Forbid root user creation as it could lead to a system without any
non-priviledged user accouts.

Fixes: <https://issues.guix.gnu.org/54666>.

* gnu/installer/newt/user.scm (run-user-add-page): Forbid it.

* gnu/installer/user.scm (<secret>, secret?, make-secret,
secret-content): Add opaque <secret> record that boxes its contents,
with a custom printer that doesn't display anything.
* gnu/installer/newt/user.scm (run-user-add-page, run-user-page): Box
it.
* gnu/installer/final.scm (create-user-database): Unbox it.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

* gnu/installer/steps.scm (run-installer-steps): Set up
'installer-step prompt.
* gnu/installer/newt/ethernet.scm (run-ethernet-page)
* gnu/installer/newt/final.scm (run-config-display-page,
run-install-failed-page)
* gnu/installer/newt/keymap.scm (run-layout-page, run-variant-page)
* gnu/installer/newt/locale.scm (run-language-page,
run-territory-page, run-codeset-page, run-modifier-page,
run-locale-page)
* gnu/installer/newt/network.scm (run-technology-page,
wait-service-online)
* gnu/installer/newt/page.scm (run-listbox-selection-page,
run-checkbox-tree-page)
* gnu/installer/newt/partition.scm (button-exit-action)
* gnu/installer/newt/services.scm (run-desktop-environments-cbt-page,
run-networking-cbt-page, run-other-services-cbt-page,
run-network-management-page)
* gnu/installer/newt/timezone.scm (run-timezone-page)
* gnu/installer/newt/user.scm (run-user-page)
* gnu/installer/newt/welcome.scm (run-menu-page)
* gnu/installer/newt/wifi.scm (run-wifi-page): Use the 'installer-step
prompt to abort.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

* gnu/installer/newt/page.scm (run-input-page): Remove component argument that
  is not longer passed to the procedure passed to 'add-component-callback',
 (run-listbox-selection-page): ditto.
 * gnu/installer/newt/user.scm (run-user-add-page): Ditto,
 (run-user-add-page): ditto.

This will allow us to automate testing of the installer.

* gnu/installer/utils.scm (%client-socket-file)
(current-server-socket, current-clients): New variables.
(open-server-socket, call-with-server-socket): New procedure.
(with-server-socket): New macro.
(run-shell-command): Add call to 'send-to-clients'.  Select on both
current-input-port and current-clients.
* gnu/installer/steps.scm (run-installer-steps): Wrap 'call-with-prompt'
in 'with-socket-server'.  Call 'sigaction' for SIGPIPE.
* gnu/installer/newt/page.scm (watch-clients!, close-port-and-reuse-fd)
(run-form-with-clients, send-to-clients): New procedures.
(draw-info-page): Add call to 'run-form-with-clients'.
(run-input-page): Likewise.  Handle EXIT-REASON equal to 'exit-fd-ready.
(run-confirmation-page): Likewise.
(run-listbox-selection-page): Likewise.  Define 'choice->item' and use it.
(run-checkbox-tree-page): Likewise.
(run-file-textbox-page): Add call to 'run-form-with-clients'.  Handle
'exit-fd-ready'.
* gnu/installer/newt/partition.scm (run-disk-page): Pass
 #:client-callback-procedure to 'run-listbox-selection-page'.
* gnu/installer/newt/user.scm (run-user-page): Call
'run-form-with-clients'.  Handle 'exit-fd-ready'.
* gnu/installer/newt/welcome.scm (run-menu-page): Define
'choice->item' and use it.  Call 'run-form-with-clients'.
* gnu/installer/newt/final.scm (run-install-success-page)
(run-install-failed-page): When (current-clients) is non-empty, call
'send-to-clients' without displaying a choice window.

* gnu/installer/newt/user.scm (run-root-password-page): Move
"TRANSLATORS" comment right above 'G_' call.

* gnu/installer/newt/user.scm (run-user-add-page): Change the input
visibility checkbox's text to ‘Show’, and default to unchecked.
* gnu/installer/newt/page.scm (run-input-page): Likewise.
Rename INPUT-HIDE-CHECKBOX? argument to INPUT-VISIBILITY-CHECKBOX?.

Fixes <https://bugs.gnu.org/35716>.
Reported by sirmacik <sirmacik@wioo.waw.pl>.

* gnu/installer/newt/page.scm (run-input-page): Add FLAG-SCROLL to
INPUT-FLAGS*.
* gnu/installer/newt/user.scm (run-user-add-page): Add FLAG-SCROLL to
ENTRY-PASSWORD.

* gnu/installer/newt/user.scm (run-user-page): Add 'G_' call for "User
creation".

Fixes <https://bugs.gnu.org/35607>.
Reported by Florian Pelz <pelzflorian@pelzflorian.de>.

* gnu/installer/newt/user.scm (run-user-page): Add 'cond' clause for
ARGUMENT = EXIT-BUTTON.