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# GNU Guix --- Functional package management for GNU
# Copyright © 2018, 2019 Ludovic Courtès <ludo@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/>.

#
# Test the 'guix pack --localstatedir' command-line utility.
#

guix pack --version

# 'guix pack --localstatedir' produces derivations that depend on
# guile-sqlite3 and guile-gcrypt.  To make that relatively inexpensive, run
# the test in the user's global store if possible, on the grounds that
# binaries may already be there or can be built or downloaded inexpensively.

storedir="`guile -c '(use-modules (guix config))(display %storedir)'`"
localstatedir="`guile -c '(use-modules (guix config))(display %localstatedir)'`"
NIX_STORE_DIR="$storedir"
GUIX_DAEMON_SOCKET="$localstatedir/guix/daemon-socket/socket"
export NIX_STORE_DIR GUIX_DAEMON_SOCKET

if ! guile -c '(use-modules (guix)) (exit (false-if-exception (open-connection)))'
then
    exit 77
fi

# Build a tarball with '--localstatedir'
the_pack="`guix pack -C none --localstatedir --profile-name=current-guix \
            guile-bootstrap`"
test_directory="`mktemp -d`"
trap 'chmod -Rf +w "$test_directory"; rm -rf "$test_directory"' EXIT

cd "$test_directory"
tar -xf "$the_pack"

profile="`find -name current-guix`"
test "`readlink $profile`" = "current-guix-1-link"
test -s "`dirname $profile`/../../../db/db.sqlite"
test -x ".`guix build guile-bootstrap`/bin/guile"
cd -

# Make sure the store database is not completely bogus.
guile -c "(use-modules (sqlite3) (guix config) (ice-9 match))

  (define db
    (sqlite-open (string-append \"$test_directory\"
                                %localstatedir
                               \"/guix/db/db.sqlite\")
                 SQLITE_OPEN_READONLY))

  (define stmt
    (sqlite-prepare db \"SELECT * FROM ValidPaths;\"))

  (match (sqlite-fold cons '() stmt)
    ((#(ids paths hashes times derivers sizes) ...)
     (exit (member \"`guix build guile-bootstrap`\" paths))))"
'>78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 David Craven <david@craven.ch>
;;;
;;; 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 services sddm)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages display-managers)
  #:use-module (gnu packages freedesktop)
  #:use-module (gnu packages xorg)
  #:use-module (gnu services)
  #:use-module (gnu services shepherd)
  #:use-module (gnu services xorg)
  #:use-module (gnu system pam)
  #:use-module (gnu system shadow)
  #:use-module (guix gexp)
  #:use-module (guix records)
  #:export (sddm-configuration
            sddm-configuration?
            sddm-service-type
            sddm-service))

(define-record-type* <sddm-configuration>
  sddm-configuration      make-sddm-configuration
  sddm-configuration?
  (sddm                   sddm-configuration-sddm
                          (default sddm))

  ;; [General]
  ;; valid values are x11 and wayland
  ;; currently doesn't do anything is enabled by wayland greeter PR
  (display-server         sddm-configuration-display-server
                          (default "x11"))
  ;; valid values are on, off or none
  (numlock                sddm-configuration-numlock
                          (default "on"))
  (halt-command           sddm-configuration-halt-command
                          (default (file-append shepherd "/sbin/halt")))
  (reboot-command         sddm-configuration-reboot-command
                          (default (file-append shepherd "/sbin/reboot")))

  ;; [Theme]
  ;; valid values are elarun or maldives
  (theme                  sddm-configuration-theme
                          (default "maldives"))
  (themes-directory       sddm-configuration-themes-directory
                          (default "/run/current-system/profile/share/sddm/themes"))
  (faces-directory        sddm-configuration-faces-directory
                          (default "/run/current-system/profile/share/sddm/faces"))

  ;; [Users]
  (default-path           sddm-configuration-default-path
                          (default "/run/current-system/profile/bin"))
  (minimum-uid            sddm-configuration-minimum-uid
                          (default 1000))
  (maximum-uid            sddm-configuration-maximum-uid
                          (default 2000))
  (remember-last-user?    sddm-configuration-remember-last-user?
                          (default #t))
  (remember-last-session? sddm-configuration-remember-last-session?
                          (default #t))
  (hide-users             sddm-configuration-hide-users
                          (default ""))
  (hide-shells            sddm-configuration-hide-shells
                          (default (file-append shadow "/sbin/nologin")))

