GNU bug report logs - #39729
[PATCH 0/7] Testing the graphical installer

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Package: guix-patches;

Reported by: Ludovic Courtès <ludo <at> gnu.org>

Date: Fri, 21 Feb 2020 23:18:02 UTC

Severity: normal

Tags: fixed, patch

Done: Ludovic Courtès <ludo <at> gnu.org>

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Report forwarded to m.othacehe <at> gmail.com, guix-patches <at> gnu.org:
bug#39729; Package guix-patches. (Fri, 21 Feb 2020 23:18:02 GMT) Full text and rfc822 format available.

Acknowledgement sent to Ludovic Courtès <ludo <at> gnu.org>:
New bug report received and forwarded. Copy sent to m.othacehe <at> gmail.com, guix-patches <at> gnu.org. (Fri, 21 Feb 2020 23:18:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: guix-patches <at> gnu.org
Cc: Ludovic Courtès <ludo <at> gnu.org>
Subject: [PATCH 0/7] Testing the graphical installer
Date: Sat, 22 Feb 2020 00:16:52 +0100
Hello!

Here’s a test for the graphical installer, as discussed earlier at:

  https://lists.gnu.org/archive/html/guix-devel/2020-01/msg00407.html

The first part of this patch series implements client support in the
installer as discussed above (only more robust to multiple clients,
disconnections, etc.).  A dirty bit there is the
‘close-port-and-reuse-fd’ hack, which works around the fact that Newt
does not provide a ‘form-unwatch-fd’ procedure.  Good enough for now!
There are also two hacks to (1) skip connectivity checks and (2) to
pass ‘--no-grafts’ to ‘guix system init’.

The second part implements the actual test.  The new (gnu installer
tests) module provides tools to implement a dialogue with the installer,
and the new “gui-installed-os” test uses it to perform a bare-bones
style installation.  There’s a commented out variant that does it on
an encrypted root, but it currently fails presumably due to
<https://issues.guix.gnu.org/issue/39712>.

That’s it!

Feedback welcome!

Ludo’.

PS: This patch series is also available as ‘wip-installer-test’.

Ludovic Courtès (7):
  tests: 'run-basic-test' can enter a root password.
  installer: Use a Guile-Newt snapshot that supports 'form-watch-fd'.
  installer: Implement a dialog on /var/guix/installer-socket.
  installer: Bypass connectivity check when /tmp/installer-assume-online
    exists.
  installer: Run commands without hopping through the shell.
  installer: Honor /tmp/installer-system-init-options.
  tests: install: Add "gui-installed-os".

 gnu/installer.scm                |  21 ++
 gnu/installer/final.scm          |  21 +-
 gnu/installer/newt/final.scm     |  40 ++-
 gnu/installer/newt/network.scm   |  10 +-
 gnu/installer/newt/page.scm      | 569 ++++++++++++++++++++-----------
 gnu/installer/newt/partition.scm |   8 +-
 gnu/installer/newt/user.scm      |  64 ++--
 gnu/installer/newt/welcome.scm   |  44 ++-
 gnu/installer/steps.scm          |  25 +-
 gnu/installer/tests.scm          | 340 ++++++++++++++++++
 gnu/installer/utils.scm          | 152 +++++++--
 gnu/local.mk                     |   3 +-
 gnu/tests/base.scm               |  23 +-
 gnu/tests/install.scm            | 200 ++++++++++-
 14 files changed, 1212 insertions(+), 308 deletions(-)
 create mode 100644 gnu/installer/tests.scm

-- 
2.25.1





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bug#39729; Package guix-patches. (Fri, 21 Feb 2020 23:21:02 GMT) Full text and rfc822 format available.

Message #8 received at 39729 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: 39729 <at> debbugs.gnu.org
Cc: Ludovic Courtès <ludo <at> gnu.org>
Subject: [PATCH 1/7] tests: 'run-basic-test' can enter a root password.
Date: Sat, 22 Feb 2020 00:20:24 +0100
* gnu/tests/base.scm (run-basic-test): Add #:root-password and honor it.
---
 gnu/tests/base.scm | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/gnu/tests/base.scm b/gnu/tests/base.scm
index a891711844..37b83dc7ec 100644
--- a/gnu/tests/base.scm
+++ b/gnu/tests/base.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2016, 2017, 2018, 2019 Ludovic Courtès <ludo <at> gnu.org>
+;;; Copyright © 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo <at> gnu.org>
 ;;; Copyright © 2018 Clément Lassieur <clement <at> lassieur.org>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -55,7 +55,7 @@
 
 
 (define* (run-basic-test os command #:optional (name "basic")
-                         #:key initialization)
+                         #:key initialization root-password)
   "Return a derivation called NAME that tests basic features of the OS started
 using COMMAND, a gexp that evaluates to a list of strings.  Compare some
 properties of running system to what's declared in OS, an <operating-system>.
@@ -63,7 +63,10 @@ properties of running system to what's declared in OS, an <operating-system>.
 When INITIALIZATION is true, it must be a one-argument procedure that is
 passed a gexp denoting the marionette, and it must return gexp that is
 inserted before the first test.  This is used to introduce an extra
-initialization step, such as entering a LUKS passphrase."
+initialization step, such as entering a LUKS passphrase.
+
+When ROOT-PASSWORD is true, enter it as the root password when logging in.
+Otherwise assume that there is no password for root."
   (define special-files
     (service-value
      (fold-services (operating-system-services os)
@@ -300,7 +303,19 @@ info --version")
                marionette)
 
               ;; Now we can type.
-              (marionette-type "root\n\nid -un > logged-in\n" marionette)
+              (let ((password #$root-password))
+                (if password
+                    (begin
+                      (marionette-type "root\n" marionette)
+                      (wait-for-screen-text marionette
+                                            (lambda (text)
+                                              (string-contains text "Password"))
+                                            #:ocrad
+                                            #$(file-append ocrad "/bin/ocrad"))
+                      (marionette-type (string-append password "\n\n")
+                                       marionette))
+                    (marionette-type "root\n\n" marionette)))
+              (marionette-type "id -un > logged-in\n" marionette)
 
               ;; It can take a while before the shell commands are executed.
               (marionette-eval '(use-modules (rnrs io ports)) marionette)
-- 
2.25.1





Information forwarded to guix-patches <at> gnu.org:
bug#39729; Package guix-patches. (Fri, 21 Feb 2020 23:21:02 GMT) Full text and rfc822 format available.

Message #11 received at 39729 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: 39729 <at> debbugs.gnu.org
Cc: Ludovic Courtès <ludo <at> gnu.org>
Subject: [PATCH 2/7] installer: Use a Guile-Newt snapshot that supports
 'form-watch-fd'.
Date: Sat, 22 Feb 2020 00:20:25 +0100
* gnu/installer.scm (guile-newt): New variable.
---
 gnu/installer.scm | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/gnu/installer.scm b/gnu/installer.scm
index edef3fde62..6c11fa6198 100644
--- a/gnu/installer.scm
+++ b/gnu/installer.scm
@@ -26,6 +26,8 @@
   #:use-module (guix utils)
   #:use-module (guix ui)
   #:use-module ((guix self) #:select (make-config.scm))
+  #:use-module (guix packages)
+  #:use-module (guix git-download)
   #:use-module (gnu installer utils)
   #:use-module (gnu packages admin)
   #:use-module (gnu packages base)
@@ -280,6 +282,25 @@ selected keymap."
              ((installer-final-page current-installer)
               result prev-steps))))))))
 
+(define guile-newt
+  ;; Guile-Newt with 'form-watch-fd'.
+  ;; TODO: Remove once a new release is out.
+  (let ((commit "b3c885d42cfac327d3531c9d064939514ce6bf12")
+        (revision "1"))
+    (package
+      (inherit (@ (gnu packages guile-xyz) guile-newt))
+      (name "guile-newt")
+      (version (git-version "0.0.1" revision commit))
+      (source  (origin
+                 (method git-fetch)
+                 (uri (git-reference
+                       (url "https://gitlab.com/mothacehe/guile-newt")
+                       (commit commit)))
+                 (file-name (git-file-name name version))
+                 (sha256
+                  (base32
+                   "02p0bi6c05699idgx6gfkljhqgi8zf09clhzx81i8wa064s70r1y")))))))
+
 (define (installer-program)
   "Return a file-like object that runs the given INSTALLER."
   (define init-gettext
-- 
2.25.1





Information forwarded to guix-patches <at> gnu.org:
bug#39729; Package guix-patches. (Fri, 21 Feb 2020 23:21:02 GMT) Full text and rfc822 format available.

Message #14 received at 39729 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: 39729 <at> debbugs.gnu.org
Cc: Ludovic Courtès <ludo <at> gnu.org>
Subject: [PATCH 4/7] installer: Bypass connectivity check when
 /tmp/installer-assume-online exists.
Date: Sat, 22 Feb 2020 00:20:27 +0100
This is useful for automated tests.

* gnu/installer/newt/network.scm (wait-service-online)[online?]: New
procedure.  Check for /tmp/installer-assume-online.
Use it instead of 'connman-online?'.
---
 gnu/installer/newt/network.scm | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/gnu/installer/newt/network.scm b/gnu/installer/newt/network.scm
index 40d85817b6..461d5d99c0 100644
--- a/gnu/installer/newt/network.scm
+++ b/gnu/installer/newt/network.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018 Mathieu Othacehe <m.othacehe <at> gmail.com>
-;;; Copyright © 2019 Ludovic Courtès <ludo <at> gnu.org>
+;;; Copyright © 2019, 2020 Ludovic Courtès <ludo <at> gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -119,6 +119,10 @@ network devices were found. Do you want to continue anyway?"))
 (define (wait-service-online)
   "Display a newt scale until connman detects an Internet access. Do
 FULL-VALUE tentatives, spaced by 1 second."
+  (define (online?)
+    (or (connman-online?)
+        (file-exists? "/tmp/installer-assume-online")))
+
   (let* ((full-value 5))
     (run-scale-page
      #:title (G_ "Checking connectivity")
@@ -127,10 +131,10 @@ FULL-VALUE tentatives, spaced by 1 second."
      #:scale-update-proc
      (lambda (value)
        (sleep 1)
-       (if (connman-online?)
+       (if (online?)
            full-value
            (+ value 1))))
-    (unless (connman-online?)
+    (unless (online?)
       (run-error-page
        (G_ "The selected network does not provide access to the \
 Internet, please try again.")
-- 
2.25.1





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bug#39729; Package guix-patches. (Fri, 21 Feb 2020 23:21:03 GMT) Full text and rfc822 format available.

