* Unreal Tournament 2004 Demo. Also a binary-only component.

  An interesting complication is that we have to change the ELF type
  of the executable from `Linux' to `SVR4', otherwise the
  `ld-linux.so.2' trick to override the glibc used doesn't work
  (apparently `Linux' is not a recognised ELF type!).

  UT doesn't work with software Mesa, so right now we impurily use
  `/usr/lib/libGL.so'.  I cannot really test whether it works with
  hardware Mesa, since it barfs with an error about missing OpenGL
  extensions.  But that's probably because I'm testing this on an
  iBook over an SSH connection to a Linux machine.

svn path=/nixpkgs/trunk/; revision=1047

3 files changed, 64 insertions, 0 deletions

diff --git a/pkgs/games/ut2004demo/builder.sh b/pkgs/games/ut2004demo/builder.sh
new file mode 100644
index 00000000000..a5c8e1735b1
--- /dev/null
+++ b/pkgs/games/ut2004demo/builder.sh
@@ -0,0 +1,22 @@
+. $stdenv/setup
+
+skip=7976
+
+bunzip2 < $src | (dd bs=1 count=$skip of=/dev/null && dd bs=1M) | tar xvf - ut2004demo.tar
+
+mkdir $out
+
+(cd $out && tar xvf -) < ut2004demo.tar
+
+# Patch the executable from ELF OS/ABI type `Linux' (3) to `SVR4' (0).
+# This doesn't seem to matter to ld-linux.so.2 at all, except that it
+# refuses to load `Linux' executables when invokes explicitly, that
+# is, when we do `ld-linux.so.2 $out/System/ut2004-bin', which we need
+# to override the hardcoded ELF interpreter with our own.
+
+# This is a horrible hack, of course.  A better solution would be to
+# patch Glibc so it accepts the `Linux' ELF type as well (why doesn't
+# it?); or to use FreeBSD's `brandelf' program to set to ELF type
+# (which is a bit cleaner than patching using `dd' :-) ).
+(cd $out/System && (echo -en "\000" | dd bs=1 seek=7 of=ut2004-bin conv=notrunc))
+
diff --git a/pkgs/games/ut2004demo/default.nix b/pkgs/games/ut2004demo/default.nix
new file mode 100644
index 00000000000..e079e7819be
--- /dev/null
+++ b/pkgs/games/ut2004demo/default.nix
@@ -0,0 +1,26 @@
+{stdenv, fetchurl, xlibs, mesa}:
+
+assert stdenv.system == "i686-linux";
+
+let {
+
+  raw = stdenv.mkDerivation {
+    name = "ut2004demo-3120";
+    src = fetchurl {
+      url = ftp://ftp.infogrames.net/demos/ut2004/ut2004-lnx-demo-3120.run.bz2;
+      md5 = "da200b043add9d083f6aa7581e6829f0";
+    };
+    builder = ./builder.sh;
+  };
+
+  body = stdenv.mkDerivation {
+    name = raw.name;
+    builder = ./make-wrapper.sh;
+    inherit raw mesa;
+    inherit (xlibs) libX11 libXext;
+  };
+
+}
+
+# http://mirror1.icculus.org/ut2004/ut2004-lnxpatch3204.tar.bz2
+# 5f659552095b878a029b917d216d9664
diff --git a/pkgs/games/ut2004demo/make-wrapper.sh b/pkgs/games/ut2004demo/make-wrapper.sh
new file mode 100644
index 00000000000..0df8b9c6e82
--- /dev/null
+++ b/pkgs/games/ut2004demo/make-wrapper.sh
@@ -0,0 +1,16 @@
+. $stdenv/setup
+
+mkdir $out
+mkdir $out/bin
+
+glibc=$(cat $NIX_GCC/nix-support/orig-glibc)
+
+cat > $out/bin/ut2004demo <<EOF
+#! $SHELL -e
+
+cd $raw/System
+
+LD_LIBRARY_PATH=$libX11/lib:$libXext/lib:/usr/lib:$mesa/lib $glibc/lib/ld-linux.so.2 ./ut2004-bin "\$@"
+EOF
+
+chmod +x $out/bin/ut2004demo