diff options
Diffstat (limited to 'gnu')
| -rw-r--r-- | gnu/services/audio.scm | 493 |
1 files changed, 394 insertions, 99 deletions
diff --git a/gnu/services/audio.scm b/gnu/services/audio.scm index b7cb0ebe38..2bb8f66c96 100644 --- a/gnu/services/audio.scm +++ b/gnu/services/audio.scm @@ -21,9 +21,13 @@ (define-module (gnu services audio) #:use-module (guix gexp) + #:use-module (guix deprecation) + #:use-module (guix diagnostics) + #:use-module (guix i18n) #:use-module (gnu services) #: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) @@ -31,10 +35,61 @@ #: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)) ;;; Commentary: @@ -50,34 +105,125 @@ str) #\-) "_"))) +(define list-of-string? + (list-of string?)) + +(define list-of-symbol? + (list-of symbol?)) + (define (mpd-serialize-field field-name value) - #~(format #f "~a ~s~%" #$(if (string? field-name) - field-name - (uglify-field-name field-name)) - #$(if (string? value) - value - (object->string 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 #$@(generic-serialize-alist list mpd-serialize-field value))) (define mpd-serialize-string mpd-serialize-field) +(define mpd-serialize-boolean mpd-serialize-field) -(define (mpd-serialize-boolean field-name value) - (mpd-serialize-field field-name (if value "yes" "no"))) +(define (mpd-serialize-list-of-string field-name value) + #~(string-concatenate #$(map (cut mpd-serialize-string field-name <>) value))) -(define (mpd-serialize-list-of-mpd-output field-name value) - #~(string-append "\naudio_output {\n" - #$@(map (cut serialize-configuration <> - mpd-output-fields) - value) - "}\n")) +(define-maybe string (prefix mpd-)) +(define-maybe list-of-string (prefix mpd-)) +(define-maybe boolean (prefix mpd-)) -(define (mpd-serialize-configuration configuration) - (mixed-text-file - "mpd.conf" - (serialize-configuration configuration mpd-configuration-fields))) +;;; TODO: Procedures for deprecated fields, to be removed. + +(define mpd-deprecated-fields '((music-dir . music-directory) + (playlist-dir . playlist-directory) + (address . endpoints))) + +(define (port? value) (or (string? value) (integer? value))) + +(define (mpd-serialize-deprecated-field field-name value) + (if (maybe-value-set? value) + (begin + (warn-about-deprecation + field-name #f + #:replacement (assoc-ref mpd-deprecated-fields field-name)) + (match field-name + ('playlist-dir (mpd-serialize-string "playlist_directory" value)) + ('music-dir (mpd-serialize-string "music_directory" value)) + ('address (mpd-serialize-string "bind_to_address" value)))) + "")) + +(define (mpd-serialize-port field-name value) + (when (string? value) + (warning + (G_ "string value for '~a' is deprecated, use integer instead~%") + field-name)) + (mpd-serialize-field "port" value)) + +(define-maybe port (prefix mpd-)) + +;;; + +;; Generic MPD plugin record, lists only the most prevalent fields. +(define-configuration mpd-plugin + (plugin + maybe-string + "Plugin name.") + + (name + maybe-string + "Name.") + + (enabled? + maybe-boolean + "Whether the plugin is enabled/disabled.") + + (extra-options + (alist '()) + "An association list of option symbols/strings to string values +to be appended to the plugin configuration. See +@uref{https://mpd.readthedocs.io/en/latest/plugins.html,MPD plugin reference} +for available options.") + + (prefix mpd-)) + +(define (mpd-serialize-mpd-plugin field-name value) + #~(format #f "~a {~%~a}~%" + '#$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 @@ -95,6 +241,12 @@ 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 @@ -109,125 +261,268 @@ disconnect all listeners even when playback is accidentally stopped.") (mixer-type (string "none") - "This field accepts a symbol that specifies which mixer should be used + "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}).") + (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 to string values to be appended to -the audio output configuration.") + "An association list of option symbols/strings to string values +to be appended to the audio output configuration.") (prefix mpd-)) -(define list-of-mpd-output? - (list-of mpd-output?)) +(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 (string "mpd") "The user to run mpd as.") - (music-dir - (string "~/Music") + (group + (string "mpd") + "The group to run mpd as.") + + (shepherd-requirement + (list-of-symbol '()) + "This is a list of symbols naming Shepherd services that this service +will depend on." + empty-serializer) + + (log-file + (maybe-string "/var/log/mpd/log") + "The location of the log file. Set to @code{syslog} to use the +local syslog daemon or @code{%unset-value} to omit this directive +from the configuration file.") + + (log-level + maybe-string + "Supress any messages below this threshold. +Available values: @code{notice}, @code{info}, @code{verbose}, +@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." - (lambda (_ x) - (mpd-serialize-field "music_directory" x))) + mpd-serialize-deprecated-field) + + (playlist-directory + maybe-string + "The directory to store playlists.") - (playlist-dir - (string "~/.mpd/playlists") + (playlist-dir ; TODO: deprecated, remove