new: [apache] default value for ``ssl``, is first cert-provider if any.

apache/lib/common

@@ -72,6 +72,22 @@ is_protocol_enabled() {
 export -f is_protocol_enabled
 
 
+_get_ssl_option_value() {
+    local target_relation rn ts rc td
+    relation-get ssl 2>/dev/null && return 0
+
+    target_relation="cert-provider"
+    while read-0 rn ts rc td; do
+        [ "$rn" == "${target_relation}" ] || continue
+        info "A cert-provider '$ts' declared as 'ssl' value"
+        echo "$ts"
+        return 0
+    done < <(get_service_relations "$SERVICE_NAME")
+
+    return 1
+}
+
+
 __vhost_cfg_normalize_protocol() {
     local protocol
 
@@ -83,7 +99,7 @@ __vhost_cfg_normalize_protocol() {
 
     case "$protocol" in
         auto)
-            if __vhost_cfg_ssl="$(relation-get ssl 2>/dev/null)"; then
+            if __vhost_cfg_ssl="$(_get_ssl_option_value)"; then
                 protocol="https"
                 export __vhost_cfg_ssl
             else
@@ -114,7 +130,8 @@ __vhost_cfg_normalize_protocol() {
 
 ssl_get_plugin_fun() {
     # from ssl conf, return the function that should manage SSL code creation
-    local cfg="$(relation-get ssl 2>/dev/null)" type keys
+    local cfg type keys
+    cfg=$(_get_ssl_option_value)
     if [ -z "$cfg" ]; then
         return 0
     else
@@ -150,7 +167,7 @@ ssl_get_plugin_fun() {
                 merged_config=$(merge_yaml_str "$relation_config" "$ssl_cfg") || return 1
                 printf "%s\0" "$fun" "$key" "$merged_config"
                 return 0
-            done < <(get_compose_relations "$SERVICE_NAME") || return 1
+            done < <(get_service_relations "$SERVICE_NAME") || return 1
             case "$key" in
                 cert|ca-cert|key)
                     :
@@ -271,7 +288,7 @@ apache_vhost_statement() {
         __vhost_full_vhost_statement http
     fi
     if is_protocol_enabled https; then
-        "$SSL_PLUGIN_FUN"_vars "$(relation-get ssl 2>/dev/null)"
+        "$SSL_PLUGIN_FUN"_vars "$(_get_ssl_option_value 2>/dev/null)"
         cat <<EOF
 
 <IfModule mod_ssl.c>

apache/test/vhost_cert_provider

@@ -24,11 +24,10 @@ relation-get() {
 }
 export -f relation-get
 
-get_compose_relations() {
-    local service="$1"
+get_service_relations() {
     printf "%s\0" "${RELATIONS[@]}"
 }
-export -f get_compose_relations
+export -f get_service_relations
 
 merge_yaml_str() {
     printf "<merge_yaml_str("

apache/test/vhost_files

@@ -22,6 +22,10 @@ relation-get() {
 }
 export -f relation-get
 
+get_service_relations() {
+    printf "%s\0" "${RELATIONS[@]}"
+}
+export -f get_service_relations
 
 file_put() {
     echo "file_put $1"