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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2021 Oleg Pykhalov <go.wigust@gmail.com>
+;;;
+;;; 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 syncthing)
+  #:use-module (gnu packages syncthing)
+  #:use-module (gnu services)
+  #:use-module (gnu services shepherd)
+  #:use-module (guix gexp)
+  #:use-module (guix records)
+  #:use-module (ice-9 match)
+  #:use-module (srfi srfi-1)
+  #:export (syncthing-configuration
+            syncthing-configuration?
+            syncthing-service-type))
+
+;;; Commentary:
+;;;
+;;; This module provides a service definition for the syncthing service.
+;;;
+;;; Code:
+
+(define-record-type* <syncthing-configuration>
+  syncthing-configuration make-syncthing-configuration
+  syncthing-configuration?
+  (syncthing syncthing-configuration-syncthing ;<package>
+             (default syncthing))
+  (arguments syncthing-configuration-arguments ;list of strings
+             (default '()))
+  (logflags  syncthing-configuration-logflags  ;number
+             (default 0))
+  (user      syncthing-configuration-user      ;string
+             (default #f))
+  (group     syncthing-configuration-group     ;string
+             (default "users"))
+  (home      syncthing-configuration-home      ;string
+             (default #f)))
+
+(define syncthing-shepherd-service
+  (match-lambda
+    (($ <syncthing-configuration> syncthing arguments logflags user group home)
+     (list
+      (shepherd-service
+       (provision (list (string->symbol (string-append "syncthing-" user))))
+       (documentation "Run syncthing.")
+       (requirement '(loopback))
+       (start #~(make-forkexec-constructor
+                 (append (list (string-append #$syncthing "/bin/syncthing")
+                               "-no-browser"
+                               "-no-restart"
+                               (string-append "-logflags=" (number->string #$logflags)))
+                         '#$arguments)
+                 #:user #$user
+                 #:group #$group
+                 #:environment-variables
+                 (append (list (string-append "HOME=" (or #$home (passwd:dir (getpw #$user))))
+                               "SSL_CERT_DIR=/etc/ssl/certs"
+                               "SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt")
+                         (remove (lambda (str)
+                                   (or (string-prefix? "HOME=" str)
+                                       (string-prefix? "SSL_CERT_DIR=" str)
+                                       (string-prefix? "SSL_CERT_FILE=" str)))
+                                 (environ)))))
+       (respawn? #f)
+       (stop #~(make-kill-destructor)))))))
+
+(define syncthing-service-type
+  (service-type (name 'syncthing)
+                (extensions (list (service-extension shepherd-root-service-type
+                                                     syncthing-shepherd-service)))
+                (description
+                 "Run @uref{https://github.com/syncthing/syncthing, Syncthing}
+decentralized continuous file system synchronization.")))
+
+;;; syncthing.scm ends here