Almost Clojure
in Go.

let-go is a Clojure-like lisp, running on a small Go-built VM instead of the JVM, so it boots fast and fits in a pocket. Your programs compile to standalone binaries.

10 MBbinary
6.7 mscold start
13.5 MBidle memory
95 %jank suite

▌booting wasm…

try

Install

homebrew brew tap nooga/let-go https://github.com/nooga/let-go brew install let-go

go go install github.com/nooga/let-go@latest

Usage

One lg binary covers the lifecycle: open a REPL, bundle a script into a standalone executable, or build a self-contained WASM page.

REPL lg
nREPL lg -n starts an nREPL server on port 2137 for Calva, CIDER, etc.
Bundle lg -b myprog main.lg produces a standalone binary.
WASM lg -w ./out main.lg a static directory with html, wasm, and runtime.

Embedding

let-go embeds in any Go program as a library. Define Go values and functions on the runtime, evaluate Clojure source against them. Channels, structs, and slices cross the boundary in both directions.

// go get github.com/nooga/let-go
import "github.com/nooga/let-go/pkg/api"

lg, _ := api.NewLetGo("user")

lg.Def("x", 42)
lg.Def("mul", func(a, b int) int { return a * b })

v, _ := lg.Run("(mul x 2)") // => 84

Install

Usage

Embedding

See also