Write CLI applications with Node.js like it’s 2023
summary
A working DALL·E CLI that takes a positional prompt plus --size and --target options calls the OpenAI SDK, returns either a URL or saves a base64 image file, and shows a spinner; code uses node's parseArgs for structured args, Zod for schema validation, readline/promises and a select UI library for interactivity. Tests run with the built-in Node test runner against a fake OpenAI server as true end‑to‑end runs that execute the real binary in isolated temp dirs. Binaries are produced by transpiling ESM→CJS and injecting the app into node-c single executable, and rich UIs are possible via Ink and Pastel.
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chapters (15)
- 0:00Introduction to CLI development
- 1:50Limitations of traditional CLIs
- 3:14Modern Node.js CLI capabilities
- 4:58Parsing command arguments
- 6:01Validating user input
- 7:25Adding interactivity
- 8:49Advanced interactive UIs
- 9:54Single executable applications
- 11:04Live demo of a CLI
- 14:39Testing CLI applications
- 19:01Creating binary executables
- 22:13Building CLIs with React
- 24:47Introducing Pastel framework
- 25:30Live demo of Pastel CLI
- 29:44Summary and closing
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