Show HN: Guts – convert Golang types to TypeScript

Summary

Go Unto Ts (guts) guts is a tool to convert golang types to typescript for enabling a consistent type definition across the frontend and backend. It is intended to be called and customized as a library, rather than as a command line executable. See the simple example for a basic usage of the library. type SimpleType [ T comparable ] struct { FieldString string FieldInt int FieldComparable T FieldTime time. Time } Gets converted into type Comparable = string | number | boolean ; // From main/main.go interface SimpleType < T extends Comparable > { FieldString : string ; FieldInt : number ; FieldComparable : T ; FieldTime : string ; } How to use it guts is a library, not a command line utility. This is to allow configuration with code, and also helps with package resolution. See the simple example for a basic usage of the library. A larger example can be found in the Coder repository. // Step 1: Create a new Golang parser golang , _ := guts . NewGolangParser () // Optional: Preserve comments from the golang source code // This feature is still experimental and may not work in all cases golang . Preserve () // Step 2: Configure the parser _ = golang . IncludeGenerate ( "github.com/coder/guts/example/simple" ) // Step 3: Convert the Golang to the typescript AST ts , _ := golang . ToTypescript () // Step 4: Mutate the typescript AST ts . ApplyMutations ( config . ExportTypes , // add 'export' to all top level declarations ) // Step 5: Serialize the typescript AST to a string output , _ := ts . Serialize () fmt . Println ( output ) How it works guts first parses a set of golang packages. The Go AST is traversed to find all the types defined in the packages. These types are placed into a simple AST that directly maps to the typescript AST. Using goja, these types are then serialized to typescript using the typescript compiler API. Generator Opinions The generator aims to do the bare minimum type conversion. An example of a common opinion, is to use types to represent enums....