Message #17 received at 39729 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: 39729 <at> debbugs.gnu.org
Cc: Ludovic Courtès <ludo <at> gnu.org>
Subject: [PATCH 3/7] installer: Implement a dialog on
 /var/guix/installer-socket.
Date: Sat, 22 Feb 2020 00:20:26 +0100
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/final.scm     |  40 ++-
 gnu/installer/newt/page.scm      | 564 ++++++++++++++++++++-----------
 gnu/installer/newt/partition.scm |   8 +-
 gnu/installer/newt/user.scm      |  64 ++--
 gnu/installer/newt/welcome.scm   |  44 ++-
 gnu/installer/steps.scm          |  25 +-
 gnu/installer/utils.scm          |  88 ++++-
 7 files changed, 581 insertions(+), 252 deletions(-)

diff --git a/gnu/installer/newt/final.scm b/gnu/installer/newt/final.scm
index 405eee2540..5cb4f6816d 100644
--- a/gnu/installer/newt/final.scm
+++ b/gnu/installer/newt/final.scm
@@ -63,28 +63,38 @@ This will take a few minutes.")
          (&installer-step-abort)))))))
 
 (define (run-install-success-page)
-  (message-window
-   (G_ "Installation complete")
-   (G_ "Reboot")
-   (G_ "Congratulations!  Installation is now complete.  \
+  (match (current-clients)
+    (()
+     (message-window
+      (G_ "Installation complete")
+      (G_ "Reboot")
+      (G_ "Congratulations!  Installation is now complete.  \
 You may remove the device containing the installation image and \
-press the button to reboot."))
+press the button to reboot.")))
+    (_
+     ;; When there are clients connected, send them a message and keep going.
+     (send-to-clients '(installation-complete))))
 
   ;; Return success so that the installer happily reboots.
   'success)
 
 (define (run-install-failed-page)
-  (match (choice-window
-          (G_ "Installation failed")
-          (G_ "Resume")
-          (G_ "Restart the installer")
-          (G_ "The final system installation step failed.  You can resume from \
+  (match (current-clients)
+    (()
+     (match (choice-window
+             (G_ "Installation failed")
+             (G_ "Resume")
+             (G_ "Restart the installer")
+             (G_ "The final system installation step failed.  You can resume from \
 a specific step, or restart the installer."))
-    (1 (raise
-        (condition
-         (&installer-step-abort))))
-    (2
-     ;; Keep going, the installer will be restarted later on.
+       (1 (raise
+           (condition
+            (&installer-step-abort))))
+       (2
+        ;; Keep going, the installer will be restarted later on.
+        #t)))
+    (_
+     (send-to-clients '(installation-failure))
      #t)))
 
 (define* (run-install-shell locale
diff --git a/gnu/installer/newt/page.scm b/gnu/installer/newt/page.scm
index 8aea5a1109..c01124aa0d 100644
--- a/gnu/installer/newt/page.scm
+++ b/gnu/installer/newt/page.scm
@@ -19,6 +19,7 @@
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (gnu installer newt page)
+  #:use-module (gnu installer steps)
   #:use-module (gnu installer utils)
   #:use-module (gnu installer newt utils)
   #:use-module (guix i18n)
@@ -26,7 +27,10 @@
   #:use-module (ice-9 match)
   #:use-module (ice-9 receive)
   #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-11)
   #:use-module (srfi srfi-26)
+  #:use-module (srfi srfi-34)
+  #:use-module (srfi srfi-35)
   #:use-module (newt)
   #:export (draw-info-page
             draw-connecting-page
@@ -36,7 +40,9 @@
             run-listbox-selection-page
             run-scale-page
             run-checkbox-tree-page
-            run-file-textbox-page))
+            run-file-textbox-page
+
+            run-form-with-clients))
 
 ;;; Commentary:
 ;;;
@@ -49,9 +55,123 @@
 ;;;
 ;;; Code:
 
+(define* (watch-clients! form #:optional (clients (current-clients)))
+  "Have FORM watch the file descriptors corresponding to current client
+connections.  Consequently, FORM may exit with the 'exit-fd-ready' reason."
+  (when (current-server-socket)
+    (form-watch-fd form (fileno (current-server-socket))
+                   FD-READ))
+
+  (for-each (lambda (client)
+              (form-watch-fd form (fileno client)
+                             (logior FD-READ FD-EXCEPT)))
+            clients))
+
+(define close-port-and-reuse-fd
+  (let ((bit-bucket #f))
+    (lambda (port)
+      "Close PORT and redirect its underlying FD to point to a valid open file
+descriptor."
+      (let ((fd (fileno port)))
+        (unless bit-bucket
+          (set! bit-bucket (car (pipe))))
+        (close-port port)
+
+        ;; FIXME: We're leaking FD.
+        (dup2 (fileno bit-bucket) fd)))))
+
+(define* (run-form-with-clients form exp)
+  "Run FORM such as it watches the file descriptors beneath CLIENTS after
+sending EXP to all the clients.
+
+Automatically restart the form when it exits with 'exit-fd-ready but without
+an actual client reply--e.g., it got a connection request or a client
+disconnect.
+
+Like 'run-form', return two values: the exit reason, and an \"argument\"."
+  (define* (discard-client! port #:optional errno)
+    (if errno
+        (syslog "removing client ~d due to ~s~%"
+                (fileno port) (strerror errno))
+        (syslog "removing client ~d due to EOF~%"
+                (fileno port)))
+
+    ;; XXX: Watch out!  There's no 'form-unwatch-fd' procedure in Newt so we
+    ;; cheat: we keep PORT's file descriptor open, but make it a duplicate of
+    ;; a valid but inactive FD.  Failing to do that, 'run-form' would
+    ;; select(2) on the now-closed port and keep spinning as select(2) returns
+    ;; EBADF.
+    (close-port-and-reuse-fd port)
+
+    (current-clients (delq port (current-clients)))
+    (close-port port))
+
+  (define title
+    ;; Title of FORM.
+    (match exp
+      (((? symbol? tag) alist ...)
+       (match (assq 'title alist)
+         ((_ title) title)
+         (_         tag)))
+      (((? symbol? tag) _ ...)
+       tag)
+      (_
+       'unknown)))
+
+  ;; Send EXP to all the currently-connected clients.
+  (send-to-clients exp)
+
+  (let loop ()
+    (syslog "running form ~s (~s) with ~d clients~%"
+            form title (length (current-clients)))
+
+    ;; Call 'watch-clients!' within the loop because there might be new
+    ;; clients.
+    (watch-clients! form)
+
+    (let-values (((reason argument) (run-form form)))
+      (match reason
+        ('exit-fd-ready
+         (match (fdes->ports argument)
+           ((port _ ...)
+            (if (memq port (current-clients))
+
+                ;; Read a reply from a client or handle its departure.
+                (catch 'system-error
+                  (lambda ()
+                    (match (read port)
+                      ((? eof-object? eof)
+                       (discard-client! port)
+                       (loop))
+                      (obj
+                       (syslog "form ~s (~s): client ~d replied ~s~%"
+                               form title (fileno port) obj)
+                       (values 'exit-fd-ready obj))))
+                  (lambda args
+                    (discard-client! port (system-error-errno args))
+                    (loop)))
+
+                ;; Accept a new client and send it EXP.
+                (match (accept port)
+                  ((client . _)
+                   (syslog "accepting new client ~d while on form ~s~%"
+                           (fileno client) form)
+                   (catch 'system-error
+                     (lambda ()
+                       (write exp client)
+                       (newline client)
+                       (force-output client)
+                       (current-clients (cons client (current-clients))))
+                     (lambda _
+                       (close-port client)))
+                   (loop)))))))
+        (_
+         (values reason argument))))))
+
 (define (draw-info-page text title)
   "Draw an informative page with the given TEXT as content.  Set the title of
 this page to TITLE."
+  (send-to-clients `(info (title ,title) (text ,text)))
   (let* ((text-box
           (make-reflowed-textbox -1 -1 text 40
                                  #:flags FLAG-BORDER))
@@ -126,20 +246,25 @@ input box, such as FLAG-PASSWORD."
                                         (G_ "Empty input")))))
       (let loop ()
         (receive (exit-reason argument)
-            (run-form form)
-          (let ((input (entry-value input-entry)))
-            (if (and (not allow-empty-input?)
-                     (eq? exit-reason 'exit-component)
-                     (string=? input ""))
-                (begin
-                  ;; Display the error page.
-                  (error-page)
-                  ;; Set the focus back to the input input field.
-                  (set-current-component form input-entry)
-                  (loop))
-                (begin
-                  (destroy-form-and-pop form)
-                  input))))))))
+            (run-form-with-clients form
+                                   `(input (title ,title) (text ,text)
+                                           (default ,default-text)))
+          (let ((input (if (eq? exit-reason 'exit-fd-ready)
+                           argument
+                           (entry-value input-entry))))
+            (cond ((not input)                 ;client disconnect or something
+                   (loop))
+                  ((and (not allow-empty-input?)
+                        (eq? exit-reason 'exit-component)
+                        (string=? input ""))
+                   ;; Display the error page.
+                   (error-page)
+                   ;; Set the focus back to the input input field.
+                   (set-current-component form input-entry)
+                   (loop))
+                  (else
+                   (destroy-form-and-pop form)
+                   input))))))))
 
 (define (run-error-page text title)
   "Run a page to inform the user of an error. The page contains the given TEXT
@@ -160,7 +285,8 @@ of the page is set to TITLE."
     (newt-set-color COLORSET-ROOT "white" "red")
     (add-components-to-form form text-box ok-button)
     (make-wrapped-grid-window grid title)
-    (run-form form)
+    (run-form-with-clients form
+                           `(error (title ,title) (text ,text)))
     ;; Restore the background to its original color.
     (newt-set-color COLORSET-ROOT "white" "blue")
     (destroy-form-and-pop form)))
@@ -187,17 +313,23 @@ of the page is set to TITLE."
     (make-wrapped-grid-window grid title)
 
     (receive (exit-reason argument)
-        (run-form form)
+        (run-form-with-clients form
+                               `(confirmation (title ,title)
+                                              (text ,text)))
       (dynamic-wind
         (const #t)
         (lambda ()
-          (case exit-reason
-            ((exit-component)
+          (match exit-reason
+            ('exit-component
              (cond
               ((components=? argument ok-button)
                #t)
               ((components=? argument exit-button)
-               (exit-button-procedure))))))
+               (exit-button-procedure))))
+            ('exit-fd-ready
+             (if argument
+                 #t
+                 (exit-button-procedure)))))
         (lambda ()
           (destroy-form-and-pop form))))))
 
@@ -222,6 +354,8 @@ of the page is set to TITLE."
                                       (const #t))
                                      (listbox-callback-procedure
                                       identity)
+                                     (client-callback-procedure
+                                      listbox-callback-procedure)
                                      (hotkey-callback-procedure
                                       (const #t)))
   "Run a page asking the user to select an item in a listbox. The page
@@ -254,9 +388,9 @@ Each time the listbox current item changes, call SKIP-ITEM-PROCEDURE? with the
 current listbox item as argument. If it returns #t, skip the element and jump
 to the next/previous one depending on the previous item, otherwise do
 nothing."
-
-  (define (fill-listbox listbox items)
-    "Append the given ITEMS to LISTBOX, once they have been converted to text
+  (let loop ()
+    (define (fill-listbox listbox items)
+      "Append the given ITEMS to LISTBOX, once they have been converted to text
 with LISTBOX-ITEM->TEXT. Each item appended to the LISTBOX is given a key by
 newt. Save this key by returning an association list under the form:
 
