steam: include steam-runtime within chroot

pkgs/games/steam/chrootenv.nix

@@ -1,4 +1,4 @@
-{ lib, buildFHSUserEnv
+{ lib, buildFHSUserEnv, steam-runtime
 , withRuntime ? false
 , withJava    ? false
 , withPrimus  ? false
@@ -7,116 +7,144 @@
 buildFHSUserEnv {
   name = "steam";
 
-  targetPkgs = pkgs:
-    [ pkgs.steam-original
+  targetPkgs = pkgs: with pkgs; [
+      steam-original
       # Errors in output without those
-      pkgs.pciutils
-      pkgs.python2
+      pciutils
+      python2
       # Games' dependencies
-      pkgs.xlibs.xrandr
-      pkgs.which
+      xlibs.xrandr
+      which
+      # needed by gdialog, including in the steam-runtime
+      perl
     ]
-    ++ lib.optional withJava pkgs.jdk
-    ++ lib.optional withPrimus pkgs.primus
+    ++ lib.optional withJava   jdk
+    ++ lib.optional withPrimus primus
     ;
 
-  multiPkgs = pkgs: [
+  multiPkgs = pkgs: with pkgs; [
       # These are required by steam with proper errors
-      pkgs.xlibs.libXcomposite
-      pkgs.xlibs.libXtst
-      pkgs.xlibs.libXrandr
-      pkgs.xlibs.libXext
-      pkgs.xlibs.libX11
-      pkgs.xlibs.libXfixes
+      xlibs.libXcomposite
+      xlibs.libXtst
+      xlibs.libXrandr
+      xlibs.libXext
+      xlibs.libX11
+      xlibs.libXfixes
 
-      pkgs.glib
-      pkgs.gtk2
-      pkgs.bzip2
-      pkgs.zlib
-      pkgs.libpulseaudio
-      pkgs.gdk_pixbuf
+      glib
+      gtk2
+      bzip2
+      zlib
+      libpulseaudio
+      gdk_pixbuf
 
       # Not formally in runtime but needed by some games
-      pkgs.gst_all_1.gstreamer
-      pkgs.gst_all_1.gst-plugins-ugly
+      gst_all_1.gstreamer
+      gst_all_1.gst-plugins-ugly
     ] ++ lib.optionals withRuntime [
       # Without these it silently fails
-      pkgs.xlibs.libXinerama
-      pkgs.xlibs.libXdamage
-      pkgs.xlibs.libXcursor
-      pkgs.xlibs.libXrender
-      pkgs.xlibs.libXScrnSaver
-      pkgs.xlibs.libXi
-      pkgs.xlibs.libSM
-      pkgs.xlibs.libICE
-      pkgs.gnome2.GConf
-      pkgs.freetype
-      pkgs.openalSoft
-      pkgs.curl
-      pkgs.nspr
-      pkgs.nss
-      pkgs.fontconfig
-      pkgs.cairo
-      pkgs.pango
-      pkgs.alsaLib
-      pkgs.expat
-      pkgs.dbus
-      pkgs.cups
-      pkgs.libcap
-      pkgs.SDL2
-      pkgs.libusb1
-      pkgs.dbus_glib
-      pkgs.libav
-      pkgs.atk
+      xlibs.libXinerama
+      xlibs.libXdamage
+      xlibs.libXcursor
+      xlibs.libXrender
+      xlibs.libXScrnSaver
+      xlibs.libXi
+      xlibs.libSM
+      xlibs.libICE
+      gnome2.GConf
+      freetype
+      openalSoft
+      curl
+      nspr
+      nss
+      fontconfig
+      cairo
+      pango
+      alsaLib
+      expat
+      dbus
+      cups
+      libcap
+      SDL2
+      libusb1
+      dbus_glib
+      libav
+      atk
       # Only libraries are needed from those two
-      pkgs.udev182
-      pkgs.networkmanager098
+      udev182
+      networkmanager098
 
