Crafting Fully Custom Code Generators
summary
Custom Elixir generators take an Elixir input file (keyword lists or structs), run a preprocessing digestor that pulls from legacy source code, an Oracle schema, and human notes, then use a mix task to evaluate EEx templates plus helper modules to emit migrations, schemas, tests, LiveView files and factory snippets. The workflow uses mix generator.create_file, runs the formatter, iterates in a temp dir to avoid compile breaks, and doubles test coverage in the demo—generators work and save time.
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chapters (12)
- 0:00Introduction
- 1:04Why build generators
- 3:53Phoenix generator challenges
- 7:25Arcane Assist demo
- 8:52Generator in action
- 11:00Core components
- 13:25Helper modules
- 15:31Mix task details
- 17:20EEx template magic
- 18:45Maintainable generators
- 21:15Avoid over-engineering
- 23:41Future improvements
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