/* This function builds just the `lib/locale/locale-archive' file from
   Glibc and nothing else.  If `allLocales' is true, all supported
   locales are included; otherwise, just the locales listed in
   `locales'.  See localedata/SUPPORTED in the Glibc source tree for
   the list of all supported locales:
   http://sourceware.org/cgi-bin/cvsweb.cgi/libc/localedata/SUPPORTED?cvsroot=glibc
*/

{ stdenv, fetchurl, allLocales ? true, locales ? ["en_US.UTF-8/UTF-8"] }:

stdenv.mkDerivation rec {
  name = "glibc-locales-2.9";
  
  src = fetchurl {
    url = http://nixos.org/tarballs/glibc-2.9-20081208.tar.bz2;
    sha256 = "0zhxbgcsl97pf349m0lz8d5ljvvzrcqc23yf08d888xlk4ms8m3h";
  };

  configurePhase = "true";

  # Awful hack: `localedef' doesn't allow the path to `locale-archive'
  # to be overriden, but you *can* specify a prefix, i.e. it will use
  # <prefix>/<path-to-glibc>/lib/locale/locale-archive.  So we use
  # $TMPDIR as a prefix, meaning that the locale-archive is placed in
  # $TMPDIR/nix/store/...-glibc-.../lib/locale/locale-archive.
  buildPhase =
    ''
      touch config.make
      touch config.status
      mkdir -p $TMPDIR/"$(dirname $(readlink -f $(type -p localedef)))/../lib/locale"
      make localedata/install-locales \
          LOCALEDEF="localedef --prefix=$TMPDIR" \
          localedir=$out/lib/locale \
          ${if allLocales then "" else "SUPPORTED-LOCALES=\"${toString locales}\""}
    '';

  installPhase =
    ''
      ensureDir $out/lib/locale
      cp $TMPDIR/nix/store/*/lib/locale/locale-archive $out/lib/locale/
    '';

  meta = {
    homepage = http://www.gnu.org/software/libc/;
    description = "Locale information for the GNU C Library";
  };
}