ast-merge v4.0.3 released!

4.0.3 - 2026-01-19

• TAG: v4.0.3
• COVERAGE: 97.30% – 2739/2815 lines in 53 files
• BRANCH COVERAGE: 89.84% – 893/994 branches in 53 files
• 98.81% documented

Added

• Ast::Merge::RSpec::MergeGemRegistry.register_known_gems: Selective registration of known merge gems for RSpec dependency tags
  • Allows test suites to explicitly register only the merge gems they need, avoiding overhead of registering all known gems
  • Usage in spec/config/tree_haver.rb: MergeGemRegistry.register_known_gems(:prism_merge, :commonmarker_merge)
  • Enables proper RSpec tag-based test skipping for optional merge gem dependencies
  • Example: Tests tagged with :prism_merge are automatically skipped when prism-merge isn’t available

Changed

• Upgrade to tree_haver v5.0.2
• RSpec dependency tag load order pattern: Merge gems now load tree_haver and dependency tags early via spec/config/tree_haver.rb
  • Ensures TreeHaver::RSpec::DependencyTags is loaded before gems register themselves
  • Pattern: Load tree_haver/rspec → Load ast/merge/rspec → Register known gems → Load library
  • Applied to markdown-merge and markly-merge; other merge gems should follow this pattern

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