Show HN: Monocle – bidirectional code generation library

• ts-lite

  1 48 0.0 JavaScript

  Compiled TypeScript. Generates Go, Swift, Kotlin, WASM, Binary

  

This is neat! I’m curious if you see this being extended for other languages, or the concept being applied in other projects?

As for similar concepts, several projects by builder.io have some overlap. Most notably Mitosis[1], but I’d be shocked if TS-Lite[2] isn’t using similar techniques. Potentially Qwik[3] as well but I’m not sure, I would have bet that’s using Mitosis but it looks like that’s the other way around.

1: https://github.com/BuilderIO/mitosis

2: https://github.com/BuilderIO/ts-lite/tree/main/packages/core

3: https://github.com/BuilderIO/qwik

• qwik

  132 20,194 9.9 TypeScript

  Instant-loading web apps, without effort

  

This is neat! I’m curious if you see this being extended for other languages, or the concept being applied in other projects?

As for similar concepts, several projects by builder.io have some overlap. Most notably Mitosis[1], but I’d be shocked if TS-Lite[2] isn’t using similar techniques. Potentially Qwik[3] as well but I’m not sure, I would have bet that’s using Mitosis but it looks like that’s the other way around.

1: https://github.com/BuilderIO/mitosis

2: https://github.com/BuilderIO/ts-lite/tree/main/packages/core

3: https://github.com/BuilderIO/qwik

• SurveyJS

  surveyjs.io sponsored

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

• Monocle

  5 1,630 8.2 Scala

  Optics library for Scala

  

A very popular Scala optics library is also called Monocle. I’ve been a happy user for a few years:

https://github.com/optics-dev/Monocle

• estree

  8 4,952 5.3

  The ESTree Spec

  

• Babel (Formerly 6to5)

  58 42,901 9.7 TypeScript

  🐠 Babel is a compiler for writing next generation JavaScript.

  

[2] https://github.com/babel/babel

• Acorn

  13 10,215 7.8 JavaScript

  A small, fast, JavaScript-based JavaScript parser

  

• espree

  5 2,241 6.5 JavaScript

  An Esprima-compatible JavaScript parser

  

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• recast

  6 4,821 6.1 TypeScript

  JavaScript syntax tree transformer, nondestructive pretty-printer, and automatic source map generator

• escodegen

  3 2,615 1.2 JavaScript

  ECMAScript code generator

  

• openapi-preprocessor

  2 34 3.7 Go

  An authoring tool for OpenAPI specifications

  

I use a mixed approach for OpenAPI, but not bidirectional.

I have OpenAPI pieces generated from my Go source code (comment, types, function signatures) as JSON.

I also have a manually-edited master YAML document that refers to generated bits via $ref links.

I then use openapi-preprocessor [1] (disclaimer: I wrote it) to produce a final openapi.json file which is committed in the repo.

When I want to extend the API in a spec-first process, I can add the new routes manually in the YAML file. When I do the implementation I replace the manual bits by the generated one when they are ready. When committing I can check the diff of openapi.json to verify I'm not losing in the process.

[1] https://github.com/dolmen-go/openapi-preprocessor

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