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

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.

Open the details section for more info.

Advent of Code

It is Advent of Code time of year again. You can solve puzzles in an online squint or cherry playground here.

Change the /squint/ part of the url to /cherry/ to switch ClojureScript dialect versions.

You can read more about the playground here.

Updates

Here are updates about the projects/libraries I've worked on last month.

• blog I've written two blog posts this month:

  • Writing a Cloudflare worker with squint and bun
  • Playing Advent of Code with Squint.

• squint: CLJS syntax to JS compiler
  Lots of stuff happened in November with squint! You could say that I've grown a little addicted to improving this project currently, driven by how users use it and also while developing the playground, a lot of potential improvements emerged..

  - Restore backward compatibility with code that is compiled with older versions of squint - Optimize various outputs for smaller size - Add `js-in` - Support `into` + `xform` - Support `sort` on strings - [#386](https://github.com/squint-cljs/squint/issues/386): allow expression in value position in map literal - Improvements with respect to laziness in `mapcat` and `concat` - Do not array mutate argument in `reverse` - Escape JSX attribute vector value (and more) - `map` + `transduce` support - Fix `for` in REPL mode - Throw when object is not iterable in `for` - Make next lazy when input is lazy - Fix playground shim (fixes issue in older versions of Safari) - Add `js-mod` and `quot` - [#380](https://github.com/squint-cljs/squint/issues/380): Don't emit space in between `#jsx` tags - Add `re-find` - Add `condp` macro - Use `compare` as default compare function in `sort` (which fixes numerical sorting) - Allow `assoc!` to be called on arbitrary classes (regression) - Improve `get` to call `get` method when present. - Allow keywords and collections to be used as functions in HOFs - Make filter, etc aware of truthiness - Reduce code size for truthiness checks - Add `str/split-lines` - Add `partition-by` - Add `parse-long` - Add `sort-by` - Fix top level await - Support multiple dimensions in `aset` - Add `coercive-=` as alias for `==` - Add `js-delete` - Fix `min-key` and `max-key` and improve tests - Add `min-key` and `max-key` - Fix `defonce` in REPL-mode - Fix `doseq` and `for` when binding name clashes with core var - Several REPL improvements - Improve [https://squint-cljs.github.io/squint/](https://squint-cljs.github.io/squint/) - Allow alias name to be used as object in REPL mode - Copy resources when using `squint compile` or `squint watch` - Return map when `select-keys` is called with `nil` - nREPL server: print values through `cljs.pprint` ([@PEZ](https://github.com/PEZ)) - Initial (incomplete!) nREPL server on Node.js: `npx squint nrepl-server :port 1888` - Update/refactor [threejs](https://github.com/squint-cljs/squint/tree/main/examples/threejs) example - [#360](https://github.com/squint-cljs/squint/issues/360): `assoc-in!` should not mutate objects in the middle if they already exist - Evaluate `lazy-seq` body just once - Avoid stackoverflow with `min` and `max` - [#360](https://github.com/squint-cljs/squint/issues/360): fix assoc-in! with immutable objects in the middle - Add `mod`, `object?` - Optimize `get` - Add [threejs](https://github.com/squint-cljs/squint/tree/main/examples/threejs) example - [#357](https://github.com/squint-cljs/squint/issues/357): fix version in help text - Fix iterating over objects - Add `clojure.string`'s `triml`, `trimr`, `replace` - Fix `examples/vite-react` by adding `public/index.html` - Add `find`, `bounded-count`, `boolean?`, `merge-with`, `meta`, `with-meta`, `int?`, `ex-message`, `ex-cause`, `ex-info` - Fix munging of reserved symbols in function arguments

• scittle-hoplon: a custom scittle distribution with Hoplon. I helped developing the SCI configuration for Hoplon.

• gespensterfelder: a demo that Jack Rusher wrote using Three.js ported to squint.

• neil: A CLI to add common aliases and features to deps.edn-based projects Version 0.2.63 released which adds mvn search and some bugfixes

• CLI: Turn Clojure functions into CLIs!

  • Small bugfix around priority of :exec-args and default

• aoc-proxy: a Cloudflare worker that can be used to fetch Advent of Code puzzle input from the browser (see Advent of Code playground)

• squint-macros: a couple of macros that stand-in for applied-science/js-interop and promesa to make CLJS projects compatible with squint and/or cherry.

• clojure-mode: Clojure/Script mode for CodeMirror 6.

  • Ported the eval-region extension to squint so you can use it straight from JS. This is used in the squint playground when you press Cmd-Enter after an expression.

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

  • A helper macro was improved such that you can define macros that are usable in SCI
  • The re-frame configuration now has support for re-frame.alpha. See playground.

• babashka: native, fast starting Clojure interpreter for scripting. A new release: 1.3.186!

  - [Support self-contained binaries as uberjars!](https://github.com/babashka/babashka/wiki/Self-contained-executable#uberjar) - Add `java.security.KeyFactory`, `java.security.spec.PKCS8EncodedKeySpec`, `java.net.URISyntaxException`, `javax.crypto.spec.IvParameterSpec` - Fix babashka.process/exec wrt `babashka.process/*defaults*` - [#1632](https://github.com/babashka/babashka/issues/1632): Partial fix for `(.readPassword (System/console))` - Enable producing self-contained binaries using [uberjars](https://github.com/babashka/babashka/wiki/Self-contained-executable#uberjar) - Bump httpkit to `2.8.0-beta3` (fixes GraalVM issue with virtual threads) - Bump `deps.clj` and `fs` - Expose `taoensso.timbre.appenders.core` - nREPL: implement `ns-list` op - SCI: optimize `swap!`, `deref` and `reset!` for normal atoms (rather than user-created `IAtom`s) - Add test for [#1639](https://github.com/babashka/babashka/issues/1639) - Upgrade to GraalVM 21.0.1
  Still unreleased: - Add `java.util.ScheduledFuture` - Support `Runnable` to be used without import - Allow `catch` to be used as var name

• SCI: Configurable Clojure/Script interpreter suitable for scripting and Clojure DSLs
  Released version 0.8.41

  • Bump edamame to 1.3.23
  • #889: allow (def foo/foo 1) when inside namespace foo
  • #891: reset file metadata on var when it's re-evaluated from other file
  • #893: expose sci.async/eval-form and sci.async/eval-form+
  • Improve sci.async/eval-string, respect top-level do forms
  • Add experimental new :static-methods option to override how static methods get evaluated.
  • Expose destructure
  • Macroexpand (.foo bar) form
  • Optimize deref, swap!, reset! for host values
  • Add time macro to core namespace
  • #896: allow catch to be used as var name

• cherry: Experimental ClojureScript to ES6 module compiler

  • Released version 0.1.10 which catches up with the latest compiler improvements in squint

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

  • New :condition-always-true and :underscore-in-namespace linters + couple of bugfixes. Release expected in December.

Other projects

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