plex: rewrite to use FHS userenv
This commit is contained in:
Andrew Dunham
@@ -1,81 +1,102 @@
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{ config, stdenv, fetchurl, rpmextract, glibc
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, dataDir ? "/var/lib/plex" # Plex's data directory must be baked into the package due to symlinks.
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, enablePlexPass ? config.plex.enablePlexPass or false
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# The actual Plex package that we run is a FHS userenv of the "raw" package.
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{ stdenv
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, buildFHSUserEnv
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, writeScript
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, plexRaw
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# Old argument for overriding the Plex data directory; isn't necessary for this
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# version of Plex to function, but still around for backwards-compatibility.
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, dataDir ? "/var/lib/plex"
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}:
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let
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plexPass = throw "Plex pass has been removed at upstream's request; please unset nixpkgs.config.plex.pass";
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plexpkg = if enablePlexPass then plexPass else {
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version = "1.15.3.876";
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vsnHash = "ad6e39743";
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sha256 = "01g7wccm01kg3nhf3qrmwcn20nkpv0bqz6zqv2gq5v03ps58h6g5";
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};
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buildFHSUserEnv rec {
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name = "plexmediaserver";
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inherit (plexRaw) meta;
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in stdenv.mkDerivation rec {
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name = "plex-${version}";
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version = plexpkg.version;
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vsnHash = plexpkg.vsnHash;
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sha256 = plexpkg.sha256;
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# This script is run when we start our Plex binary
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runScript = writeScript "plex-run-script" ''
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#!${stdenv.shell}
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src = fetchurl {
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url = "https://downloads.plex.tv/plex-media-server-new/${version}-${vsnHash}/redhat/plexmediaserver-${version}-${vsnHash}.x86_64.rpm";
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inherit sha256;
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};
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set -eu
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buildInputs = [ rpmextract glibc ];
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# The root path to our Plex installation
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root=${plexRaw}/lib/plexmediaserver
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phases = [ "unpackPhase" "installPhase" "fixupPhase" "distPhase" ];
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# Path to where we're storing our Plex data files. We default to storing
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# them in the user's home directory under the XDG-compatible location, but
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# allow overriding with an environment variable so the location can be
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# configured in our NixOS module.
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#
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# NOTE: the old version of Plex used /var/lib/plex as the default location,
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# but this package shouldn't assume that we're going to run Plex with the
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# ability to write to /var/lib, so using a subdirectory of $HOME when none
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# is specified feels less likely to have permission errors.
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if [[ -z "''${PLEX_DATADIR:-}" ]]; then
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PLEX_DATADIR="$HOME/.local/share/plex"
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fi
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if [[ ! -d "$PLEX_DATADIR" ]]; then
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echo "Creating Plex data directory: $PLEX_DATADIR"
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mkdir -p "$PLEX_DATADIR"
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fi
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unpackPhase = ''
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rpmextract $src
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# The database is stored under the given directory
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db="$PLEX_DATADIR/.skeleton/com.plexapp.plugins.library.db"
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# If we don't have a database in the expected path, then create one by
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# copying our base database to that location.
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if ! test -f "$db"; then
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echo "Copying base database file to: $db"
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mkdir -p "$(dirname "$db")"
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cat "${plexRaw.basedb}" > "$db"
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fi
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# Set up symbolic link at '/db', which is linked to by our Plex package
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# (see the 'plexRaw' package).
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ln -s "$db" /db
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# If we have a plugin list (set by our NixOS module), we create plugins in
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# the data directory as expected. This is a colon-separated list of paths.
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if [[ -n "''${PLEX_PLUGINS:-}" ]]; then
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echo "Preparing plugin directory"
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pluginDir="$PLEX_DATADIR/Plex Media Server/Plug-ins"
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test -d "$pluginDir" || mkdir -p "$pluginDir"
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# First, remove all of the symlinks in the plugins directory.
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echo "Removing old symlinks"
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for f in $(ls "$pluginDir/"); do
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if [[ -L "$pluginDir/$f" ]]; then
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echo "Removing plugin symlink: $pluginDir/$f"
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rm "$pluginDir/$f"
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fi
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done
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echo "Symlinking plugins"
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IFS=':' read -ra pluginsArray <<< "$PLEX_PLUGINS"
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for path in "''${pluginsArray[@]}"; do
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dest="$pluginDir/$(basename "$path")"
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if [[ ! -d "$path" ]]; then
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echo "Error symlinking plugin from $path: no such directory"
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elif [[ -d "$dest" || -L "$dest" ]]; then
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echo "Error symlinking plugin from $path to $dest: file or directory already exists"
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else
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echo "Symlinking plugin at: $path"
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ln -s "$path" "$dest"
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fi
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done
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fi
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# Tell Plex to use the data directory as the "Application Support"
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# directory, otherwise it tries to write things into the user's home
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# directory.
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export PLEX_MEDIA_SERVER_APPLICATION_SUPPORT_DIR="$PLEX_DATADIR"
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# Tell Plex where the 'home' directory for itself is.
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export PLEX_MEDIA_SERVER_HOME="${plexRaw}/lib/plexmediaserver"
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# Actually run Plex, prepending LD_LIBRARY_PATH with the libraries from
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# the Plex package.
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LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$root exec "$root/Plex Media Server"
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'';
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installPhase = ''
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install -d $out/usr/lib
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cp -dr --no-preserve='ownership' usr/lib/plexmediaserver $out/usr/lib/
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# Now we need to patch up the executables and libraries to work on Nix.
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# Side note: PLEASE don't put spaces in your binary names. This is stupid.
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for bin in "Plex Media Server" \
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"Plex Commercial Skipper" \
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"Plex DLNA Server" \
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"Plex Media Scanner" \
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"Plex Relay" \
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"Plex Script Host" \
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"Plex Transcoder" \
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"Plex Tuner Service" ; do
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patchelf --set-interpreter "${glibc.out}/lib/ld-linux-x86-64.so.2" "$out/usr/lib/plexmediaserver/$bin"
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patchelf --set-rpath "$out/usr/lib/plexmediaserver/lib" "$out/usr/lib/plexmediaserver/$bin"
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done
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find $out/usr/lib/plexmediaserver/Resources -type f -a -perm -0100 \
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-print -exec patchelf --set-interpreter "${glibc.out}/lib/ld-linux-x86-64.so.2" '{}' \;
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# Our next problem is the "Resources" directory in /usr/lib/plexmediaserver.
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# This is ostensibly a skeleton directory, which contains files that Plex
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# copies into its folder in /var. Unfortunately, there are some SQLite
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# databases in the directory that are opened at startup. Since these
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# database files are read-only, SQLite chokes and Plex fails to start. To
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# solve this, we keep the resources directory in the Nix store, but we
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# rename the database files and replace the originals with symlinks to
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# /var/lib/plex. Then, in the systemd unit, the base database files are
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# copied to /var/lib/plex before starting Plex.
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RSC=$out/usr/lib/plexmediaserver/Resources
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for db in "com.plexapp.plugins.library.db"; do
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mv $RSC/$db $RSC/base_$db
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ln -s "${dataDir}/.skeleton/$db" $RSC/$db
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done
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'';
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meta = with stdenv.lib; {
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homepage = https://plex.tv/;
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license = licenses.unfree;
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platforms = platforms.linux;
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maintainers = with stdenv.lib.maintainers; [ colemickens forkk thoughtpolice pjones lnl7 ];
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description = "Media / DLNA server";
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longDescription = ''
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Plex is a media server which allows you to store your media and play it
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back across many different devices.
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'';
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};
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}
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