services: bitlbee: Move to (gnu services messaging).

* gnu/services/networking.scm (<bitlbee-configuration>)
(bitlbee-shepherd-service, %bitlbee-accounts, %bitlbee-activation)
(bitlbee-service-type, bitlbee-service): Move to...
* gnu/services/messaging.scm: ... here.
* doc/guix.texi (Networking Services): Move 'bitlbee-service' doc to...
(Messaging Services): ... here.

1 files changed, 116 insertions, 1 deletions

diff --git a/gnu/services/messaging.scm b/gnu/services/messaging.scm
index a9820ed21ff..c0ccdbad335 100644
--- a/gnu/services/messaging.scm
+++ b/gnu/services/messaging.scm
@@ -1,6 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
 ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
+;;; Copyright © 2015, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -25,6 +26,7 @@
   #:use-module (gnu services configuration)
   #:use-module (gnu system shadow)
   #:use-module (guix gexp)
+  #:use-module (guix modules)
   #:use-module (guix records)
   #:use-module (guix packages)
   #:use-module (srfi srfi-1)
@@ -42,7 +44,12 @@
             ssl-configuration
 
             %default-modules-enabled
-            prosody-configuration-pidfile))
+            prosody-configuration-pidfile
+
+            bitlbee-configuration
+            bitlbee-configuration?
+            bitlbee-service
+            bitlbee-service-type))
 
 ;;; Commentary:
 ;;;
@@ -751,3 +758,111 @@ string, you could instantiate a prosody service like this:
          (opaque-prosody-configuration
           (prosody.cfg.lua \"\")))
 @end example"))
+
+
+;;;
+;;; BitlBee.
+;;;
+
+(define-record-type* <bitlbee-configuration>
+  bitlbee-configuration make-bitlbee-configuration
+  bitlbee-configuration?
+  (bitlbee bitlbee-configuration-bitlbee
+           (default bitlbee))
+  (interface bitlbee-configuration-interface
+             (default "127.0.0.1"))
+  (port bitlbee-configuration-port
+        (default 6667))
+  (extra-settings bitlbee-configuration-extra-settings
+                  (default "")))
+
+(define bitlbee-shepherd-service
+  (match-lambda
+    (($ <bitlbee-configuration> bitlbee interface port extra-settings)
+     (let ((conf (plain-file "bitlbee.conf"
+                             (string-append "
+  [settings]
+  User = bitlbee
+  ConfigDir = /var/lib/bitlbee
+  DaemonInterface = " interface "
+  DaemonPort = " (number->string port) "
+" extra-settings))))
+
+       (with-imported-modules (source-module-closure
+                               '((gnu build shepherd)
+                                 (gnu system file-systems)))
+         (list (shepherd-service
+                (provision '(bitlbee))
+
+                ;; Note: If networking is not up, then /etc/resolv.conf
+                ;; doesn't get mapped in the container, hence the dependency
+                ;; on 'networking'.
+                (requirement '(user-processes networking))
+
+                (modules '((gnu build shepherd)
+                           (gnu system file-systems)))
+                (start #~(make-forkexec-constructor/container
+                          (list #$(file-append bitlbee "/sbin/bitlbee")
+                                "-n" "-F" "-u" "bitlbee" "-c" #$conf)
+
+                          #:pid-file "/var/run/bitlbee.pid"
+                          #:mappings (list (file-system-mapping
+                                            (source "/var/lib/bitlbee")
+                                            (target source)
+                                            (writable? #t)))))
+                (stop  #~(make-kill-destructor)))))))))
+
+(define %bitlbee-accounts
+  ;; User group and account to run BitlBee.
+  (list (user-group (name "bitlbee") (system? #t))
+        (user-account
+         (name "bitlbee")
+         (group "bitlbee")
+         (system? #t)
+         (comment "BitlBee daemon user")
+         (home-directory "/var/empty")
+         (shell (file-append shadow "/sbin/nologin")))))
+
+(define %bitlbee-activation
+  ;; Activation gexp for BitlBee.
+  #~(begin
+      (use-modules (guix build utils))
+
+      ;; This directory is used to store OTR data.
+      (mkdir-p "/var/lib/bitlbee")
+      (let ((user (getpwnam "bitlbee")))
+        (chown "/var/lib/bitlbee"
+               (passwd:uid user) (passwd:gid user)))))
+
+(define bitlbee-service-type
+  (service-type (name 'bitlbee)
+                (extensions
+                 (list (service-extension shepherd-root-service-type
+                                          bitlbee-shepherd-service)
+                       (service-extension account-service-type
+                                          (const %bitlbee-accounts))
+                       (service-extension activation-service-type
+                                          (const %bitlbee-activation))))
+                (default-value (bitlbee-configuration))
+                (description
+                 "Run @url{http://bitlbee.org,BitlBee}, a daemon that acts as
+a gateway between IRC and chat networks.")))
+
+(define* (bitlbee-service #:key (bitlbee bitlbee)
+                          (interface "127.0.0.1") (port 6667)
+                          (extra-settings ""))
+  "Return a service that runs @url{http://bitlbee.org,BitlBee}, a daemon that
+acts as a gateway between IRC and chat networks.
+
+The daemon will listen to the interface corresponding to the IP address
+specified in @var{interface}, on @var{port}.  @code{127.0.0.1} means that only
+local clients can connect, whereas @code{0.0.0.0} means that connections can
+come from any networking interface.
+
+In addition, @var{extra-settings} specifies a string to append to the
+configuration file."
+  (service bitlbee-service-type
+           (bitlbee-configuration
+            (bitlbee bitlbee)
+            (interface interface) (port port)
+            (extra-settings extra-settings))))