1 files changed, 84 insertions, 0 deletions
diff --git a/nixos/modules/config/i18n.nix b/nixos/modules/config/i18n.nix
new file mode 100644
index 0000000000000..c3e39717258bc
--- /dev/null
+++ b/nixos/modules/config/i18n.nix
@@ -0,0 +1,84 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+
+  glibcLocales = pkgs.glibcLocales.override {
+    allLocales = any (x: x == "all") config.i18n.supportedLocales;
+    locales = config.i18n.supportedLocales;
+  };
+
+in
+
+{
+  ###### interface
+
+  options = {
+
+    i18n = {
+      defaultLocale = mkOption {
+        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 {
+        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 {
+        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 {
+        default = "us";
+        example = "fr";
+        description = "
+          The keyboard mapping table for the virtual consoles.
+        ";
+        type = types.uniq types.string;
+      };
+
+    };
+
+  };
+
+
+  ###### 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}
+          '';
+      };
+
+  };
+}