Matrix server build jobs (#7257)

.github/workflows/server_build.yml

@@ -39,6 +39,7 @@ jobs:
     outputs:
       eagle: ${{ steps.filter.outputs.eagle }}
       shardok: ${{ steps.filter.outputs.shardok }}
+      build_matrix: ${{ steps.filter.outputs.build_matrix }}
     steps:
       - name: Detect changed server areas
         id: filter
@@ -97,11 +98,29 @@ jobs:
             core.info(`Run Shardok build: ${shardok}`);
             core.setOutput('eagle', String(eagle));
             core.setOutput('shardok', String(shardok));
+            const include = [];
+            if (eagle) {
+              include.push({
+                name: 'Eagle server',
+                command: './scripts/build_eagle_ci.sh',
+              });
+            }
+            if (shardok) {
+              include.push({
+                name: 'Shardok server',
+                command: './scripts/build_shardok_ci.sh',
+              });
+            }
+            core.setOutput('build_matrix', JSON.stringify({include}));
 
-  eagle-build:
+  server-build:
+    name: Build ${{ matrix.name }}
     needs: changes
-    if: needs.changes.outputs.eagle == 'true'
+    if: needs.changes.outputs.build_matrix != '{"include":[]}'
     runs-on: [self-hosted, bazel]
+    strategy:
+      fail-fast: false
+      matrix: ${{ fromJSON(needs.changes.outputs.build_matrix) }}
 
     steps:
       - name: Ensure Git LFS available for checkout
@@ -128,38 +147,5 @@ jobs:
           lfs: false
       - name: Setup Bazel
         uses: ./.github/actions/setup-bazel
-      - name: Build Eagle server
-        run: ./scripts/build_eagle_ci.sh
-
-  shardok-build:
-    needs: changes
-    if: needs.changes.outputs.shardok == 'true'
-    runs-on: [self-hosted, bazel]
-
-    steps:
-      - name: Ensure Git LFS available for checkout
-        run: |
-          COMMON_PATHS=(/opt/homebrew/bin /usr/local/bin)
-          for path in "${COMMON_PATHS[@]}"; do
-            if [ -d "$path" ]; then
-              echo "$path" >> "$GITHUB_PATH"
-              export PATH="$path:$PATH"
-            fi
-          done
-
-          if command -v git-lfs >/dev/null 2>&1; then
-            git-lfs version
-            exit 0
-          fi
-
-          brew install git-lfs
-          git-lfs version
-      - name: Checkout repository
-        uses: actions/checkout@v6
-        with:
-          persist-credentials: false
-          lfs: false
-      - name: Setup Bazel
-        uses: ./.github/actions/setup-bazel
-      - name: Build Shardok server
-        run: ./scripts/build_shardok_ci.sh
+      - name: Build server
+        run: ${{ matrix.command }}