nixpkgs/nixos/modules/config/i18n.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

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{ config, lib, pkgs, ... }:
with lib;
let
glibcLocales = pkgs.glibcLocales.override {
allLocales = any (x: x == "all") config.i18n.supportedLocales;
locales = config.i18n.supportedLocales;
};
in
{
###### interface
options = {
i18n = {
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.
'';
};
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="http://sourceware.org/cgi-bin/cvsweb.cgi/libc/localedata/SUPPORTED?cvsroot=glibc"/>.
'';
};
consoleFont = mkOption {
type = types.str;
default = "lat9w-16";
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.
'';
};
consoleKeyMap = mkOption {
type = mkOptionType {
name = "string or path";
check = t: (isString t || types.path.check t);
};
default = "us";
example = "fr";
description = ''
The keyboard mapping table for the virtual consoles.
'';
};
};
};
###### implementation
config = {
environment.systemPackages = [ glibcLocales ];
environment.variables.LANG = config.i18n.defaultLocale;
# /etc/locale.conf is used by systemd.
environment.etc = singleton
{ target = "locale.conf";
source = pkgs.writeText "locale.conf"
''
LANG=${config.i18n.defaultLocale}
'';
};
};
}