@@ -264,144 +398,165 @@ newt. Save this key by returning an association list under the form:
 
 where NEWT-LISTBOX-KEY is the key returned by APPEND-ENTRY-TO-LISTBOX, when
 ITEM was inserted into LISTBOX."
-    (map (lambda (item)
-           (let* ((text (listbox-item->text item))
-                  (key (append-entry-to-listbox listbox text)))
-             (cons key item)))
-         items))
+      (map (lambda (item)
+             (let* ((text (listbox-item->text item))
+                    (key (append-entry-to-listbox listbox text)))
+               (cons key item)))
+           items))
 
-  (define (sort-listbox-items listbox-items)
-    "Return LISTBOX-ITEMS sorted using the 'string-locale<?' procedure on the text
+    (define (sort-listbox-items listbox-items)
+      "Return LISTBOX-ITEMS sorted using the 'string-locale<?' procedure on the text
 corresponding to each item in the list."
-    (let* ((items (map (lambda (item)
-                         (cons item (listbox-item->text item)))
-                       listbox-items))
-           (sorted-items
-            (sort items (lambda (a b)
-                          (let ((text-a (cdr a))
-                                (text-b (cdr b)))
-                            (string-locale<? text-a text-b))))))
-      (map car sorted-items)))
+      (let* ((items (map (lambda (item)
+                           (cons item (listbox-item->text item)))
+                         listbox-items))
+             (sorted-items
+              (sort items (lambda (a b)
+                            (let ((text-a (cdr a))
+                                  (text-b (cdr b)))
+                              (string-locale<? text-a text-b))))))
+        (map car sorted-items)))
 
-  ;; Store the last selected listbox item's key.
-  (define last-listbox-key (make-parameter #f))
+    ;; Store the last selected listbox item's key.
+    (define last-listbox-key (make-parameter #f))
 
-  (define (previous-key keys key)
-    (let ((index (list-index (cut eq? key <>) keys)))
-      (and index
-           (> index 0)
-           (list-ref keys (- index 1)))))
+    (define (previous-key keys key)
+      (let ((index (list-index (cut eq? key <>) keys)))
+        (and index
+             (> index 0)
+             (list-ref keys (- index 1)))))
 
-  (define (next-key keys key)
-    (let ((index (list-index (cut eq? key <>) keys)))
-      (and index
-           (< index (- (length keys) 1))
-           (list-ref keys (+ index 1)))))
+    (define (next-key keys key)
+      (let ((index (list-index (cut eq? key <>) keys)))
+        (and index
+             (< index (- (length keys) 1))
+             (list-ref keys (+ index 1)))))
 
-  (define (set-default-item listbox listbox-keys default-item)
-    "Set the default item of LISTBOX to DEFAULT-ITEM. LISTBOX-KEYS is the
+    (define (set-default-item listbox listbox-keys default-item)
+      "Set the default item of LISTBOX to DEFAULT-ITEM. LISTBOX-KEYS is the
 association list returned by the FILL-LISTBOX procedure. It is used because
 the current listbox item has to be selected by key."
-    (for-each (match-lambda
-                ((key . item)
-                 (when (equal? item default-item)
-                   (set-current-listbox-entry-by-key listbox key))))
-              listbox-keys))
+      (for-each (match-lambda
+                  ((key . item)
+                   (when (equal? item default-item)
+                     (set-current-listbox-entry-by-key listbox key))))
+                listbox-keys))
 
-  (let* ((listbox (make-listbox
-                   -1 -1
-                   listbox-height
-                   (logior FLAG-SCROLL FLAG-BORDER FLAG-RETURNEXIT
-                           (if listbox-allow-multiple?
-                               FLAG-MULTIPLE
-                               0))))
-         (form (make-form #:flags FLAG-NOF12))
-         (info-textbox
-          (make-reflowed-textbox -1 -1 info-text
-                                 info-textbox-width
-                                 #:flags FLAG-BORDER))
-         (button (make-button -1 -1 button-text))
-         (button2 (and button2-text
-                       (make-button -1 -1 button2-text)))
-         (grid (vertically-stacked-grid
-                GRID-ELEMENT-COMPONENT info-textbox
-                GRID-ELEMENT-COMPONENT listbox
-                GRID-ELEMENT-SUBGRID
-                (apply
-                 horizontal-stacked-grid
-                 GRID-ELEMENT-COMPONENT button
-                 `(,@(if button2
-                         (list GRID-ELEMENT-COMPONENT button2)
-                         '())))))
-         (sorted-items (if sort-listbox-items?
-                           (sort-listbox-items listbox-items)
-                           listbox-items))
-         (keys (fill-listbox listbox sorted-items)))
+    (let* ((listbox (make-listbox
+                     -1 -1
+                     listbox-height
+                     (logior FLAG-SCROLL FLAG-BORDER FLAG-RETURNEXIT
+                             (if listbox-allow-multiple?
+                                 FLAG-MULTIPLE
+                                 0))))
+           (form (make-form #:flags FLAG-NOF12))
+           (info-textbox
+            (make-reflowed-textbox -1 -1 info-text
+                                   info-textbox-width
+                                   #:flags FLAG-BORDER))
+           (button (make-button -1 -1 button-text))
+           (button2 (and button2-text
+                         (make-button -1 -1 button2-text)))
+           (grid (vertically-stacked-grid
+                  GRID-ELEMENT-COMPONENT info-textbox
+                  GRID-ELEMENT-COMPONENT listbox
+                  GRID-ELEMENT-SUBGRID
+                  (apply
+                   horizontal-stacked-grid
+                   GRID-ELEMENT-COMPONENT button
+                   `(,@(if button2
+                           (list GRID-ELEMENT-COMPONENT button2)
+                           '())))))
+           (sorted-items (if sort-listbox-items?
+                             (sort-listbox-items listbox-items)
+                             listbox-items))
+           (keys (fill-listbox listbox sorted-items)))
 
-    ;; On every listbox element change, check if we need to skip it. If yes,
-    ;; depending on the 'last-listbox-key', jump forward or backward. If no,
-    ;; do nothing.
-    (add-component-callback
-     listbox
-     (lambda (component)
-       (let* ((current-key (current-listbox-entry listbox))
-              (listbox-keys (map car keys))
-              (last-key (last-listbox-key))
-              (item (assoc-ref keys current-key))
-              (prev-key (previous-key listbox-keys current-key))
-              (next-key (next-key listbox-keys current-key)))
-         ;; Update last-listbox-key before a potential call to
-         ;; set-current-listbox-entry-by-key, because it will immediately
-         ;; cause this callback to be called for the new entry.
-         (last-listbox-key current-key)
-         (when (skip-item-procedure? item)
-           (when (eq? prev-key last-key)
-             (if next-key
-                 (set-current-listbox-entry-by-key listbox next-key)
-                 (set-current-listbox-entry-by-key listbox prev-key)))
-           (when (eq? next-key last-key)
-             (if prev-key
-                 (set-current-listbox-entry-by-key listbox prev-key)
-                 (set-current-listbox-entry-by-key listbox next-key)))))))
+      (define (choice->item str)
+        ;; Return the item that corresponds to STR.
+        (match (find (match-lambda
+                       ((key . item)
+                        (string=? str (listbox-item->text item))))
+                     keys)
+          ((key . item) item)
+          (#f (raise (condition (&installer-step-abort))))))
 
-    (when listbox-default-item
-      (set-default-item listbox keys listbox-default-item))
+      ;; On every listbox element change, check if we need to skip it. If yes,
+      ;; depending on the 'last-listbox-key', jump forward or backward. If no,
+      ;; do nothing.
+      (add-component-callback
+       listbox
+       (lambda (component)
+         (let* ((current-key (current-listbox-entry listbox))
+                (listbox-keys (map car keys))
+                (last-key (last-listbox-key))
+                (item (assoc-ref keys current-key))
+                (prev-key (previous-key listbox-keys current-key))
+                (next-key (next-key listbox-keys current-key)))
+           ;; Update last-listbox-key before a potential call to
+           ;; set-current-listbox-entry-by-key, because it will immediately
+           ;; cause this callback to be called for the new entry.
+           (last-listbox-key current-key)
+           (when (skip-item-procedure? item)
+             (when (eq? prev-key last-key)
+               (if next-key
+                   (set-current-listbox-entry-by-key listbox next-key)
+                   (set-current-listbox-entry-by-key listbox prev-key)))
+             (when (eq? next-key last-key)
+               (if prev-key
+                   (set-current-listbox-entry-by-key listbox prev-key)
+                   (set-current-listbox-entry-by-key listbox next-key)))))))
 
-    (when allow-delete?
-      (form-add-hotkey form KEY-DELETE))
+      (when listbox-default-item
+        (set-default-item listbox keys listbox-default-item))
 
-    (add-form-to-grid grid form #t)
-    (make-wrapped-grid-window grid title)
+      (when allow-delete?
+        (form-add-hotkey form KEY-DELETE))
 
-    (receive (exit-reason argument)
-        (run-form form)
-      (dynamic-wind
-        (const #t)
-        (lambda ()
-          (case exit-reason
-            ((exit-component)
-             (cond
-              ((components=? argument button)
-               (button-callback-procedure))
-              ((and button2
-                    (components=? argument button2))
-               (button2-callback-procedure))
-              ((components=? argument listbox)
-               (if listbox-allow-multiple?
-                   (let* ((entries (listbox-selection listbox))
-                          (items (map (lambda (entry)
-                                        (assoc-ref keys entry))
-                                      entries)))
-                     (listbox-callback-procedure items))
-                   (let* ((entry (current-listbox-entry listbox))
-                          (item (assoc-ref keys entry)))
-                     (listbox-callback-procedure item))))))
-            ((exit-hotkey)
-             (let* ((entry (current-listbox-entry listbox))
-                    (item (assoc-ref keys entry)))
-               (hotkey-callback-procedure argument item)))))
-        (lambda ()
-          (destroy-form-and-pop form))))))
+      (add-form-to-grid grid form #t)
+      (make-wrapped-grid-window grid title)
+
+      (receive (exit-reason argument)
+          (run-form-with-clients form
+                                 `(list-selection (title ,title)
+                                                  (multiple-choices?
+                                                   ,listbox-allow-multiple?)
+                                                  (items
+                                                   ,(map listbox-item->text
+                                                         listbox-items))))
+        (dynamic-wind
+          (const #t)
+          (lambda ()
+            (match exit-reason
+              ('exit-component
+               (cond
+                ((components=? argument button)
+                 (button-callback-procedure))
+                ((and button2
+                      (components=? argument button2))
+                 (button2-callback-procedure))
+                ((components=? argument listbox)
+                 (if listbox-allow-multiple?
+                     (let* ((entries (listbox-selection listbox))
+                            (items (map (lambda (entry)
+                                          (assoc-ref keys entry))
+                                        entries)))
+                       (listbox-callback-procedure items))
+                     (let* ((entry (current-listbox-entry listbox))
+                            (item (assoc-ref keys entry)))
+                       (listbox-callback-procedure item))))))
+              ('exit-fd-ready
+               (let* ((choice argument)
+                      (item   (if listbox-allow-multiple?
+                                  (map choice->item choice)
+                                  (choice->item choice))))
+                 (client-callback-procedure item)))
+              ('exit-hotkey
+               (let* ((entry (current-listbox-entry listbox))
+                      (item (assoc-ref keys entry)))
+                 (hotkey-callback-procedure argument item)))))
+          (lambda ()
+            (destroy-form-and-pop form)))))))
 
