nixpkgs/nixos/modules/config/i18n.nix
pennae 3aebb4a2be nixos/*: normalize link format
make (almost) all links appear on only a single line, with no
unnecessary whitespace, using double quotes for attributes. this lets us
automatically convert them to markdown easily.

the few remaining links are extremely long link in a gnome module, we'll
come back to those at a later date.
2022-08-03 21:57:46 +02:00

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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;
};
defaultText = literalExpression ''
pkgs.buildPackages.glibcLocales.override {
allLocales = any (x: x == "all") config.i18n.supportedLocales;
locales = config.i18n.supportedLocales;
}
'';
example = literalExpression "pkgs.glibcLocales";
description = lib.mdDoc ''
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 = lib.mdDoc ''
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 = lib.mdDoc ''
A set of additional system-wide locale settings other than
`LANG` which can be configured with
{option}`i18n.defaultLocale`.
'';
};
supportedLocales = mkOption {
type = types.listOf types.str;
default = unique
(builtins.map (l: (replaceStrings [ "utf8" "utf-8" "UTF8" ] [ "UTF-8" "UTF-8" "UTF-8" ] l) + "/UTF-8") (
[
"C.UTF-8"
"en_US.UTF-8"
config.i18n.defaultLocale
] ++ (attrValues (filterAttrs (n: v: n != "LANGUAGE") config.i18n.extraLocaleSettings))
));
defaultText = literalExpression ''
unique
(builtins.map (l: (replaceStrings [ "utf8" "utf-8" "UTF8" ] [ "UTF-8" "UTF-8" "UTF-8" ] l) + "/UTF-8") (
[
"C.UTF-8"
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
<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"/>.
'';
};
};
};
###### 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)}
'';
};
}