980 lines
32 KiB
Scheme
980 lines
32 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2017 Peter Mikkelsen <petermikkelsen10@gmail.com>
|
||
;;; Copyright © 2019 Ricardo Wurmus <rekado@elephly.net>
|
||
;;; Copyright © 2020 Ludovic Courtès <ludo@gnu.org>
|
||
;;; Copyright © 2022–2023 Bruno Victal <mirai@makinata.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 audio)
|
||
#:use-module (guix gexp)
|
||
#:use-module (guix deprecation)
|
||
#:use-module (guix diagnostics)
|
||
#:use-module (guix i18n)
|
||
#:use-module (guix modules)
|
||
#:use-module ((gnu services) #:hide (delete))
|
||
#:use-module (gnu services admin)
|
||
#:use-module (gnu services configuration)
|
||
#:use-module (gnu services shepherd)
|
||
#:use-module (gnu services admin)
|
||
#:use-module (gnu system shadow)
|
||
#:use-module (gnu packages admin)
|
||
#:use-module (gnu packages mpd)
|
||
#:use-module (guix records)
|
||
#:use-module (ice-9 format)
|
||
#:use-module (ice-9 match)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-26)
|
||
#:use-module (srfi srfi-71)
|
||
#:export (mpd-output
|
||
mpd-output?
|
||
mpd-output-name
|
||
mpd-output-type
|
||
mpd-output-enabled?
|
||
mpd-output-format
|
||
mpd-output-tags?
|
||
mpd-output-always-on?
|
||
mpd-output-mixer-type
|
||
mpd-output-replay-gain-handler
|
||
mpd-output-extra-options
|
||
|
||
mpd-plugin
|
||
mpd-plugin?
|
||
mpd-plugin-plugin
|
||
mpd-plugin-name
|
||
mpd-plugin-enabled?
|
||
mpd-plugin-extra-options
|
||
|
||
mpd-partition
|
||
mpd-partition?
|
||
mpd-partition-name
|
||
mpd-partition-extra-options
|
||
|
||
mpd-configuration
|
||
mpd-configuration?
|
||
mpd-configuration-package
|
||
mpd-configuration-user
|
||
mpd-configuration-group
|
||
mpd-configuration-shepherd-requirement
|
||
mpd-configuration-log-file
|
||
mpd-configuration-log-level
|
||
mpd-configuration-music-directory
|
||
mpd-configuration-music-dir
|
||
mpd-configuration-playlist-directory
|
||
mpd-configuration-playlist-dir
|
||
mpd-configuration-db-file
|
||
mpd-configuration-state-file
|
||
mpd-configuration-sticker-file
|
||
mpd-configuration-default-port
|
||
mpd-configuration-endpoints
|
||
mpd-configuration-address
|
||
mpd-configuration-database
|
||
mpd-configuration-partitions
|
||
mpd-configuration-neighbors
|
||
mpd-configuration-inputs
|
||
mpd-configuration-archive-plugins
|
||
mpd-configuration-input-cache-size
|
||
mpd-configuration-decoders
|
||
mpd-configuration-resampler
|
||
mpd-configuration-filters
|
||
mpd-configuration-outputs
|
||
mpd-configuration-playlist-plugins
|
||
mpd-configuration-extra-options
|
||
mpd-service-type
|
||
|
||
mympd-service-type
|
||
mympd-configuration
|
||
mympd-configuration?
|
||
mympd-configuration-package
|
||
mympd-configuration-shepherd-requirement
|
||
mympd-configuration-user
|
||
mympd-configuration-group
|
||
mympd-configuration-work-directory
|
||
mympd-configuration-cache-directory
|
||
mympd-configuration-acl
|
||
mympd-configuration-covercache-ttl
|
||
mympd-configuration-http?
|
||
mympd-configuration-host
|
||
mympd-configuration-port
|
||
mympd-configuration-log-level
|
||
mympd-configuration-log-to
|
||
mympd-configuration-lualibs
|
||
mympd-configuration-uri
|
||
mympd-configuration-script-acl
|
||
mympd-configuration-ssl?
|
||
mympd-configuration-ssl-port
|
||
mympd-configuration-ssl-cert
|
||
mympd-configuration-ssl-key
|
||
mympd-configuration-pin-hash
|
||
mympd-configuration-save-caches?
|
||
mympd-ip-acl
|
||
mympd-ip-acl?
|
||
mympd-ip-acl-allow
|
||
mympd-ip-acl-deny))
|
||
|
||
;;; Commentary:
|
||
;;;
|
||
;;; Audio related services
|
||
;;;
|
||
;;; Code:
|
||
|
||
(define (uglify-field-name field-name)
|
||
(let ((str (symbol->string field-name)))
|
||
(string-join (string-split (if (string-suffix? "?" str)
|
||
(string-drop-right str 1)
|
||
str)
|
||
#\-) "_")))
|
||
|
||
;; Helpers for deprecated field types, to be removed later.
