refactor: GitHub Actions build workflow

Author: Technofied

.github/workflows/build.yml

@@ -1,99 +1,58 @@
-name: Build with Gradle
+name: Build
 
 on:
   push:
+    branches: [main, master, develop]   # ignore noise from short-lived feature branches
   pull_request:
   workflow_dispatch:
 
+# Cancel any in-progress run on the same branch/PR when a new one is triggered.
+# This prevents redundant builds piling up while you're actively pushing.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 env:
-  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true   # opt into Node.js 24 ahead of the June 2026 forced migration
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true   # opt into Node.js 24 ahead of June 2026 forced migration
 
 jobs:
   build:
     runs-on: ubuntu-latest
-    outputs:
-      jars: ${{ steps.collect.outputs.jars }}   # JSON array of filenames (basenames)
     permissions:
       contents: read
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up JDK
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: '21'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v4   # v4 supports Node.js 24
+        uses: gradle/actions/setup-gradle@v4
 
       - name: Build
-        run: ./gradlew --no-daemon shadowJar   # gradlew is already executable after checkout
+        run: |
+          chmod +x ./gradlew
+          ./gradlew --no-daemon shadowJar
 
-      - name: Collect runtime JARs (flatten)
+      - name: Collect JARs
         run: |
           mkdir -p jars
-          # collect jars from all subprojects; exclude sources/javadoc/tests/plain
           find . -path "*/build/libs/*.jar" -type f \
             ! -name "*-sources.jar" \
             ! -name "*-javadoc.jar" \
             ! -name "*-tests.jar" \
             ! -name "*-plain.jar" \
             -exec cp {} jars/ \;
 
-      - name: Make list of JAR filenames (JSON)
-        id: collect
-        shell: bash
-        run: |
-          files=()
-          while IFS= read -r -d '' f; do
-            files+=("$(basename "$f")")
-          done < <(find jars -type f -name "*.jar" -print0 | sort -z)
-
-          if [ ${#files[@]} -eq 0 ]; then
-            json='[]'
-          else
-            # Use jq if available for safe JSON construction, otherwise fall back to printf
-            if command -v jq &>/dev/null; then
-              json=$(printf '%s\n' "${files[@]}" | jq -R . | jq -sc .)
-            else
-              printf -v json '[%s]' "$(printf '"%s",' "${files[@]}" | sed 's/,$//')"
-            fi
-          fi
-
-          echo "jars=$json" >> "$GITHUB_OUTPUT"
-
-      - name: Upload temporary combined artifact
-        if: steps.collect.outputs.jars != '[]'
+      - name: Upload JARs
         uses: actions/upload-artifact@v4
         with:
-          name: all-jars
+          name: jars-${{ github.sha }}      # include commit SHA so each run's artifact is uniquely identifiable
           path: jars/*.jar
           if-no-files-found: error
-          retention-days: 1   # only needed as a staging area for upload-each; no need to keep it longer
-
-  upload-each:
-    needs: build
-    if: needs.build.outputs.jars != '[]'
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-    strategy:
-      fail-fast: false
-      matrix:
-        jar: ${{ fromJSON(needs.build.outputs.jars) }}
-    steps:
-      - name: Download combined artifact
-        uses: actions/download-artifact@v4
-        with:
-          name: all-jars
-          path: jars
-
-      - name: Upload ${{ matrix.jar }} as its own artifact
-        uses: actions/upload-artifact@v4
-        with:
-          name: ${{ matrix.jar }}
-          path: jars/${{ matrix.jar }}
-          if-no-files-found: error
           retention-days: 14