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Subject: [bug#66932] [PATCH] services: Add xremap service.
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* gnu/services/desktop.scm (<xremap-configuration>): New record.
(xremap-shepherd-service): New procedure.
(xremap-service-type): New variable.
* doc/guix.texi (Desktop Services): Document this.

Change-Id: I76f9e238c72fb47226140e2b86dd9490cd9c9351
---
 doc/guix.texi            | 37 ++++++++++++++++++++++++++++++++++++
 gnu/services/desktop.scm | 41 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)

diff --git a/doc/guix.texi b/doc/guix.texi
index b90078be06..e61b4e2650 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -119,6 +119,7 @@
 Copyright @copyright{} 2023 Zheng Junjie@*
 Copyright @copyright{} 2023 Brian Cully@*
 Copyright @copyright{} 2023 Felix Lechner@*
+Copyright @copyright{} 2023 VÖRÖSKŐI András@*
 
 Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.3 or
@@ -25011,6 +25012,42 @@ Desktop Services
 @end table
 @end deftp
 
+@defvar xremap-service-type
+@uref{https://github.com/k0kubun/xremap/, xremap} xremap is a key remapper for
+Linux. Unlike xmodmap, it supports app-specific remapping and Wayland.
+
+@lisp
+(append
+  (list
+   (service xremap-service-type
+                    (xremap-configuration
+                     (config-file (plain-file "xremap.yml"
+"modmap:
+  - name: Global
+    remap:
+      CAPSLOCK:
+        held: CONTROL_L
+        alone: Esc
+        alone_timeout_millis: 1000"))))
+
+  ;; normally one would want %base-services
+  %base-services)
+
+@end lisp
+@end defvar
+
+@deftp {Data Type} xremap-configuration
+Configuration record for the xremap daemon service.
+
+@table @asis
+@item @code{package} (default: @code{rust-xremap})
+The xremap package to use.
+
+@item @code{config-file} (default: @samp{(plain-file "xremap.yml" "")})
+Config file to use with xremap.
+
+@end table
+@end deftp
 
 @node Sound Services
 @subsection Sound Services
diff --git a/gnu/services/desktop.scm b/gnu/services/desktop.scm
index 5b79fbcda1..1cfa7c2169 100644
--- a/gnu/services/desktop.scm
+++ b/gnu/services/desktop.scm
@@ -17,6 +17,7 @@
 ;;; Copyright © 2021, 2022 muradm <mail@HIDDEN>
 ;;; Copyright © 2023 Bruno Victal <mirai@HIDDEN>
 ;;; Copyright © 2023 Zheng Junjie <873216071@HIDDEN>
+;;; Copyright © 2023 VÖRÖSKŐI András <voroskoi@HIDDEN>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -72,6 +73,7 @@ (define-module (gnu services desktop)
   #:use-module (gnu packages mate)
   #:use-module (gnu packages nfs)
   #:use-module (gnu packages enlightenment)
+  #:use-module (gnu packages rust-apps)
   #:use-module (guix deprecation)
   #:use-module (guix records)
   #:use-module (guix packages)
@@ -184,6 +186,9 @@ (define-module (gnu services desktop)
             seatd-configuration
             seatd-service-type
 
+	    xremap-configuration
+	    xremap-service-type
+
             %desktop-services))
 
 ;;; Commentary:
@@ -1863,6 +1868,42 @@ (define seatd-service-type
      (service-extension shepherd-root-service-type seatd-shepherd-service)))
    (default-value (seatd-configuration))))
 
+;;;
+;;; xremap
+;;;
+
+(define-record-type* <xremap-configuration>
+  xremap-configuration make-xremap-configuration
+  xremap-configuration?
+  (package xremap-configuration-package
+           (default rust-xremap))
+  (config-file xremap-configuration-config-file
+           (default (plain-file "xremap.yml" ""))))
+
+(define (xremap-shepherd-service config)
+  "Return an <sheperd-service> for xremap with CONFIG"
+  (match-record config <xremap-configuration>
+                (package config-file)
+                (list
+                (shepherd-service
+                 (provision '(xremap))
+                 (documentation "xremap daemon")
+                 (requirement '())
+                 (start #~(make-forkexec-constructor
+                           (list #$(file-append package "/bin/xremap")
+                                 #$config-file)))
+                 (stop #~(make-kill-destructor))))))
+
+(define xremap-service-type
+  (service-type
+   (name 'xremap)
+   (extensions
+    (list
+     (service-extension shepherd-root-service-type
+                        xremap-shepherd-service)))
+   (default-value (xremap-configuration))
+   (description "Run the @code{xremap} utility to modify keymaps system wide.")))
+
 
 ;;;
 ;;; The default set of desktop services.

base-commit: 9dcd8802f5bc472579f23a38dcf437f8a9ac976c
-- 
2.41.0

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Subject: bug#66932: Acknowledgement ([PATCH] services: Add xremap service.)
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Subject: [bug#66932] [PATCH] services: Add xremap service.
Resent-From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
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Date: Sat, 02 Dec 2023 11:48:30 +0100
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Hi Andr=C3=A1s,

V=C3=96R=C3=96SK=C5=90I Andr=C3=A1s <voroskoi@HIDDEN> skribis:

> * gnu/services/desktop.scm (<xremap-configuration>): New record.
> (xremap-shepherd-service): New procedure.
> (xremap-service-type): New variable.
> * doc/guix.texi (Desktop Services): Document this.
>
> Change-Id: I76f9e238c72fb47226140e2b86dd9490cd9c9351

Nice!

