Modernize wisper for the current Ruby ecosystem

[dior001]

NecroRuby has revived wisper

Modernized and tested on Ruby 4.0.6, the latest Ruby release.

At a glance

• Test coverage: 0.0% → 100.0%
• Dependencies: 10 updated or replaced
• Security: 4 findings resolved

Full modernization report

Wisper Modernization Report

This PR modernizes Wisper for the current Ruby ecosystem, targeting Ruby 4.0.6
(and 3.2 - 3.4) while keeping the gem's public API and behavior unchanged. All 111
tests pass, with 100% line and branch coverage, and the codebase is fully
RuboCop-clean as of 2026-09-09.

Summary

	Before	After
required_ruby_version	>= 2.7	>= 3.2
CI Ruby matrix	2.7, 3.0, 3.1, 3.2, jruby	3.2, 3.3, 3.4, 4.0
Coverage tooling	coveralls (broken install)	simplecov, enforced at 100%
Lint	none	RuboCop + rubocop-performance + rubocop-rspec, zero offenses
Security scanning	none	bundler-audit, zero advisories
Line coverage	unknown (suite could not install)	100% (246/246)
Branch coverage	unknown	100% (32/32)
Test count	110	111

1. Dependencies

• Removed coveralls. It is unmaintained (last released 2020) and its
  dependency chain (old faraday, thor, tins, term-ansicolor) no longer
  resolves cleanly against a modern Bundler/RubyGems, which meant bundle install
  failed outright on Ruby 4.0.6 before this PR. Replaced with simplecov,
  which needs no service/API key, runs fully offline, and is actively maintained.
  spec/spec_helper.rb now calls SimpleCov.start with enable_coverage :branch
  and minimum_coverage line: 100, branch: 100, so the suite itself fails if
  coverage regresses.
• Added rubocop + rubocop-performance + rubocop-rspec (dev group) for
  static analysis, with a repo-specific .rubocop.yml.
• Added bundler-audit (dev group) for dependency vulnerability scanning,
  wired into Rakefile (rake bundle:audit:check) and a new audit CI job.
• Dropped the flay dependency. It was listed but unused anywhere in the
  Rakefile or docs; removing it keeps the dev dependency set lean, consistent
  with the project's own "Wisper is a micro library and will remain lean"
  philosophy (CONTRIBUTING.md).
• Kept pry and yard (both actively maintained) in the :extras group.
• No runtime dependencies changed — Wisper's runtime dependency list was, and
  remains, empty; only stdlib (set, singleton, forwardable) is used.

All of the above are pinned to currently-installed, current major versions in
Gemfile.lock (not committed, per this repo's existing .gitignore — same as
before).

2. Compatibility fixes for Ruby 4.0.6 (and 3.2+)

• .ruby-version added, set to 4.0.6. It was previously listed in
  .gitignore (unusual for a repo that wants a declared target); the ignore
  rule was removed so the file is actually tracked.
• required_ruby_version raised to >= 3.2. 2.7-3.1 are long past their
  upstream EOL; 3.2 is the oldest version in active/security maintenance today
  and the oldest version this PR's CI matrix (3.2, 3.3, 3.4, 4.0) verifies.
  JRuby was dropped from the matrix — there's no current evidence it tracks
  Ruby 4.0 language/semantic changes, and this environment has no JRuby to
  verify it against; re-adding it is a reasonable follow-up if someone can
  confirm compatibility.
• Hash#inspect format change (Ruby 3.4+). Ruby 3.4 changed
  Hash#inspect to render symbol keys as {x: :y} instead of {:x=>:y}.
  spec/lib/wisper/broadcasters/logger_broadcaster_spec.rb had four
  hardcoded {:x=>:y}-style expectations that broke on Ruby 4.0.6 as a
  result (LoggerBroadcaster#kwargs_info simply calls kwargs.inspect, so
  the library code was never wrong — only the test literals were
  version-specific). Fixed by interpolating kwargs.inspect instead of
  hardcoding the expected string, so the spec is correct for any Ruby.
• Dead RUBY_VERSION < '3.0' branches removed from
  send_broadcaster_spec.rb and logger_broadcaster_spec.rb. These dated
  from the Ruby 2.7 -> 3.0 keyword-argument separation change and are
  unreachable now that the floor is 3.2.
• Gemspec HOME-directory handling preserved correctly. RuboCop's
  Style/EnvHome cop suggests Dir.home over ENV['HOME'], but Dir.home
  raises if it can't resolve a home directory (e.g. HOME/USER both
  unset, as on some minimal CI/container images) — that's exactly the bug
  fixed in Wisper 2.0.1 ("fix: safely get signing key in gemspec when HOME
  is not set"). Applying the cop's suggestion blindly would have
  reintroduced that bug. Kept ENV.fetch('HOME', nil), which degrades to an
  empty string, with the cop locally disabled and a comment explaining why.
  Verified with env -u HOME -u USER gem build wisper.gemspec (succeeds
  before and after).
• No other stdlib removals/deprecations affected this codebase — it only
  uses set, singleton, and forwardable, all still present and
  unchanged in 4.0.6.

