Introduce pmd

Author: AB-xdev

.github/workflows/check-build.yml

@@ -73,8 +73,9 @@ jobs:
         path: build/libs/template-placeholder-*.jar
         if-no-files-found: error
 
-  code-style:
+  checkstyle:
     runs-on: ubuntu-latest
+    if: ${{ github.event_name != 'pull_request' || !startsWith(github.head_ref, 'renovate/') }}
 
     strategy:
       matrix:
@@ -93,3 +94,34 @@ jobs:
 
     - name: Run Checkstyle
       run: ./gradlew checkstyleMain checkstyleTest -PcheckstyleEnabled=true
+
+  pmd:
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name != 'pull_request' || !startsWith(github.head_ref, 'renovate/') }}
+
+    strategy:
+      matrix:
+        java: [17]
+        distribution: [temurin]
+
+    steps:
+    - uses: actions/checkout@v4
+      
+    - name: Set up JDK
+      uses: actions/setup-java@v4
+      with:
+        distribution: ${{ matrix.distribution }}
+        java-version: ${{ matrix.java }}
+        cache: 'gradle'
+
+    - name: Run PMD
+      run: ./gradlew pmdMain pmdTest
+
+    - name: Upload report
+      if: always()
+      uses: actions/upload-artifact@v4
+      with:
+        name: pmd-report
+        if-no-files-found: ignore
+        path: |
+          build/reports/pmd/*.html

build.gradle

@@ -2,6 +2,7 @@ plugins {
     id 'java'
     id 'idea'
     id 'checkstyle'
+    id 'pmd'
     id 'org.jetbrains.intellij' version '1.17.4'
     id 'org.sonarqube' version '5.0.0.4638'
 }
@@ -78,6 +79,11 @@ checkstyle {
     toolVersion = checkstyleVersion
 }
 
+pmd {
+    consoleOutput = true
+    ruleSetFiles = files(".config/pmd/ruleset.xml")
+}
+
 tasks.withType(Checkstyle).configureEach {
     enabled = project.hasProperty("checkstyleEnabled");
 }