 (define* (run-scale-page #:key
                          title
@@ -498,48 +653,65 @@ ITEMS when 'Ok' is pressed."
          items
          selection))
 
-  (let* ((checkbox-tree
-          (make-checkboxtree -1 -1
-                             checkbox-tree-height
-                             FLAG-BORDER))
-         (info-textbox
-          (make-reflowed-textbox -1 -1 info-text
-                                 info-textbox-width
-                                 #:flags FLAG-BORDER))
-         (ok-button (make-button -1 -1 (G_ "OK")))
-         (exit-button (make-button -1 -1 (G_ "Exit")))
-         (grid (vertically-stacked-grid
-                GRID-ELEMENT-COMPONENT info-textbox
-                GRID-ELEMENT-COMPONENT checkbox-tree
-                GRID-ELEMENT-SUBGRID
-                (horizontal-stacked-grid
-                 GRID-ELEMENT-COMPONENT ok-button
-                 GRID-ELEMENT-COMPONENT exit-button)))
-         (keys (fill-checkbox-tree checkbox-tree items))
-         (form (make-form #:flags FLAG-NOF12)))
+  (let loop ()
+    (let* ((checkbox-tree
+            (make-checkboxtree -1 -1
+                               checkbox-tree-height
+                               FLAG-BORDER))
+           (info-textbox
+            (make-reflowed-textbox -1 -1 info-text
+                                   info-textbox-width
+                                   #:flags FLAG-BORDER))
+           (ok-button (make-button -1 -1 (G_ "OK")))
+           (exit-button (make-button -1 -1 (G_ "Exit")))
+           (grid (vertically-stacked-grid
+                  GRID-ELEMENT-COMPONENT info-textbox
+                  GRID-ELEMENT-COMPONENT checkbox-tree
+                  GRID-ELEMENT-SUBGRID
+                  (horizontal-stacked-grid
+                   GRID-ELEMENT-COMPONENT ok-button
+                   GRID-ELEMENT-COMPONENT exit-button)))
+           (keys (fill-checkbox-tree checkbox-tree items))
+           (form (make-form #:flags FLAG-NOF12)))
 
-    (add-form-to-grid grid form #t)
-    (make-wrapped-grid-window grid title)
+      (define (choice->item str)
+        ;; Return the item that corresponds to STR.
+        (match (find (match-lambda
+                       ((key . item)
+                        (string=? str (item->text item))))
+                     keys)
+          ((key . item) item)
+          (#f (raise (condition (&installer-step-abort))))))
 
-    (receive (exit-reason argument)
-        (run-form form)
-      (dynamic-wind
-        (const #t)
-        (lambda ()
-          (case exit-reason
-            ((exit-component)
-             (cond
-              ((components=? argument ok-button)
-               (let* ((entries (current-checkbox-selection checkbox-tree))
-                      (current-items (map (lambda (entry)
-                                            (assoc-ref keys entry))
-                                          entries)))
-                 (ok-button-callback-procedure)
-                 current-items))
-              ((components=? argument exit-button)
-               (exit-button-callback-procedure))))))
-        (lambda ()
-          (destroy-form-and-pop form))))))
+      (add-form-to-grid grid form #t)
+      (make-wrapped-grid-window grid title)
+
+      (receive (exit-reason argument)
+          (run-form-with-clients form
+                                 `(checkbox-list (title ,title)
+                                                 (text ,info-text)
+                                                 (items
+                                                  ,(map item->text items))))
+        (dynamic-wind
+          (const #t)
+
+          (lambda ()
+            (match exit-reason
+              ('exit-component
+               (cond
+                ((components=? argument ok-button)
+                 (let* ((entries (current-checkbox-selection checkbox-tree))
+                        (current-items (map (lambda (entry)
+                                              (assoc-ref keys entry))
+                                            entries)))
+                   (ok-button-callback-procedure)
+                   current-items))
+                ((components=? argument exit-button)
+                 (exit-button-callback-procedure))))
+              ('exit-fd-ready
+               (map choice->item argument))))
+          (lambda ()
+            (destroy-form-and-pop form)))))))
 
 (define* (edit-file file #:key locale)
   "Spawn an editor for FILE."
@@ -606,13 +778,16 @@ ITEMS when 'Ok' is pressed."
                           text))
 
       (receive (exit-reason argument)
-          (run-form form)
+          (run-form-with-clients form
+                                 `(file-dialog (title ,title)
+                                               (text ,info-text)
+                                               (file ,file)))
         (define result
           (dynamic-wind
             (const #t)
             (lambda ()
-              (case exit-reason
-                ((exit-component)
+              (match exit-reason
+                ('exit-component
                  (cond
                   ((components=? argument ok-button)
                    (ok-button-callback-procedure))
@@ -621,10 +796,15 @@ ITEMS when 'Ok' is pressed."
                    (exit-button-callback-procedure))
                   ((and edit-button?
                         (components=? argument edit-button))
-                   (edit-file file))))))
+                   (edit-file file))))
+                ('exit-fd-ready
+                 (if argument
+                     (ok-button-callback-procedure)
+                     (exit-button-callback-procedure)))))
             (lambda ()
               (destroy-form-and-pop form))))
 
-        (if (components=? argument edit-button)
+        (if (and (eq? exit-reason 'exit-component)
+                 (components=? argument edit-button))
             (loop)                                ;recurse in tail position
             result)))))
diff --git a/gnu/installer/newt/partition.scm b/gnu/installer/newt/partition.scm
index 3cba7f77dd..c925e410a9 100644
--- a/gnu/installer/newt/partition.scm
+++ b/gnu/installer/newt/partition.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018, 2019 Mathieu Othacehe <m.othacehe <at> gmail.com>
-;;; Copyright © 2019 Ludovic Courtès <ludo <at> gnu.org>
+;;; Copyright © 2019, 2020 Ludovic Courtès <ludo <at> gnu.org>
 ;;; Copyright © 2020 Tobias Geerinckx-Rice <me <at> tobias.gr>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -682,6 +682,12 @@ by pressing the Exit button.~%~%")))
           #:allow-delete? #t
           #:button-text (G_ "OK")
           #:button-callback-procedure button-ok-action
+
+          ;; Consider client replies equivalent to hitting the "OK" button.
+          ;; XXX: In practice this means that clients cannot do anything but
+          ;; approve the predefined list of partitions.
+          #:client-callback-procedure (lambda (_) (button-ok-action))
+
           #:button2-text (G_ "Exit")
           #:button2-callback-procedure button-exit-action
           #:listbox-callback-procedure listbox-action
diff --git a/gnu/installer/newt/user.scm b/gnu/installer/newt/user.scm
index b01d52172b..ad711d665a 100644
--- a/gnu/installer/newt/user.scm
+++ b/gnu/installer/newt/user.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018 Mathieu Othacehe <m.othacehe <at> gmail.com>
-;;; Copyright © 2019 Ludovic Courtès <ludo <at> gnu.org>
+;;; Copyright © 2019, 2020 Ludovic Courtès <ludo <at> gnu.org>
 ;;; Copyright © 2019 Tobias Geerinckx-Rice <me <at> tobias.gr>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -23,6 +23,7 @@
   #:use-module ((gnu installer steps) #:select (&installer-step-abort))
   #:use-module (gnu installer newt page)
   #:use-module (gnu installer newt utils)
+  #:use-module (gnu installer utils)
   #:use-module (guix i18n)
   #:use-module (newt)
   #:use-module (ice-9 match)
@@ -115,6 +116,7 @@ REAL-NAME, and HOME-DIRECTORY as the initial values in the form."
                                GRID-ELEMENT-SUBGRID entry-grid
                                GRID-ELEMENT-SUBGRID button-grid)
                               title)
+
     (let ((error-page
            (lambda ()
              (run-error-page (G_ "Empty inputs are not allowed.")
@@ -230,33 +232,45 @@ administrator (\"root\").")
           (set-current-component form ok-button))
 
       (receive (exit-reason argument)
-          (run-form form)
+          (run-form-with-clients form '(add-users))
         (dynamic-wind
           (const #t)
           (lambda ()
-            (when (eq? exit-reason 'exit-component)
-              (cond
-               ((components=? argument add-button)
-                (run (cons (run-user-add-page) users)))
-               ((components=? argument del-button)
-                (let* ((current-user-key (current-listbox-entry listbox))
-                       (users
-                        (map (cut assoc-ref <> 'user)
-                             (remove (lambda (element)
-                                       (equal? (assoc-ref element 'key)
-                                               current-user-key))
-                                     listbox-elements))))
-                  (run users)))
-               ((components=? argument ok-button)
-                (when (null? users)
-                  (run-error-page (G_ "Please create at least one user.")
-                                  (G_ "No user"))
-                  (run users))
-                (reverse users))
-               ((components=? argument exit-button)
-                (raise
-                 (condition
-                  (&installer-step-abort)))))))
+            (match exit-reason
+              ('exit-component
+               (cond
+                ((components=? argument add-button)
+                 (run (cons (run-user-add-page) users)))
+                ((components=? argument del-button)
+                 (let* ((current-user-key (current-listbox-entry listbox))
+                        (users
+                         (map (cut assoc-ref <> 'user)
+                              (remove (lambda (element)
+                                        (equal? (assoc-ref element 'key)
+                                                current-user-key))
+                                      listbox-elements))))
+                   (run users)))
+                ((components=? argument ok-button)
+                 (when (null? users)
+                   (run-error-page (G_ "Please create at least one user.")
+                                   (G_ "No user"))
+                   (run users))
+                 (reverse users))
+                ((components=? argument exit-button)
+                 (raise
+                  (condition
+                   (&installer-step-abort))))))
+              ('exit-fd-ready
+               ;; Read the complete user list at once.
+               (match argument
+                 ((('user ('name names) ('real-name real-names)
+                          ('home-directory homes) ('password passwords))
+                   ..1)
+                  (map (lambda (name real-name home password)
+                         (user (name name) (real-name real-name)
+                               (home-directory home)
+                               (password password)))
+                       names real-names homes passwords))))))
           (lambda ()
             (destroy-form-and-pop form))))))
 
diff --git a/gnu/installer/newt/welcome.scm b/gnu/installer/newt/welcome.scm
index aec3e7a612..1b4b2df816 100644
--- a/gnu/installer/newt/welcome.scm
+++ b/gnu/installer/newt/welcome.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018 Mathieu Othacehe <m.othacehe <at> gmail.com>
+;;; Copyright © 2020 Ludovic Courtès <ludo <at> gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -11,16 +12,20 @@
 ;;; GNU Guix is distributed in the hope that it will be useful, but
 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-
 ;;;
 ;;; You should have received a copy of the GNU General Public License
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (gnu installer newt welcome)
+  #:use-module (gnu installer steps)
   #:use-module (gnu installer utils)
+  #:use-module (gnu installer newt page)
   #:use-module (gnu installer newt utils)
   #:use-module (guix build syscalls)
   #:use-module (guix i18n)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-34)
+  #:use-module (srfi srfi-35)
   #:use-module (ice-9 match)
   #:use-module (ice-9 receive)
   #:use-module (newt)
@@ -66,24 +71,43 @@ we want this page to occupy all the screen space available."
                 GRID-ELEMENT-COMPONENT options-listbox))
          (form (make-form)))
 
