gnu: services: Add xandikos-service-type.

* gnu/services/dav.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add file.
* doc/guix.texi (DAV Services): Document the service.

Change-Id: I5345efd579f9e527eb8798397b52bf1b9b4cab56

gnu/services/dav.scm

@@ -0,0 +1,107 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2024 Wilko Meyer <w@wmeyer.eu>
+;;;
+;;; 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 dav)
+  #:use-module (gnu packages dav)
+  #:use-module (gnu services)
+  #:use-module (gnu services configuration)
+  #:use-module (gnu services shepherd)
+  #:use-module (guix deprecation)
+  #:use-module (guix gexp)
+  #:use-module (guix records)
+  #:use-module (ice-9 match)
+  #:export (xandikos-configuration
+            xandikos-configuration?
+            xandikos-service-type))
+
+;;;
+;;; Xandikos.
+;;;
+
+(define (port? x)
+  (and (number? x)
+       (and (>= x 0) (<= x 65535))))
+
+(define-configuration/no-serialization xandikos-configuration
+  (package
+    (file-like xandikos)
+    "Xandikos package to use.")
+  (directory
+   (string "/var/xandikos/dav")
+   "Directory to serve from.")
+  (listen-address
+   (string "127.0.0.1")
+   "The address Xandikos listens on.")
+  (port
+   (port 8080)
+   "The port to run Xandikos on.")
+  (current-user-principal
+   (string "/user/")
+   "Path to current user principal.")
+  (route-prefix
+   (string "/")
+   "Path to Xandikos. (Useful when Xandikos is behind a reverse proxy.)")
+  (defaults?
+    (boolean #t)
+    "Create initial calendar and address book.")
+  (dump?
+   (boolean #f)
+   "Print DAV XML request/responses.")
+  (avahi?
+   (boolean #f)
+   "Announce services with avahi.")
+  (autocreate?
+   (boolean #f)
+   "Automatically create necessary directories.")
+  (no-strict?
+   (boolean #f)
+   "Enable workarounds for buggy CalDAV/CardDAV client implementations."))
+
+(define (xandikos-shepherd-service config)
+  (match-record config <xandikos-configuration>
+                (package directory listen-address port current-user-principal
+                         route-prefix defaults? dump? avahi? autocreate?
+                         no-strict?)
+    (list
+     (shepherd-service
+       (provision '(xandikos))
+       (documentation "Caldav/CardDAV server")
+       (requirement '(networking user-processes))
+       (start #~(make-forkexec-constructor
+                 (list #$(file-append xandikos "/bin/xandikos")
+                       "--listen-address" #$listen-address
+                       "--port" #$(number->string port)
+                       "-d" #$directory
+                       "--route-prefix" #$route-prefix
+                       "--current-user-principal" #$current-user-principal
+                       #$@(if dump? '("--dump-dav-xml") '())
+                       #$@(if avahi? '("--avahi") '())
+                       #$@(if autocreate? '("--autocreate") '())
+                       #$@(if defaults? '("--defaults") '())
+                       #$@(if no-strict? '("--no-strict") '()))))
+       (stop #~(make-kill-destructor))
+       (respawn? #t)))))
+
+(define xandikos-service-type
+  (service-type
+    (name 'xandikos)
+    (extensions
+     (list (service-extension shepherd-root-service-type
+                              xandikos-shepherd-service)))
+    (default-value (xandikos-configuration))
+    (description "Service to run the @code{Xandikos} CalDAV/CardDAV server.")))