nixpkgs/pkgs/shells/zsh/default.nix

{ stdenv, fetchurl, ncurses, coreutils }:

let

  version = "4.3.15";

  documentation = fetchurl {
    url = "mirror://sourceforge/zsh/zsh-${version}-doc.tar.bz2";
    sha256 = "73b7ee1a737fbaf9be77cf6b55b27cca96bac39bc5ef25efa9ceb427cd1b5ad4";
  };
  
in

stdenv.mkDerivation {
  name = "zsh-${version}";

  src = fetchurl {
    url = "mirror://sourceforge/zsh/zsh-${version}.tar.bz2";
    sha256 = "8708f485823fb7e51aa696776d0dfac7d3558485182672cf9311c12a50a95486";
  };
  
  buildInputs = [ ncurses coreutils ];

  preConfigure = ''
    configureFlags="--enable-maildir-support --enable-multibyte --enable-zprofile=$out/etc/zprofile --with-tcsetpgrp"
  '';

  # XXX: think/discuss about this, also with respect to nixos vs nix-on-X
  postInstall = ''
    ensureDir $out/share/
    tar xf ${documentation} -C $out/share
    ensureDir $out/etc/
    cat > $out/etc/zprofile <<EOF
if test -r /etc/zprofile; then
  . /etc/zprofile
else
  emulate bash
  alias shopt=false
  . /etc/profile
  unalias shopt
  emulate zsh
fi
if test -r /etc/zprofile.local; then
  . /etc/zprofile.local
fi
EOF
    $out/bin/zsh -c "zcompile $out/etc/zprofile"
    mv $out/etc/zprofile $out/etc/zprofile_zwc_is_used
  '';
  # XXX: patch zsh to take zwc if newer _or equal_

  meta = {
    description = "the Z shell";
    longDescription = "Zsh is a UNIX command interpreter (shell) usable as an interactive login shell and as a shell script command processor.  Of the standard shells, zsh most closely resembles ksh but includes many enhancements.  Zsh has command line editing, builtin spelling correction, programmable command completion, shell functions (with autoloading), a history mechanism, and a host of other features.";
    license = "MIT-like";
    homePage = "http://www.zsh.org/";
    maintainers = with stdenv.lib.maintainers; [ chaoflow ];
    platforms = stdenv.lib.platforms.gnu;  # arbitrary choice
  };
}