more style/function tweaks

plugins/storage/subcommands/list

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+source "$PLUGIN_CORE_AVAILABLE_PATH/storage/functions"
+source "$PLUGIN_CORE_AVAILABLE_PATH/docker-options/functions"
+
+storage_list_cmd() {
+  local desc="List all bound mounts"
+  local cmd="storage:list"
+  local passed_phases="deploy"
+  [[ ! $2 ]] && dokku_log_fail "storage:list requires an app to list."
+  verify_app_name "$2" && local APP="$2"
+  echo "$APP volume bind-mounts:"
+  get_bind_mounts "$(get_phase_file_path "$passed_phases")"
+}
+
+storage_list_cmd "$@"