GitHub Actions 高速化：差分のみチェックするように

Author: Takahashi.Hiroyuki

.github/workflows/java-format-check.yml

@@ -21,6 +21,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Validate Gradle Wrapper
         uses: gradle/wrapper-validation-action@f9c9c575b8b21b6485636a91ffecd10e558c62f6 # v3.5.0
@@ -35,4 +37,9 @@ jobs:
         run: chmod +x gradlew
 
       - name: Run Spotless Check
-        run: ./gradlew spotlessCheck --no-daemon
+        run: |
+          if [ -n "${{github.base_ref}}" ]; then
+            ./gradlew spotlessCheck --no-daemon -PdiffBase=origin/${{github.base_ref}}
+          else
+            ./gradlew spotlessCheck --no-daemon
+          fi