How Codemods Turned a Nightmare into a 3-Minute Migration
summary
A real migration case: automated codemods using AST transforms with jscodeshift and recast convert Vibe design system APIs so a release with 70 breaking API changes runs across the repo and finishes in 3 minutes. Team builds per‑component codemods, utility helpers to normalize imports and alias names, comprehensive tests for each transform, and a single CLI command so users upgrade with one line. Result: all changes apply reliably, edge cases mapped, and rollout succeeds without mass breakage.
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chapters (17)
- 0:00Introduction
- 2:33Speaker introduction
- 3:16What is Wave and its challenges
- 5:02The breaking point of Wave
- 6:06What are codemods
- 8:15Why codemods are needed
- 10:01Understanding AST
- 12:13How to write codemods
- 13:58Codemod example
- 16:05Handling edge cases
- 17:52Codemod strategy
- 20:25Creating utility functions
- 22:14Testing codemods
- 23:19CLI for easy migration
- 24:49Migration results
- 25:34Daily use of codemods
- 25:56Conclusion
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