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2025-11-20-4.0.0.beta1-released.md

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title 4.0.0.beta1 Released
layout post
author Hiroshi SHIBATA
author_email hsbt@ruby-lang.org

RubyGems 4.0.0.beta1 includes security, breaking changes, deprecations, features, performance, enhancements and documentation.

To update to the latest RubyGems you can run:

gem update --system

To install RubyGems by hand see the Download RubyGems page.

Security:

  • Bump up vendored URI to 1.0.4. Pull request #9031 by hsbt

Breaking changes:

  • Removed deprecated -C option from gem build. Pull request #9088 by hsbt
  • Removed deprecated Gem::Specification#has_rdoc, has_rdoc= and has_rdoc?. Pull request #9084 by hsbt
  • Removed deprecated gem query command. Pull request #9083 by hsbt
  • Removed deprecated Gem::DependencyInstaller#find_gems_with_sources. Pull request #9082 by hsbt
  • Remove deprecated methods of RubyGems. Pull request #9081 by hsbt
  • Make verification methods private. Pull request #9051 by tenderlove
  • Deprecate --default option from install command. Pull request #7588 by hsbt
  • Switch to 4.0.0.dev in development version. Pull request #9002 by hsbt
  • Removed compatibility.rb for RG 4.0. Pull request #8899 by hsbt

Deprecations:

  • Deprecate Gem::Specification#datadir. Pull request #8900 by hsbt

Features:

  • Undeprecate Gem::Version.new(nil). Pull request #9086 by tenderlove
  • Add pattern matching support to Gem::NameTuple. Pull request #9064 by baweaver
  • Add pattern matching support to Gem::Platform. Pull request #9062 by baweaver

Performance:

  • Remove some memoization. Pull request #9017 by tenderlove
  • Pull Gem.win_platform? out of a hot path. Pull request #8983 by tenderlove
  • Stop trying to remove every file on extraction. Pull request #8974 by tenderlove
  • Use IO.copy_stream with IO object directly. Pull request #8970 by tenderlove
  • Pass a file size to IO.copy_stream. Pull request #8966 by tenderlove
  • Use File#chmod rather than FileUtils.chmod. Pull request #8965 by tenderlove

Enhancements:

  • Update all vendored libraries to latest version. Pull request #9089 by hsbt
  • Removed unused Gem::Deprecate. Pull request #9090 by hsbt
  • Test all tests of make test-all by ruby core. Pull request #9075 by hsbt
  • Add debug logging information to see the time it took to download and install a gem. Pull request #9066 by Edouard-chin
  • Use assert_ractor for testing Ractor. Pull request #9069 by hsbt
  • Fix constants in TAR to be frozen. Pull request #9041 by tenderlove
  • Remove open-ended and prerelease dependency warnings when building gems. Pull request #9050 by jeremyevans
  • Revamp CmakeBuilder. Pull request #8753 by cfis
  • Restrict what schemes are acceptable in the remote fetcher. Pull request #9022 by tenderlove
  • Don't fail if there is no makefile, simply don't do anything. Pull request #8879 by ioquatix
  • Installs bundler 4.0.0.beta1 as a default gem.

Documentation:

  • [DOC] Fix the location of Gem::Deprecate document. Pull request #9065 by nobu
  • Fix typo. Pull request #9012 by etiennebarrie

SHA256 Checksums:

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  • rubygems-4.0.0.beta1.zip
    3843fa0a72cbdfb7c4997ac3ef21bf5aeda7deca2bde00633109f90530692d98
  • rubygems-update-4.0.0.beta1.gem
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