From 1ff8dc18df766d2bd9cd5eec60ac3e8739fc7a41 Mon Sep 17 00:00:00 2001
From: Leendert de Borst <ldeborst@xivisoft.com>
Date: Sun, 14 Jun 2026 14:12:52 +0200
Subject: [PATCH] Update docker-build.yml

---
 .github/workflows/docker-build.yml | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/docker-build.yml b/.github/workflows/docker-build.yml
index 587d85199..6e2d4ed92 100644
--- a/.github/workflows/docker-build.yml
+++ b/.github/workflows/docker-build.yml
@@ -278,9 +278,10 @@ jobs:
           echo "✅ db-export produced a non-empty backup ($(du -h /tmp/backup.sql.gz | cut -f1))"
 
           # Verify the gzip stream is valid and contains a recognizable pg_dump header.
-          if ! gunzip -c /tmp/backup.sql.gz | head -n 30 | grep -q "PostgreSQL database dump"; then
+          dump=$(gunzip -c /tmp/backup.sql.gz)
+          if ! printf '%s\n' "$dump" | head -n 30 | grep -q "PostgreSQL database dump"; then
             echo "❌ Backup does not look like a valid pg_dump output"
-            gunzip -c /tmp/backup.sql.gz | head -n 30
+            printf '%s\n' "$dump" | head -n 30
             exit 1
           fi
           echo "✅ Backup contains a valid pg_dump header"