[kpumuk]

The Ruby Makefiles currently let make style finish without running RuboCop. Add style-local hooks in lib/rb, test/rb, and tutorial/rb that run safe autocorrection with rubocop -a. The test and tutorial targets use the shared library configuration; the tutorial uses the library bundle because it has no Gemfile.

This follows Jens's clarification in #3367:

The intention was to do "make style" where it already exists and where it gets added in the future.

With Autotools already configured and the Ruby bundles installed, for example:

$ cd test/rb
$ make style
cd . && bundle exec rubocop -a --config ../../lib/rb/.rubocop.yml
Inspecting 17 files
.................

17 files inspected, no offenses detected

• Did you create an Apache Jira ticket? (Request account here, not required for trivial changes) — Not required for this small build-target addition.
• If a ticket exists: Does your pull request title follow the pattern "THRIFT-NNNN: describe my issue"? — Not applicable.
• Did you squash your changes to a single commit? (not required, but preferred)
• Did you do your best to avoid breaking changes? If one was needed, did you label the Jira ticket with "Breaking-Change"?
• If your change does not involve any code, skip CI to free up build resources. — Not applicable: build rules changed.

[Copilot]

🟡 Changes recommended

The new recipes bypass the configured Bundler executable and fail when it is outside PATH.

1 open issue

• Use configured BUNDLER in style-local recipes · New

What changed in this PR

Connects Ruby formatting to the existing make style workflow.

Changes:

• Adds style-local hooks running RuboCop safe autocorrection.
• Reuses the library configuration for tests and tutorials, and the library bundle for tutorials.

File	Description
tutorial/​rb/​Makefile.am	Runs tutorial formatting through the library bundle.
test/​rb/​Makefile.am	Formats tests using the shared RuboCop configuration.
lib/​rb/​Makefile.am	Adds library formatting with rubocop -a.

_{Review effort: Balanced}

[Copilot]

🟢 Approval recommended

The three narrowly scoped hooks fit the existing style workflow, with no unresolved findings.

No open issues 🎉

1 resolved since last review

• Use configured BUNDLER in style-local recipes

_{Review effort: Balanced}