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services: xorg: Define an <xorg-configuration> record type. 

* gnu/services/xorg.scm (<xorg-configuration>): New record type.
(xorg-configuration-file): Remove.
(xorg-wrapper): Remove #:modules, #:configuration-file, and
 #:xorg-server; add optional 'config' parameter instead.  Adjust
accordingly.
(xorg-start-command): Likewise.
* doc/guix.texi (X Window): Document 'xorg-configuration'.  Update
'xorg-start-command' documentation.  Remove 'xorg-configuration-file'
documentation.
master
Ludovic Courtès 2019-03-18 22:56:13 +01:00
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130
doc/guix.texi
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@ -13352,98 +13352,52 @@ type @code{<sddm-configuration>}.
@end example
@end deffn
@deffn {Scheme Procedure} xorg-start-command @
[#:modules %default-xorg-modules] @
[#:fonts %default-xorg-fonts] @
[#:configuration-file (xorg-configuration-file @dots{})] @
[#:xorg-server @var{xorg-server}]
[#:xserver-arguments '("-nolisten" "tcp")]
Return a @code{startx} script in which @var{modules}, a list of X module
packages, and @var{fonts}, a list of X font directories, are available. See
@code{xorg-wrapper} for more details on the arguments. The result should be
used in place of @code{startx}.
@cindex Xorg, configuration
@deftp {Data Type} xorg-configuration
This data type represents the configuration of the Xorg graphical display
server. Note that there is not Xorg service; instead, the X server is started
by a ``display manager'' such as GDM, SDDM, and SLiM. Thus, the configuration
of these display managers aggregates an @code{xorg-configuration} record.
@table @asis
@item @code{modules} (default: @code{%default-xorg-modules})
This is a list of @dfn{module packages} loaded by the Xorg
server---e.g., @code{xf86-video-vesa}, @code{xf86-input-keyboard}, and so on.
@item @code{fonts} (default: @code{%default-xorg-fonts})
This is a list of font directories to add to the server's @dfn{font path}.
@item @code{drivers} (default: @code{'()})
This must be either the empty list, in which case Xorg chooses a graphics
driver automatically, or a list of driver names that will be tried in this
order---e.g., @code{("modesetting" "vesa")}.
@item @code{resolutions} (default: @code{'()})
When @code{resolutions} is the empty list, Xorg chooses an appropriate screen
resolution. Otherwise, it must be a list of resolutions---e.g., @code{((1024
768) (640 480))}.
@item @code{extra-config} (default: @code{'()})
This is a list of strings or objects appended to the configuration file. It
is used to pass extra text to be added verbatim to the configuration file.
@item @code{server} (default: @code{xorg-server})
This is the package providing the Xorg server.
@item @code{server-arguments} (default: @code{%default-xorg-server-arguments})
This is the list of command-line arguments to pass to the X server. The
default is @code{-nolisten tcp}.
@end table
@end deftp
@deffn {Scheme Procedure} xorg-start-command [@var{config}]
Return a @code{startx} script in which the modules, fonts, etc. specified
in @var{config}, are available. The result should be used in place of
@code{startx}.
Usually the X server is started by a login manager.
@end deffn
@cindex @code{-listen tcp}, for X11.
This procedure is useful to override command line options for the X server,
such as having it listen to over TCP:
@example
(operating-system
...
(services
(modify-services %desktop-services
(slim-service-type config =>
(slim-configuration
(inherit config)
(startx (xorg-start-command
#:xserver-arguments '("-listen" "tcp"))))))))
@end example
@deffn {Scheme Procedure} xorg-configuration-file @
[#:modules %default-xorg-modules] @
[#:fonts %default-xorg-fonts] @
[#:drivers '()] [#:resolutions '()] [#:extra-config '()]
Return a configuration file for the Xorg server containing search paths for
all the common drivers.
@var{modules} must be a list of @dfn{module packages} loaded by the Xorg
server---e.g., @code{xf86-video-vesa}, @code{xf86-input-keyboard}, and so on.
@var{fonts} must be a list of font directories to add to the server's
@dfn{font path}.
@var{drivers} must be either the empty list, in which case Xorg chooses a
graphics driver automatically, or a list of driver names that will be tried in
this order---e.g., @code{("modesetting" "vesa")}.
