Minor improvements.

Signed-off-by: mmazas <[email protected]>

.github/workflows/main.yml

@@ -47,7 +47,26 @@ jobs:
 
     steps:
 
-    - uses: actions/checkout@v4
+    - name: clone javacc-8
+      uses: actions/checkout@v4
+      with:
+        repository: javacc/javacc-8.git
+        path: javacc-8
+        ref: release
+
+    - name: clone javacc-8-core
+      uses: actions/checkout@v4
+      with:
+        repository: javacc/javacc-8-core.git
+        path: javacc-8-core
+        ref: release
+
+    - name: clone javacc-8-cpp
+      uses: actions/checkout@v4
+      with:
+        repository: javacc/javacc-8-cpp.git
+        path: javacc-8-cpp
+        ref: release
 
     - name: Set up JDK 11
       uses: actions/setup-java@v4
@@ -62,9 +81,15 @@ jobs:
          path: ~/.m2
          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
          restore-keys: ${{ runner.os }}-m2
-
-#    - name: Build package on javacc-8-cpp
-#      run: mvn -B -e package
+
+    # -B: batch mode; -e: produce execution error messages;
+    # -X: debug mode; -N: non-recursive (don't build submodules)
+
+    - name: Build install on javacc-8 only
+      run: mvn install -B -N --show-version --file javacc-8/pom.xml
+
+    - name: Run install on javacc-8-core
+      run: mvn install -B --show-version --file javacc-8-core/pom.xml
 
     - name: Run install on javacc-8-cpp
-      run: mvn -B -e install
+      run: mvn install -B --show-version --file javacc-8-cpp/pom.xml