> +(append
> +  (list
> +   (service xremap-service-type
> +                    (xremap-configuration
> +                     (config-file (plain-file "xremap.yml"
> +"modmap:
> +  - name: Global
> +    remap:
> +      CAPSLOCK:
> +        held: CONTROL_L
> +        alone: Esc
> +        alone_timeout_millis: 1000"))))

Did you consider writing =E2=80=9Cbindings=E2=80=9D so that one can configu=
re it Scheme,
as is the case for most other services?  (To be clear, I think we should
still allow people to provide their own Yaml file as is done here.)

If that=E2=80=99s too tricky/impractical, we can keep the patch as is, but
adding =E2=80=9Cnative=E2=80=9D configuration on top of that would be sweet.

I wonder if it would make sense, in a future patch, to also provide
=E2=80=98home-xremap-service-type=E2=80=99 as a direct mapping of this serv=
ice.  Food
for thought.

Thanks,
Ludo=E2=80=99.

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Hi Ludo,

Thanks for the reply.

On Sat Dec 2, 2023 at 11:48 AM CET, Ludovic Court=C3=A8s wrote:
> Hi Andr=C3=A1s,
>
> Did you consider writing =E2=80=9Cbindings=E2=80=9D so that one can confi=
gure it Scheme,
> as is the case for most other services?  (To be clear, I think we should
> still allow people to provide their own Yaml file as is done here.)

I did consider that, but I am not familiar with guile, so that is too
hard for me and there are a lot of combinations to handle.

> If that=E2=80=99s too tricky/impractical, we can keep the patch as is, bu=
t
> adding =E2=80=9Cnative=E2=80=9D configuration on top of that would be swe=
et.

It is tricky for me and telling the truth I do not see the benefit.

> I wonder if it would make sense, in a future patch, to also provide
> =E2=80=98home-xremap-service-type=E2=80=99 as a direct mapping of this se=
rvice.  Food
> for thought.

I was thinking about that, but was not sure. There is a section in the READ=
ME about that:
https://github.com/k0kubun/xremap#running-xremap-without-sudo

The basic idea is creating an input group with write permission for every
input type.
I think we can not automate the "add user to input group" in the home-servi=
ce,
so that would be still a manual task.

Is this solution acceptable?

Thanks,
Andr=C3=A1s

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Hello!

Looks like this got a little lost, but would love to have an xremap
service (I have a config I found which gives me nice emacs keys
everywhere).

On Mon, Dec 04, 2023 at 06:43 PM, V=C3=96R=C3=96SK=C5=90I Andr=C3=A1s wrote=
:

> Hi Ludo,
>
> Thanks for the reply.
>
> On Sat Dec 2, 2023 at 11:48 AM CET, Ludovic Court=C3=A8s wrote:
>> Hi Andr=C3=A1s,
>>
>> Did you consider writing =E2=80=9Cbindings=E2=80=9D so that one can conf=
igure it Scheme,
>> as is the case for most other services?  (To be clear, I think we should
>> still allow people to provide their own Yaml file as is done here.)
>
> I did consider that, but I am not familiar with guile, so that is too
> hard for me and there are a lot of combinations to handle.
>
>> If that=E2=80=99s too tricky/impractical, we can keep the patch as is, b=
ut
>> adding =E2=80=9Cnative=E2=80=9D configuration on top of that would be sw=
eet.
>
> It is tricky for me and telling the truth I do not see the benefit.
>

From what I saw when I first looked at xremap, there's quite a lot of
syntax and possibilities. I guess the simplest thing is just something
that produces yaml from s-expressions without much logic, but maybe that
doesn't gain us much.

In any event, would like to have this as a starting point.

Ludo=E2=80=99: had you reviewed this at all do you remember, besides the
comment/suggestion above?

>> I wonder if it would make sense, in a future patch, to also provide
>> =E2=80=98home-xremap-service-type=E2=80=99 as a direct mapping of this s=
ervice.  Food
>> for thought.
>
> I was thinking about that, but was not sure. There is a section in the RE=
ADME about that:
> https://github.com/k0kubun/xremap#running-xremap-without-sudo
>
> The basic idea is creating an input group with write permission for every
> input type.
> I think we can not automate the "add user to input group" in the home-ser=
vice,
> so that would be still a manual task.
>
> Is this solution acceptable?
>

I don't know how this might work, sorry. It did seem more complicated to
do this without root, I believe by design of how such input grabbing
works (as one would hope, for security). A home service would indeed be
ideal, along with configuring as noted above, but I think both are quite
a bit more work.

> Thanks,
> Andr=C3=A1s

Thanks for the patch, I haven't tried it but maybe I can just take the
actual service part and slap it in my config...

John

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