later + maybe-string "The directory to store playlists." - (lambda (_ x) - (mpd-serialize-field "playlist_directory" x))) + mpd-serialize-deprecated-field) (db-file - (string "~/.mpd/tag_cache") + maybe-string "The location of the music database.") (state-file - (string "~/.mpd/state") + maybe-string "The location of the file that stores current MPD's state.") (sticker-file - (string "~/.mpd/sticker.sql") + maybe-string "The location of the sticker database.") - (port - (string "6600") - "The port to run mpd on.") - - (address - (string "any") + (default-port + (maybe-port 6600) + "The default port to run mpd on.") + + (endpoints + maybe-list-of-string + "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." + (lambda (_ endpoints) + (if (maybe-value-set? endpoints) + (mpd-serialize-list-of-string "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." + 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." (lambda (_ x) - (mpd-serialize-field "bind_to_address" x))) + (mpd-serialize-list-of-mpd-plugin "input" x))) + + (archive-plugins + (list-of-mpd-plugin '()) + "List of MPD archive plugin configurations." + (lambda (_ x) + (mpd-serialize-list-of-mpd-plugin "archive_plugin" x))) + + (input-cache-size + maybe-string + "MPD input cache size." + (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." + (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." + (lambda (_ x) + (mpd-serialize-list-of-mpd-plugin "filter" x))) (outputs - (list-of-mpd-output (list (mpd-output))) + (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." + (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-file-name config file) - "Return a path in /var/run/mpd/ that is writable - by @code{user} from @code{config}." - (string-append "/var/run/mpd/" - (mpd-configuration-user config) - "/" file)) +(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) + (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) - (shepherd-service - (documentation "Run the MPD (Music Player Daemon)") - (requirement '(user-processes)) - (provision '(mpd)) - (start #~(make-forkexec-constructor - (list #$(file-append mpd "/bin/mpd") - "--no-daemon" - #$(mpd-serialize-configuration config)) - #:environment-variables - ;; Required to detect PulseAudio when run under a user account. - (list (string-append - "XDG_RUNTIME_DIR=/run/user/" - (number->string - (passwd:uid - (getpwnam #$(mpd-configuration-user config)))))) - #:log-file #$(mpd-file-name config "log"))) - (stop #~(make-kill-destructor)))) - -(define (mpd-service-activation config) - (with-imported-modules '((guix build utils)) - #~(begin - (use-modules (guix build utils)) - (define %user - (getpw #$(mpd-configuration-user config))) - - (let ((directory #$(mpd-file-name config ".mpd"))) - (mkdir-p directory) - (chown directory (passwd:uid %user) (passwd:gid %user)) - - ;; Make /var/run/mpd/USER user-owned as well. - (chown (dirname directory) - (passwd:uid %user) (passwd:gid %user)))))) - - -(define %mpd-accounts - ;; Default account and group for MPD. - (list (user-group (name "mpd") (system? #t)) - (user-account - (name "mpd") - (group "mpd") - (system? #t) - (comment "Music Player Daemon (MPD) user") - - ;; Note: /var/run/mpd hosts one sub-directory per user, of which - ;; /var/run/mpd/mpd corresponds to the "mpd" user. - (home-directory "/var/run/mpd/mpd") - - (shell (file-append shadow "/sbin/nologin"))))) + (match-record config <mpd-configuration> (user package shepherd-requirement + log-file playlist-directory + db-file state-file sticker-file) + (let* ((config-file (mpd-serialize-configuration config))) + (shepherd-service + (documentation "Run the MPD (Music Player Daemon)") + (requirement `(user-processes loopback ,@shepherd-requirement)) + (provision '(mpd)) + (start #~(begin + (and=> #$(maybe-value log-file) + (compose mkdir-p dirname)) + + (let ((user (getpw #$user))) + (for-each + (lambda (x) + (when (and x (not (file-exists? x))) + (mkdir-p x) + (chown x (passwd:uid user) (passwd:gid user)))) + (list #$(maybe-value playlist-directory) + (and=> #$(maybe-value db-file) dirname) + (and=> #$(maybe-value state-file) dirname) + (and=> #$(maybe-value sticker-file) dirname)))) + + (make-forkexec-constructor + (list #$(file-append package "/bin/mpd") + "--no-daemon" + #$config-file) + #:environment-variables + ;; Required to detect PulseAudio when run under a user account. + (list (string-append + "XDG_RUNTIME_DIR=/run/user/" + (number->string (passwd:uid (getpwnam #$user)))))))) + (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) + (list (user-group + (name group) + (system? #t)) + (user-account + (name user) + (group 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-service-type (service-type @@ -237,7 +532,7 @@ By default this is a single output using pulseaudio.") (list (service-extension shepherd-root-service-type (compose list mpd-shepherd-service)) (service-extension account-service-type - (const %mpd-accounts)) - (service-extension activation-service-type - mpd-service-activation))) + mpd-accounts) + (service-extension rottlog-service-type + (compose list mpd-log-rotation)))) (default-value (mpd-configuration)))) |