|
||
(define %lazy-group (make-symbol "%lazy-group"))
|
||
|
||
(define (set-user-group user group)
|
||
(user-account
|
||
(inherit user)
|
||
(group (user-group-name group))))
|
||
|
||
|
||
;;;
|
||
;;; MPD
|
||
;;;
|
||
|
||
(define (mpd-serialize-field field-name value)
|
||
(let ((field (if (string? field-name) field-name
|
||
(uglify-field-name field-name)))
|
||
(value (cond
|
||
((boolean? value) (if value "yes" "no"))
|
||
((string? value) value)
|
||
(else (object->string value)))))
|
||
#~(format #f "~a ~s~%" #$field #$value)))
|
||
|
||
(define (mpd-serialize-alist field-name value)
|
||
#~(string-append #$@(generic-serialize-alist list mpd-serialize-field
|
||
value)))
|
||
|
||
(define mpd-serialize-string mpd-serialize-field)
|
||
(define mpd-serialize-boolean mpd-serialize-field)
|
||
|
||
(define (mpd-serialize-list-of-strings field-name value)
|
||
#~(string-append #$@(map (cut mpd-serialize-string field-name <>) value)))
|
||
|
||
(define (mpd-serialize-user-account field-name value)
|
||
(mpd-serialize-string field-name (user-account-name value)))
|
||
|
||
(define (mpd-serialize-user-group field-name value)
|
||
(mpd-serialize-string field-name (user-group-name value)))
|
||
|
||
(define-maybe string (prefix mpd-))
|
||
(define-maybe list-of-strings (prefix mpd-))
|
||
(define-maybe boolean (prefix mpd-))
|
||
|
||
(define %mpd-user
|
||
(user-account
|
||
(name "mpd")
|
||
;; XXX: This is a place-holder to be lazily substituted in (…-accounts)
|
||
;; with the value from the 'group' field of <mpd-configuration>.
|
||
(group %lazy-group)
|
||
(system? #t)
|
||
(comment "Music Player Daemon (MPD) user")
|
||
;; MPD can use $HOME (or $XDG_CONFIG_HOME) to place its data.
|
||
(home-directory "/var/lib/mpd")
|
||
(shell (file-append shadow "/sbin/nologin"))))
|
||
|
||
(define %mpd-group
|
||
(user-group
|
||
(name "mpd")
|
||
(system? #t)))
|
||
|
||
;;; TODO: Procedures for deprecated fields, to be removed.
|
||
|
||
(define mpd-deprecated-fields '((music-dir . music-directory)
|
||
(playlist-dir . playlist-directory)
|
||
(address . endpoints)))
|
||
|
||
(define (port? value) (or (string? value) (integer? value)))
|
||
|
||
(define (mpd-serialize-deprecated-field field-name value)
|
||
(if (maybe-value-set? value)
|
||
(begin
|
||
(warn-about-deprecation
|
||
field-name #f
|
||
#:replacement (assoc-ref mpd-deprecated-fields field-name))
|
||
(match field-name
|
||
('playlist-dir (mpd-serialize-string "playlist_directory" value))
|
||
('music-dir (mpd-serialize-string "music_directory" value))
|
||
('address (mpd-serialize-string "bind_to_address" value))))
|
||
""))
|
||
|
||
(define (mpd-serialize-port field-name value)
|
||
(when (string? value)
|
||
(warning
|
||
(G_ "string value for '~a' is deprecated, use integer instead~%")
|
||
field-name))
|
||
(mpd-serialize-field "port" value))
|
||
|
||
(define-maybe port (prefix mpd-))
|
||
|
||
;;; Procedures for unsupported value types, to be removed.
|
||
|
||
(define (mpd-user-sanitizer value)
|
||
(cond ((user-account? value) value)
|
||
((string? value)
|
||
(warning (G_ "string value for 'user' is deprecated, use \
|
||
user-account instead~%"))
|
||
(user-account
|
||
(inherit %mpd-user)
|
||
(name value)))
|
||
(else
|
||
(configuration-field-error #f 'user value))))
|
||
|
||
(define (mpd-group-sanitizer value)
|
||
(cond ((user-group? value) value)
|
||
((string? value)
|
||
(warning (G_ "string value for 'group' is deprecated, use \
|
||
user-group instead~%"))
|
||
(user-group
|
||
(inherit %mpd-group)
|
||
(name value)))
|
||
(else
|
||
(configuration-field-error #f 'group value))))
|
||
|
||
(define (mpd-log-file-sanitizer value)
|
||
(match value
|
||
(%unset-value
|
||
;; XXX: While leaving the 'sys_log' option out of the mpd.conf file is
|
||
;; supposed to cause logging to happen via systemd (elogind provides a
|
||
;; compatible interface), this doesn't work (nothing gets logged); use
|
||
;; syslog instead.