Likewise, when @var{resolutions} is the empty list, Xorg chooses an
appropriate screen resolution; otherwise, it must be a list of
resolutions---e.g., @code{((1024 768) (640 480))}.
Last, @var{extra-config} is a list of strings or objects appended to the
configuration file. It is used to pass extra text to be
added verbatim to the configuration file.
@cindex keymap
@cindex keyboard layout
This procedure is especially useful to configure a different keyboard layout
than the default US keymap. For instance, to use the ``bépo'' keymap by
default on the display manager:
@example
(define bepo-evdev
"Section \"InputClass\"
Identifier \"evdev keyboard catchall\"
Driver \"evdev\"
MatchIsKeyboard \"on\"
Option \"xkb_layout\" \"fr\"
Option \"xkb_variant\" \"bepo\"
EndSection")
(operating-system
...
(services
(modify-services %desktop-services
(slim-service-type config =>
(slim-configuration
(inherit config)
(startx (xorg-start-command
#:configuration-file
(xorg-configuration-file
#:extra-config
(list bepo-evdev)))))))))
@end example
The @code{MatchIsKeyboard} line specifies that we only apply the configuration
to keyboards. Without this line, other devices such as touchpad may not work
correctly because they will be attached to the wrong driver. In this example,
the user typically used @code{setxkbmap fr bepo} to set their favorite keymap
once logged in. The first argument corresponds to the layout, while the second
argument corresponds to the variant. The @code{xkb_variant} line can be omitted
to select the default variant.
@end deffn
@deffn {Scheme Procedure} screen-locker-service @var{package} [@var{program}]
Add @var{package}, a package for a screen locker or screen saver whose

115
gnu/services/xorg.scm
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@ -48,7 +48,16 @@
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-26)
#:use-module (ice-9 match)
#:export (xorg-configuration-file
#:export (xorg-configuration
xorg-configuration?
xorg-configuration-modules
xorg-configuration-fonts
xorg-configuration-drivers
xorg-configuration-resolutions
xorg-configuration-extra-config
xorg-configuration-server
xorg-configuration-server-arguments
%default-xorg-modules
%default-xorg-fonts
xorg-wrapper
@ -122,33 +131,36 @@
"/share/fonts/X11/misc")
(file-append font-adobe75dpi "/share/fonts/X11/75dpi")))
(define* (xorg-configuration-file #:key
(modules %default-xorg-modules)
(fonts %default-xorg-fonts)
(drivers '()) (resolutions '())
(extra-config '()))
"Return a configuration file for the Xorg server containing search paths for
all the common drivers.
(define %default-xorg-server-arguments
;; Default command-line arguments for X.
'("-nolisten" "tcp"))
@var{modules} must be a list of @dfn{module packages} loaded by the Xorg
server---e.g., @code{xf86-video-vesa}, @code{xf86-input-keyboard}, and so on.
@var{fonts} must be a list of font directories to add to the server's
@dfn{font path}.
;; Configuration of an Xorg server.
(define-record-type* <xorg-configuration>
xorg-configuration make-xorg-configuration
xorg-configuration?
(modules xorg-configuration-modules ;list of packages
(default %default-xorg-modules))
(fonts xorg-configuration-fonts ;list of packges
(default %default-xorg-fonts))
(drivers xorg-configuration-drivers ;list of strings
(default '()))
(resolutions xorg-configuration-resolutions ;list of tuples
(default '()))
(extra-config xorg-configuration-extra-config ;list of strings
(default '()))
(server xorg-configuration-server ;package
(default xorg-server))
(server-arguments xorg-configuration-server-arguments ;list of strings
(default %default-xorg-server-arguments)))
@var{drivers} must be either the empty list, in which case Xorg chooses a
graphics driver automatically, or a list of driver names that will be tried in
this order---e.g., @code{(\"modesetting\" \"vesa\")}.
Likewise, when @var{resolutions} is the empty list, Xorg chooses an
appropriate screen resolution; otherwise, it must be a list of
resolutions---e.g., @code{((1024 768) (640 480))}.
Last, @var{extra-config} is a list of strings or objects appended to the
configuration file. It is used to pass extra text to be
added verbatim to the configuration file."
(define (xorg-configuration->file config)
"Compute an Xorg configuration file corresponding to CONFIG, an
<xorg-configuration> record."
