Problems with "language-region" locale identifier

[rubas]

Kip, your ongoing maintenance of the CLDR-related libraries is truly invaluable to the Elixir community. Thank you so much ❤️

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Problem: Route Generation

Verified routes with mix phx.routes Application.Router

If I enable the locales: en-CH de-CH fr-CH, I only get routes for /en/...

If I enable the locales en-CH de, I get routes for /en/... and /de/...

Problem: Mismatch CLDR <> Gettext

I'm unsure, how to make everything work.

Mismatch

There is mismatch between CDLR (de-CH) and Gettext(de_CH), this creates issue with Cldr.Plug.PutLocale ([warning] Locale "de-CH" does not have a known Gettext locale. No Gettext locale has been set.

iex(1)> Gettext.put_locale(Application.Gettext, "de-CH")
nil
iex(2)> Gettext.put_locale(Application.Gettext, "de_CH")
"de-CH"

Recognition

As it's not working yet, I couldn't test it. But I'm wondering, if /de would match the correctly to de_CH or not.

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Details

default_locale: "de-CH",
enabled_locales: ~w(de-CH en-CH fr-CH)

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plug Cldr.Plug.PutLocale,
  apps: [:cldr, :gettext],
  from: [:route],
  gettext: BookingWeb.Gettext,
  cldr: Booking.Cldr

plug Cldr.Plug.PutSession, as: :string

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Generating Application.Cldr for 7 locales named [:de, :"de-CH", :en, :"en-CH", :fr, ...] with a default locale named :"de-CH"