Additional changes for 5.0 (Ruby 4 support) branch #566
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# Conflicts: # CHANGELOG.md
- restored notes and one change that got dropped in rebasing - split out the changelog to include 4.12 release we haven't done yet
etagwerker
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Jan 27, 2026
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@faisal Looks good, thank you! 💯
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* Changes needed for Ruby 4.0.0 * Test with Ruby 4.0 too * Patch FakeFS * Add a note about Ruby 4.0 * Apply patch by @faisal * Remove irb and bump dependency on fakefs * undef :path * Additional changes for 5.0 (Ruby 4 support) branch (#566) * Update version, and version compatibility, for 5.0 release. * run mdl with Ruby 4 # Conflicts: # CHANGELOG.md * Fixed up changelog - restored notes and one change that got dropped in rebasing - split out the changelog to include 4.12 release we haven't done yet * Require ostruct, because Ruby 4.0 no longer bundles it. * [CHANGE] Update byebug dependency, for Ruby 4.0 compatibility fixes * Small fix to avoid unnecessary strictness in comparison --------- Co-authored-by: Faisal N Jawdat <faisal@users.noreply.github.com>
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This PR contains a number of changes on top of when we last touched the 5.0 branch:
It updates the version, and it updates the version compatibility matrix in README.md (to match what we already have in the 4.12.0 release)
It runs mdl in CI using Ruby 4 (which we'd had in the past but dropped in branch shuffles)
It moves ostruct from the development dependencies to the runtime dependencies because Ruby 4 drops ostruct.
It updates the byebug dependency to a version with fixes with Ruby 4 support.
Minor changelog weaks beyond just adding the above
Add an entry to the changelog
Squash all commits into a single one
Describe your PR, link issues, etc.
This is kind of a mess and we'll need to clean up the final PR, but we had that problem anyway.