  ;; [Wayland]
  (session-command        sddm-configuration-session-command
                          (default (file-append sddm "/share/sddm/scripts/wayland-session")))
  (sessions-directory     sddm-configuration-sessions-directory
                          (default "/run/current-system/profile/share/wayland-sessions"))
  ;; [X11]
  (xorg-server-path       sddm-configuration-xorg-server-path
                          (default (xorg-start-command)))
  (xauth-path             sddm-configuration-xauth-path
                          (default (file-append xauth "/bin/xauth")))
  (xephyr-path            sddm-configuration-xephyr-path
                          (default (file-append xorg-server "/bin/Xephyr")))
  (xdisplay-start         sddm-configuration-xdisplay-start
                          (default (file-append sddm "/share/sddm/scripts/Xsetup")))
  (xdisplay-stop          sddm-configuration-xdisplay-stop
                          (default (file-append sddm "/share/sddm/scripts/Xstop")))
  (xsession-command       sddm-configuration-xsession-command
                          (default (xinitrc)))
  (xsessions-directory    sddm-configuration-xsessions-directory
                          (default "/run/current-system/profile/share/xsessions"))
  (minimum-vt             sddm-configuration-minimum-vt
                          (default 7))
  (xserver-arguments      sddm-configuration-xserver-arguments
                          (default "-nolisten tcp"))

  ;; [Autologin]
  (auto-login-user        sddm-configuration-auto-login-user
                          (default ""))
  ;; valid values are xfce.desktop gnome.desktop weston.desktop hawaii.desktop
  (auto-login-session     sddm-configuration-auto-login-session
                          (default ""))
  (relogin?               sddm-configuration-relogin?
                          (default #f)))

(define (sddm-configuration-file config)
  (mixed-text-file "sddm.conf" "
[General]
DisplayServer="        (sddm-configuration-display-server config)              "
Numlock="              (sddm-configuration-numlock config)                     "
HaltCommand="          (sddm-configuration-halt-command config)                "
RebootCommand="        (sddm-configuration-reboot-command config)              "

[Users]
DefaultPath="          (sddm-configuration-default-path config)                "
MinimumUid="           (number->string (sddm-configuration-minimum-uid config))"
MaximumUid="           (number->string (sddm-configuration-maximum-uid config))"
RememberLastUser="     (if (sddm-configuration-remember-last-user? config)
                           "true" "false")                                     "
RememberLastSession="  (if (sddm-configuration-remember-last-session? config)
                           "true" "false")                                     "
HideUsers="            (sddm-configuration-hide-users config)                  "
Hideshells="           (sddm-configuration-hide-shells config)                 "

[Theme]
Current="              (sddm-configuration-theme config)                       "
ThemeDir="             (sddm-configuration-themes-directory config)            "
FacesDir="             (sddm-configuration-faces-directory config)             "

[Wayland]
SessionCommand="       (sddm-configuration-session-command config)             "
SessionDir="           (sddm-configuration-sessions-directory config)          "

[X11]
ServerPath="           (sddm-configuration-xorg-server-path config)            "
XauthPath="            (sddm-configuration-xauth-path config)                  "
XephyrPath="           (sddm-configuration-xephyr-path config)                 "
DisplayCommand="       (sddm-configuration-xdisplay-start config)              "
DisplayStopCommand="   (sddm-configuration-xdisplay-stop config)               "
SessionCommand="       (sddm-configuration-xsession-command config)            "
SessionDir="           (sddm-configuration-xsessions-directory config)         "
MinimumVT="            (number->string (sddm-configuration-minimum-vt config)) "
ServerArguments="      (sddm-configuration-xserver-arguments config)           "

[Autologin]
User="                 (sddm-configuration-auto-login-user config)             "
Session="              (sddm-configuration-auto-login-session config)          "
Relogin="              (if (sddm-configuration-relogin? config)
                           "true" "false")                                     "
"))

(define (sddm-shepherd-service config)
  "Return a <shepherd-service> for sddm with CONFIG."