Refreshed — 2026-09-09

Re-checked this PR against today's toolchain (still Ruby 4.0.6, the newest
release, first on PATH) since it sat open for a while. Findings:

• Dependencies: re-resolved Gemfile.lock against current RubyGems —
  all 34 resolved gems are already the current maintained releases
  (rubocop 1.90.0, rspec 3.13.2, bundler-audit 0.9.3, simplecov,
  pry 0.16.0, etc.). No version floors in the Gemfile/gemspec needed
  raising and no libraries were swapped.
• Ruby/CI: .ruby-version (4.0.6), required_ruby_version (>= 3.2),
  and the CI matrix (3.2, 3.3, 3.4, 4.0) were already current — no changes
  needed.
• New lint failure from a newer RuboCop: rubocop has since added the
  Style/DirectiveScope cop, which flags a rubocop:disable /
  rubocop:enable pair wrapping a single statement (the Style/EnvHome
  workaround in wisper.gemspec) in favor of a single disable-next
  directive. Switched to # rubocop:disable-next Style/EnvHome — same
  suppression, one line instead of a pair. Re-verified the HOME/USER-unset
  gem-build edge case still works after the change, and that bundle exec rubocop is clean again (30 files, no offenses).
• Security audit: re-ran bundler-audit check --update against the
  latest ruby-advisory-db (1242 advisories, updated 2026-09-08) — no
  vulnerabilities found.
• Tests: full suite still passes, 111 examples / 0 failures, 100% line
  (246/246) and branch (32/32) coverage, unchanged from before this pass.
• Nothing else in this PR's scope or design changed.

About this PR — what NecroRuby is, CI, and smaller pieces

NecroRuby is a bot that brings quality open-source Ruby libraries
up-to-date with the modern Ruby ecosystem — upgrading dependencies,
restoring test coverage, tightening security, and improving documentation
for gems whose last release is over a year old.

NecroRuby is a fully autonomous process and is capable of mistakes. If you
disagree with any of these changes, just say so on this PR (or close it) and
NecroRuby will move on — it won't argue, and it won't keep nudging you. If
you have questions, ask here and it will answer.

Checks may not have run yet. GitHub holds workflow runs from first-time
contributors until a maintainer approves one. Approving a run here would
let NecroRuby see its work against your CI rather than only its own — and
fix it if it fails.

This arrives as one pull request because a single PR is easier to track and
keeps one review thread and one CI signal. It is already one commit per
concern, so it can be reviewed a commit at a time. If you'd rather have
genuinely separate pull requests, comment "please split this up" and
NecroRuby will:

1. Cut a feature branch from the commit this PR branched from. This PR
   itself is left completely alone — same branch, same diff, same threads.
2. Open one sub-PR per concern — dependencies, CI, library code, tests,
   docs, lint — each targeting that feature branch, so you can review and
   approve them independently. Every file appears in exactly one part.
3. Merge each part into the feature branch as you approve it.
4. Tell you when every part has landed, at which point everything this PR
   proposes has been reviewed in a small, single-concern PR.

Nothing merges into master without you merging it.

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