3be2abb2e6
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
73 lines
2.3 KiB
Nix
73 lines
2.3 KiB
Nix
# The glibc package in Nixpkgs is patched to make it possible to specify
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# an alternative path for the locale archive through a special environment
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# variable. This would allow different versions of glibc to coexist on the
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# same system because each version of glibc could look up different paths
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# for its locale archive should the archive format ever change in
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# incompatible ways.
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#
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# See also:
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# - localedef(1)
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# - https://nixos.org/manual/nixpkgs/stable/#locales
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# - https://github.com/NixOS/nixpkgs/issues/38991
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#
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# Note, the name of the said environment variable gets updated with each
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# breaking release of the glibcLocales package. Periodically check the link
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# below for changes:
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# https://github.com/NixOS/nixpkgs/blob/nixpkgs-unstable/pkgs/development/libraries/glibc/nix-locale-archive.patch
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{ lib, pkgs, config, ... }:
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with lib;
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let
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inherit (config.i18n) glibcLocales;
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inherit (glibcLocales) version;
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archivePath = "${glibcLocales}/lib/locale/locale-archive";
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# lookup the version of glibcLocales and set the appropriate environment vars
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localeVars = if versionAtLeast version "2.27" then {
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LOCALE_ARCHIVE_2_27 = archivePath;
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} else if versionAtLeast version "2.11" then {
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LOCALE_ARCHIVE_2_11 = archivePath;
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} else
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{ };
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in {
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meta.maintainers = with maintainers; [ midchildan ];
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options = {
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i18n.glibcLocales = mkOption {
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type = types.path;
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description = ''
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Customized <literal>glibcLocales</literal> package providing
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the <literal>LOCALE_ARCHIVE_*</literal> environment variable.
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</para><para>
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This option only applies to the Linux platform.
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</para><para>
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When Home Manager is configured with NixOS, the default value
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will be set to <varname>i18n.glibcLocales</varname> from the
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system configuration.
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'';
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example = literalExpression ''
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pkgs.glibcLocales.override {
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allLocales = false;
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locales = [ "en_US.UTF-8/UTF-8" ];
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}
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'';
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# NB. See nixos/default.nix for NixOS default.
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default = pkgs.glibcLocales;
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defaultText = literalExpression "pkgs.glibcLocales";
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};
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};
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config = mkIf pkgs.stdenv.hostPlatform.isLinux {
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# For shell sessions.
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home.sessionVariables = localeVars;
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# For desktop apps.
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systemd.user.sessionVariables = localeVars;
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};
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}
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