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i18n: Use glibcLocales from NixOS if possible (#2333) (#4177)

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This will reduce the system closure size by about 200MB under NixOS by
sharing the glibcLocales package.

When home-manager is installed on Linux without the NixOS module, all
glibc locales are installed, as before.

Resolves: #2333
This commit is contained in:
Rodney Lorrimar
2023-07-04 19:28:25 +10:00
committed by GitHub
parent c24deeca64
commit 3be2abb2e6
6 changed files with 58 additions and 7 deletions
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32
modules/config/i18n.nix
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@@ -15,15 +15,16 @@
# below for changes:
# https://github.com/NixOS/nixpkgs/blob/nixpkgs-unstable/pkgs/development/libraries/glibc/nix-locale-archive.patch
{ lib, pkgs, ... }:
{ lib, pkgs, config, ... }:
with lib;
let
inherit (config.i18n) glibcLocales;
inherit (pkgs.glibcLocales) version;
inherit (glibcLocales) version;
archivePath = "${pkgs.glibcLocales}/lib/locale/locale-archive";
archivePath = "${glibcLocales}/lib/locale/locale-archive";
# lookup the version of glibcLocales and set the appropriate environment vars
localeVars = if versionAtLeast version "2.27" then {
@@ -36,6 +37,31 @@ let
in {
meta.maintainers = with maintainers; [ midchildan ];
options = {
i18n.glibcLocales = mkOption {
type = types.path;
description = ''
Customized <literal>glibcLocales</literal> package providing
the <literal>LOCALE_ARCHIVE_*</literal> environment variable.
</para><para>
This option only applies to the Linux platform.
</para><para>
When Home Manager is configured with NixOS, the default value
will be set to <varname>i18n.glibcLocales</varname> from the
system configuration.
'';
example = literalExpression ''
pkgs.glibcLocales.override {
allLocales = false;
locales = [ "en_US.UTF-8/UTF-8" ];
}
'';
# NB. See nixos/default.nix for NixOS default.
default = pkgs.glibcLocales;
defaultText = literalExpression "pkgs.glibcLocales";
};
};
config = mkIf pkgs.stdenv.hostPlatform.isLinux {
# For shell sessions.
home.sessionVariables = localeVars;