From 0177210321622bd55474ca574c1db8af79029760 Mon Sep 17 00:00:00 2001
From: johnnyshields <27655+johnnyshields@users.noreply.github.com>
Date: Sun, 3 Sep 2023 02:27:41 +0900
Subject: [PATCH] Proof-of-concept for compression warning

---
 docs/reference/create-client.txt | 6 ++++++
 lib/mongo/client.rb              | 7 +++++++
 2 files changed, 13 insertions(+)

diff --git a/docs/reference/create-client.txt b/docs/reference/create-client.txt
index f54805651a..b4ea052380 100644
--- a/docs/reference/create-client.txt
+++ b/docs/reference/create-client.txt
@@ -517,6 +517,12 @@ Ruby Options
      - ``Array<String>``
      - none
 
+   * - ``:warn_compression_disabled``
+     - By default, the driver warns if you have not set the ``:compressors`` option.
+       Set this option ``false`` to silence the warning.
+     - ``true``, ``false``
+     - none
+
    * - ``:connect``
      - **Deprecated.** Disables deployment topology discovery normally
        performed by the dirver and forces the cluster topology to a specific
diff --git a/lib/mongo/client.rb b/lib/mongo/client.rb
index e06231d4ad..8eb43e6dcf 100644
--- a/lib/mongo/client.rb
+++ b/lib/mongo/client.rb
@@ -1353,6 +1353,13 @@ def validate_new_options!(opts)
         end
         _options
       end
+
+      unless !opts[:compressors]&.empty? ||
+             opts[:warn_compression_disabled] == false ||
+             @@warned_compression_disabled
+        log_warn("Compression is disabled. Refer to: https://www.mongodb.com/docs/ruby-driver/current/reference/create-client/#compression. You may silence this warning by setting :warn_compression_disabled = false.")
+        @@warned_compression_disabled = true
+      end
     end
 
     # Validates all options after they are set on the client.