fix(deploy): preserve rollback diagnostics

scripts/deploy-community.sh

@@ -26,11 +26,6 @@ compose_profiles=""
 if [ "$cache_backend" = "valkey" ] || [ "$cache_backend" = "redis" ]; then
     compose_profiles="--profile cache"
 fi
-postgres_scale=""
-if [ "$(env_value POSTGRES_HOST postgres)" != "postgres" ]; then
-    postgres_scale="--scale postgres=0"
-fi
-
 compose() {
     # Intentional word splitting: compose_profiles is either empty or two arguments.
     # shellcheck disable=SC2086
@@ -38,11 +33,21 @@ compose() {
 }
 
 compose_up() {
+    postgres_scale=""
+    if [ "$(env_value POSTGRES_HOST postgres)" != "postgres" ] \
+        && compose config --services | grep -Fxq postgres; then
+        postgres_scale="--scale postgres=0"
+    fi
     # Intentional word splitting: postgres_scale is either empty or two arguments.
     # shellcheck disable=SC2086
     compose up -d --remove-orphans $postgres_scale
 }
 
+show_failure_diagnostics() {
+    compose ps >&2 || true
+    compose logs --no-color migrate >&2 || true
+}
+
 wait_for_stack() {
     readiness_path="$1"
     attempt=1
@@ -129,10 +134,6 @@ rollback() {
     if [ "$cache_backend" = "valkey" ] || [ "$cache_backend" = "redis" ]; then
         compose_profiles="--profile cache"
     fi
-    postgres_scale=""
-    if [ "$(env_value POSTGRES_HOST postgres)" != "postgres" ]; then
-        postgres_scale="--scale postgres=0"
-    fi
     compose_up
     wait_for_stack health
 }
@@ -142,7 +143,7 @@ create_backup
 compose pull
 
 if ! compose_up || ! wait_for_stack ready; then
-    compose ps >&2 || true
+    show_failure_diagnostics
     rollback
     exit 1
 fi

scripts/restore-community.sh

@@ -28,15 +28,16 @@ compose_profiles=""
 if [ "$cache_backend" = "valkey" ] || [ "$cache_backend" = "redis" ]; then
     compose_profiles="--profile cache"
 fi
-postgres_scale=""
-if [ "$(env_value POSTGRES_HOST postgres)" != "postgres" ]; then
-    postgres_scale="--scale postgres=0"
-fi
 compose() {
     # shellcheck disable=SC2086
     docker compose $compose_profiles "$@"
 }
 compose_up() {
+    postgres_scale=""
+    if [ "$(env_value POSTGRES_HOST postgres)" != "postgres" ] \
+        && compose config --services | grep -Fxq postgres; then
+        postgres_scale="--scale postgres=0"
+    fi
     # shellcheck disable=SC2086
     compose up -d --remove-orphans $postgres_scale
 }