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services: mpd: Use proper records for user and group fields.

Deprecate using strings for these fields and prefer user-account
(resp. user-group) instead to avoid duplication within account-service-type.

Fixes #61570 <https://issues.guix.gnu.org/61570>.

* gnu/services/audio.scm (%mpd-user, %mpd-group)
(mpd-serialize-user-account, mpd-serialize-user-group)
(mpd-user-sanitizer, mpd-group-sanitizer): New variables.
(mpd-configuration)[user]: Use user-account as value type.
Sanitize via mpd-user-sanitizer.
[group]: Use user-group as value type.
Sanitize via mpd-group-sanitizer.
(mpd-shepherd-service): Adjust accordingly.
(mpd-accounts): Likewise.
* doc/guix.texi (Audio Services)[Music Player Daemon]: Likewise.

Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>
master
Bruno Victal 2023-03-26 19:41:32 +01:00 committed by Liliana Marie Prikler
parent 2c4df1a41a
commit 7fdadeac11
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GPG Key ID: 442A84B8C70E2F87
2 changed files with 86 additions and 30 deletions

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@ -6211,7 +6211,7 @@ Transformation Options}) so it should be lossless.
@item --profile=@var{profile}
@itemx -p @var{profile}
Create an environment containing the packages installed in @var{profile}.
Create an environment containing the packages installed in @var{profile}.
Use @command{guix package} (@pxref{Invoking guix package}) to create
and manage profiles.
@ -6657,7 +6657,7 @@ interpreted as packages that will be added to the environment directly.
@item --profile=@var{profile}
@itemx -p @var{profile}
Create an environment containing the packages installed in @var{profile}.
Create an environment containing the packages installed in @var{profile}.
Use @command{guix package} (@pxref{Invoking guix package}) to create
and manage profiles.
@ -12667,7 +12667,7 @@ candidates, and even to test their impact on packages that depend on
them:
@example
guix build elogind --with-source=@dots{}/shepherd-0.9.0rc1.tar.gz
guix build elogind --with-source=@dots{}/shepherd-0.9.0rc1.tar.gz
@end example
@dots{} or to build from a checkout in a pristine environment:
@ -23783,7 +23783,7 @@ created for.
Restricts all controllers to the specified transport. @code{'dual} means both
BR/EDR and LE are enabled (if supported by the hardware).
Possible values are:
Possible values are:
@itemize @bullet
@item
@ -33494,14 +33494,17 @@ Data type representing the configuration of @command{mpd}.
@item @code{package} (default: @code{mpd}) (type: file-like)
The MPD package.
@item @code{user} (default: @code{"mpd"}) (type: string)
@item @code{user} (default: @code{%mpd-user}) (type: user-account)
The user to run mpd as.
@item @code{group} (default: @code{"mpd"}) (type: string)
The default @code{%mpd-user} is a system user with the name ``mpd'',
who is a part of the group @var{group} (see below).
@item @code{group} (default: @code{%mpd-group}) (type: user-group)
The group to run mpd as.
The default @code{%mpd-group} is a system group with name ``mpd''.
@item @code{shepherd-requirement} (default: @code{()}) (type: list-of-symbol)
This is a list of symbols naming Shepherd services that this service
A list of symbols naming Shepherd services that this service
will depend on.
@item @code{environment-variables} (default: @code{("PULSE_CLIENTCONFIG=/etc/pulse/client.conf" "PULSE_CONFIG=/etc/pulse/daemon.conf")}) (type: list-of-strings)
@ -41215,7 +41218,7 @@ A clause can have one of the following forms:
(@var{field-name}
(@var{type} @var{default-value})
@var{documentation})
(@var{field-name}
(@var{type} @var{default-value})
@var{documentation}
@ -41289,7 +41292,7 @@ A simple serializer procedure could look like this:
(define (serialize-boolean field-name value)
(let ((value (if value "true" "false")))
#~(string-append #$field-name #$value)))
@end lisp
@end lisp
In some cases multiple different configuration records might be defined
in the same file, but their serializers for the same type might have to
@ -41307,7 +41310,7 @@ manually specify a custom @var{serializer} for every field.
(define (bar-serialize-string field-name value)
@dots{})
(define-configuration foo-configuration
(label
(string)
@ -41339,7 +41342,7 @@ macro which is a shorthand of this.
(field
(string "test")
"Some documentation."))
@end lisp
@end lisp
@end defmac
@defmac define-maybe type
@ -44145,7 +44148,7 @@ down in its dependency graph. As it turns out, GLib does not have a
from /gnu/store/@dots{}-glib-2.62.6/lib/libglib-2.0.so.0
#1 0x00007ffff608a7d6 in gobject_init_ctor ()
from /gnu/store/@dots{}-glib-2.62.6/lib/libgobject-2.0.so.0
#2 0x00007ffff7fe275a in call_init (l=<optimized out>, argc=argc@@entry=1, argv=argv@@entry=0x7fffffffcfd8,
#2 0x00007ffff7fe275a in call_init (l=<optimized out>, argc=argc@@entry=1, argv=argv@@entry=0x7fffffffcfd8,
env=env@@entry=0x7fffffffcfe8) at dl-init.c:72
#3 0x00007ffff7fe2866 in call_init (env=0x7fffffffcfe8, argv=0x7fffffffcfd8, argc=1, l=<optimized out>)
at dl-init.c:118
@ -44174,7 +44177,7 @@ Starting program: /gnu/store/@dots{}-profile/bin/sh -c exec\ inkscape
#0 g_getenv (variable=variable@@entry=0x7ffff60c7a2e "GOBJECT_DEBUG") at ../glib-2.62.6/glib/genviron.c:252
#1 0x00007ffff608a7d6 in gobject_init () at ../glib-2.62.6/gobject/gtype.c:4380
#2 gobject_init_ctor () at ../glib-2.62.6/gobject/gtype.c:4493
#3 0x00007ffff7fe275a in call_init (l=<optimized out>, argc=argc@@entry=3, argv=argv@@entry=0x7fffffffd088,
#3 0x00007ffff7fe275a in call_init (l=<optimized out>, argc=argc@@entry=3, argv=argv@@entry=0x7fffffffd088,
env=env@@entry=0x7fffffffd0a8) at dl-init.c:72
@dots{}
@end example

