How to Break into Reading Open Source
summary
Shows two reading modes — ahead-of-time and just-in-time — and uses GitHub and bundle open to inspect gems, noting ~180,000 Ruby gems exist. Points to minitest’s ~1,200-line core and how a composite reporter reveals polymorphism by simply looping and calling record. Reproduces a real bug: audited gem tries to YAML-serialize action_text RichText content, Psych raises DisallowedClass, and tracing action_text’s load/dump/to_html reveals the serialization mismatch to fix.
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chapters (7)
- 0:00Introduction
- 1:13Reading modes
- 4:01Reading ahead
- 8:54Principles for reading
- 15:18Polymorphism in MiniTest
- 19:10Debugging with JIT reading
- 26:52Summary
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