(define all-modules
;; 'xorg-server' provides 'fbdevhw.so' etc.
(append modules (list xorg-server)))
(append (xorg-configuration-modules config)
(list xorg-server)))
(define build
#~(begin
@ -159,7 +171,7 @@ added verbatim to the configuration file."
(call-with-output-file #$output
(lambda (port)
(define drivers
'#$drivers)
'#$(xorg-configuration-drivers config))
(define (device-section driver)
(string-append "
@ -201,7 +213,7 @@ EndSection"))
(display "Section \"Files\"\n" port)
(for-each (lambda (font)
(format port " FontPath \"~a\"~%" font))
'#$fonts)
'#$(xorg-configuration-fonts config))
(for-each (lambda (module)
(format port
" ModulePath \"~a\"~%"
@ -221,7 +233,8 @@ EndSection\n" port)
port)
(newline port)
(display (string-join
(map (cut screen-section <> '#$resolutions)
(map (cut screen-section <>
'#$(xorg-configuration-resolutions config))
drivers)
"\n")
port)
@ -229,11 +242,10 @@ EndSection\n" port)
(for-each (lambda (config)
(display config port))
'#$extra-config)))))
'#$(xorg-configuration-extra-config config))))))
(computed-file "xserver.conf" build))
(define (xorg-configuration-directory modules)
"Return a directory that contains the @code{.conf} files for X.org that
includes the @code{share/X11/xorg.conf.d} directories of each package listed
@ -260,51 +272,38 @@ in @var{modules}."
files)
#t))))
(define* (xorg-wrapper #:key
(modules %default-xorg-modules)
(configuration-file (xorg-configuration-file
#:modules modules))
(xorg-server xorg-server))
"Return a derivation that builds a @var{guile} script to start the X server
from @var{xorg-server}. @var{configuration-file} is the server configuration
file or a derivation that builds it; when omitted, the result of
@code{xorg-configuration-file} is used. The resulting script should be used
in place of @code{/usr/bin/X}."
(define* (xorg-wrapper #:optional (config (xorg-configuration)))
"Return a derivation that builds a script to start the X server with the
given @var{config}. The resulting script should be used in place of
@code{/usr/bin/X}."
(define exp
;; Write a small wrapper around the X server.
#~(begin
(setenv "XORG_DRI_DRIVER_PATH" (string-append #$mesa "/lib/dri"))
(setenv "XKB_BINDIR" (string-append #$xkbcomp "/bin"))
(let ((X (string-append #$xorg-server "/bin/X")))
(let ((X (string-append #$(xorg-configuration-server config) "/bin/X")))
(apply execl X X
"-xkbdir" (string-append #$xkeyboard-config "/share/X11/xkb")
"-config" #$configuration-file
"-configdir" #$(xorg-configuration-directory modules)
"-config" #$(xorg-configuration->file config)
"-configdir" #$(xorg-configuration-directory
(xorg-configuration-modules config))
(cdr (command-line))))))
(program-file "X-wrapper" exp))
(define* (xorg-start-command #:key
(modules %default-xorg-modules)
(fonts %default-xorg-fonts)
(configuration-file
(xorg-configuration-file #:modules modules
#:fonts fonts))
(xorg-server xorg-server)
(xserver-arguments '("-nolisten" "tcp")))
"Return a @code{startx} script in which @var{modules}, a list of X module
packages, and @var{fonts}, a list of X font directories, are available. See
@code{xorg-wrapper} for more details on the arguments. The result should be
used in place of @code{startx}."
(define* (xorg-start-command #:optional (config (xorg-configuration)))
"Return a @code{startx} script in which the modules, fonts, etc. specified
in @var{config}, are available. The result should be used in place of
@code{startx}."
(define X
(xorg-wrapper #:configuration-file configuration-file
#:modules modules
#:xorg-server xorg-server))
(xorg-wrapper config))
(define exp
;; Write a small wrapper around the X server.
#~(apply execl #$X #$X ;; Second #$X is for argv[0].
"-logverbose" "-verbose" "-terminate" #$@xserver-arguments
"-logverbose" "-verbose" "-terminate"
#$@(xorg-configuration-server-arguments config)
(cdr (command-line))))
(program-file "startx" exp))