|
||
"syslog")
|
||
((? string?)
|
||
value)
|
||
(_ (configuration-field-error #f 'log-file value))))
|
||
|
||
;;;
|
||
|
||
;; Generic MPD plugin record, lists only the most prevalent fields.
|
||
(define-configuration mpd-plugin
|
||
(plugin
|
||
maybe-string
|
||
"Plugin name.")
|
||
|
||
(name
|
||
maybe-string
|
||
"Name.")
|
||
|
||
(enabled?
|
||
maybe-boolean
|
||
"Whether the plugin is enabled/disabled.")
|
||
|
||
(extra-options
|
||
(alist '())
|
||
"An association list of option symbols/strings to string values
|
||
to be appended to the plugin configuration. See
|
||
@uref{https://mpd.readthedocs.io/en/latest/plugins.html,MPD plugin reference}
|
||
for available options.")
|
||
|
||
(prefix mpd-))
|
||
|
||
(define (mpd-serialize-mpd-plugin field-name value)
|
||
#~(format #f "~a {~%~a}~%"
|
||
'#$field-name
|
||
#$(serialize-configuration value mpd-plugin-fields)))
|
||
|
||
(define (mpd-serialize-list-of-mpd-plugin field-name value)
|
||
#~(string-append #$@(map (cut mpd-serialize-mpd-plugin field-name <>)
|
||
value)))
|
||
|
||
(define list-of-mpd-plugin? (list-of mpd-plugin?))
|
||
|
||
(define-maybe mpd-plugin (prefix mpd-))
|
||
|
||
(define-configuration mpd-partition
|
||
(name
|
||
string
|
||
"Partition name.")
|
||
|
||
(extra-options
|
||
(alist '())
|
||
"An association list of option symbols/strings to string values
|
||
to be appended to the partition configuration. See
|
||
@uref{https://mpd.readthedocs.io/en/latest/user.html#configuring-partitions,Configuring Partitions}
|
||
for available options.")
|
||
|
||
(prefix mpd-))
|
||
|
||
(define (mpd-serialize-mpd-partition field-name value)
|
||
#~(format #f "partition {~%~a}~%"
|
||
#$(serialize-configuration value mpd-partition-fields)))
|
||
|
||
(define (mpd-serialize-list-of-mpd-partition field-name value)
|
||
#~(string-append #$@(map (cut mpd-serialize-mpd-partition #f <>) value)))
|
||
|
||
(define list-of-mpd-partition?
|
||
(list-of mpd-partition?))
|
||
|
||
(define-configuration mpd-output
|
||
(name
|
||
(string "MPD")
|
||
"The name of the audio output.")
|
||
|
||
(type
|
||
(string "pulse")
|
||
"The type of audio output.")
|
||
|
||
(enabled?
|
||
(boolean #t)
|
||
"Specifies whether this audio output is enabled when MPD is started. By
|
||
default, all audio outputs are enabled. This is just the default
|
||
setting when there is no state file; with a state file, the previous
|
||
state is restored.")
|
||
|
||
(format
|
||
maybe-string
|
||
"Force a specific audio format on output. See
|
||
@uref{https://mpd.readthedocs.io/en/latest/user.html#audio-output-format,Global Audio Format}
|
||
for a more detailed description.")
|
||
|
||
(tags?
|
||
(boolean #t)
|
||
"If set to @code{#f}, then MPD will not send tags to this output. This
|
||
is only useful for output plugins that can receive tags, for example the
|
||
@code{httpd} output plugin.")
|
||
|
||
(always-on?
|
||
(boolean #f)
|
||
"If set to @code{#t}, then MPD attempts to keep this audio output always
|
||
open. This may be useful for streaming servers, when you don’t want to
|
||
disconnect all listeners even when playback is accidentally stopped.")
|
||
|
||
(mixer-type
|
||
maybe-string
|
||
"This field accepts a string that specifies which mixer should be used for
|
||
this audio output: the @code{hardware} mixer, the @code{software} mixer, the
|
||
@code{null} mixer (allows setting the volume, but with no effect; this can be
|
||
used as a trick to implement an external mixer External Mixer) or no
|
||
mixer (@code{none}). When left unspecified, a @code{hardware} mixer is used
|
||
for devices that support it."
|
||
(sanitizer
|
||
(lambda (x) ; TODO: deprecated, remove me later.
