plex: init at 0.9.11.16.958

Added a package and module for Plex Media Server, an application for
managing media collections across multiple devices.

pkgs/servers/plex/default.nix

@@ -0,0 +1,65 @@
+{ stdenv, fetchurl, rpmextract, glibc
+, dataDir ? "/var/lib/plex" # Plex's data directory must be baked into the package due to symlinks.
+}:
+
+stdenv.mkDerivation rec {
+  name = "plex-${version}";
+  version = "0.9.11.16.958";
+  vsnHash = "80f1748";
+
+  src = fetchurl {
+    url = "https://downloads.plex.tv/plex-media-server/${version}-${vsnHash}/plexmediaserver-${version}-${vsnHash}.x86_64.rpm";
+    sha256 = "1wrl654nk10i9p01cgy9fqiqalxyl718qhp4kjnxvcwafayxkp26";
+  };
+
+  buildInputs = [ rpmextract glibc ];
+
+  phases = [ "unpackPhase" "installPhase" "fixupPhase" "distPhase" ];
+
+  unpackPhase = ''
+    rpmextract $src
+  '';
+
+  installPhase = ''
+    install -d $out/usr/lib
+    cp -dr --no-preserve='ownership' usr/lib/plexmediaserver $out/usr/lib/
+
+    # Now we need to patch up the executables and libraries to work on Nix.
+    # Side note: PLEASE don't put spaces in your binary names. This is stupid.
+    for bin in "Plex Media Server" "Plex DLNA Server" "Plex Media Scanner"; do
+      patchelf --set-interpreter "${glibc}/lib/ld-linux-x86-64.so.2" "$out/usr/lib/plexmediaserver/$bin"
+      patchelf --set-rpath "$out/usr/lib/plexmediaserver" "$out/usr/lib/plexmediaserver/$bin"
+    done
+
+    find $out/usr/lib/plexmediaserver/Resources -type f -a -perm +0100 \
+        -print -exec patchelf --set-interpreter "${glibc}/lib/ld-linux-x86-64.so.2" '{}' \;
+
+
+    # Our next problem is the "Resources" directory in /usr/lib/plexmediaserver.
+    # This is ostensibly a skeleton directory, which contains files that Plex
+    # copies into its folder in /var. Unfortunately, there are some SQLite
+    # databases in the directory that are opened at startup. Since these
+    # database files are read-only, SQLite chokes and Plex fails to start. To
+    # solve this, we keep the resources directory in the Nix store, but we
+    # rename the database files and replace the originals with symlinks to
+    # /var/lib/plex. Then, in the systemd unit, the base database files are
+    # copied to /var/lib/plex before starting Plex.
+    RSC=$out/usr/lib/plexmediaserver/Resources
+    for db in "com.plexapp.plugins.library.db"; do
+        mv $RSC/$db $RSC/base_$db
+        ln -s ${dataDir}/.skeleton/$db $RSC/$db
+    done
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = http://plex.tv/;
+    license = licenses.unfree;
+    platforms = platforms.linux;
+    maintainers = with stdenv.lib.maintainers; [ forkk ];
+    description = "Media / DLNA server";
+    longDescription = ''
+      Plex is a media server which allows you to store your media and play it
+      back across many different devices.
+    '';
+  };
+}