ci: tee elb output to file; dump on failure in separate step

.gitea/workflows/dev.yaml

@@ -112,23 +112,23 @@ jobs:
 
       - name: Build neuron-web with elb
         run: |
-          set -euo pipefail
-          echo "=== SDK env ==="
-          echo "ELB=$ELB"
-          echo "ELC=$ELC"
-          echo "EL_RUNTIME=$EL_RUNTIME"
-          echo "=== SDK files ==="
+          set -uo pipefail
+          echo "ELB=$ELB  ELC=$ELC  EL_RUNTIME=$EL_RUNTIME"
           ls -la "$ELB" "$ELC"
-          ls -la "$EL_RUNTIME/"
-          echo "=== manifest ==="
-          cat manifest.el
-          echo "=== running elb ==="
-          # stdbuf -oL forces line-buffered stdout so output isn't lost if elb fails.
-          # Without it, println output buffers in the C pipe and evaporates on non-zero exit.
           stdbuf -oL "$ELB" \
             --elc="$ELC" \
-            --runtime="$EL_RUNTIME"
-          echo "Binary: $(ls -lh dist/neuron-landing)"
+            --runtime="$EL_RUNTIME" 2>&1 | tee /tmp/elb.log
+          ELB_EXIT=${PIPESTATUS[0]}
+          if [ "$ELB_EXIT" -eq 0 ]; then
+            echo "Binary: $(ls -lh dist/neuron-landing)"
+          fi
+          exit "$ELB_EXIT"
+
+      - name: Dump full elb output (on failure)
+        if: failure()
+        run: |
+          echo "=== full elb output ==="
+          cat /tmp/elb.log || echo "(no log file)"
 
       # ── Compile JS client sources ─────────────────────────────────────────