|
||
(cond
|
||
((eq? %unset-value x)
|
||
x)
|
||
((symbol? x)
|
||
(warning (G_ "symbol value for 'mixer-type' is deprecated, \
|
||
use string instead~%"))
|
||
(symbol->string x))
|
||
((string? x) x)
|
||
(else
|
||
(configuration-field-error #f 'mixer-type x))))))
|
||
|
||
(replay-gain-handler
|
||
maybe-string
|
||
"This field accepts a string that specifies how
|
||
@uref{https://mpd.readthedocs.io/en/latest/user.html#replay-gain,Replay Gain}
|
||
is to be applied. @code{software} uses an internal software volume control,
|
||
@code{mixer} uses the configured (hardware) mixer control and @code{none}
|
||
disables replay gain on this audio output.")
|
||
|
||
(extra-options
|
||
(alist '())
|
||
"An association list of option symbols/strings to string values
|
||
to be appended to the audio output configuration.")
|
||
|
||
(prefix mpd-))
|
||
|
||
(define (mpd-serialize-mpd-output field-name value)
|
||
#~(format #f "audio_output {~%~a}~%"
|
||
#$(serialize-configuration value mpd-output-fields)))
|
||
|
||
(define (mpd-serialize-list-of-mpd-plugin-or-output field-name value)
|
||
(let ((plugins outputs (partition mpd-plugin? value)))
|
||
#~(string-append #$@(map (cut mpd-serialize-mpd-plugin "audio_output" <>)
|
||
plugins)
|
||
#$@(map (cut mpd-serialize-mpd-output #f <>) outputs))))
|
||
|
||
(define list-of-mpd-plugin-or-output?
|
||
(list-of (lambda (x)
|
||
(or (mpd-output? x) (mpd-plugin? x)))))
|
||
|
||
(define-configuration mpd-configuration
|
||
(package
|
||
(file-like mpd)
|
||
"The MPD package."
|
||
empty-serializer)
|
||
|
||
(user
|
||
(user-account %mpd-user)
|
||
"The user to run mpd as."
|
||
(sanitizer mpd-user-sanitizer))
|
||
|
||
(group
|
||
(user-group %mpd-group)
|
||
"The group to run mpd as."
|
||
(sanitizer mpd-group-sanitizer))
|
||
|
||
(shepherd-requirement
|
||
(list-of-symbols '())
|
||
"This is a list of symbols naming Shepherd services that this service
|
||
will depend on."
|
||
empty-serializer)
|
||
|
||
(environment-variables
|
||
(list-of-strings '("PULSE_CLIENTCONFIG=/etc/pulse/client.conf"
|
||
"PULSE_CONFIG=/etc/pulse/daemon.conf"))
|
||
"A list of strings specifying environment variables."
|
||
empty-serializer)
|
||
|
||
(log-file
|
||
maybe-string
|
||
"The location of the log file. Unless specified, logs are sent to the
|
||
local syslog daemon. Alternatively, a log file name can be specified, for
|
||
example @file{/var/log/mpd.log}."
|
||
(sanitizer mpd-log-file-sanitizer))
|
||
|
||
(log-level
|
||
maybe-string
|
||
"Supress any messages below this threshold.
|
||
The available values, in decreasing order of verbosity, are: @code{verbose},
|
||
@code{info}, @code{notice}, @code{warning} and @code{error}.")
|
||
|
||
(music-directory
|
||
maybe-string
|
||
"The directory to scan for music files.")
|
||
|
||
(music-dir ; TODO: deprecated, remove later
|
||
maybe-string
|
||
"The directory to scan for music files."
|
||
(serializer mpd-serialize-deprecated-field))
|
||
|
||
(playlist-directory
|
||
maybe-string
|
||
"The directory to store playlists.")
|
||
|
||
(playlist-dir ; TODO: deprecated, remove later
|
||
maybe-string
|
||
"The directory to store playlists."
|
||
(serializer mpd-serialize-deprecated-field))
|
||
|
||
(db-file
|
||
maybe-string
|
||
"The location of the music database. When left unspecified,
|
||
@file{~/.cache/db} is used.")
|
||
|
||
(state-file
|
||
maybe-string
|
||
"The location of the file that stores current MPD's state.")
|
||
|
||
(sticker-file
|
||
maybe-string
|
||
"The location of the sticker database.")
|
||
|
||
(default-port
|
||
(maybe-port 6600)
|
||
"The default port to run mpd on.")
|
||
|
||
(endpoints
|
||
maybe-list-of-strings
|
||
"The addresses that mpd will bind to. A port different from
|
||
@var{default-port} may be specified, e.g. @code{localhost:6602} and
|
||
IPv6 addresses must be enclosed in square brackets when a different
|
||
port is used.
