Re: SpiderMonkey 60 in CouchDB 3.x

[Jan Lehnardt <ja...@apache.org>]

Hi Joel,

> On 25. Mar 2020, at 18:29, Joel Jucá <jo...@gmail.com> wrote:
> 
> Hello community!
> 
> I saw the announcement of CouchDB 3 with great enthusiasm when there was a
> mention of the updated JavaScript engine, SpiderMonkey version 60. It seems
> to fully support ES6, so it would be possible to write queries and/or
> design documents using JavaScript modules (eg: ESM, CommonJS, etc.)?

You can already use CommonJS modules in CouchDB. This continues to work:

   https://docs.couchdb.org/en/stable/query-server/javascript.html#commonjs

We didn’t build any support for ESM and that likely won’t happen, unless
someone volunteers to champion that.


> The thing that I always wondered would be how a professional flow could be
> set up for a code that's supposed to live inside CouchDB. How could I write
> code that's submitted to tests on a CI pipeline, and deployed to a CouchDB
> instance on successful executions? Or, how could I leverage JavaScript/npm
> ecosystem to build such functionalities? Also, how could I provision a
> database from a blank-slate CouchDB (eg: a Docker image) and inject all
> configurations *and* documents on it automatically? Is it something that
> SpiderMonkey 60 could be helpful with?

I recommend doing all this tooling outside of CouchDB. My favourite tool for
this is https://github.com/jo/couchdb-bootstrap which allows significant
automation of many things you might want to do.

To add a layer of CI testing, I built https://github.com/janl/couchdb-ddoc-test some time ago. It is very basic, but does the job.

Best
Jan
—

> PS: I'm a basic user of CouchDB. I currently do not run services using it,
> but I've been interested in using it for a while - hence my questions.
> 
> -- 
> Joel Jucá
> about.me/joelwallis