Tracing: expose directory path setting as tracing.dir

in rabbitmq.conf.

Note that this does not include any tests because
the test would have to use a writeable directory,
and it is not obvious what kind of cross-platform
path that is not computed programmatically they
could use.

It's a trivial schema file that uses an existing
core validator => let's leave it as is.

(cherry picked from commit 118f1a4)

Author: michaelklishin

deps/rabbitmq_tracing/BUILD.bazel

@@ -1,6 +1,8 @@
 load("@rules_erlang//:eunit2.bzl", "eunit")
 load("@rules_erlang//:xref2.bzl", "xref")
 load("@rules_erlang//:dialyze.bzl", "dialyze", "plt")
+load("//:rabbitmq_home.bzl", "rabbitmq_home")
+load("//:rabbitmq_run.bzl", "rabbitmq_run")
 load(
     "//:rabbitmq.bzl",
     "BROKER_VERSION_REQUIREMENTS_ANY",

deps/rabbitmq_tracing/app.bzl

@@ -82,6 +82,7 @@ def all_srcs(name = "all_srcs"):
     filegroup(
         name = "priv",
         srcs = [
+            "priv/schema/rabbitmq_tracing.schema",
             "priv/www/js/tmpl/traces.ejs",
             "priv/www/js/tracing.js",
         ],

deps/rabbitmq_tracing/priv/schema/rabbitmq_tracing.schema

@@ -0,0 +1,10 @@
+%% This Source Code Form is subject to the terms of the Mozilla Public
+%% License, v. 2.0. If a copy of the MPL was not distributed with this
+%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
+%%
+%% Copyright (c) 2007-2024 Broadcom. All Rights Reserved. The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. All rights reserved.
+%%
+
+{mapping, "tracing.dir", "rabbitmq_tracing.directory", [
+    {datatype, string},
+    {validators, ["dir_writable"]}]}.