how to use cron-parser / luxon / Intl with HardenedJS?

[dckc]

I'd like to use cron-parser in a Compartment.

It uses luxon, which uses Intl.DateTimeFormat, so it doesn't get along with Hardened JS:

$ endo run ./index.js 
(TypeError#1)
TypeError#1: Cannot read properties of undefined (reading 'DateTimeFormat')

  at systemLocale (.../luxon/src/impl/locale.js:59:25)
  at Locale.create (.../luxon/src/impl/locale.js:344:53)
  at Locale.fromObject (.../luxon/src/impl/locale.js:359:15)
  at quickDT (.../luxon/src/datetime.js:377:12)
  at DateTime.local (.../luxon/src/datetime.js:569:8)
  at new CronDate (eval at <anonymous> (eval at makeEvaluate (packages/ses/src/make-evaluate.js:92:27)), <anonymous>:228:33)
  at parse (eval at <anonymous> (eval at makeEvaluate (packages/ses/src/make-evaluate.js:92:27)), <anonymous>:853:29)
  at Function.parse (eval at <anonymous> (eval at makeEvaluate (packages/ses/src/make-evaluate.js:92:27)), <anonymous>:938:10)
  at Function.parseExpression (eval at <anonymous> (eval at makeEvaluate (packages/ses/src/make-evaluate.js:92:27)), <anonymous>:41:25)
  at Proxy.main (.../intl-problem/index.js:4:14)
  at packages/cli/src/run.js:94:40
  at async packages/cli/src/context.js:72:7
  at async packages/cli/src/context.js:55:7
  at async packages/cli/src/context.js:43:5
  at async withInterrupt (packages/cli/src/context.js:14:5)
  at async run (packages/cli/src/run.js:37:3)
  at async Promise.all (index 0)
  at async main (packages/cli/src/endo.js:623:5)
  at async packages/cli/bin/endo.cjs:4:3

I looked for a quick hack to hard-code it to use the C locale or some such, but gave up after 10 or 15 min.

Suggestions?

• index.js
• package.json

cc @kriskowal @gibson042 @kbennett2000