No source code change.

.github/workflows/PR-content-check.yml

@@ -0,0 +1,31 @@
+# This workflow will build a Java project with Maven
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: PR Content Check
+
+on:
+  workflow_call:
+    outputs:
+      result:
+        description: "The first output string"
+        value: ${{ jobs.check-PR-content.outputs.output1 }}
+
+jobs:
+  check-PR-content:
+    name: Check PR Content
+    runs-on: ubuntu-latest
+    outputs:
+      output1: ${{ steps.check-content.outputs.result }}
+    steps:
+      - name: Checkout the incoming pull request
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+          path: ion-java-new
+
+      - name: Check the content of the last commit
+        id: check-content
+        run: |
+          cd ion-java-new
+          if [[ $(git log -1 --name-only) == *"src/"* ]]; then echo "result=pass" >> $GITHUB_OUTPUT; else echo "result=fail" >> $GITHUB_OUTPUT; fi

.github/workflows/ion-java-performance-regression-detector.yml

@@ -3,12 +3,18 @@
 
 name: Ion Java performance regression detector
 
-on: [pull_request]
+on:
+  pull_request
 
 jobs:
+  PR-Content-Check:
+    uses:  linlin-s/ion-java/.github/workflows/PR-content-check.yml@master
   detect-regression:
     name: Detect Regression
-
+    needs: PR-Content-Check
+    if: ${{ needs.PR-Content-Check.outputs.result == 'pass' }}
+    outputs:
+      output1: ${{ steps.regression_result.outputs.result }}
     runs-on: ubuntu-latest
 
     steps:
@@ -18,7 +24,7 @@ jobs:
           java-version: 1.8
 
       - name: Checkout ion-java from the new commit.
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           path: ion-java-new
@@ -27,7 +33,7 @@ jobs:
         run: cd ion-java-new && git submodule init && git submodule update && ./gradlew clean publishToMavenLocal
 
       - name: Checkout ion-java-benchmark-cli
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           repository: amzn/ion-java-benchmark-cli
           ref: master
@@ -70,7 +76,7 @@ jobs:
         run : rm -r /home/runner/.m2
 
       - name: Checkout the current commit
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           repository: amzn/ion-java
           ref: master
@@ -116,7 +122,7 @@ jobs:
         run: |
           result=true
           cd benchmarkResults && for FILE in *; do message=$(java -jar /home/runner/work/ion-java/ion-java/ion-java-benchmark-cli/target/ion-java-benchmark-cli-0.0.1-SNAPSHOT-jar-with-dependencies.jar compare --benchmark-result-previous $FILE/previous.ion --benchmark-result-new $FILE/new.ion $FILE/report.ion | tee /dev/stderr) && if [ "$message" != "no regression detected" ]; then result=false; fi; done
-          echo "::set-output name=regression-result::$result"
+          echo "regression-result=$result" >> $GITHUB_OUTPUT
           if [ "$result" = "true" ]; then echo "No regression detected!" >> $GITHUB_STEP_SUMMARY; fi
 
       - name: Upload comparison reports to the benchmark results directory
@@ -131,4 +137,4 @@ jobs:
         if: ${{ env.regression_detect == 'false' }}
         run: |
           cd benchmarkResults && echo "| Benchmark command | GC Allocation Rate | Heap Usage | Speed |" >> $GITHUB_STEP_SUMMARY && echo "| ----------- | ----------- |----------- | ----------- |" >> $GITHUB_STEP_SUMMARY && for FILE in *; do regressionDetection=$(java -jar /home/runner/work/ion-java/ion-java/ion-java-benchmark-cli/target/ion-java-benchmark-cli-0.0.1-SNAPSHOT-jar-with-dependencies.jar compare --benchmark-result-previous $FILE/previous.ion --benchmark-result-new $FILE/new.ion $FILE/report.ion) && if [ "$regressionDetection" != "no regression detected" ]; then command=$(echo $FILE | sed "s/_/ /g") && read gc heapUsage speed <<< $( echo ${regressionDetection} | awk -F", " '{print $1" "$2" "$3}' ) && echo "|$command|$gc|$heapUsage|$speed|" >> $GITHUB_STEP_SUMMARY; fi; done
-          exit 1
+          exit 1

.github/workflows/ion-test-driver.yml

@@ -1,10 +1,15 @@
 name: ion-test-driver
 
-on: [pull_request]
+on:
+  pull_request
 
 jobs:
+  PR-Content-Check:
+    uses: linlin-s/ion-java/.github/workflows/PR-content-check.yml@master
   ion-test-driver:
     runs-on: macos-10.15
+    needs: PR-Content-Check
+    if: ${{ needs.PR-Content-Check.outputs.result == 'pass' }}
     steps:
       - name: Checkout ion-java
         uses: actions/checkout@master
@@ -13,6 +18,7 @@ jobs:
           ref: master
           path: ion-java
 
+
       - name: Checkout ion-test-driver
         uses: actions/checkout@master
         with:

src/com/amazon/ion/apps/EncodeApp.java

@@ -24,7 +24,6 @@
 import java.io.IOException;
 import java.util.ArrayList;
 
-
 public class EncodeApp
     extends BaseApp
 {