|
||
To use a Unix domain socket, an absolute path or a path starting with @code{~}
|
||
can be specified here."
|
||
(serializer
|
||
(lambda (_ endpoints)
|
||
(if (maybe-value-set? endpoints)
|
||
(mpd-serialize-list-of-strings "bind_to_address" endpoints)
|
||
""))))
|
||
|
||
(address ; TODO: deprecated, remove later
|
||
maybe-string
|
||
"The address that mpd will bind to.
|
||
To use a Unix domain socket, an absolute path can be specified here."
|
||
(serializer mpd-serialize-deprecated-field))
|
||
|
||
(database
|
||
maybe-mpd-plugin
|
||
"MPD database plugin configuration.")
|
||
|
||
(partitions
|
||
(list-of-mpd-partition '())
|
||
"List of MPD \"partitions\".")
|
||
|
||
(neighbors
|
||
(list-of-mpd-plugin '())
|
||
"List of MPD neighbor plugin configurations.")
|
||
|
||
(inputs
|
||
(list-of-mpd-plugin '())
|
||
"List of MPD input plugin configurations."
|
||
(serializer (lambda (_ x)
|
||
(mpd-serialize-list-of-mpd-plugin "input" x))))
|
||
|
||
(archive-plugins
|
||
(list-of-mpd-plugin '())
|
||
"List of MPD archive plugin configurations."
|
||
(serializer (lambda (_ x)
|
||
(mpd-serialize-list-of-mpd-plugin "archive_plugin" x))))
|
||
|
||
(auto-update?
|
||
maybe-boolean
|
||
"Whether to automatically update the music database when files are changed
|
||
in the @var{music-directory}.")
|
||
|
||
(input-cache-size
|
||
maybe-string
|
||
"MPD input cache size."
|
||
(serializer (lambda (_ x)
|
||
(if (maybe-value-set? x)
|
||
#~(string-append "\ninput_cache {\n"
|
||
#$(mpd-serialize-string "size" x)
|
||
"}\n") ""))))
|
||
|
||
(decoders
|
||
(list-of-mpd-plugin '())
|
||
"List of MPD decoder plugin configurations."
|
||
(serializer (lambda (_ x)
|
||
(mpd-serialize-list-of-mpd-plugin "decoder" x))))
|
||
|
||
(resampler
|
||
maybe-mpd-plugin
|
||
"MPD resampler plugin configuration.")
|
||
|
||
(filters
|
||
(list-of-mpd-plugin '())
|
||
"List of MPD filter plugin configurations."
|
||
(serializer (lambda (_ x)
|
||
(mpd-serialize-list-of-mpd-plugin "filter" x))))
|
||
|
||
(outputs
|
||
(list-of-mpd-plugin-or-output (list (mpd-output)))
|
||
"The audio outputs that MPD can use.
|
||
By default this is a single output using pulseaudio.")
|
||
|
||
(playlist-plugins
|
||
(list-of-mpd-plugin '())
|
||
"List of MPD playlist plugin configurations."
|
||
(serializer (lambda (_ x)
|
||
(mpd-serialize-list-of-mpd-plugin "playlist_plugin" x))))
|
||
|
||
(extra-options
|
||
(alist '())
|
||
"An association list of option symbols/strings to string values to be
|
||
appended to the configuration.")
|
||
|
||
(prefix mpd-))
|
||
|
||
(define (mpd-serialize-configuration configuration)
|
||
(mixed-text-file
|
||
"mpd.conf"
|
||
(serialize-configuration configuration mpd-configuration-fields)))
|
||
|
||
(define (mpd-log-rotation config)
|
||
(match-record config <mpd-configuration>
|
||
(log-file)
|
||
(if (string=? "syslog" log-file)
|
||
'() ;nothing to do
|
||
(list (log-rotation
|
||
(files (list log-file))
|
||
(post-rotate #~(begin
|
||
(use-modules (gnu services herd))
|
||
(with-shepherd-action 'mpd ('reopen) #f))))))))
|
||
|
||
(define (mpd-shepherd-service config)
|
||
(match-record config <mpd-configuration>
|
||
(user package shepherd-requirement
|
||
log-file playlist-directory
|
||
db-file state-file sticker-file
|
||
environment-variables)
|
||
(let ((config-file (mpd-serialize-configuration config))
|
||
(username (user-account-name user)))
|
||
(shepherd-service
|
||
(documentation "Run the MPD (Music Player Daemon)")
|
||
(requirement `(user-processes loopback
|
||
,@(if (string=? "syslog" log-file)
|
||
'(syslogd)
|
||
'())
|
||
,@shepherd-requirement))
|
||
(provision '(mpd))
|
||
(start
|
||
(with-imported-modules (source-module-closure
|
||
'((gnu build activation)))
|
||
#~(begin
|
||
(use-modules (gnu build activation))
|
||
|
||
(let ((home #$(user-account-home-directory user)))
|
||
(let ((user (getpw #$username))
|
||
(default-cache-dir (string-append home "/.cache")))
|
||
|
||
(define (init-directory directory)
|
||
(unless (file-exists? directory)
|
||
(mkdir-p/perms directory user #o755)))
|
||
|
||
;; Define a cache location that can be automatically used
|
||
;; for the database file, in case it hasn't been explicitly
|
||
;; specified.