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@ -140,6 +140,14 @@
(define list-of-symbol?
(list-of symbol?))
;; 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
@ -164,10 +172,31 @@
(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")
(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)
@ -197,6 +226,33 @@
(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)
;; XXX: This is to be lazily substituted in (…-accounts)
;; with the value from 'group'.
(group %lazy-group)))
(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))))
;;;
;; Generic MPD plugin record, lists only the most prevalent fields.
@ -347,12 +403,14 @@ to be appended to the audio output configuration.")
empty-serializer)
(user
(string "mpd")
"The user to run mpd as.")
(user-account %mpd-user)
"The user to run mpd as."
(sanitizer mpd-user-sanitizer))
(group
(string "mpd")
"The group to run mpd as.")
(user-group %mpd-group)
"The group to run mpd as."
(sanitizer mpd-group-sanitizer))
(shepherd-requirement
(list-of-symbol '())
@ -517,7 +575,8 @@ appended to the configuration.")
log-file playlist-directory
db-file state-file sticker-file
environment-variables)
(let* ((config-file (mpd-serialize-configuration config)))
(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 ,@shepherd-requirement))
@ -526,7 +585,7 @@ appended to the configuration.")
(and=> #$(maybe-value log-file)
(compose mkdir-p dirname))
(let ((user (getpw #$user)))
(let ((user (getpw #$username)))
(for-each
(lambda (x)
(when (and x (not (file-exists? x)))
@ -560,17 +619,11 @@ appended to the configuration.")
(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"))))))
;; 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