Add lin action and minor change to trigger it

.gitea/workflows/build.yml

@@ -1,6 +1,6 @@
 name: Build with cached gradle
 run-name: Building for ${{ gitea.actor }}
-on: [push]
+on: [pull_request]
 
 jobs:
   Build-with-gradle:
@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
-          distribution: 'temurin'
+          distribution: 'zulu'
           java-version: '22'
           cache: 'gradle'
 #          cache-dependency-path: | # optional

.gitea/workflows/linting.yml

@@ -0,0 +1,48 @@
+name: Java Google Checkstyle
+
+permissions:
+  contents: read
+  pull-request: write
+
+on: [push]
+
+jobs:
+  checkstyle:
+    name: 'Checkstyle Linter'
+    runs-on: ubuntu-latest
+    env:
+      CHECKSTYLE_VERSION: '10.25.0'
+      REVIEWDOG_VERSION: latest
+      REVIEWDOG_GITEA_API_TOKEN: cce3e487b7da8f6a98168a066dc5347b7a61f12e
+      GITEA_ADDRESS: http://gitea:3000
+    steps:
+      - name: 'Pull code'
+      - uses: actions/checkoutv6
+      - name: 'Find changed Java files'
+        id: changed-files
+        uses: tj-actions/changed-files@v44
+        with:
+          files: |
+            **.java
+      - name: 'Setup Java JDK'
+        uses: actions/setup-java@v4
+        with:
+          java-version: '22'
+          distribution: 'zulu'
+      - name: 'Setup Reviewdog'
+        uses: reviewdog/action-setup@v1
+        with:
+          reviewdog_version: ${{ env.REVIEWDOG_VERSION }}
+      - name: 'Run Checkstyle with Reviewdog'
+        if: steps.changed-files.outputs.any_changed == 'true'
+        run: |
+          wget wget https://github.com/checkstyle/checkstyle/releases/download/checkstyle-${{ env.CHECKSTYLE_VERSION }}/checkstyle-${{ env.CHECKSTYLE_VERSION }}-all.jar
+          
+          echo "${{ steps.changed-files.outputs.all_changed_files }}"
+
+          java -jar checkstyle-${{ env.CHECKSTYLE_VERSION }}-all.jar -c google_checks.xml -f xml ${{ steps.changed-files.outputs.all_changed_files }} \
+          | reviewdog -f=checkstyle \
+          -name="Checkstyle" \
+          -reporter="gitea-pr-review" \
+          -level="warning" \
+          -fail-on-error="true"

src/main/java/com/softwaresmyth/functions/OrNot.java

@@ -2,8 +2,10 @@ package com.softwaresmyth.functions;
 
 import java.util.Optional;
 
-public class OrNot
+public enum OrNot
 {
+    ; // Enum with no variants for a utility class that is not meant to be instantiated.
+
     public static void noop(Object... ignored)
     {
         //do nothing