Joyride scripts do not get full clojure-lsp support

[PEZ]

clojure-lsp needs a classpath to provide information about dependencies. The current workaround is to provide a bb.edn, or deps.edn with something like this content:

{:paths ["src" "scripts"]
 :deps {org.clojure/clojurescript {:mvn/version "1.11.54"}}}

The problems with this are (at least):

• deps.edn probably has other uses in the project (like being config for your Clojure project)
• ditto bb.edn
• It creates a dependency on Java and the Clojure CLI (or Java and Babashka).

On the bright side:

• @ericdallo is welcoming a default Joyride project spec in clojure-lsp. It needs a classpath-cmd that can resolve the classpath from a, say joyride.edn, file.
• @borkdude has created https://github.com/babashka/tools-deps-native, a binary that does not have a Java dependency to calculate the classpath.

tools-deps-native is experimental, but I think that's fine for our use case.

With this we should be able to support a clojure-lsp project spec looking something like so:

{:project-specs [{:project-path "joyride.edn"
                  :classpath-cmd ["tools-deps-native" ,,,]}]}

Command line args to be figured out. tools-deps-native crurrently has this interface

$ tools-deps-native

tools.deps.edn ...

          help  show this help message
          deps  output a claspath map from a deps map
  create-basis  output a basis from a set of deps sources and a set of aliases
     root-deps  output the root deps.edn
    slurp-deps  read, canonicalize and output a deps.edn file
user-deps-path  output the path to the users deps.edn file

Example usage:

$ tools-deps-native deps '{:deps {medley/medley {:mvn/version "1.0.0"}}}'
{:classpath-roots ["/Users/borkdude/.m2/repository/medley/medley/1.0.0/medley-1.0.0.jar" "/Users/borkdude/.m2/repository/org/clojure/clojure/1.7.0/clojure-1.7.0.jar"], :classpath {"/Users/borkdude/.m2/repository/medley/medley/1.0.0/medley-1.0.0.jar" {:lib-name medley/medley}, "/Users/borkdude/.m2/repository/org/clojure/clojure/1.7.0/clojure-1.7.0.jar" {:lib-name org.clojure/clojure}}}

[PEZ]

Currently tools-deps-native only spits out EDN, so we will need a way to convert that to a classpath string. Ideas:

• use squint to create a JS script that Joyride can place in a known location
  • Here's potential help for that https://github.com/jorinvo/edn-data
• use npx nbb ...

Both these add a dependency on NodeJS, but maybe that's fine for now.

[ericdallo]

@PEZ also keep in mind that adding that default project spec to clojure-lsp means that we would expect all joyride users that create a joyride.edn to have tools-deps-native installed, which may be ok, but if we could manage to make it work without it would be even nicer

[PEZ]

I think we have exhausted the alternatives. Wherever we turn we hit dependencies, and this one we can fulfill by Joyride downloading tools-deps-native.