Add script to find unused config groups/keys in officecfg

Change-Id: Ic5f71ae8fd2ceab3c2480e083788d904804da213
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/157523
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <samuel.mehrbrodt@allotropia.de>

bin/find-unused-configkeys.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# find group, set and key names in officecfg that are not used in the code base
+# caveat: only effective for reasonably unique strings
+
+for filename in $(find officecfg/ -name "*xcs"); do
+    for gs in group set node-ref; do
+        for gname in $(git grep -h "<$gs" "$filename" | awk -F'oor:name="' '{print $2}' | awk -F'"' '{print $1}') ; do
+            if [ $(git grep "$gname" | grep -v ^officecfg | wc -l) -eq 0 ] ;
+            then
+                # group, set or node-ref names may serve as oor:node-type templates
+                if [ $(git grep "$gname" officecfg | grep oor:node-type | wc -l ) -eq 0 ] ;
+                then
+                    echo "$gname group in "$filename" appears only in officecfg";
+                fi
+            fi
+        done
+    done
+
+    for pname in $(git grep -h "<prop" "$filename" | awk -F'oor:name="' '{print $2}' | awk -F'"' '{print $1}') ; do
+        if [ $(git grep "$pname" | grep -v ^officecfg | wc -l) -eq 0 ] ;
+        then
+            echo "$pname property in "$filename" appears only in officecfg";
+        fi
+    done
+
+done