Fix actions build

.github/workflows/build.yml

@@ -1,15 +1,41 @@
-name: "build"
-
+name: Build
 on:
   push:
     branches: [ "**" ]
     tags-ignore: [ "**" ]
   pull_request:
-
 jobs:
-  call-build:
-    uses: "jpenilla/actions/.github/workflows/shared-ci.yml@master"
-    with:
-      artifacts-path: 'build/libs/*.jar'
-      loom: true
-      jdk-version: 21
+  build:
+    # Only run on PRs if the source branch is on someone else's repo
+    if: ${{ github.event_name != 'pull_request' || github.repository != github.event.pull_request.head.repo.full_name }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: "checkout git repository"
+        uses: actions/checkout@v4
+      - name: "validate gradle wrapper"
+        uses: gradle/actions/wrapper-validation@v3
+      - name: "setup jdk"
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 21
+      - name: "setup gradle"
+        uses: gradle/actions/setup-gradle@v3
+        # gradle-build-action doesn't support caching files in the project dir
+      - name: "cache project local caches"
+        uses: actions/cache@v4
+        with:
+          path: |
+            .gradle/loom-cache
+          key: ${{ runner.os }}-project-local-gradle-caches-${{ hashFiles('**/libs.versions.toml', '**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-project-local-gradle-caches-
+      - name: "setup concurrentutil"
+        run: ./installConcurrentUtil.sh
+      - name: "execute gradle build"
+        run: ./gradlew build
+      - name: "upload artifacts"
+        uses: actions/upload-artifact@v4
+        with:
+          name: artifacts
+          path: "build/libs/*.jar"