From 0067609601cd657f71fb29689f0cfa2fb71bf5cc Mon Sep 17 00:00:00 2001
From: Valentin Lab <valentin.lab@kalysto.org>
Date: Thu, 3 Nov 2022 15:31:03 +0100
Subject: [PATCH] fix: default value for ``constraint`` in relation definition
 of ``metadata.yml`` enforced on empty values.

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>
---
 bin/compose-core | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bin/compose-core b/bin/compose-core
index 7ae5405..d32dac3 100755
--- a/bin/compose-core
+++ b/bin/compose-core
@@ -2611,7 +2611,8 @@ get_all_relations () {
                     return 1
                     ;;
             esac
-            constraint=$(echo "$relation_def" | shyaml get-value constraint optional 2>/dev/null)
+            constraint=$(echo "$relation_def" | shyaml get-value constraint 2>/dev/null)
+            constraint=${constraint:-optional}
             case "$constraint" in
                 "required")
                     required+=("$service" "$relation_name" "$relation_def")