humblebundle: Add GuacaMelee

This comes with an LD_PRELOAD wrapper that is just used for the initial
chdir() where the game tries to set its working directory to the data
files.

After that all loading of the preload wrapper will fail, but that's
okay because we just need to set the data directory and be done with it.

We also introduce a callPackage_i686 which is equivalent to the one in
<nixpkgs> but also adds our own packages to the set.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

2 files changed, 63 insertions, 0 deletions

diff --git a/humblebundle/default.nix b/humblebundle/default.nix
index 953f3481..8be6fa16 100644
--- a/humblebundle/default.nix
+++ b/humblebundle/default.nix
@@ -5,6 +5,7 @@ let
 
   self = rec {
     callPackage = pkgs.lib.callPackageWith (pkgs // self);
+    callPackage_i686 = pkgs.lib.callPackageWith (pkgs.pkgsi686Linux // self);
 
     fetchHumbleBundle = callPackage ./fetch-humble-bundle {
       inherit (config.humblebundle) email password;
@@ -14,6 +15,7 @@ let
     cavestoryplus = callPackage ./cavestoryplus.nix {};
     fez = callPackage ./fez.nix {};
     ftl = callPackage ./ftl.nix {};
+    guacamelee = callPackage_i686 ./guacamelee.nix {};
     hammerwatch = callPackage ./hammerwatch.nix {};
     jamestown = callPackage ./jamestown.nix {};
     megabytepunch = callPackage ./megabytepunch.nix {};
diff --git a/humblebundle/guacamelee.nix b/humblebundle/guacamelee.nix
new file mode 100644
index 00000000..537ec945
--- /dev/null
+++ b/humblebundle/guacamelee.nix
@@ -0,0 +1,61 @@
+{ stdenv, fetchHumbleBundle, unzip, SDL2, mesa, writeText, makeWrapper }:
+
+stdenv.mkDerivation rec {
+  name = "guacamelee-${version}";
+  version = "1393037377";
+
+  src = fetchHumbleBundle {
+    machineName = "guacamelee_goldedition_linux";
+    suffix = "sh";
+    md5 = "b06af932c1aaefb8f157c977061388ef";
+  };
+
+  unpackCmd = ''
+    ${unzip}/bin/unzip "$src" 'data/*' || :
+  '';
+
+  preloader = writeText "guacamelee-preloader.c" ''
+    #define _GNU_SOURCE
+    #include <dlfcn.h>
+
+    int chdir(const char *path) {
+      int (*_chdir) (const char *) = dlsym(RTLD_NEXT, "chdir");
+      return _chdir(DATA);
+    }
+  '';
+
+  buildInputs = [ makeWrapper ];
+
+  buildPhase = let
+    rpath = stdenv.lib.makeLibraryPath [ SDL2 stdenv.cc.cc mesa ];
+    fmodRpath = stdenv.lib.makeLibraryPath [ stdenv.cc.cc ];
+  in ''
+    gcc -Werror -shared "$preloader" -o preloader.so -ldl \
+      -DDATA=\"$out/share/guacamelee\"
+
+    for i in libfmodevent-4.44.27.so libfmodex-4.44.27.so; do
+      patchelf --set-rpath "${fmodRpath}:$out/libexec/guacamelee" \
+        "x86/lib32/$i"
+    done
+    patchelf \
+      --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
+      --set-rpath "${rpath}:$out/libexec/guacamelee" x86/game-bin
+  '';
+
+  installPhase = ''
+    install -vD x86/game-bin "$out/libexec/guacamelee/guacamelee"
+    install -vD preloader.so "$out/libexec/guacamelee/preloader.so"
+
+    makeWrapper "$out/libexec/guacamelee/guacamelee" "$out/bin/guacamelee" \
+      --set LD_PRELOAD "$out/libexec/guacamelee/preloader.so"
+
+    for i in libfmodevent-4.44.27.so libfmodex-4.44.27.so; do
+      install -vD "x86/lib32/$i" "$out/libexec/guacamelee/$i"
+    done
+
+    mkdir -p "$out/share"
+    cp -vRd noarch "$out/share/guacamelee"
+  '';
+
+  dontStrip = true;
+}