  (define sddm-command
    #~(list (string-append #$(sddm-configuration-sddm config) "/bin/sddm")))

  (list (shepherd-service
         (documentation "SDDM display manager.")
         (requirement '(user-processes))
         (provision '(display-manager))
         (start #~(make-forkexec-constructor #$sddm-command))
         (stop #~(make-kill-destructor)))))

(define (sddm-etc-service config)
  (list `("sddm.conf" ,(sddm-configuration-file config))))

(define (sddm-pam-service)
  "Return a PAM service for @command{sddm}."
  (pam-service
   (name "sddm")
   (auth
    (list
     (pam-entry
      (control "requisite")
      (module "pam_nologin.so"))
     (pam-entry
      (control "required")
      (module "pam_env.so"))
     (pam-entry
      (control "required")
      (module "pam_succeed_if.so")
      (arguments (list "uid >= 1000" "quiet")))
     ;; should be factored out into system-auth
     (pam-entry
      (control "required")
      (module "pam_unix.so"))))
   (account
    (list
     ;; should be factored out into system-account
     (pam-entry
      (control "required")
      (module "pam_unix.so"))))
   (password
    (list
     ;; should be factored out into system-password
     (pam-entry
      (control "required")
      (module "pam_unix.so")
      (arguments (list "sha512" "shadow" "try_first_pass")))))
   (session
    (list
     ;; lfs has a required pam_limits.so
     ;; should be factored out into system-session
     (pam-entry
      (control "required")
      (module "pam_unix.so"))))))

(define (sddm-greeter-pam-service)
  "Return a PAM service for @command{sddm-greeter}."
  (pam-service
   (name "sddm-greeter")
   (auth
    (list
     ;; Load environment from /etc/environment and ~/.pam_environment
     (pam-entry
      (control "required")
      (module "pam_env.so"))
     ;; Always let the greeter start without authentication
     (pam-entry
      (control "required")
      (module "pam_permit.so"))))
   (account
    (list
     ;; No action required for account management
     (pam-entry
      (control "required")
      (module "pam_permit.so"))))
   (password
    (list
     ;; Can't change password
     (pam-entry
      (control "required")
      (module "pam_deny.so"))))
   (session
    (list
     ;; Setup session
     (pam-entry
      (control "required")
      (module "pam_unix.so"))))))

(define (sddm-autologin-pam-service)
  "Return a PAM service for @command{sddm-autologin}"
  (pam-service
   (name "sddm-autologin")
   (auth
    (list
     (pam-entry
      (control "requisite")
      (module "pam_nologin.so"))
     (pam-entry
      (control "required")
      (module "pam_succeed_if.so")
      (arguments (list "uid >= 1000" "quiet")))
     (pam-entry
      (control "required")
      (module "pam_permit.so"))))
   (account
    (list
     (pam-entry
      (control "include")
      (module "sddm"))))
   (password
    (list
     (pam-entry
      (control "required")
      (module "pam_deny.so"))))
   (session
    (list
     (pam-entry
      (control "include")
      (module "sddm"))))))

(define (sddm-pam-services config)
  (list (sddm-pam-service)
        (sddm-greeter-pam-service)
        (sddm-autologin-pam-service)))

(define %sddm-accounts
  (list (user-group (name "sddm") (system? #t))
        (user-account
         (name "sddm")
         (group "sddm")
         (system? #t)
         (comment "SDDM user")
         (home-directory "/var/lib/sddm")
         (shell (file-append shadow "/sbin/nologin")))))

;; Add default themes to profile
(define sddm-profile-service
  (compose list sddm-configuration-sddm))

(define sddm-service-type
  (service-type (name 'sddm)
                (extensions
                  (list (service-extension shepherd-root-service-type
                                           sddm-shepherd-service)
                        (service-extension etc-service-type
                                           sddm-etc-service)
                        (service-extension pam-root-service-type
                                           sddm-pam-services)
                        (service-extension account-service-type
                                           (const %sddm-accounts))
                        (service-extension profile-service-type
                                           sddm-profile-service)))))

(define* (sddm-service #:optional (config (sddm-configuration)))
  "Run the @uref{https://github.com/sddm/sddm,SSDM display manager}
with the given @var{config}, a @code{<sddm-configuration>} object."
  (service sddm-service-type config))