+    (define (choice->item str)
+      ;; Return the item that corresponds to STR.
+      (match (find (match-lambda
+                     ((key . item)
+                      (string=? str (listbox-item->text item))))
+                   keys)
+        ((key . item) item)
+        (#f (raise (condition (&installer-step-abort))))))
+
     (set-textbox-text logo-textbox (read-all logo))
 
     (add-form-to-grid grid form #t)
     (make-wrapped-grid-window grid title)
 
     (receive (exit-reason argument)
-        (run-form form)
+        (run-form-with-clients form
+                               `(menu (title ,title)
+                                      (text ,info-text)
+                                      (items
+                                       ,(map listbox-item->text
+                                             listbox-items))))
       (dynamic-wind
         (const #t)
         (lambda ()
-          (when (eq? exit-reason 'exit-component)
-            (cond
-             ((components=? argument options-listbox)
-              (let* ((entry (current-listbox-entry options-listbox))
-                     (item (assoc-ref keys entry)))
-                (match item
-                  ((text . proc)
-                   (proc))))))))
+          (match exit-reason
+            ('exit-component
+             (let* ((entry (current-listbox-entry options-listbox))
+                    (item (assoc-ref keys entry)))
+               (match item
+                 ((text . proc)
+                  (proc)))))
+            ('exit-fd-ready
+             (let* ((choice argument)
+                    (item   (choice->item choice)))
+               (match item
+                 ((text . proc)
+                  (proc)))))))
         (lambda ()
           (destroy-form-and-pop form))))))
 
diff --git a/gnu/installer/steps.scm b/gnu/installer/steps.scm
index b2fc819d89..0b6d8e4649 100644
--- a/gnu/installer/steps.scm
+++ b/gnu/installer/steps.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018, 2019 Mathieu Othacehe <m.othacehe <at> gmail.com>
+;;; Copyright © 2020 Ludovic Courtès <ludo <at> gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -19,6 +20,7 @@
 (define-module (gnu installer steps)
   #:use-module (guix records)
   #:use-module (guix build utils)
+  #:use-module (gnu installer utils)
   #:use-module (ice-9 match)
   #:use-module (ice-9 pretty-print)
   #:use-module (srfi srfi-1)
@@ -185,13 +187,18 @@ return the accumalated result so far."
                 #:todo-steps rest-steps
                 #:done-steps (append done-steps (list step))))))))
 
-  (call-with-prompt 'raise-above
-    (lambda ()
-      (run '()
-           #:todo-steps steps
-           #:done-steps '()))
-    (lambda (k condition)
-      (raise condition))))
+  ;; Ignore SIGPIPE so that we don't die if a client closes the connection
+  ;; prematurely.
+  (sigaction SIGPIPE SIG_IGN)
+
+  (with-server-socket
+    (call-with-prompt 'raise-above
+      (lambda ()
+        (run '()
+             #:todo-steps steps
+             #:done-steps '()))
+      (lambda (k condition)
+        (raise condition)))))
 
 (define (find-step-by-id steps id)
   "Find and return the step in STEPS whose id is equal to ID."
@@ -249,3 +256,7 @@ found in RESULTS."
                       (pretty-print part port)))
                 configuration)
       (flush-output-port port))))
+
+;;; Local Variables:
+;;; eval: (put 'with-server-socket 'scheme-indent-function 0)
+;;; End:
diff --git a/gnu/installer/utils.scm b/gnu/installer/utils.scm
index 842bd02ced..4dc26374b1 100644
--- a/gnu/installer/utils.scm
+++ b/gnu/installer/utils.scm
@@ -21,7 +21,9 @@
   #:use-module (guix utils)
   #:use-module (guix build utils)
   #:use-module (guix i18n)
+  #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-34)
+  #:use-module (ice-9 match)
   #:use-module (ice-9 rdelim)
   #:use-module (ice-9 regex)
   #:use-module (ice-9 format)
@@ -33,7 +35,12 @@
             run-shell-command
 
             syslog-port
-            syslog))
+            syslog
+
+            with-server-socket
+            current-server-socket
+            current-clients
+            send-to-clients))
 
 (define* (read-lines #:optional (port (current-input-port)))
   "Read lines from PORT and return them as a list."
@@ -66,7 +73,11 @@ number. If no percentage is found, return #f"
 COMMAND exited successfully, #f otherwise."
   (define (pause)
     (format #t (G_ "Press Enter to continue.~%"))
-    (read-line (current-input-port)))
+    (send-to-clients '(pause))
+    (match (select (cons (current-input-port) (current-clients))
+             '() '())
+      (((port _ ...) _ _)
+       (read-line port))))
 
   (call-with-temporary-output-file
    (lambda (file port)
@@ -134,3 +145,76 @@ COMMAND exited successfully, #f otherwise."
        (with-syntax ((fmt (string-append "installer[~d]: "
                                          (syntax->datum #'fmt))))
          #'(format (syslog-port) fmt (getpid) args ...))))))
+
+
+;;;
+;;; Client protocol.
+;;;
+
+(define %client-socket-file
+  ;; Unix-domain socket where the installer accepts connections.
+  "/var/guix/installer-socket")
+
+(define current-server-socket
+  ;; Socket on which the installer is currently accepting connections, or #f.
+  (make-parameter #f))
+
+(define current-clients
+  ;; List of currently connected clients.
+  (make-parameter '()))
+
+(define* (open-server-socket
+          #:optional (socket-file %client-socket-file))
+  "Open SOCKET-FILE as a Unix-domain socket to accept incoming connections and
+return it."
+  (mkdir-p (dirname socket-file))
+  (when (file-exists? socket-file)
+    (delete-file socket-file))
+  (let ((sock (socket AF_UNIX SOCK_STREAM 0)))
+    (bind sock AF_UNIX socket-file)
+    (listen sock 0)
+    sock))
+
+(define (call-with-server-socket thunk)
+  (if (current-server-socket)
+      (thunk)
+      (let ((socket (open-server-socket)))
+        (dynamic-wind
+          (const #t)
+          (lambda ()
+            (parameterize ((current-server-socket socket))
+              (thunk)))
+          (lambda ()
+            (close-port socket))))))
+
+(define-syntax-rule (with-server-socket exp ...)
+  "Evaluate EXP with 'current-server-socket' parameterized to a currently
+accepting socket."
+  (call-with-server-socket (lambda () exp ...)))
+
+(define* (send-to-clients exp)
+  "Send EXP to all the current clients."
+  (define remainder
+    (fold (lambda (client remainder)
+            (catch 'system-error
+              (lambda ()
+                (write exp client)
+                (newline client)
+                (force-output client)
+                (cons client remainder))
+              (lambda args
+                ;; We might get EPIPE if the client disconnects; when that
+                ;; happens, remove CLIENT from the set of available clients.
+                (let ((errno (system-error-errno args)))
+                  (if (memv errno (list EPIPE ECONNRESET ECONNABORTED))
+                      (begin
+                        (syslog "removing client ~s due to ~s while replying~%"
+                                (fileno client) (strerror errno))
+                        (false-if-exception (close-port client))
+                        remainder)
+                      (cons client remainder))))))
+          '()
+          (current-clients)))
+
+  (current-clients (reverse remainder))
+  exp)
-- 
2.25.1





Information forwarded to guix-patches <at> gnu.org:
bug#39729; Package guix-patches. (Fri, 21 Feb 2020 23:21:03 GMT) Full text and rfc822 format available.

Message #20 received at 39729 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: 39729 <at> debbugs.gnu.org
Cc: Ludovic Courtès <ludo <at> gnu.org>
Subject: [PATCH 5/7] installer: Run commands without hopping through the shell.
Date: Sat, 22 Feb 2020 00:20:28 +0100
* gnu/installer/utils.scm (run-shell-command): Rename to...
(run-command): Remove call to 'call-with-temporary-output-file' and hop
through Bash.  Expect COMMAND to be a list of strings rather than a
string.
* gnu/installer/final.scm (install-system): Turn INSTALL-COMMAND into a
list of strings and pass it to 'run-command'.
* gnu/installer/newt/page.scm (edit-file): Likewise.
---
 gnu/installer/final.scm     | 11 +++----
 gnu/installer/newt/page.scm |  5 ++-
 gnu/installer/utils.scm     | 64 ++++++++++++++++++-------------------
 3 files changed, 39 insertions(+), 41 deletions(-)

diff --git a/gnu/installer/final.scm b/gnu/installer/final.scm
index 8c2185e36f..7193ecb8a4 100644
--- a/gnu/installer/final.scm
+++ b/gnu/installer/final.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018, 2020 Mathieu Othacehe <m.othacehe <at> gmail.com>
-;;; Copyright © 2019 Ludovic Courtès <ludo <at> gnu.org>
+;;; Copyright © 2019, 2020 Ludovic Courtès <ludo <at> gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -111,10 +111,9 @@ cow-store service."
 Start COW-STORE service on target directory and launch guix install command in
 a subshell.  LOCALE must be the locale name under which that command will run,
 or #f.  Return #t on success and #f on failure."
-  (let ((install-command
-         (format #f "guix system init --fallback ~a ~a"
-                 (%installer-configuration-file)
-                 (%installer-target-dir))))
+  (let ((install-command (list "guix" "system" "init" "--fallback"
+                               (%installer-configuration-file)
+                               (%installer-target-dir))))
     (mkdir-p (%installer-target-dir))
 
