ci: fix java 7 build

.github/workflows/ci.yml

@@ -13,50 +13,36 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [8, 11]
+        java: [7, 8, 11]
 
     steps:
       - uses: actions/checkout@v2
-      - name: Setup java
-        uses: actions/setup-java@v1
-        with:
-          java-version: ${{ matrix.java }}
-      - name: Cache Maven packages
-        uses: actions/cache@v2
-        with:
-          path: ~/.m2
-          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
-          restore-keys: ${{ runner.os }}-m2
-      - name: Setup Node.js
-        uses: actions/setup-node@v1
-        with:
-          node-version: 14.x
-      - name: Run the Maven verify phase
-        run: mvn verify -Dgpg.skip=true
 
-  verify-java7:
-    runs-on: ubuntu-22.04 # with maven 3.8 (https://github.com/actions/runner-images/blob/ubuntu24/20250105.1/images/ubuntu/Ubuntu2204-Readme.md)
-
-    strategy:
-      fail-fast: false
-      matrix:
-        java: [ 7 ]
+      - name: Install Maven 3.8.x (instead of 3.9.x)
+        run: |
+          MAVEN_VERSION=3.8.8
+          wget https://downloads.apache.org/maven/maven-3/$MAVEN_VERSION/binaries/apache-maven-$MAVEN_VERSION-bin.tar.gz
+          tar xzvf apache-maven-$MAVEN_VERSION-bin.tar.gz
+          sudo mv apache-maven-$MAVEN_VERSION /opt/maven
+          sudo rm -f /usr/bin/mvn  # Remove existing symbolic link if it exists
+          sudo ln -s /opt/maven/bin/mvn /usr/bin/mvn  # Create new symbolic link
 
-    steps:
-      - uses: actions/checkout@v2
       - name: Setup java
         uses: actions/setup-java@v1
         with:
           java-version: ${{ matrix.java }}
+
       - name: Cache Maven packages
         uses: actions/cache@v2
         with:
           path: ~/.m2
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
           restore-keys: ${{ runner.os }}-m2
+
       - name: Setup Node.js
         uses: actions/setup-node@v1
         with:
           node-version: 14.x
+
       - name: Run the Maven verify phase
         run: mvn verify -Dgpg.skip=true