ruby : ignore "Downloading" output in test_log_suppress

[danbev]

This commit adds a temporary fix to the test_log_suppress test in the Ruby bindings.

The motivation for this changes is that I suspect that the recent migration of the models to HuggingFace Xet has changed the way HTTP caching works for the models. This is causing the test in question to fail. This is a temporary fix so that CI is not broken while we investigate this further.

---

This is a temporary fix as I'm out today (public holiday) but I'll take a closer look at this tomorrow.

Example of failure:
https://github.com/ggml-org/whisper.cpp/actions/runs/14761084015/job/41466717129?pr=3103

[KitaitiMakoto]

By quick and rough investigation, I guess this is caused because Hugging Face has become not to support HTTP if-modified-since field. Ruby bindings downloads model file and output "Downloading" and dots(".") for every access to the model when the response is not 304 Not Modified.

If the end of support for if-modified-since is permanent, we need stop the check via HTTP and just check if cache of model file.

[KitaitiMakoto]

@danbev
This should fix the problem temporarily.

diff --git a/bindings/ruby/lib/whisper/model/uri.rb b/bindings/ruby/lib/whisper/model/uri.rb
index 47c23c52..5ffb07ef 100644
--- a/bindings/ruby/lib/whisper/model/uri.rb
+++ b/bindings/ruby/lib/whisper/model/uri.rb
@@ -41,6 +41,12 @@ module Whisper
 
       def cache
         path = cache_path
+
+        # 2025-05
+        # Hugging Face seems to stop support for if-modified-since
+        # So we cannot use it to check if cache file is fresh or not
+        return path if path.exist?
+
         headers = {}
         headers["if-modified-since"] = path.mtime.httpdate if path.exist?
         request @uri, headers

[KitaitiMakoto]

This seems purely Ruby-related problem. I'll take over investigation and fixing. Merge your temporary fix and enjoy you holiday!

[ggerganov]

Ok, merging this for now and feel free to open an alternative fix if needed.