{ 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;
};
defaultText = literalExpression ''
pkgs.buildPackages.glibcLocales.override {
allLocales = any (x: x == "all") config.i18n.supportedLocales;
locales = config.i18n.supportedLocales;
}
'';
example = literalExpression "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
LANG which can be configured with
.
'';
};
supportedLocales = mkOption {
type = types.listOf types.str;
default = builtins.map (l: l + "/UTF-8")
(unique (
[ config.i18n.defaultLocale ] ++
(attrValues (filterAttrs (n: v: n != "LANGUAGE") config.i18n.extraLocaleSettings))
));
defaultText = literalExpression ''
builtins.map (l: l + "/UTF-8")
(unique (
[ config.i18n.defaultLocale ] ++
(attrValues (filterAttrs (n: v: n != "LANGUAGE") config.i18n.extraLocaleSettings))
))
'';
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
"all" means that all locales supported by
Glibc will be installed. A full list of supported locales
can be found at .
'';
};
};
};
###### implementation
config = {
environment.systemPackages =
# We increase the priority a little, so that plain glibc in systemPackages can't win.
optional (config.i18n.supportedLocales != []) (lib.setPrio (-1) 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 = "${config.i18n.glibcLocales}/lib/locale/locale-archive";
};
# ‘/etc/locale.conf’ is used by systemd.
environment.etc."locale.conf".source = pkgs.writeText "locale.conf"
''
LANG=${config.i18n.defaultLocale}
${concatStringsSep "\n" (mapAttrsToList (n: v: "${n}=${v}") config.i18n.extraLocaleSettings)}
'';
};
}