     ;; We want to initialize user passwords but we don't want to store them in
@@ -128,7 +127,7 @@ or #f.  Return #t on success and #f on failure."
       (lambda ()
         (start-service 'cow-store (list (%installer-target-dir))))
       (lambda ()
-        (run-shell-command install-command #:locale locale))
+        (run-command install-command #:locale locale))
       (lambda ()
         (stop-service 'cow-store)
         ;; Remove the store overlay created at cow-store service start.
diff --git a/gnu/installer/newt/page.scm b/gnu/installer/newt/page.scm
index c01124aa0d..9031c7d4ba 100644
--- a/gnu/installer/newt/page.scm
+++ b/gnu/installer/newt/page.scm
@@ -719,9 +719,8 @@ ITEMS when 'Ok' is pressed."
   (newt-suspend)
   ;; Use Nano because it syntax-highlights Scheme by default.
   ;; TODO: Add a menu to choose an editor?
-  (run-shell-command (string-append "/run/current-system/profile/bin/nano "
-                                    file)
-                     #:locale locale)
+  (run-command (list "/run/current-system/profile/bin/nano" file)
+               #:locale locale)
   (newt-resume))
 
 (define* (run-file-textbox-page #:key
diff --git a/gnu/installer/utils.scm b/gnu/installer/utils.scm
index 4dc26374b1..0a91ae1e4a 100644
--- a/gnu/installer/utils.scm
+++ b/gnu/installer/utils.scm
@@ -32,7 +32,7 @@
             read-all
             nearest-exact-integer
             read-percentage
-            run-shell-command
+            run-command
 
             syslog-port
             syslog
@@ -68,48 +68,48 @@ number. If no percentage is found, return #f"
     (and result
          (string->number (match:substring result 1)))))
 
-(define* (run-shell-command command #:key locale)
-  "Run COMMAND, a string, with Bash, and in the given LOCALE.  Return true if
+(define* (run-command command #:key locale)
+  "Run COMMAND, a list of strings, in the given LOCALE.  Return true if
 COMMAND exited successfully, #f otherwise."
+  (define env (environ))
+
   (define (pause)
     (format #t (G_ "Press Enter to continue.~%"))
     (send-to-clients '(pause))
+    (environ env)                               ;restore environment variables
     (match (select (cons (current-input-port) (current-clients))
              '() '())
       (((port _ ...) _ _)
        (read-line port))))
 
-  (call-with-temporary-output-file
-   (lambda (file port)
-     (when locale
-       (let ((supported? (false-if-exception
-                          (setlocale LC_ALL locale))))
-         ;; If LOCALE is not supported, then set LANGUAGE, which might at
-         ;; least give us translated messages.
-         (if supported?
-             (format port "export LC_ALL=\"~a\"~%" locale)
-             (format port "export LANGUAGE=\"~a\"~%"
-                     (string-take locale
-                                  (string-index locale #\_))))))
+  (setenv "PATH" "/run/current-system/profile/bin")
 
-     (format port "exec ~a~%" command)
-     (close port)
+  (when locale
+    (let ((supported? (false-if-exception
+                       (setlocale LC_ALL locale))))
+      ;; If LOCALE is not supported, then set LANGUAGE, which might at
+      ;; least give us translated messages.
+      (if supported?
+          (setenv "LC_ALL" locale)
+          (setenv "LANGUAGE"
+                  (string-take locale
+                               (string-index locale #\_))))))
 
-     (guard (c ((invoke-error? c)
-                (newline)
-                (format (current-error-port)
-                        (G_ "Command failed with exit code ~a.~%")
-                        (invoke-error-exit-status c))
-                (syslog "command ~s failed with exit code ~a"
-                        command (invoke-error-exit-status c))
-                (pause)
-                #f))
-       (syslog "running command ~s~%" command)
-       (invoke "bash" "--init-file" file)
-       (syslog "command ~s succeeded~%" command)
-       (newline)
-       (pause)
-       #t))))
+  (guard (c ((invoke-error? c)
+             (newline)
+             (format (current-error-port)
+                     (G_ "Command failed with exit code ~a.~%")
+                     (invoke-error-exit-status c))
+             (syslog "command ~s failed with exit code ~a"
+                     command (invoke-error-exit-status c))
+             (pause)
+             #f))
+    (syslog "running command ~s~%" command)
+    (apply invoke command)
+    (syslog "command ~s succeeded~%" command)
+    (newline)
+    (pause)
+    #t))
 
 
 ;;;
-- 
2.25.1





Information forwarded to guix-patches <at> gnu.org:
bug#39729; Package guix-patches. (Fri, 21 Feb 2020 23:21:04 GMT) Full text and rfc822 format available.

Message #23 received at 39729 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: 39729 <at> debbugs.gnu.org
Cc: Ludovic Courtès <ludo <at> gnu.org>
Subject: [PATCH 6/7] installer: Honor /tmp/installer-system-init-options.
Date: Sat, 22 Feb 2020 00:20:29 +0100
* gnu/installer/final.scm (install-system): Honor
"/tmp/installer-system-init-options".
---
 gnu/installer/final.scm | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/gnu/installer/final.scm b/gnu/installer/final.scm
index 7193ecb8a4..869be8814b 100644
--- a/gnu/installer/final.scm
+++ b/gnu/installer/final.scm
@@ -111,9 +111,19 @@ cow-store service."
 Start COW-STORE service on target directory and launch guix install command in
 a subshell.  LOCALE must be the locale name under which that command will run,
 or #f.  Return #t on success and #f on failure."
-  (let ((install-command (list "guix" "system" "init" "--fallback"
-                               (%installer-configuration-file)
-                               (%installer-target-dir))))
+  (let* ((options         (catch 'system-error
+                            (lambda ()
+                              ;; If this file exists, it can provide
+                              ;; additional command-line options.
+                              (call-with-input-file
+                                  "/tmp/installer-system-init-options"
+                                read))
+                            (const '())))
+         (install-command (append (list "guix" "system" "init"
+                                        "--fallback")
+                                  options
+                                  (list (%installer-configuration-file)
+                                        (%installer-target-dir)))))
     (mkdir-p (%installer-target-dir))
 
     ;; We want to initialize user passwords but we don't want to store them in
-- 
2.25.1





Information forwarded to guix-patches <at> gnu.org:
bug#39729; Package guix-patches. (Fri, 21 Feb 2020 23:21:04 GMT) Full text and rfc822 format available.

Message #26 received at 39729 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: 39729 <at> debbugs.gnu.org
Cc: Ludovic Courtès <ludo <at> gnu.org>
Subject: [PATCH 7/7] tests: install: Add "gui-installed-os".
Date: Sat, 22 Feb 2020 00:20:30 +0100
* gnu/installer/tests.scm: New file.
* gnu/local.mk (INSTALLER_MODULES): Add it.
* gnu/tests/install.scm (run-install): Add #:gui-test.  Add (gnu
installer tests) to the marionette imported modules.  Honor GUI-TEST.
Check whether SCRIPT is true.
(%root-password, %syslog-conf): New variable.
(operating-system-with-console-syslog, gui-test-program)
(guided-installation-test): New procedures.
(%extra-packages, installation-os-for-gui-tests)
(%test-gui-installed-os): New variable.
---
 gnu/installer/tests.scm | 340 ++++++++++++++++++++++++++++++++++++++++
 gnu/local.mk            |   3 +-
 gnu/tests/install.scm   | 200 ++++++++++++++++++++++-
 3 files changed, 535 insertions(+), 8 deletions(-)
 create mode 100644 gnu/installer/tests.scm

