nixpkgs/pkgs/shells/zsh/default.nix

{ lib
, stdenv
, fetchurl
, fetchpatch
, autoreconfHook
, yodl
, perl
, groff
, util-linux
, texinfo
, ncurses
, pcre
, pkg-config
, buildPackages }:

let
  version = "5.9";
in

stdenv.mkDerivation {
  pname = "zsh";
  inherit version;
  outputs = [ "out" "doc" "info" "man" ];

  src = fetchurl {
    url = "mirror://sourceforge/zsh/zsh-${version}.tar.xz";
    sha256 = "sha256-m40ezt1bXoH78ZGOh2dSp92UjgXBoNuhCrhjhC1FrNU=";
  };

  patches = [
    # fix location of timezone data for TZ= completion
    ./tz_completion.patch
  ];

  strictDeps = true;
  nativeBuildInputs = [ autoreconfHook perl groff texinfo pkg-config ]
                      ++ lib.optionals stdenv.isLinux [ util-linux yodl ];

  buildInputs = [ ncurses pcre ];

  configureFlags = [
    "--enable-maildir-support"
    "--enable-multibyte"
    "--with-tcsetpgrp"
    "--enable-pcre"
    "--enable-zshenv=${placeholder "out"}/etc/zshenv"
    "--disable-site-fndir"
    "--enable-function-subdirs"
  ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform && !stdenv.hostPlatform.isStatic) [
    # Also see: https://github.com/buildroot/buildroot/commit/2f32e668aa880c2d4a2cce6c789b7ca7ed6221ba
    "zsh_cv_shared_environ=yes"
    "zsh_cv_shared_tgetent=yes"
    "zsh_cv_shared_tigetstr=yes"
    "zsh_cv_sys_dynamic_clash_ok=yes"
    "zsh_cv_sys_dynamic_rtld_global=yes"
    "zsh_cv_sys_dynamic_execsyms=yes"
    "zsh_cv_sys_dynamic_strip_exe=yes"
    "zsh_cv_sys_dynamic_strip_lib=yes"
  ];

  postPatch = ''
    substituteInPlace Src/Modules/pcre.mdd \
      --replace 'pcre-config' 'true'
  '';

  preConfigure = ''
    # use pkg-config instead of pcre-config
    configureFlagsArray+=("PCRECONF=''${PKG_CONFIG} libpcre")
  '';

  # the zsh/zpty module is not available on hydra
  # so skip groups Y Z
  checkFlags = map (T: "TESTNUM=${T}") (lib.stringToCharacters "ABCDEVW");

  # XXX: think/discuss about this, also with respect to nixos vs nix-on-X
  postInstall = ''
    make install.info install.html
    mkdir -p $out/etc/
    cat > $out/etc/zshenv <<EOF
if test -e /etc/NIXOS; then
  if test -r /etc/zshenv; then
    . /etc/zshenv
  else
    emulate bash
    alias shopt=false
    if [ -z "\$__NIXOS_SET_ENVIRONMENT_DONE" ]; then
      . /etc/set-environment
    fi
    unalias shopt
    emulate zsh
  fi
  if test -r /etc/zshenv.local; then
    . /etc/zshenv.local
  fi
else
  # on non-nixos we just source the global /etc/zshenv as if we did
  # not use the configure flag
  if test -r /etc/zshenv; then
    . /etc/zshenv
  fi
fi
EOF
    ${if stdenv.hostPlatform == stdenv.buildPlatform then ''
      $out/bin/zsh -c "zcompile $out/etc/zshenv"
    '' else ''
      ${lib.getBin buildPackages.zsh}/bin/zsh -c "zcompile $out/etc/zshenv"
    ''}
    mv $out/etc/zshenv $out/etc/zshenv_zwc_is_used

    rm $out/bin/zsh-${version}
    mkdir -p $out/share/doc/
    mv $out/share/zsh/htmldoc $out/share/doc/zsh-$version
  '';
  # XXX: patch zsh to take zwc if newer _or equal_

  postFixup = ''
    HOST_PATH=$out/bin:$HOST_PATH patchShebangs --host $out/share/zsh/*/functions
  '';

  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 = "https://www.zsh.org/";
    maintainers = with lib.maintainers; [ pSub artturin ];
    platforms = lib.platforms.unix;
    mainProgram = "zsh";
  };

  passthru = {
    shellPath = "/bin/zsh";
  };
}