|
||
(for-each
|
||
init-directory
|
||
(cons default-cache-dir
|
||
'#$(map dirname
|
||
;; XXX: Delete the potential "syslog"
|
||
;; log-file value, which is not a directory.
|
||
(delete "syslog"
|
||
(filter-map maybe-value
|
||
(list db-file
|
||
log-file
|
||
state-file
|
||
sticker-file)))))))
|
||
|
||
(make-forkexec-constructor
|
||
(list #$(file-append package "/bin/mpd") "--no-daemon"
|
||
#$config-file)
|
||
#:environment-variables
|
||
;; Set HOME so MPD can infer default paths, such as
|
||
;; for the database file.
|
||
(cons (string-append "HOME=" home)
|
||
'#$environment-variables))))))
|
||
(stop #~(make-kill-destructor))
|
||
(actions
|
||
(list (shepherd-configuration-action config-file)
|
||
(shepherd-action
|
||
(name 'reopen)
|
||
(documentation "Re-open log files and flush caches.")
|
||
(procedure
|
||
#~(lambda (pid)
|
||
(if pid
|
||
(begin
|
||
(kill pid SIGHUP)
|
||
(format #t
|
||
"Issued SIGHUP to Service MPD (PID ~a)."
|
||
pid))
|
||
(format #t "Service MPD is not running.")))))))))))
|
||
|
||
(define (mpd-accounts config)
|
||
(match-record config <mpd-configuration> (user group)
|
||
;; TODO: Deprecation code, to be removed.
|
||
(let ((user (if (eq? (user-account-group user) %lazy-group)
|
||
(set-user-group user group)
|
||
user)))
|
||
(list user group))))
|
||
|
||
(define mpd-service-type
|
||
(service-type
|
||
(name 'mpd)
|
||
(description "Run the Music Player Daemon (MPD).")
|
||
(extensions
|
||
(list (service-extension shepherd-root-service-type
|
||
(compose list mpd-shepherd-service))
|
||
(service-extension account-service-type mpd-accounts)
|
||
(service-extension rottlog-service-type mpd-log-rotation)))
|
||
(default-value (mpd-configuration))))
|
||
|
||
|
||
;;;
|
||
;;; myMPD
|
||
;;;
|
||
|
||
(define (string-or-symbol? x)
|
||
(or (symbol? x) (string? x)))
|
||
|
||
(define-configuration/no-serialization mympd-ip-acl
|
||
(allow
|
||
(list-of-strings '())
|
||
"Allowed IP addresses.")
|
||
|
||
(deny
|
||
(list-of-strings '())
|
||
"Disallowed IP addresses."))
|
||
|
||
(define-maybe/no-serialization integer)
|
||
(define-maybe/no-serialization mympd-ip-acl)
|
||
|
||
(define %mympd-user
|
||
(user-account
|
||
(name "mympd")
|
||
;; XXX: This is a place-holder to be lazily substituted in 'mympd-accounts'
|
||
;; with the value from the 'group' field of <mympd-configuration>.
|
||
(group %lazy-group)
|
||
(system? #t)
|
||
(comment "myMPD user")
|
||
(home-directory "/var/empty")
|
||
(shell (file-append shadow "/sbin/nologin"))))
|
||
|
||
(define %mympd-group
|
||
(user-group
|
||
(name "mympd")
|
||
(system? #t)))
|
||
|
||
;;; TODO: Procedures for unsupported value types, to be removed.
|
||
(define (mympd-user-sanitizer value)
|
||
(cond ((user-account? value) value)
|
||
((string? value)
|
||
(warning (G_ "string value for 'user' is not supported, use \
|
||
user-account instead~%"))
|
||
(user-account
|
||
(inherit %mympd-user)
|
||
(name value)))
|
||
(else
|
||
(configuration-field-error #f 'user value))))
|
||
|
||
(define (mympd-group-sanitizer value)
|
||
(cond ((user-group? value) value)
|
||
((string? value)
|
||
(warning (G_ "string value for 'group' is not supported, use \
|
||
user-group instead~%"))
|
||
(user-group
|
||
(inherit %mympd-group)
|
||
(name value)))
|
||
(else
|
||
(configuration-field-error #f 'group value))))
|
||
|
||
(define (mympd-log-to-sanitizer value)
|
||
(match value
|
||
('syslog
|
||
(warning (G_ "syslog symbol value for 'log-to' is deprecated~%"))
|
||
%unset-value)
|
||
((or %unset-value (? string?))
