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A minimal wrapper over Vega/Vega-lite as a single JVM-only Clojure library

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Darkstar

Darkstar packages Vega 5.10.1 and Vega-lite 4.10.1 as a single dependency Clojure library with a very small API surface.

This was made relatively easy by the GraalJS Javascript runtime, which should work on any stock JVM >= 1.8.0_131. I have tested it on that version of HotSpot, as well as OpenJDK 11 and 13.

Installation

We have not yet released to Clojars, so we recommended you use deps.edn:

applied-science/darkstar {:git/url "https://github.com/applied-science/darkstar/"
                          :sha "541a3ff36065c59e92fe6aa61e41a4385ba6f893"}

Usage

(ns test
  (:require [applied-science.darkstar :as darkstar]))

;; write an SVG from a Vega spec
(->> (slurp "vega-example.json")
     darkstar/vega-spec->svg
     (spit "vg-example.svg"))

;; write an SVG from a Vega-lite spec
(->> (slurp "vega-lite-example.json")
     darkstar/vega-lite-spec->svg
     (spit "vl-example.svg"))

Development

Build a deployable jar of this library:

$ clojure -A:jar

Install it locally:

$ clojure -A:install

Deploy it to Clojars -- needs CLOJARS_USERNAME and CLOJARS_PASSWORD environment variables:

$ clojure -A:deploy

License

Copyright © 2020 Applied Science

Distributed under the MIT License.

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