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

To see previous OSS updates, go here.

Sponsors

I'd like to thank all the sponsors and contributors that make this work possible. Without you, the below projects would not be as mature or wouldn't exist or be maintained at all.

Current top tier sponsors:

• Clojurists Together
• Roam Research
• Nextjournal
• Nubank

Open the details section for more info about sponsoring.

Updates

In September I visited Heart of Clojure where Christian, Teodor and I did a workshop on babashka. The first workshop was soon fully booked so we even did a second one and had a lot of fun doing so. It was so good to see familiar Clojure faces in real life again. Thanks Arne and Gaiwan team for organizing this amazing conference.

Although I didn't make it to the USA for the Clojure conj in October, Alex Miller did invite me to appear towards the end of his closing talk when he mentioned that 90% of survey respondents used babashka.

If you are interested in a full stack web framework with babashka and squint, check out borkweb.

Here are updates about the projects/libraries I've worked on in the last two months.

• clj-kondo: static analyzer and linter for Clojure code that sparks joy.
  

  • Unreleased
  • #1784: detect :redundant-do in catch
  • #2410: add --report-level flag
  • 2024.09.27
  • #2404: fix regression with metadata on node in hook caused by :redundant-ignore linter
  • 2024.09.26
  • #2366: new linter: :redundant-ignore. See docs
  • #2386: fix regression introduced in #2364 in letfn
  • #2389: add new hooks-api/callstack function
  • #2392: don't skip jars that were analyzed with --skip-lint
  • #2395: enum constant call warnings
  • #2400: deftype and defrecord constructors can be used with Type/new
  • #2394: add :sort option to :unsorted-required-namespaces linter to enable case-sensitive sort to match other tools
  • #2384: recognize gen/fmap var in cljs.spec.gen.alpha

• babashka: native, fast starting Clojure interpreter for scripting.

  • #1752: include java.lang.SecurityException for java.net.http.HttpClient support
  • #1748: add clojure.core/ensure
  • Upgrade to taoensso/timbre v6.6.0
  • Upgrade to GraalVM 23
  • #1743: fix new fully qualified instance method in call position with GraalVM 23
  • Clojure 1.12 interop: method thunks, FI coercion, array notation (see below)
  • Upgrade SCI reflector based on clojure 1.12 and remove specific workaround for Thread/sleep interop
  • Add tools.reader.edn/read
  • Fix #1741: (taoensso.timbre/spy) now relies on macros from taoensso.encore previously not available in bb
  • Upgrade Clojure to 1.12.0
  • #1722: add new clojure 1.12 vars
  • #1720: include new clojure 1.12's clojure.java.process
  • #1719: add new clojure 1.12 clojure.repl.deps namespace. Only calls with explicit versions are supported.
  • #1598: use Rosetta on CircleCI to build x64 images
  • #1716: expose babashka.http-client.interceptors namespace
  • #1707: support aset on primitive array
  • #1676: restore compatibility with newest at-at version (1.3.58)
  • Bump SCI
  • Bump fs
  • Bump process
  • Bump deps.clj
  • Bump http-client
  • Bump clj-yaml
  • Bump edamame
  • Bump rewrite-clj
  • Add java.io.LineNumberReader

• SCI: Configurable Clojure/Script interpreter suitable for scripting and Clojure DSLs

  • Fix #942: improve error location of invalid destructuring
  • Fix #917: support new Clojure 1.12 Java interop: String/new, String/.length and Integer/parseInt as fns
  • Fix #925: support new Clojure 1.12 array notation: String/1, byte/2
  • Fix #926: Support add-watch on vars in CLJS
  • Support aset on primitive array using reflection
  • Fix #928: record constructor supports optional meta + ext map
  • Fix #934: :allow may contain namespaced symbols
  • Fix #937: throw when copying non-existent namespace
  • Update sci.impl.Reflector (used for implementing JVM interop) to match Clojure 1.12

• squint: CLJS syntax to JS compiler

  • Fix watcher and compiler not overriding squint.edn configurations with command line options.
  • Allow passing --extension and --paths via CLI
  • Fix #563: prioritize refer over core built-in
  • Update chokidar to v4 which reduces the number of dependencies
  • BREAKING: Dynamic CSS in #html must now be explicitly passed as map literal: (let [m {:color :green}] #html [:div {:style {:& m}}]). Fixes issue when using lit-html in combination with classMap. See demo
  • #556: fix referring to var in other namespace via global object in REPL mode
  • Pass --repl opts to watch subcommand in CLI
  • #552: fix REPL output with hyphen in ns name
  • Ongoing work on browser REPL. Stay tuned.

• cherry: Experimental ClojureScript to ES6 module compiler

  • Fix referring to vars in other namespaces globally
  • Allow defclass to be referenced through other macros, e.g. as cherry.core/defclass
  • Fix emitting keyword in HTML
  • #138: Support #html literals, ported from squint

• http-client: babashka's http-client
  

  • #68 Fix accidental URI path decoding in uri-with-query (@hxtmdev)
  • #71: Link back to sources in release artifact (@lread)
  • #73: Allow implicit ports when specifying the URL as a map (@lvh)

• http-server: serve static assets

  • #16: support range requests (jmglov)
  • #13: add an ending slash to the dir link, and don't encode the slashes (@KDr2)
  • #12: Add headers to index page (rather than just file responses)

• bbin: Install any Babashka script or project with one command
  

  • Fix #88: bbin ls with 0-length files doesn't crash

• scittle: Execute Clojure(Script) directly from browser script tags via SCI

• Add cljs.pprint/code-dispatch and cljs.pprint/with-pprint-dispatch

• clojurescript

  • Throw when calling ana-api/ns-publics on non-existing ns

• neil: A CLI to add common aliases and features to deps.edn-based projects.
  

  • #241: ignore missing deps file (instead of throwing) in neil new (@bobisageek)

• sci.configs: A collection of ready to be used SCI configs.

  • Added a configuration for cljs.spec.alpha and related namespaces

• nbb: Scripting in Clojure on Node.js using SCI

  • Include cljs.spec.alpha, cljs.spec.gen.alpha, cljs.spec.test.alpha

• qualify-methods

  • Initial release of experimental tool to rewrite instance calls to use fully qualified methods (Clojure 1.12 only0

• clerk: Moldable Live Programming for Clojure

  • Add support for :require-cljs which allows you to use .cljs files for render functions
  • Add support for nREPL for developing render functions

• deps.clj: A faithful port of the clojure CLI bash script to Clojure

  • Upgrade/sync with clojure CLI v1.12.0.1479

• process: Clojure library for shelling out / spawning sub-processes

  • Work has started to support prepending output (in support for babashka parallel tasks). Stay tuned.

Other projects

These are (some of the) other projects I'm involved with but little to no activity happened in the past month.