v4.0.12

Enhancements:

• Remove cygwin from WIN_PATTERNS. Pull request #9527 by fd00
• Installs bundler 4.0.12 as a default gem.

Bug fixes:

• Fall back to lockfile version when BUNDLE_VERSION is "lockfile". Pull request #9545 by hsbt
• Read BUNDLE_VERSION env var in BundlerVersionFinder. Pull request #9538 by hsbt

bundler-v4.0.12

Enhancements:

• Make bundle config get return status 1 when the value is not set. Pull request #9505 by willnet
• Use Pathname#absolute?. Pull request #9529 by nobu
• Deprecate parsing non-lockfile content in LockfileParser. Pull request #9502 by kurotaky
• Print a warning for a potential confusion from the indirect dependencies. Pull request #5029 by junaruga
• Respect Gemfile bundler setting in Bundler.setup. Pull request #4892 by godfat

Bug fixes:

• Gracefully handle missing checksums in Compact Index. Pull request #9492 by jneen
• Skip git source exclusion when lockfile cannot backfill. Pull request #9544 by yahonda
• Fix bundle config gemfile unset behavior. Pull request #9514 by afurm

v4.0.11

Enhancements:

• Add commented-out rubygems_mfa_required to bundle gem template. Pull request #9487 by MatheusRich
• Clarify the name and meaning of the first argument to gem spec. Pull request #9476 by eregon
• Installs bundler 4.0.11 as a default gem.

bundler-v4.0.11

Enhancements:

• Update gem creation guide URL to rubygems.org. Pull request #9500 by nissyi-gh
• Lock the checksum of Bundler itself in the lockfile. Pull request #9366 by Edouard-chin

Bug fixes:

• Fix installing gems with native extensions + transitive dependencies. Pull request #9477 by nicholasdower
• Fix the bundler version not being updated in dev/test lockfile. Pull request #9463 by Edouard-chin
• Ensure the release CI doesn't break due to the Bundler checksum feature. Pull request #9436 by Edouard-chin

Documentation:

• Fix formatting for BUNDLE_PREFER_PATCH variable in man page. Pull request #9474 by toy

bundler-v4.0.10

Enhancements:

• Ignore warnings with spec different platforms. Pull request #8508 by hsbt
• Improve error message when current platform is not in lockfile. Pull request #9439 by 55728
• Cache package version selection. Pull request #9410 by Edouard-chin
• Check happy path first when comparing gem version. Pull request #9417 by Edouard-chin
• [feature] default_cli_command for config what command bundler runs when no specific command is provided. Pull request #8886 by jonbarlo
• Introduce a fast path for comparing Gem::Version. Pull request #9414 by Edouard-chin

Bug fixes:

• Restore rb_sys dependency for Rust. Pull request #9416 by bangseongbeom

v4.0.10

Enhancements:

• Ignore warnings with spec different platforms. Pull request #8508 by hsbt
• Better algorithm for sorting gem version. Pull request #9421 by Edouard-chin
• Update SPDX license list as of 2026-02-20. Pull request #9434 by hsbt
• Installs bundler 4.0.10 as a default gem.

Bug fixes:

• Register native extension files in default spec map. Pull request #9431 by hsbt
• Fix NoMethodError in Gem.try_activate when activation conflicts occur. Pull request #9404 by hsbt

v4.0.9

Enhancements:

• Fix: include owner role in gem owner. Pull request #9403 by gjtorikian
• Installs bundler 4.0.9 as a default gem.

Bug fixes:

• Fix: Ensure trailing slash is added to source URIs added via gem sources. Pull request #9055 by zirni

Documentation:

• [DOC] Fix link. Pull request #9409 by BurdetteLamar

bundler-v4.0.9

Enhancements:

• Check the git version only once per bundle install. Pull request #9406 by Edouard-chin
• Normalize the number of workers when performing parallel operations. Pull request #9400 by Edouard-chin
• Add exponential backoff to bundler retries. Pull request #9163 by ChrisBr
• Introduce a priority queue. Pull request #9389 by Edouard-chin
• Split the download and install process of a gem. Pull request #9381 by Edouard-chin

Bug fixes:

• Retry git fetch without --depth for dumb HTTP transport. Pull request #9405 by hsbt

v4.0.8

Enhancements:

• Use JSON for cargo metadata parsing. Pull request
  #9373 by hsbt
• Fix NameError in Gem::Request.get_proxy_from_env when requiring
  rubygems/request directly. Pull request
  #9362 by afurm
• Installs bundler 4.0.8 as a default gem.

Documentation:

• Unify Compact Index API naming. Pull request
  #9372 by simi

bundler-v4.0.8

Enhancements:

• Add a new Bundler config to control how many specs are fetched #9363
• Restrict GitHub Actions workflow permissions for newgem #9361

Bug fixes:

• Fix plugin new version not registering #9355