[NixOS] Add gitter

dotfiles/config/systemd/user/gitter.service

@@ -4,7 +4,8 @@ Wants=taffybar.service
 After=taffybar.service
 
 [Service]
-ExecStart=/usr/bin/env run_unity.sh gitter
+ExecStart=/usr/bin/env Gitter
+ExecStart/usr/bin/env pkill Gitter
 Restart=always
 
 [Install]

nixos/configuration.nix

@@ -1,5 +1,6 @@
 { config, pkgs, ... }:
 let
+  gitter = with pkgs; callPackage ./gitter.nix { };
   my-python-packages = python-packages: with python-packages; [
     appdirs
     requests
@@ -134,6 +135,7 @@ in
     emacs
     firefox
     kleopatra
+    gitter
     google-chrome
     hexchat
     keybase-gui-fixed

nixos/gitter.nix

@@ -0,0 +1,65 @@
+{ stdenv, alsaLib, atk, cairo, cups, dbus, dpkg, expat, fetchurl
+, fontconfig, freetype, gdk_pixbuf, glib, gnome3, gtk3, libX11
+, libXScrnSaver, libXcomposite, libXcursor, libXdamage, libXext, libXfixes
+, libXi, libXrandr, libXrender, libXtst, libappindicator-gtk3, libcxx
+, libnotify, libpulseaudio, libxcb, makeDesktopItem, makeWrapper, nspr, nss
+, nwjs, pango, systemd }:
+
+stdenv.mkDerivation rec {
+  pname = "gitter";
+  version = "4.1.0";
+  name = "${pname}-${version}";
+
+  src = fetchurl {
+    url = "https://update.gitter.im/linux64/${pname}_${version}_amd64.deb";
+    sha256 = "1gny9i2pywvczzrs93k8krqn6hwm6c2zg8yr3xmjqs3p88817wbi";
+  };
+
+  nativeBuildInputs = [ makeWrapper dpkg ];
+
+  unpackPhase = "dpkg -x $src .";
+
+  libPath = stdenv.lib.makeLibraryPath [
+    alsaLib atk cairo cups dbus expat fontconfig freetype gdk_pixbuf glib
+    gnome3.gconf gtk3 libX11 libXScrnSaver libXcomposite libXcursor libXdamage
+    libXext libXfixes libXi libXrandr libXrender libXtst libappindicator-gtk3
+    libcxx libnotify libpulseaudio libxcb nspr nss pango stdenv.cc.cc systemd
+  ];
+
+  gitterDirectorySuffix = "opt/gitter";
+
+  installPhase = ''
+    mkdir -p $out/{bin,opt/gitter,share/pixmaps}
+    mv ./opt/Gitter/linux64/* $out/opt/gitter
+
+    patchelf --debug --set-interpreter ${stdenv.cc.bintools.dynamicLinker} \
+         --set-rpath "$out/${gitterDirectorySuffix}/lib:${libPath}" \
+         $out/${gitterDirectorySuffix}/Gitter
+
+    patchelf --debug --set-rpath "$out/${gitterDirectorySuffix}/lib:${libPath}" \
+         $out/${gitterDirectorySuffix}/lib/libnw.so
+
+    wrapProgram $out/${gitterDirectorySuffix}/Gitter --prefix LD_LIBRARY_PATH : ${libPath}
+
+    ln -s $out/${gitterDirectorySuffix}/Gitter $out/bin/
+    ln -s $out/${gitterDirectorySuffix}/logo.png $out/share/pixmaps/gitter.png
+    ln -s "${desktopItem}/share/applications" $out/share/
+  '';
+
+  desktopItem = makeDesktopItem {
+    name = pname;
+    exec = "Gitter";
+    icon = pname;
+    desktopName = "Gitter";
+    genericName = meta.description;
+    categories = "Network;InstantMessaging;";
+  };
+
+  meta = with stdenv.lib; {
+    description = "Where developers come to talk";
+    downloadPage = "https://gitter.im/apps";
+    license = licenses.mit;
+    maintainers = [ maintainers.imalison ];
+    platforms = [ "x86_64-linux" ];
+  };
+}