occ maintenance:install needs a --adminemail argument

[jernst]

Otherwise, the admin account is set up incompletely and sending e-mail from the account does not work.

[nextcloud-bot]

GitMate.io thinks possibly related issues are #3555 (Scripted "occ maintenance:install" only accepts the admin password as cleartext), #7563 ([occ] Hide "not installed" info on "occ maintenance:install"), #6313 ('occ maintenance:install' sets 'overwrite.cli.url' to 'http://localhost'), #5049 ([STABLE 12] .occ install doesn't create DB), and #11070 (occ app:install works on and off).

[enoch85]

Would be a nice improvement, but email is typically something I setup after the installation in GUI.

No need to send any emails during the installation right?

[jernst]

We are producing the UBOSbox Nextcloud https://indiecomputing.com/products/ . Part of the proposition for this product is that the user has to do little "administration". So we'd like to automatically set up as much as humanly, eh, computerly, possible.

[kesselb]

@jernst @enoch85 could you test pr #11204? https://github.com/nextcloud/server/pull/11204.patch