idhub.entrypoint: refactor oidc waiting interval

instead of sleep, waits that all idhubs have wrote its content in
/sharedsecret/ dir

docker/idhub.entrypoint.sh

@@ -35,6 +35,10 @@ deployment_strategy() {
                 # warn admin that it should re-enter password to keep the service working
                 ./manage.py send_mail_admins
         else
+                # this file helps all docker containers to guess number of hosts involved
+                #   right now is only needed by new deployment for oidc
+                touch /sharedsecret/${DOMAIN}
+
                 # move the migrate thing in docker entrypoint
                 #   inspired by https://medium.com/analytics-vidhya/django-with-docker-and-docker-compose-python-part-2-8415976470cc
                 echo "INFO detected NEW deployment"
@@ -60,14 +64,24 @@ _get() {
         sqlite3 -json db.sqlite3 "select * from oidc4vp_organization;"
 }
 
+_lines () {
+        local myfile="${1}"
+        cat "${myfile}" | wc -l
+}
+
 config_oidc4vp() {
         # populate your config
-        local file="${DOMAIN}"
         data="$(_get)"
-        echo "${data}" | jq --arg domain "${DOMAIN}" '{ ($domain): .}' > /sharedsecret/${file}
+        echo "${data}" | jq --arg domain "${DOMAIN}" '{ ($domain): .}' > /sharedsecret/${DOMAIN}
 
+        while true; do
                 echo wait the other idhubs to write, this is the only oportunity to sync with other idhubs in the docker compose
-        sleep 2
+                ## break when no empty files left
+                if ! wc -l /sharedsecret/* | awk '{print $1;}' | grep -qE '^0$'; then
+                        break
+                fi
+                sleep 1
+        done
         # get other configs
         for host in /sharedsecret/*; do
                 # we are flexible on querying for DOMAIN: the first one based on regex