Add plex

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

packages/docker/plex/entrypoint.sh

@@ -0,0 +1,59 @@
+#!/usr/bin/env sh
+
+set -o errexit
+set -o nounset
+
+PREFERENCES="/var/lib/plex/Plex Media Server/Preferences.xml"
+TEMPLATE_PREFERENCES="/etc/plex/Preferences.xml"
+
+getPref() {
+  xmlstarlet sel -t -v "/Preferences/@$1" "$PREFERENCES" 2>/dev/null || true
+}
+
+setPref() {
+  name="$1"
+  value="$2"
+
+  xmlstarlet ed --inplace \
+    -d "/Preferences/@${name}" \
+    -i "/Preferences" -t attr -n "${name}" -v "${value}" \
+    "$PREFERENCES"
+}
+
+mkdir -p "$(dirname "$PREFERENCES")"
+if [ ! -f "$PREFERENCES" ]; then
+  echo '<?xml version="1.0" encoding="utf-8"?><Preferences/>' > "$PREFERENCES"
+fi
+
+if [ -f "$TEMPLATE_PREFERENCES" ]; then
+  ATTRS="$(xmlstarlet sel -t -m "/Preferences/@*" -v "concat(name(),'=',.)" -n "$TEMPLATE_PREFERENCES")"
+
+  if [ -n "$ATTRS" ]; then
+    set --
+
+    while IFS='=' read -r name value; do
+      [ -z "$name" ] && continue
+      set -- "$@" -d "/Preferences/@${name}"
+      set -- "$@" -i "/Preferences" -t attr -n "${name}" -v "${value}"
+    done <<EOF
+$ATTRS
+EOF
+
+    if [ "$#" -gt 0 ]; then
+      xmlstarlet ed --inplace "$@" "$PREFERENCES"
+    fi
+  fi
+fi
+
+rm -f "/var/lib/plex/Plex Media Server/plexmediaserver.pid"
+plexmediaserver &
+PID="$!"
+
+if [ -f /etc/plex/post-start.sh ]; then
+  # shellcheck disable=SC1091
+  . /etc/plex/post-start.sh
+fi
+
+trap 'kill -QUIT "$PID"' INT TERM
+wait "$PID"
+exit $?