REPL adventures

Hyper is a server-rendered web framework for Clojure.

Babashka 1.13.222 is the "conj" release!

In this post I'll give updates about open source I worked on during July and August 2026.

Today babashka 1.13.220 is released, with a new babashka.ffi namespace for calling C libraries directly from Babashka scripts.

Babashka tasks is a project task manager that is part of babashka since May 2021.

In this post I'll give updates about open source I worked on during May and June 2026.

Babashka CLI is a library to write command line tools.

Today fellow Clojurian Søren Knudsen asked the following question on Clojurians Slack: Say I'd like an overview of which fns in my Clojurescript app don't have :x metadata and aren't children of functions that have :x.

In this post I'll give updates about open source I worked on during March and April 2026.

In this post I'll give updates about open source I worked on during January and February 2026.

Babashka is a fast-starting native Clojure scripting runtime.

In this post I'll give updates about open source I worked on during November and December 2025.

Dear sponsors, As we approach Thanksgiving once again, I’m reminded that sustained open source software development, supported by long term sponsors, is not something to take for granted.

In this post I'll give updates about open source I worked on during September and October 2025.

Recently I've been excited about Eucalypt, a Reagent-clone in pure Squint.

In this post I'll give updates about open source I worked on during July and August 2025.

In this post I'll give updates about open source I worked on during May and June 2025.

In this post I'll give updates about open source I worked on during March and April 2025.

Consider the following Clojure code: (def thread-pool (java.util.concurrent.Executors/newCachedThreadPool)) (def fut (.submit thread-pool (fn [] 3))) @fut ;;=> ?

In this post I'll give updates about open source I worked on during January and February 2025.

In this post I'll give updates about open source I worked on during November and December 2024.

Dear sponsors, It's almost Thanksgiving again.

In this post I'll give updates about open source I worked on during September and October 2024.

In this post I'll give updates about open source I worked on during July and August 2024.

In this post I'll give updates about open source I worked on during May and June 2024.

In this post I'll give updates about open source I worked on during March and April 2024.

In this post I'll give updates about open source I worked on during January and February 2024.

In this post I'll give updates about open source I worked on during December 2023.

In this post I'll give updates about open source I worked on during November 2023.

In the previous post I described how I built a Cloudflare worker with squint.

In this post I'll describe how to write a Cloudflare worker with squint and bun.

Squint Squint is a ClojureScript syntax to JS compiler.

In this post I'll give updates about open source I worked on during October 2023.

In this post I'll give updates about open source I worked on during September 2023.

In this post I'll give updates about open source I worked on during August 2023.

In this post I'll give updates about open source I worked on during July 2023.

In this post I'll give updates about open source I worked on during June 2023.

In this post I'll give updates about open source I worked on during May 2023.

In this post I'll give updates about open source I worked on during April 2023.

In this post I'll give updates about open source I worked on during March 2023.

If you want to help me keep track of babashka-related news, please contribute to news.md or use the #babashka hashtag on Twitter or Mastodon. 2023-03 Releases 1.3.176, 1.3.175, 1.2.174: Biggest highlight: Switch to GraalVM 19 and enable virtual threads!

Cherry is a new, experimental ClojureScript compiler.

In this post I'll give updates about open source I worked on during February 2023.

In this post I'll give updates about open source I worked on during January 2023.

If you want to help me keep track of babashka-related news, please contribute to news.md or use the #babashka hashtag on Twitter or Mastodon.

In this post I'll give updates about open source I worked on during November and December 2022.

This is an overview of all the news collected about babashka in 2022!

I'm happy to announce a blog post written by me about babashka that was published on the GraalVM medium blog.

For testing babashka scripts, you can write your own test runner from scratch, which is easy enough: (ns my-test.runner (:require [clojure.test :as t])) (def test-namespaces '[my-test]) (defn -main [& _] (doseq [test-ns test-namespaces] (require…

In this post I'll give updates about open source I worked on during September and October 2022.