Shape up admin install script

sbin/dokku-entrypoint.sh

@@ -2,23 +2,37 @@
 
 set -eu -o pipefail
 
-setup_root_user() {
-    set -eu
+add_user() {
+  set -eu
 
-    if ! grep -q "$ADMIN_USER" /opt/jboss/keycloak/standalone/configuration/keycloak-add-user.json; then
-      if /opt/jboss/keycloak/bin/add-user-keycloak.sh -r master -u "$ADMIN_USER" -p "$ADMIN_PASS"; then
-        echo "=====> root user added"
-      else
-        echo "=====> Failed to add root user"
-        exit 1
-      fi
+  keycloak_add_user_script="/opt/jboss/keycloak/bin/add-user-keycloak.sh"
+
+  if $keycloak_add_user_script -r master -u "$ADMIN_USER" -p "$ADMIN_PASS"; then
+    echo "=====> root user added"
+  else
+    echo "=====> Failed to add root user"
+    exit 1
+  fi
+}
+
+setup_root_user() {
+  set -eu
+
+  keycloak_add_user_json="/opt/jboss/keycloak/standalone/configuration/keycloak-add-user.json"
+
+  if [ ! -f "$keycloak_add_user_json" ]; then
+    add_user
+  else
+    if ! grep -q "$ADMIN_USER" "$keycloak_add_user_json"; then
+      add_user
     fi
+  fi
 }
 
 main() {
-    set -eu
+  set -eu
 
-    setup_root_user
+  setup_root_user
 }
 
 main