Maven 빌드 워크플로우에 변경 감지 작업 추가

독립적인 다른 곳을 수정해도, 워크플로우가 무조건 실행되서...

1. my-board-spring5
2. my-board

두가지 프로젝트의 수정이 있을 때만, 워크플로우가 실행되도록 하였다.

워크플로우 설정파일이 수정되었을 때는..
모든 Job이 실행된다.

Co-authored-by: Copilot <copilot@github.com>

Author: fp024

.github/workflows/maven-build.yml

@@ -6,9 +6,34 @@ name: Maven Build Test
 on:
   push:
     branches: [ master ]
+    paths:
+      - 'part-last/my-board-spring5/**'
+      - 'part-last/my-board/**'
+      - '.github/workflows/maven-build.yml'
 
 jobs:
+  detect-changes:
+    runs-on: ubuntu-latest
+    outputs:
+      my-board-spring5: ${{ steps.filter.outputs.my-board-spring5 }}
+      my-board: ${{ steps.filter.outputs.my-board }}
+      workflow: ${{ steps.filter.outputs.workflow }}
+    steps:
+    - uses: actions/checkout@v4
+    - uses: dorny/paths-filter@v3
+      id: filter
+      with:
+        filters: |
+          my-board-spring5:
+            - 'part-last/my-board-spring5/**'
+          my-board:
+            - 'part-last/my-board/**'
+          workflow:
+            - '.github/workflows/maven-build.yml'
+
   build-my-board-spring5-java17:
+    needs: detect-changes
+    if: needs.detect-changes.outputs.my-board-spring5 == 'true' || needs.detect-changes.outputs.workflow == 'true'
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -27,6 +52,8 @@ jobs:
       run: mvn -B clean test --file part-last/my-board-spring5/pom.xml
 
   build-my-board-java21:
+    needs: detect-changes
+    if: needs.detect-changes.outputs.my-board == 'true' || needs.detect-changes.outputs.workflow == 'true'
     runs-on: ubuntu-latest
     permissions:
       contents: read