|
||
value)
|
||
(_ (configuration-field-error #f 'log-to value))))
|
||
|
||
;; XXX: The serialization procedures are insufficient since we require
|
||
;; access to multiple fields at once.
|
||
;; Fields marked with empty-serializer are never serialized and are
|
||
;; used for command-line arguments or by the service definition.
|
||
(define-configuration/no-serialization mympd-configuration
|
||
(package
|
||
(file-like mympd)
|
||
"The package object of the myMPD server."
|
||
empty-serializer)
|
||
|
||
(shepherd-requirement
|
||
(list-of-symbols '())
|
||
"This is a list of symbols naming Shepherd services that this service
|
||
will depend on."
|
||
empty-serializer)
|
||
|
||
(user
|
||
(user-account %mympd-user)
|
||
"Owner of the @command{mympd} process."
|
||
(sanitizer mympd-user-sanitizer)
|
||
empty-serializer)
|
||
|
||
(group
|
||
(user-group %mympd-group)
|
||
"Owner group of the @command{mympd} process."
|
||
(sanitizer mympd-group-sanitizer)
|
||
empty-serializer)
|
||
|
||
(work-directory
|
||
(string "/var/lib/mympd")
|
||
"Where myMPD will store its data."
|
||
empty-serializer)
|
||
|
||
(cache-directory
|
||
(string "/var/cache/mympd")
|
||
"Where myMPD will store its cache."
|
||
empty-serializer)
|
||
|
||
(acl
|
||
maybe-mympd-ip-acl
|
||
"ACL to access the myMPD webserver.")
|
||
|
||
(covercache-ttl
|
||
(maybe-integer 31)
|
||
"How long to keep cached covers, @code{0} disables cover caching.")
|
||
|
||
(http?
|
||
(boolean #t)
|
||
"HTTP support.")
|
||
|
||
(host
|
||
(string "[::]")
|
||
"Host name to listen on.")
|
||
|
||
(port
|
||
(maybe-port 80)
|
||
"HTTP port to listen on.")
|
||
|
||
(log-level
|
||
(integer 5)
|
||
"How much detail to include in logs, possible values: @code{0} to @code{7}.")
|
||
|
||
(log-to
|
||
maybe-string
|
||
"Where to send logs. Unless specified, the service logs to the local
|
||
syslog service under the @samp{daemon} facility. Alternatively, a log file
|
||
name can be specified, for example @file{/var/log/mympd.log}."
|
||
(sanitizer mympd-log-to-sanitizer)
|
||
empty-serializer)
|
||
|
||
(lualibs
|
||
(maybe-string "all")
|
||
"See
|
||
@url{https://jcorporation.github.io/myMPD/scripting/#lua-standard-libraries}.")
|
||
|
||
(uri
|
||
maybe-string
|
||
"Override URI to myMPD.
|
||
See @url{https://github.com/jcorporation/myMPD/issues/950}.")
|
||
|
||
(script-acl
|
||
(maybe-mympd-ip-acl (mympd-ip-acl
|
||
(allow '("127.0.0.1"))))
|
||
"ACL to access the myMPD script backend.")
|
||
|
||
(ssl?
|
||
(boolean #f)
|
||
"SSL/TLS support.")
|
||
|
||
(ssl-port
|
||
(maybe-port 443)
|
||
"Port to listen for HTTPS.")
|
||
|
||
(ssl-cert
|
||
maybe-string
|
||
"Path to PEM encoded X.509 SSL/TLS certificate (public key).")
|
||
|
||
(ssl-key
|
||
maybe-string
|
||
"Path to PEM encoded SSL/TLS private key.")
|
||
|
||
(pin-hash
|
||
maybe-string
|
||
"SHA-256 hashed pin used by myMPD to control settings access by
|
||
prompting a pin from the user.")
|
||
|
||
(save-caches?
|
||
maybe-boolean
|
||
"Whether to preserve caches between service restarts."))
