• Stream TestMap#dump to bound peak RSS on large mappings (#18)

• Skip already-graphed files in StaticMap#build — batched build calls no longer re-parse shared dependency files (#17)

What's Changed

TestMap — test mapping serialization and aggregation

New FastCov::TestMap brings the full test mapping pipeline into fast_cov:

• TestMap.new — In-memory accumulator with add, dependencies, dump
• TestMap.aggregate — K-way merge of fragment files from multiple CI nodes
  • Pure Ruby (no shell commands like gunzip or sort)
  • Event hooks: :sort, :sorted, :merge, :merged
  • Batched each(batch_size) yields Hash of { file => [deps] }
  • Auto-detects max readers from OS file descriptor limit
• TestMap::Reader — Sorted file reader with consecutive duplicate merging
• Tab-delimited gzipped fragment format

# Write
test_map = FastCov::TestMap.new
test_map.add("spec/models/" => coverage_map.stop)
test_map.dump("tmp/test_mapping.node_0.gz")

# Aggregate
aggregator = FastCov::TestMap.aggregate(Dir["tmp/test_mapping.*.gz"])
aggregator.on(:merged) { |files, elapsed| puts "Merged #{files} files in #{elapsed.round(2)}s" }
aggregator.each(10_000) { |batch| database.bulk_write(batch) }

Other changes

• Updated README with full API documentation
• Fixed Ruby requirement in README (3.2.0, not 3.4.0)

What's Changed

• Add FixtureKitTracker: Tracks fixture_kit fixture definition files and their dependencies using callback hooks (requires fixture_kit >= 0.14.0):
  • on_cache_save/on_cache_saved: Tracks files touched during fixture generation and creates connected dependencies
  • on_cache_mount: Records fixture definition files (including parent chain) when tests mount fixtures
• Expose coverage_map via attr_reader on AbstractTracker
• Use gem method for dependency version checks in FactoryBotTracker and FixtureKitTracker

What's Changed

• Fix caller resolution for indirect file reads: Trackers now walk the caller stack to find the first in-root frame, fixing connected dependencies for indirect reads (e.g., YAML.load_file → File.open where the immediate caller is stdlib/gem code outside the project root)
• Add YAML patch to FileTracker: Directly patches YAML.load_file, YAML.safe_load_file, and YAML.unsafe_load_file to handle Bootsnap's compile cache which bypasses File.open entirely
• Move Utils.path_within? and Utils.relativize_paths from C to Ruby: Only used in non-hot paths; the C internal functions remain for the line event callback
• Simplify AbstractTracker.record API: Takes an explicit path instead of a block, auto-resolves caller source via Utils.resolve_caller
• Add Utils.resolve_caller: Walks caller locations to find the first frame within the project root

What's Changed

• Add StaticMap for static dependency mapping by @ngan in #13

Full Changelog: v0.2.0...v0.3.0

Full Changelog: v0.2.0...v0.2.1

What's Changed

• Remove constant_references from CoverageTracker by @ngan in #9
• Refactor coverage orchestration around CoverageMap by @ngan in #11
• Learn connected dependencies across coverage runs by @ngan in #12

Full Changelog: v0.1.6...v0.2.0

What's Changed

• [RETIRE-2799] reduce ruby version dep by @davidjairala in #8

New Contributors

• @davidjairala made their first contribution in #8

Full Changelog: v0.1.5...v0.1.6

What's Changed

New Features

• ConstGetTracker - New tracker that intercepts Module#const_get calls to track dynamic constant lookups
• Pathname support - config.root and config.ignored_path now accept Pathname objects directly (e.g., Rails.root)

Improvements

• Path validations - Root must be an absolute path; ignored_path must be inside root
• Autoload - Use Ruby's autoload for lazy loading of constants
• Code organization - Extract singleton methods into FastCov::Singleton module
• AbstractTracker.record - Support lazy block evaluation to avoid expensive work when tracker is inactive