Check for empty DUE_ON

README.adoc

@@ -15,18 +15,22 @@ You can integrate with GitHub Actions using something like this
 on:
   milestone:
     types: [created, opened, edited]
-
+env:
+  DUE_ON: ${{ github.event.milestone.due_on }}
+  TITLE: ${{ github.event.milestone.title }}
 jobs:
   spring-releasetrain-checks:    
     name: Check DueOn is on a Release Date
     runs-on: ubuntu-latest
     steps:
-    - name: Dump GitHub context
-      env:
-        DUE_ON: ${{ github.event.milestone.due_on }}
+    - name: Print Milestone Being Checked
+      run: echo "Validating DueOn '$DUE_ON' for milestone '$TITLE'"
+    - name: Validate DueOn
+      if: env.DUE_ON != ''
       run: |
         export TOOL_VERSION=0.1.1
         wget "https://repo.maven.apache.org/maven2/io/spring/releasetrain/spring-release-train-tools/$TOOL_VERSION/spring-release-train-tools-$TOOL_VERSION.jar"
         java -cp "spring-release-train-tools-$TOOL_VERSION.jar" io.spring.releasetrain.CheckMilestoneDueOnMain --dueOn "$DUE_ON" --expectedDayOfWeek THURSDAY --expectedMondayCount 3
 
+
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