CI: validate Gradle wrapper once.

Author: carlosame

.github/workflows/build.yml

@@ -13,6 +13,16 @@ on:
 
 jobs:
 
+  # Validate wrapper to prevent potential supply chain attack
+  gradle-wrapper-validation:
+    runs-on: ubuntu-latest
+
+    name: Validate Gradle wrapper
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: gradle/wrapper-validation-action@v1
+
   build:
     runs-on: ubuntu-latest
 
@@ -33,10 +43,6 @@ jobs:
           java-version: ${{ matrix.java }}
           distribution: 'adopt'
 
-      # Validate wrapper to prevent potential supply chain attack
-      - name: Validate Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
-
       # Build
       - name: Build with Gradle
         run: ./gradlew build