|
||
|
||
(define (mympd-serialize-configuration config)
|
||
(define serialize-value
|
||
(match-lambda
|
||
((? boolean? val) (if val "true" "false"))
|
||
((? integer? val) (number->string val))
|
||
((? mympd-ip-acl? val) (ip-acl-serialize-configuration val))
|
||
((? string? val) val)))
|
||
|
||
(define (ip-acl-serialize-configuration config)
|
||
(define (serialize-list-of-strings prefix lst)
|
||
(map (cut format #f "~a~a" prefix <>) lst))
|
||
(string-join
|
||
(append
|
||
(serialize-list-of-strings "+" (mympd-ip-acl-allow config))
|
||
(serialize-list-of-strings "-" (mympd-ip-acl-deny config))) ","))
|
||
|
||
;; myMPD configuration fields are serialized as individual files under
|
||
;; <work-directory>/config/.
|
||
(match-record config <mympd-configuration> (work-directory acl
|
||
covercache-ttl http? host port
|
||
log-level lualibs uri script-acl
|
||
ssl? ssl-port ssl-cert ssl-key
|
||
pin-hash save-caches?)
|
||
(define (serialize-field filename value)
|
||
(when (maybe-value-set? value)
|
||
(list (format #f "~a/config/~a" work-directory filename)
|
||
(mixed-text-file filename (serialize-value value)))))
|
||
|
||
(let ((filename-to-field `(("acl" . ,acl)
|
||
("covercache_keep_days" . ,covercache-ttl)
|
||
("http" . ,http?)
|
||
("http_host" . ,host)
|
||
("http_port" . ,port)
|
||
("loglevel" . ,log-level)
|
||
("lualibs" . ,lualibs)
|
||
("mympd_uri" . ,uri)
|
||
("scriptacl" . ,script-acl)
|
||
("ssl" . ,ssl?)
|
||
("ssl_port" . ,ssl-port)
|
||
("ssl_cert" . ,ssl-cert)
|
||
("ssl_key" . ,ssl-key)
|
||
("pin_hash" . ,pin-hash)
|
||
("save_caches" . ,save-caches?))))
|
||
(filter list?
|
||
(generic-serialize-alist list serialize-field
|
||
filename-to-field)))))
|
||
|
||
(define (mympd-shepherd-service config)
|
||
(match-record config <mympd-configuration>
|
||
(package shepherd-requirement user work-directory cache-directory
|
||
log-level log-to)
|
||
(shepherd-service
|
||
(documentation "Run the myMPD daemon.")
|
||
(requirement `(loopback user-processes
|
||
,@(if (maybe-value-set? log-to)
|
||
'()
|
||
'(syslogd))
|
||
,@shepherd-requirement))
|
||
(provision '(mympd))
|
||
(start
|
||
(let ((username (user-account-name user)))
|
||
(with-imported-modules (source-module-closure
|
||
'((gnu build activation)))
|
||
#~(begin
|
||
(use-modules (gnu build activation))
|
||
|
||
(let ((user (getpw #$username)))
|
||
|
||
(define (init-directory directory)
|
||
(unless (file-exists? directory)
|
||
(mkdir-p/perms directory user #o755)))
|
||
|
||
(for-each init-directory
|
||
'#$(map dirname (filter-map maybe-value
|
||
(list log-to
|
||
work-directory
|
||
cache-directory)))))
|
||
|
||
(make-forkexec-constructor
|
||
`(#$(file-append package "/bin/mympd")
|
||
"--user" #$username
|
||
#$@(if (eq? log-to 'syslog) '("--syslog") '())
|
||
"--workdir" #$work-directory
|
||
"--cachedir" #$cache-directory)
|
||
#:environment-variables
|
||
(list #$(format #f "MYMPD_LOGLEVEL=~a" log-level))
|
||
#:log-file #$(maybe-value log-to)))))))))
|
||
|
||
(define (mympd-accounts config)
|
||
(match-record config <mympd-configuration> (user group)
|
||
;; TODO: Deprecation code, to be removed.
|
||
(let ((user (if (eq? (user-account-group user) %lazy-group)
|
||
(set-user-group user group)
|
||
user)))
|
||
(list user group))))
|
||
|
||
(define (mympd-log-rotation config)
|
||
(match-record config <mympd-configuration>
|
||
(log-to)
|
||
(if (maybe-value-set? log-to)
|
||
(list (log-rotation
|
||
(files (list log-to))))
|
||
'())))
|
||
|
||
(define mympd-service-type
|
||
(service-type
|
||
(name 'mympd)
|
||
(extensions
|
||
(list (service-extension shepherd-root-service-type
|
||
(compose list mympd-shepherd-service))
|
||
(service-extension account-service-type
|
||
mympd-accounts)
|
||
(service-extension special-files-service-type
|
||
mympd-serialize-configuration)
|
||
(service-extension rottlog-service-type
|
||
mympd-log-rotation)))
|
||
(description "Run myMPD, a frontend for MPD. (Music Player Daemon)")
|
||
(default-value (mympd-configuration))))
|