+  fi
+
 fi
 
 # if updating truth or running diff, run unit tests

.github/workflows/testing.yml

@@ -37,8 +37,13 @@ on:
     inputs:
       force_tests:
         description: 'Run the unit tests'
-        default: true
         type: boolean
+        default: true
+      force_compare_branch:
+        description: 'Branch name for input data and output comparison'
+        type: string
+        default: develop
+        required: true
 
 env:
   DOCKERHUB_REPO: dtcenter/met-dev
@@ -57,6 +62,7 @@ jobs:
         env:
           commit_msg: ${{ github.event.head_commit.message }}
           force_tests: ${{ github.event.inputs.force_tests }}
+          force_compare_branch: ${{ github.event.inputs.force_compare_branch }}
 
     outputs:
       run_compile: ${{ steps.job_status.outputs.run_compile }}