diff --git a/gnu/installer/tests.scm b/gnu/installer/tests.scm
new file mode 100644
index 0000000000..6f5393e3ab
--- /dev/null
+++ b/gnu/installer/tests.scm
@@ -0,0 +1,340 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2020 Ludovic Courtès <ludo <at> gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu installer tests)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-34)
+  #:use-module (srfi srfi-35)
+  #:use-module (ice-9 match)
+  #:use-module (ice-9 regex)
+  #:use-module (ice-9 pretty-print)
+  #:export (&pattern-not-matched
+            pattern-not-matched?
+
+            %installer-socket-file
+            open-installer-socket
+
+            converse
+            conversation-log-port
+
+            choose-locale+keyboard
+            enter-host-name+passwords
+            choose-services
+            choose-partitioning
+            conclude-installation
+
+            edit-configuration-file))
+
+;;; Commentary:
+;;;
+;;; This module provides tools to test the guided "graphical" installer in a
+;;; non-interactive fashion.  The core of it is 'converse': it allows you to
+;;; state Expect-style dialogues, which happen over the Unix-domain socket the
+;;; installer listens to.  Higher-level procedures such as
+;;; 'choose-locale+keyboard' are provided to perform specific parts of the
+;;; dialogue.
+;;;
+;;; Code:
+
+(define %installer-socket-file
+  ;; Socket the installer listens to.
+  "/var/guix/installer-socket")
+
+(define* (open-installer-socket #:optional (file %installer-socket-file))
+  "Return a socket connected to the installer."
+  (let ((sock (socket AF_UNIX SOCK_STREAM 0)))
+    (connect sock AF_UNIX file)
+    sock))
+
+(define-condition-type &pattern-not-matched &error
+  pattern-not-matched?
+  (pattern pattern-not-matched-pattern)
+  (sexp    pattern-not-matched-sexp))
+
+(define (pattern-error pattern sexp)
+  (raise (condition
+          (&pattern-not-matched
+           (pattern pattern) (sexp sexp)))))
+
+(define conversation-log-port
+  ;; Port where debugging info is logged
+  (make-parameter (current-error-port)))
+
+(define (converse-debug pattern)
+  (format (conversation-log-port)
+          "conversation expecting pattern ~s~%"
+          pattern))
+
+(define-syntax converse
+  (lambda (s)
+    "Convert over PORT: read sexps from there, match them against each
+PATTERN, and send the corresponding REPLY.  Raise to '&pattern-not-matched'
+when one of the PATTERNs is not matched."
+
+    ;; XXX: Strings that appear in PATTERNs must be in the language the
+    ;; installer is running in.  In the future, we should add support to allow
+    ;; writing English strings in PATTERNs and have the pattern matcher
+    ;; automatically translate them.
+
+    ;; Here we emulate 'pmatch' syntax on top of 'match'.  This is ridiculous
+    ;; but that's because 'pmatch' compares objects with 'eq?', making it
+    ;; pretty useless, and it doesn't support ellipses and such.
+
+    (define (quote-pattern s)
+      ;; Rewrite the pattern S from pmatch style (a ,b) to match style like
+      ;; ('a b).
+      (with-ellipsis :::
+        (syntax-case s (unquote _ ...)
+          ((unquote id) #'id)
+          (_ #'_)
+          (... #'...)
+          (id
+           (identifier? #'id)
+           #''id)
+          ((lst :::) (map quote-pattern #'(lst :::)))
+          (pattern #'pattern))))
+
+    (define (match-pattern s)
+      ;; Match one pattern without a guard.
+      (syntax-case s ()
+        ((port (pattern reply) continuation)
+         (with-syntax ((pattern (quote-pattern #'pattern)))
+           #'(let ((pat 'pattern))
+               (converse-debug pat)
+               (match (read port)
+                 (pattern
+                  (let ((data (call-with-values (lambda () reply)
+                                list)))
+                    (for-each (lambda (obj)
+                                (write obj port)
+                                (newline port))
+                              data)
+                    (force-output port)
+                    (continuation port)))
+                 (sexp
+                  (pattern-error pat sexp))))))))
+
+    (syntax-case s ()
+      ((_ port (pattern reply) rest ...)
+       (match-pattern #'(port (pattern reply)
+                              (lambda (port)
+                                (converse port rest ...)))))
+      ((_ port (pattern guard reply) rest ...)
+       #`(let ((skip? (not guard))
+               (next  (lambda (p)
+                        (converse p rest ...))))
+           (if skip?
+               (next port)
+               #,(match-pattern #'(port (pattern reply) next)))))
+      ((_ port)
+       #t))))
+
+(define* (choose-locale+keyboard port
+                                 #:key
+                                 (language "English")
+                                 (location "Hong Kong")
+                                 (timezone '("Europe" "Zagreb"))
+                                 (keyboard
+                                  '("English (US)"
+                                    "English (intl., with AltGr dead keys)")))
+  "Converse over PORT with the guided installer to choose the specified
+LANGUAGE, LOCATION, TIMEZONE, and KEYBOARD."
+  (converse port
+    ((list-selection (title "Locale language")
+                     (multiple-choices? #f)
+                     (items _))
+     language)
+    ((list-selection (title "Locale location")
+                     (multiple-choices? #f)
+                     (items _))
+     location)
+    ((menu (title "GNU Guix install")
+           (text _)
+           (items (,guided _ ...)))           ;"Guided graphical installation"
+     guided)
+    ((list-selection (title "Timezone")
+                     (multiple-choices? #f)
+                     (items _))
+     (first timezone))
+    ((list-selection (title "Timezone")
+                     (multiple-choices? #f)
+                     (items _))
+     (second timezone))
+    ((list-selection (title "Layout")
+                     (multiple-choices? #f)
+                     (items _))
+     (first keyboard))
+    ((list-selection (title "Variant")
+                     (multiple-choices? #f)
+                     (items _))
+     (second keyboard))))
+
+(define* (enter-host-name+passwords port
+                                    #:key
+                                    (host-name "guix")
+                                    (root-password "foo")
+                                    (users '(("alice" "pass1")
+                                             ("bob" "pass2")
+                                             ("charlie" "pass3"))))
+  "Converse over PORT with the guided installer to choose HOST-NAME,
+ROOT-PASSWORD, and USERS."
+  (converse port
+    ((input (title "Hostname") (text _) (default _))
+     host-name)
+    ((input (title "System administrator password") (text _) (default _))
+     root-password)
+    ((input (title "Password confirmation required") (text _) (default _))
+     root-password)
+    ((add-users)
+     (match users
+       (((names passwords) ...)
+        (map (lambda (name password)
+               `(user (name ,name) (real-name ,(string-titlecase name))
+                      (home-directory ,(string-append "/home/" name))
+                      (password ,password)))
+             names passwords))))))
+
+(define* (choose-services port
+                          #:key
+                          (desktop-environments '("GNOME"))
+                          (choose-network-service?
+                           (lambda (service)
+                             (or (string-contains service "SSH")
+                                 (string-contains service "NSS"))))
+                          (choose-network-management-tool?
+                           (lambda (service)
+                             (string-contains service "DHCP"))))
+  "Converse over PORT to choose networking services."
+  (converse port
+    ((checkbox-list (title "Desktop environment") (text _)
+                    (items _))
+     desktop-environments)
+    ((checkbox-list (title "Network service") (text _)
+                    (items ,services))
+     (filter choose-network-service? services))
+
+    ;; The "Network management" dialog shows up only when no desktop
+    ;; environments have been selected, hence the guard.
+    ((list-selection (title "Network management")
+                     (multiple-choices? #f)
+                     (items ,services))
+     (null? desktop-environments)
+     (find choose-network-management-tool? services))))
+
+(define (edit-configuration-file file)
+  "Edit FILE, an operating system configuration file generated by the
+installer, by adding a marionette service such that the installed OS is
+instrumented for further testing."
+  (define (read-expressions port)
+    (let loop ((result '()))
+      (match (read port)
+        ((? eof-object?)
+         (reverse result))
+        (exp
+         (loop (cons exp result))))))
+
+  (define (edit exp)
+    (match exp
+      (('operating-system _ ...)
+       `(marionette-operating-system ,exp
+                                     #:imported-modules
+                                     '((gnu services herd)
+                                       (guix build utils)
+                                       (guix combinators))))
+      (_
+       exp)))
+
+  (let ((content (call-with-input-file file read-expressions)))
+    (call-with-output-file file
+      (lambda (port)
+        (format port "\
+;; Operating system configuration edited for automated testing.~%~%")
+
+        (pretty-print '(use-modules (gnu tests)) port)
+        (for-each (lambda (exp)
+                    (pretty-print (edit exp) port)
+                    (newline port))
+                  content)))
+
+    #t))
+
+(define* (choose-partitioning port
+                              #:key
+                              (encrypted? #t)
+                              (passphrase "thepassphrase")
+                              (edit-configuration-file
+                               edit-configuration-file))
+  "Converse over PORT to choose the partitioning method.  When ENCRYPTED? is
+true, choose full-disk encryption with PASSPHRASE as the LUKS passphrase.
+This conversation goes past the final dialog box that shows the configuration
+file, actually starting the installation process."
+  (converse port
+    ((list-selection (title "Partitioning method")
+                     (multiple-choices? #f)
+                     (items (,not-encrypted ,encrypted _ ...)))
+     (if encrypted?
+         encrypted
+         not-encrypted))
+    ((list-selection (title "Disk") (multiple-choices? #f)
+                     (items (,disk _ ...)))
+     disk)
+
+    ;; The "Partition table" dialog pops up only if there's not already a
+    ;; partition table.
+    ((list-selection (title "Partition table")
+                     (multiple-choices? #f)
+                     (items _))
+     "gpt")
+    ((list-selection (title "Partition scheme")
+                     (multiple-choices? #f)
+                     (items (,one-partition _ ...)))
+     one-partition)
+    ((list-selection (title "Guided partitioning")
+                     (multiple-choices? #f)
+                     (items (,disk _ ...)))
+     disk)
+    ((input (title "Password required")
+            (text _) (default #f))
+     encrypted?                                   ;only when ENCRYPTED?
+     passphrase)
+    ((input (title "Password confirmation required")
+            (text _) (default #f))
+     encrypted?
+     passphrase)
+    ((confirmation (title "Format disk?") (text _))
+     #t)
+    ((info (title "Preparing partitions") _ ...)
+     (values))                                    ;nothing to return
+    ((file-dialog (title "Configuration file")
+                  (text _)
+                  (file ,configuration-file))
+     (edit-configuration-file configuration-file))))
+
+(define (conclude-installation port)
+  "Conclude the installation by checking over PORT that we get the final
+messages once the 'guix system init' process has completed."
+  (converse port
+    ((pause)                                      ;"Press Enter to continue."
+     #t)
+    ((installation-complete)                      ;congratulations!
+     (values))))
+
+;;; Local Variables:
+;;; eval: (put 'converse 'scheme-indent-function 1)
+;;; eval: (put 'with-ellipsis 'scheme-indent-function 1)
+;;; End:
diff --git a/gnu/local.mk b/gnu/local.mk
index f2289518e5..702dc59b80 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1,5 +1,5 @@
 # GNU Guix --- Functional package management for GNU
-# Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo <at> gnu.org>
+# Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo <at> gnu.org>
 # Copyright © 2013, 2014, 2015, 2016, 2017, 2018, 2019 Andreas Enge <andreas <at> enge.fr>
 # Copyright © 2016 Mathieu Lirzin <mthl <at> gnu.org>
 # Copyright © 2013, 2014, 2015, 2016, 2017, 2018, 2019 Mark H Weaver <mhw <at> netris.org>
@@ -655,6 +655,7 @@ INSTALLER_MODULES =                             \
   %D%/installer/record.scm		        \
   %D%/installer/services.scm			\
   %D%/installer/steps.scm			\
+  %D%/installer/tests.scm			\
   %D%/installer/timezone.scm			\
   %D%/installer/user.scm			\
   %D%/installer/utils.scm			\
diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm
index 335efbd468..8480c95fd6 100644
--- a/gnu/tests/install.scm
+++ b/gnu/tests/install.scm
@@ -26,10 +26,14 @@
   #:use-module (gnu system install)
   #:use-module (gnu system vm)
   #:use-module ((gnu build vm) #:select (qemu-command))
+  #:use-module (gnu packages admin)
   #:use-module (gnu packages bootloaders)
+  #:use-module (gnu packages cryptsetup)
+  #:use-module (gnu packages linux)
   #:use-module (gnu packages ocr)
   #:use-module (gnu packages package-management)
   #:use-module (gnu packages virtualization)
+  #:use-module (gnu services networking)
   #:use-module (guix store)
   #:use-module (guix monads)
   #:use-module (guix packages)
@@ -44,7 +48,9 @@
             %test-raid-root-os
             %test-encrypted-root-os
             %test-btrfs-root-os
-            %test-jfs-root-os))
+            %test-jfs-root-os
+
+            %test-gui-installed-os))
 
 ;;; Commentary:
 ;;;
@@ -179,6 +185,7 @@ reboot\n")
 (define* (run-install target-os target-os-source
                       #:key
                       (script %simple-installation-script)
+                      (gui-test #f)
                       (packages '())
                       (os (marionette-operating-system
                            (operating-system
@@ -191,6 +198,7 @@ reboot\n")
                                        packages))
                              (kernel-arguments '("console=ttyS0")))
                            #:imported-modules '((gnu services herd)
+                                                (gnu installer tests)
                                                 (guix combinators))))
                       (installation-disk-image-file-system-type "ext4")
                       (target-size (* 2200 MiB)))
@@ -256,13 +264,21 @@ packages defined in installation-os."
                                 (start 'term-tty1))
                              marionette)
 
-            (marionette-eval '(call-with-output-file "/etc/target-config.scm"
-                                (lambda (port)
-                                  (write '#$target-os-source port)))
-                             marionette)
+            (when #$(->bool script)
+              (marionette-eval '(call-with-output-file "/etc/target-config.scm"
+                                  (lambda (port)
+                                    (write '#$target-os-source port)))
+                               marionette)
+              (exit (marionette-eval '(zero? (system #$script))
+                                     marionette)))
 
