OSS Highlights of September - October 2021

This year I'm receiving a long term grant from Clojurists Together. CT asked me to do a bimonthly report on my activities or write a blog post and link to that. That's what I'm doing here. I'll be going over the releases of existing and new projects and will mention highlights in some of them. Often, the devil is in the details and there aren't any new user-facing features, but still a lot of work has gone into refining existing features.

Donations from Github Sponsors, OpenCollective and the year long CT grant directly allow me to spend more time on open source. The list you are seeing here is a result of this. I love working on open source so thank you for allowing me to do this. In this ClojureScript podcast episode, Jacek Schae interviewed me on my decision to quit my previous job and work more on Clojure OSS. Have a listen if you want to know more about my motivations. If aside from sponsoring, you or your company needs work done on any of these or related projects and want to make a custom arrangement, please do reach out.

Note that the projects listed below are not exclusively my effort and are worked on by a number or regular contributors. My thanks also goes out to them.

Nbb

Ad-hoc CLJS scripting on Node.js using SCI.

Many releases on npm.

Highlights:

Console REPL. If you have Node.js simply type npx nbb and you will be dropped into a REPL.
Socket server REPL
nREPL server for development with Calva
Add clojure.test so you can now use nbb to develop e.g. browser tests using puppeteer or playwright
Support for reader conditionals using :org.babashka/nbb
Print nicer stacktrace when error happens (similar to bb)
Misc. fixes and enhancements.
Add js-interop module
Add Javascript API

Many exciting things are happening around this project in the community. It's now possible to run nbb on lambda. Exercism is using babashka and nbb to run Clojure exercise submissions. Sitefox is a CLJS + Node.js web framework that works well with nbb.

Clj-kondo

A linter for Clojure (code) that sparks joy.

Releases: 2021.10.19 , 2021.09.25 , 2021.09.15 , 2021.09.14

Highlights:

New linter: warn on missing gen-class when writing -main function. See docs.
New loop without recur linter. See docs.
Several inference improvements, e.g. (def f (fn [])) (f 1 2) will now give an arity warning.
Return arbitrary metadata in analysis data. See docs.