nixpkgs/nixos/modules/config/i18n.nix

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{ config, lib, pkgs, ... }:
with lib;
{
###### interface
options = {
i18n = {
glibcLocales = mkOption {
type = types.path;
default = pkgs.buildPackages.glibcLocales.override {
allLocales = any (x: x == "all") config.i18n.supportedLocales;
locales = config.i18n.supportedLocales;
};
example = literalExample "pkgs.glibcLocales";
description = ''
Customized pkg.glibcLocales package.
Changing this option can disable handling of i18n.defaultLocale
and supportedLocale.
'';
};
defaultLocale = mkOption {
type = types.str;
default = "en_US.UTF-8";
example = "nl_NL.UTF-8";
description = ''
The default locale. It determines the language for program
messages, the format for dates and times, sort order, and so on.
It also determines the character set, such as UTF-8.
'';
};
extraLocaleSettings = mkOption {
type = types.attrsOf types.str;
default = {};
example = { LC_MESSAGES = "en_US.UTF-8"; LC_TIME = "de_DE.UTF-8"; };
description = ''
A set of additional system-wide locale settings other than
<literal>LANG</literal> which can be configured with
<option>i18n.defaultLocale</option>.
'';
};
supportedLocales = mkOption {
type = types.listOf types.str;
default = ["all"];
example = ["en_US.UTF-8/UTF-8" "nl_NL.UTF-8/UTF-8" "nl_NL/ISO-8859-1"];
description = ''
List of locales that the system should support. The value
<literal>"all"</literal> means that all locales supported by
Glibc will be installed. A full list of supported locales
can be found at <link
xlink:href="https://sourceware.org/git/?p=glibc.git;a=blob;f=localedata/SUPPORTED"/>.
'';
};
consolePackages = mkOption {
type = types.listOf types.package;
default = with pkgs.kbdKeymaps; [ dvp neo ];
defaultText = ''with pkgs.kbdKeymaps; [ dvp neo ]'';
description = ''
List of additional packages that provide console fonts, keymaps and
other resources.
'';
};
consoleFont = mkOption {
type = types.str;
default = "Lat2-Terminus16";
example = "LatArCyrHeb-16";
description = ''
The font used for the virtual consoles. Leave empty to use
whatever the <command>setfont</command> program considers the
default font.
'';
};
consoleUseXkbConfig = mkOption {
type = types.bool;
default = false;
description = ''
If set, configure the console keymap from the xserver keyboard
settings.
'';
};
consoleKeyMap = mkOption {
type = with types; either str path;
default = "us";
example = "fr";
description = ''
The keyboard mapping table for the virtual consoles.
'';
};
consoleColors = mkOption {
type = types.listOf types.str;
default = [];
example = [
"002b36" "dc322f" "859900" "b58900"
"268bd2" "d33682" "2aa198" "eee8d5"
"002b36" "cb4b16" "586e75" "657b83"
"839496" "6c71c4" "93a1a1" "fdf6e3"
];
description = ''
The 16 colors palette used by the virtual consoles.
Leave empty to use the default colors.
Colors must be in hexadecimal format and listed in
order from color 0 to color 15.
'';
};
};
};
###### implementation
config = {
i18n.consoleKeyMap = with config.services.xserver;
mkIf config.i18n.consoleUseXkbConfig
(pkgs.runCommand "xkb-console-keymap" { preferLocalBuild = true; } ''
'${pkgs.ckbcomp}/bin/ckbcomp' -model '${xkbModel}' -layout '${layout}' \
-option '${xkbOptions}' -variant '${xkbVariant}' > "$out"
'');
environment.systemPackages =
optional (config.i18n.supportedLocales != []) config.i18n.glibcLocales;
environment.sessionVariables =
{ LANG = config.i18n.defaultLocale;
LOCALE_ARCHIVE = "/run/current-system/sw/lib/locale/locale-archive";
} // config.i18n.extraLocaleSettings;
systemd.globalEnvironment = mkIf (config.i18n.supportedLocales != []) {
LOCALE_ARCHIVE = "${config.i18n.glibcLocales}/lib/locale/locale-archive";
};
# /etc/locale.conf is used by systemd.
environment.etc = singleton
{ target = "locale.conf";
source = pkgs.writeText "locale.conf"
''
LANG=${config.i18n.defaultLocale}
${concatStringsSep "\n" (mapAttrsToList (n: v: ''${n}=${v}'') config.i18n.extraLocaleSettings)}
'';
};
};
}