nixpkgs/upstart-jobs/tty-backgrounds.nix

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{pkgs, config, ...}:
###### interface
let
inherit (pkgs.lib) mkOption mkIf;
options = {
services = {
ttyBackgrounds = {
enable = mkOption {
default = true;
description = "
Whether to enable graphical backgrounds for the virtual consoles.
";
};
defaultTheme = mkOption {
default = pkgs.fetchurl {
#url = http://www.bootsplash.de/files/themes/Theme-BabyTux.tar.bz2;
url = mirror://gentoo/distfiles/Theme-BabyTux.tar.bz2;
md5 = "a6d89d1c1cff3b6a08e2f526f2eab4e0";
};
description = "
The default theme for the virtual consoles. Themes can be found
at <link xlink:href='http://www.bootsplash.de/' />.
";
};
defaultSpecificThemes = mkOption {
default = [
/*
{ tty = 6;
theme = pkgs.fetchurl { # Yeah!
url = mirror://gentoo/distfiles/Theme-Pativo.tar.bz2;
md5 = "9e13beaaadf88d43a5293e7ab757d569";
};
}
*/
{ tty = 10;
theme = pkgs.themes "theme-gnu";
}
];
description = "
This option sets specific themes for virtual consoles. If you
just want to set themes for additional consoles, use
<option>services.ttyBackgrounds.specificThemes</option>.
";
};
specificThemes = mkOption {
default = [
];
description = "
This option allows you to set specific themes for virtual
consoles.
";
};
};
};
};
in
###### implementation
let
inherit (pkgs) stdenv;
kernelPackages = config.boot.kernelPackages;
splashutils = kernelPackages.splashutils;
requiredTTYs = config.requiredTTYs;
backgrounds =
let
specificThemes =
config.services.ttyBackgrounds.defaultSpecificThemes
++ config.services.ttyBackgrounds.specificThemes;
overridenTTYs = map (x: x.tty) specificThemes;
# Use the default theme for all the mingetty ttys and for the
# syslog tty, except those for which a specific theme is
# specified.
defaultTTYs =
pkgs.lib.filter (x: !(pkgs.lib.elem x overridenTTYs)) requiredTTYs;
in
(map (ttyNumber: {
tty = ttyNumber;
theme = config.services.ttyBackgrounds.defaultTheme;
}) defaultTTYs)
++ specificThemes;
themesUnpacked = stdenv.mkDerivation {
name = "splash-themes";
builder = ./tty-backgrounds-combine.sh;
# !!! Should use XML here.
ttys = map (x: x.tty) backgrounds;
themes = map (x: if x ? theme then (unpackTheme x.theme) else "default") backgrounds;
};
unpackTheme = theme: import ../helpers/unpack-theme.nix {
inherit stdenv theme;
};
in
mkIf (config.services.ttyBackgrounds.enable) {
assertions = [ { assertion = kernelPackages.splashutils != null; message = "kernelPackages.splashutils may not be false"; } ];
require = [
options
];
environment = {
etc = [
{ source = themesUnpacked;
target = "splash";
}
];
};
services = {
extraJobs = [ rec {
name = "tty-backgrounds";
job = ''
start on udev
start script
# Critical: tell the kernel where to find splash_helper. It calls
# this program every time we switch between consoles.
helperProcFile=${splashutils.helperProcFile}
if test -e /proc/sys/fbcondecor; then helperProcFile=/proc/sys/fbcondecor; fi
echo ${splashutils}/${splashutils.helperName} > $helperProcFile
# For each console...
for tty in ${toString (map (x: x.tty) backgrounds)}; do
# Make sure that the console exists.
echo -n "" > /dev/tty$tty
# Set the theme as determined by tty-backgrounds-combine.sh
# above.
theme=$(readlink ${themesUnpacked}/$tty)
${splashutils}/${splashutils.controlName} --tty $tty -c setcfg -t $theme || true
${splashutils}/${splashutils.controlName} --tty $tty -c setpic -t $theme || true
${splashutils}/${splashutils.controlName} --tty $tty -c on || true
done
end script
respawn sleep 10000 # !!! Hack
stop script
# Disable the theme on each console.
for tty in ${toString (map (x: x.tty) backgrounds)}; do
${splashutils}/${splashutils.controlName} --tty $tty -c off || true
done
end script
'';
}];
};
}