       # Verified games requirements
-      pkgs.xlibs.libXmu
-      pkgs.xlibs.libxcb
-      pkgs.xlibs.libpciaccess
-      pkgs.mesa_glu
-      pkgs.libuuid
-      pkgs.libogg
-      pkgs.libvorbis
-      pkgs.SDL
-      pkgs.SDL2_image
-      pkgs.glew110
-      pkgs.openssl
-      pkgs.libidn
+      xlibs.libXmu
+      xlibs.libxcb
+      xlibs.libpciaccess
+      mesa_glu
+      libuuid
+      libogg
+      libvorbis
+      SDL
+      SDL2_image
+      glew110
+      openssl
+      libidn
 
       # Other things from runtime
-      pkgs.xlibs.libXinerama
-      pkgs.flac
-      pkgs.freeglut
-      pkgs.libjpeg
-      pkgs.libpng12
-      pkgs.libsamplerate
-      pkgs.libmikmod
-      pkgs.libtheora
-      pkgs.pixman
-      pkgs.speex
-      pkgs.SDL_image
-      pkgs.SDL_ttf
-      pkgs.SDL_mixer
-      pkgs.SDL2_net
-      pkgs.SDL2_ttf
-      pkgs.SDL2_mixer
-      pkgs.gstreamer
-      pkgs.gst_plugins_base
+      xlibs.libXinerama
+      flac
+      freeglut
+      libjpeg
+      libpng12
+      libsamplerate
+      libmikmod
+      libtheora
+      pixman
+      speex
+      SDL_image
+      SDL_ttf
+      SDL_mixer
+      SDL2_net
+      SDL2_ttf
+      SDL2_mixer
+      gstreamer
+      gst_plugins_base
     ];
 
   extraBuildCommands = ''
     [ -d lib64 ] && mv lib64/steam lib
 
     # FIXME: maybe we should replace this with proper libcurl-gnutls
-    ( cd lib; ln -s libcurl.so.4 libcurl-gnutls.so.4 )
-    [ -d lib64 ] && ( cd lib64; ln -s libcurl.so.4 libcurl-gnutls.so.4 )
+    ln -s libcurl.so.4 lib/libcurl-gnutls.so.4
+    [ -d lib64 ] && ln -s libcurl.so.4 lib64/libcurl-gnutls.so.4
+  '' + lib.optionals withRuntime ''
+    mkdir -p    steamrt/usr
+    ln -s lib32 steamrt/lib
+
+    if [ -d lib64 ]; then
+      ln -s                    ${steam-runtime}/i386/usr/bin     steamrt/bin
+    else
+      ln -s                    ${steam-runtime}/amd64/usr/bin    steamrt/bin
+    fi
+
+    ln -s                      ${steam-runtime}/i386/etc         steamrt/etc
+    ln -s                      ${steam-runtime}/i386/usr/include steamrt/usr/include
+
+    cp -rsf --no-preserve mode ${steam-runtime}/i386/usr/lib     steamrt/lib32
+    cp -rsf                    ${steam-runtime}/i386/lib/*       steamrt/lib32
+
+    cp -rsf --no-preserve mode ${steam-runtime}/amd64/usr/lib    steamrt/lib64
+    cp -rsf                    ${steam-runtime}/amd64/lib/*      steamrt/lib64
+
+    libs=$(ls -dm --quoting-style=escape steamrt/lib{32,64}/{,*/})
+
+    echo    'export STEAM_RUNTIME=0'                    >  steamrt/profile
+    echo    'export PATH=$PATH:/steamrt/bin'            >> steamrt/profile
+    echo -n 'export LD_LIBRARY_PATH=/'                  >> steamrt/profile
+    echo -n $libs | sed 's/\/, /:\//g' | sed 's/\/$//g' >> steamrt/profile
+    echo    ':$LD_LIBRARY_PATH'                         >> steamrt/profile
   '';
 
   profile = if withRuntime then ''
-    export STEAM_RUNTIME=0
+    source /steamrt/profile
   '' else ''
     # Ugly workaround for https://github.com/ValveSoftware/steam-for-linux/issues/3504
     export LD_PRELOAD=/lib32/libpulse.so:/lib64/libpulse.so:/lib32/libasound.so:/lib64/libasound.so:$LD_PRELOAD