[bug#58454] [PATCH 1/1] gnu: home: Add home-dbus-service-type.

[Andrew Tropin <andrew@trop.in>]

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Hi unmatched-paren!

Thank you for the patch, it looks good and I think can be merged in the
way it is right now, but I wrote a few minor notes/nitpicks below.

On 2022-10-11 20:54, "\( via Guix-patches" via wrote:

> * gnu/home/services/desktop.scm (home-dbus-service-type): New
>   variable.
> (home-dbus-configuration): New record type.
> * doc/guix.texi: Document them.
> ---
>  doc/guix.texi                 | 17 ++++++++++++
>  gnu/home/services/desktop.scm | 52 ++++++++++++++++++++++++++++++++++-
>  2 files changed, 68 insertions(+), 1 deletion(-)
>
> diff --git a/doc/guix.texi b/doc/guix.texi
> index 5867acb746..990113703b 100644
> --- a/doc/guix.texi
> +++ b/doc/guix.texi
> @@ -41262,6 +41262,23 @@ format.
>  
>  @end deftp
>  
> +@defvr {Scheme Variable} home-dbus-service-type
> +This is the service type for running a session-specific D-Bus, for
> +unprivileged applications that require D-Bus to be running.
> +@end defvr
> +
> +@deftp {Data Type} home-dbus-configuration
> +The configuration record for @code{home-dbus-service-type}.
> +
> +@table @asis
> +@item @code{dbus} (default: @code{dbus})
> +The package providing the @code{/bin/dbus-daemon} command.
> +
> +@item @code{verbose?} (default: @code{#f})
> +Whether to enable logging.
> +@end table
> +@end deftp
> +
>  @node Guix Home Services
>  @subsection Guix Home Services
>  
> diff --git a/gnu/home/services/desktop.scm b/gnu/home/services/desktop.scm
> index b0f4d969b0..4cf151762d 100644
> --- a/gnu/home/services/desktop.scm
> +++ b/gnu/home/services/desktop.scm
> @@ -1,5 +1,6 @@
>  ;;; GNU Guix --- Functional package management for GNU
>  ;;; Copyright © 2022 Ludovic Courtès <ludo@gnu.org>
> +;;; Copyright © 2022 ( <paren@disroot.org>
>  ;;;
>  ;;; This file is part of GNU Guix.
>  ;;;
> @@ -20,6 +21,7 @@ (define-module (gnu home services desktop)
>    #:use-module (gnu home services)
>    #:use-module (gnu home services shepherd)
>    #:use-module (gnu services configuration)
> +  #:autoload   (gnu packages glib)    (dbus)
>    #:autoload   (gnu packages xdisorg) (redshift)
>    #:use-module (guix records)
>    #:use-module (guix gexp)
> @@ -27,8 +29,10 @@ (define-module (gnu home services desktop)
>    #:use-module (ice-9 match)
>    #:export (home-redshift-configuration
>              home-redshift-configuration?
> +            home-redshift-service-type
>  
> -            home-redshift-service-type))
> +            home-dbus-configuration
> +            home-dbus-service-type))
>  
>  \f
>  ;;;
> @@ -172,3 +176,49 @@ (define home-redshift-service-type
>     (description
>      "Run Redshift, a program that adjusts the color temperature of display
>  according to time of day.")))
> +
> +\f
> +;;;
> +;;; D-Bus.
> +;;;
> +
> +(define-record-type* <home-dbus-configuration>
> +  home-dbus-configuration make-home-dbus-configuration
> +  home-dbus-configuration?
> +  (dbus home-dbus-dbus                  ;file-like
> +        (default dbus))
> +  (verbose? home-dbus-verbose?          ;boolean

Sounds a little missleading as it doesn't control the verbosity of
logging, but the logging as a whole.

Also, does logging to file work at all when --syslog-only option
provided?

> +            (default #f)))
> +
> +(define (home-dbus-shepherd-services config)
> +  (list (shepherd-service
> +         (documentation "Run the D-Bus daemon in session-specific mode.")
> +         (provision '(dbus-session))
> +         (start #~(make-forkexec-constructor
> +                   (list #$(file-append (home-dbus-dbus config)
> +                                        "/bin/dbus-daemon")
> +                         "--nofork" "--session" "--syslog-only"
> +                         (format #f "--address=unix:path=~a/bus"
> +                                 (or (getenv "XDG_RUNTIME_DIR")
> +                                     (format #f "/run/user/~a"
> +                                             (getuid)))))
> +                   #$@(if (home-dbus-verbose? config)
> +                          (list #:environment-variables
> +                                #~(list "DBUS_VERBOSE=1")
> +                                #:log-file
> +                                (format #f "~a/dbus-daemon.log"
> +                                        (or (getenv "XDG_LOG_HOME")
> +                                            (format #f "~a/.local/var/log"
> +                                                    (getenv "HOME")))))
> +                          '())))
> +         (stop #~(make-kill-destructor)))))
> +
> +(define home-dbus-service-type
> +  (service-type
> +   (name 'home-dbus)
> +   (extensions
> +    (list (service-extension home-shepherd-service-type
> +                             home-dbus-shepherd-services)))

Do we want to extend environment-variables with

--8<---------------cut here---------------start------------->8---
'(("DBUS_SESSION_BUS_ADDRESS" . "unix:path=$XDG_RUNTIME_DIR/bus"))
--8<---------------cut here---------------end--------------->8---

?

> +   (default-value (home-dbus-configuration))
> +   (description
> +    "Run the session-specific D-Bus inter-process message bus.")))

-- 
Best regards,
Andrew Tropin

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