Bare hydrogen core project fails at (go)

[werenall]

Steps to reproduce:

lein new duct testing-go +cljs +site +hydrogen/core
cd testing-go
lein repl
(dev)
(go)

I get this error:

user=> (dev)
:loaded
dev=> (go)
Execution error (ClassNotFoundException) at jdk.internal.loader.BuiltinClassLoader/loadClass (BuiltinClassLoader.java:583).
com.fasterxml.jackson.core.util.JacksonFeature

I hot-fixed it by adding this dependency to project.clj:
[com.fasterxml.jackson.core/jackson-core "2.12.3"]

How did I know that that's the issue?
lein deps :tree

But that shouldn't be necessary to do in product project. This dependency conflict should probably be fixed either in the template or the core module.

[iarenaza]

I'm afraid it's broken because base Duct template upgraded the version of duct.module/web, which in turn upgraded to a more recent muuntaja version, that in turn needs a more recent jackson library (because it uses something that is not available in older versions).

But our own Hydrogen duct template cljs-ajax dependency depends on an older version of jackson, and that one happens to be the one chosen by Leiniengen (hence the error).

I have a local commit for that in hydrogen.duct-template. I add a direct dependency for metosin/jsonista v 0.3.3, which is what duct.module/web also expects, and is also what muuntaja also uses. I also add it to be our default JSON manipulation library. It's both faster and more featureful than clojure.data.json and dakrone/cheshire, so I thought it would kill two birds with one stone.

[iarenaza]

Fixed in 6737dd5