-            (exit (marionette-eval '(zero? (system #$script))
-                                   marionette)))))
+            (when #$(->bool gui-test)
+              (wait-for-unix-socket "/var/guix/installer-socket"
+                                    marionette)
+              (format #t "installer socket ready~%")
+              (force-output)
+              (exit #$(and gui-test
+                           (gui-test #~marionette)))))))
 
     (gexp->derivation "installation" install)))
 
@@ -890,4 +906,174 @@ build (current-guix) and then store a couple of full system images.")
                          (command (qemu-command/writable-image image)))
       (run-basic-test %jfs-root-os command "jfs-root-os")))))
 
+
+;;;
+;;; Installation through the graphical interface.
+;;;
+
+(define %syslog-conf
+  ;; Syslog configuration that dumps to /dev/console, so we can see the
+  ;; installer's messages during the test.
+  (computed-file "syslog.conf"
+                 #~(begin
+                     (copy-file #$%default-syslog.conf #$output)
+                     (chmod #$output #o644)
+                     (let ((port (open-file #$output "a")))
+                       (display "\n*.info /dev/console\n" port)
+                       #t))))
+
+(define (operating-system-with-console-syslog os)
+  "Return OS with a syslog service that writes to /dev/console."
+  (operating-system
+    (inherit os)
+    (services (modify-services (operating-system-user-services os)
+                (syslog-service-type config
+                                     =>
+                                     (syslog-configuration
+                                      (inherit config)
+                                      (config-file %syslog-conf)))))))
+
+(define %root-password "foo")
+
+(define* (gui-test-program marionette #:key (encrypted? #f))
+  #~(let ()
+      (define (screenshot file)
+        (marionette-control (string-append "screendump " file)
+                            #$marionette))
+
+      (setvbuf (current-output-port) 'none)
+      (setvbuf (current-error-port) 'none)
+
+      (marionette-eval '(use-modules (gnu installer tests))
+                       #$marionette)
+
+      ;; Arrange so that 'converse' prints debugging output to the console.
+      (marionette-eval '(let ((console (open-output-file "/dev/console")))
+                          (setvbuf console 'none)
+                          (conversation-log-port console))
+                       #$marionette)
+
+      ;; Tell the installer to not wait for the Connman "online" status.
+      (marionette-eval '(call-with-output-file "/tmp/installer-assume-online"
+                          (const #t))
+                       #$marionette)
+
+      ;; Run 'guix system init' with '--no-grafts', to cope with the lack of
+      ;; network access.
+      (marionette-eval '(call-with-output-file
+                            "/tmp/installer-system-init-options"
+                          (lambda (port)
+                            (write '("--no-grafts" "--no-substitutes")
+                                   port)))
+                       #$marionette)
+
+      (marionette-eval '(define installer-socket
+                          (open-installer-socket))
+                       #$marionette)
+      (screenshot "installer-start.ppm")
+
+      (marionette-eval '(choose-locale+keyboard installer-socket)
+                       #$marionette)
+      (screenshot "installer-locale.ppm")
+
+      ;; Choose the host name that the "basic" test expects.
+      (marionette-eval '(enter-host-name+passwords installer-socket
+                                                   #:host-name "liberigilo"
+                                                   #:root-password
+                                                   #$%root-password
+                                                   #:users
+                                                   '(("alice" "pass1")
+                                                     ("bob" "pass2")))
+                       #$marionette)
+      (screenshot "installer-services.ppm")
+
+      (marionette-eval '(choose-services installer-socket
+                                         #:desktop-environments '()
+                                         #:choose-network-service?
+                                         (const #f))
+                       #$marionette)
+      (screenshot "installer-partitioning.ppm")
+
+      (marionette-eval '(choose-partitioning installer-socket
+                                             #:encrypted? #$encrypted?
+                                             #:passphrase #$%luks-passphrase)
+                       #$marionette)
+      (screenshot "installer-run.ppm")
+
+      (marionette-eval '(conclude-installation installer-socket)
+                       #$marionette)
+
+      (sync)
+      #t))
+
+(define %extra-packages
+  ;; Packages needed when installing with an encrypted root.
+  (list isc-dhcp
+        lvm2-static cryptsetup-static e2fsck/static
+        loadkeys-static))
+
+(define installation-os-for-gui-tests
+  ;; Operating system that contains all of %EXTRA-PACKAGES, needed for the
+  ;; target OS, as well as syslog output redirected to the console so we can
+  ;; see what the installer is up to.
+  (marionette-operating-system
+   (operating-system
+     (inherit (operating-system-with-console-syslog
+               (operating-system-add-packages
+                (operating-system-with-current-guix
+                 installation-os)
+                %extra-packages)))
+     (kernel-arguments '("console=ttyS0")))
+   #:imported-modules '((gnu services herd)
+                        (gnu installer tests)
+                        (guix combinators))))
+
+(define* (guided-installation-test name #:key encrypted?)
+  (define os
+    (operating-system
+      (inherit %minimal-os)
+      (users (append (list (user-account
+                            (name "alice")
+                            (comment "Bob's sister")
+                            (group "users")
+                            (supplementary-groups
+                             '("wheel" "audio" "video")))
+                           (user-account
+                            (name "bob")
+                            (comment "Alice's brother")
+                            (group "users")
+                            (supplementary-groups
+                             '("wheel" "audio" "video"))))
+                     %base-user-accounts))
+      (swap-devices '("/dev/vdb2"))
+      (services (cons (service dhcp-client-service-type)
+                      (operating-system-user-services %minimal-os)))))
+
+  (system-test
+   (name name)
+   (description
+    "Install an OS using the graphical installer and test it.")
+   (value
+    (mlet* %store-monad ((image   (run-install os '(this is unused)
+                                               #:script #f
+                                               #:os installation-os-for-gui-tests
+                                               #:gui-test
+                                               (lambda (marionette)
+                                                 (gui-test-program
+                                                  marionette
+                                                  #:encrypted? encrypted?))))
+                         (command (qemu-command/writable-image image)))
+      (run-basic-test os command name
+                      #:initialization (and encrypted? enter-luks-passphrase)
+                      #:root-password %root-password)))))
+
+(define %test-gui-installed-os
+  (guided-installation-test "gui-installed-os"
+                            #:encrypted? #f))
+
+;; (define %test-gui-installed-os
+;;   ;; FIXME: Fails due to <https://bugs.gnu.org/39712>.
+;;   (guided-installation-test "gui-installed-os-encrypted"
+;;                             #:encrypted? #t))
+
 ;;; install.scm ends here
-- 
2.25.1





Information forwarded to guix-patches <at> gnu.org:
bug#39729; Package guix-patches. (Thu, 27 Feb 2020 16:11:01 GMT) Full text and rfc822 format available.

Message #29 received at 39729 <at> debbugs.gnu.org (full text, mbox):

From: Mathieu Othacehe <m.othacehe <at> gmail.com>
To: 39729 <at> debbugs.gnu.org,
Cc: Ludovic Courtès <ludo <at> gnu.org>
Subject: Re: [bug#39729] [PATCH 0/7] Testing the graphical installer
Date: Thu, 27 Feb 2020 17:10:42 +0100
Hey!

> The second part implements the actual test.  The new (gnu installer
> tests) module provides tools to implement a dialogue with the installer,
> and the new “gui-installed-os” test uses it to perform a bare-bones
> style installation.  There’s a commented out variant that does it on
> an encrypted root, but it currently fails presumably due to
> <https://issues.guix.gnu.org/issue/39712>.
>
> That’s it!
>
> Feedback welcome!

This serie LGTM, this is really impressive :) About the umounting issue,
you were right. Umounting failed for both %test-gui-installed-os and
%test-gui-installed-os-encrypted.

The issue was that guix-daemon was keeping open files inside the
cow-store, preventing the umount. I discovered then a second issue, some
udevd workers, started while the cow-store was active were also
preventing the umounting.

I published a few patches on top of yours on wip-installer-test to fix
those issues.

Thanks,

Mathieu

PS: I had a hard time debugging the marionette, couldn't find better to
add some syslog, wait an hour to test & repeat. Do you have a better
approach? Would it be possible to have a debug ssh in the marionette?




Information forwarded to guix-patches <at> gnu.org:
bug#39729; Package guix-patches. (Thu, 05 Mar 2020 22:47:02 GMT) Full text and rfc822 format available.

Message #32 received at 39729 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Mathieu Othacehe <m.othacehe <at> gmail.com>
Cc: 39729 <at> debbugs.gnu.org
Subject: Re: [bug#39729] [PATCH 0/7] Testing the graphical installer
Date: Thu, 05 Mar 2020 23:46:27 +0100
Hi Mathieu!

Mathieu Othacehe <m.othacehe <at> gmail.com> skribis:

>> The second part implements the actual test.  The new (gnu installer
>> tests) module provides tools to implement a dialogue with the installer,
>> and the new “gui-installed-os” test uses it to perform a bare-bones
>> style installation.  There’s a commented out variant that does it on
>> an encrypted root, but it currently fails presumably due to
>> <https://issues.guix.gnu.org/issue/39712>.
>>
>> That’s it!
>>
>> Feedback welcome!
>
> This serie LGTM, this is really impressive :) About the umounting issue,
> you were right. Umounting failed for both %test-gui-installed-os and
> %test-gui-installed-os-encrypted.
>
> The issue was that guix-daemon was keeping open files inside the
> cow-store, preventing the umount. I discovered then a second issue, some
> udevd workers, started while the cow-store was active were also
> preventing the umounting.
>
> I published a few patches on top of yours on wip-installer-test to fix
> those issues.

Well done, woohoo!

I’ve pushed the whole series on ‘master’, including your bug fixes.

We can think about writing installer tests for other configurations
now.  That should be the easy part.  :-)

> PS: I had a hard time debugging the marionette, couldn't find better to
> add some syslog, wait an hour to test & repeat. Do you have a better
> approach? Would it be possible to have a debug ssh in the marionette?

I don’t really have a better approach.  If you want to see the output of
‘guix system init’, you can redirect its stderr to /dev/console (wrap
the ‘invoke’ call in ‘with-error-to-file’), and then you get a better
idea of what’s going on.  But that’s about it.

SSH wouldn’t be very helpful because the test process is non-interactive.

Thanks!

Ludo’.




Added tag(s) fixed. Request was from Ludovic Courtès <ludo <at> gnu.org> to control <at> debbugs.gnu.org. (Thu, 05 Mar 2020 22:47:02 GMT) Full text and rfc822 format available.

bug closed, send any further explanations to 39729 <at> debbugs.gnu.org and Ludovic Courtès <ludo <at> gnu.org> Request was from Ludovic Courtès <ludo <at> gnu.org> to control <at> debbugs.gnu.org. (Thu, 05 Mar 2020 22:47:02 GMT) Full text and rfc822 format available.

bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Fri, 03 Apr 2020 11:24:05 GMT) Full text and rfc822 format available.

This bug report was last modified 4 years and 14 days ago.

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