add script to check added config options

tools/configdiff.sh

@@ -0,0 +1,70 @@
+#!/bin/sh
+# Extract newily added config.php options
+# by wkpark at gmail.com
+# Since 2022/11/04
+# LGPL/GPL dual license
+
+if [ ! -f "$1" ] || [ ! -f "$2" ]; then
+  echo "Usage: sh ./config.php config.php.default"
+
+  exit 0
+fi
+
+SUCCESS="printf \033[1;32m"
+FAILURE="printf \033[1;31m"
+WARNING="printf \033[1;33m"
+MESSAGE="printf \033[1;34m"
+NORMAL="printf \033[0;39m"
+
+O=o.$$
+A=a.$$
+B=b.$$
+C=c.$$
+N=n.$$
+H=h.$$
+E=confnew.php
+
+grep '^#*\$[^=]\+' $1 |cut -d= -f1 | sed 's/ //g' | uniq > $O
+cat $O | sort > uniq > $A
+grep '^#*\$[^=]\+' $2 |cut -d= -f1 | sed 's/ //g' | sort | uniq > $B
+
+diff -u $A $B | grep '^+#*\$' | cut -c2- > $C
+
+# check already have config
+rm -f $H
+for x in $(cat $A | sed 's/^#*//' | sort | uniq); do
+  grep "^#*$x" $C >> $H
+done
+
+diff -u $H $C | grep '^+#*\$' | cut -c2- > $N
+
+# extract new config params
+rm -f $E
+echo "<?php" > $E
+for x in $(grep '^#*\$[^=]\+' $2 |cut -d= -f1 | sed 's/ //g' | sed 's/^#*//' | uniq); do
+  c=$(grep "^#*$x" $N)
+  ca=$(grep "^#*$x" $E)
+  if [ "$c" != "" ] && [ "$ca" = "" ]; then
+    grep "^#*$x" $2 >> $E
+  fi
+done
+
+newconf=$(wc -l < $E)
+newconf=$(expr $newconf - 1)
+[ "$newconf" = 0 ] && rm $E
+
+rm -r $O $A $B $C $N $H
+
+if [ -f $E ]; then
+  $SUCCESS
+  echo
+  echo "Total $newconf config options found and saved in the confnew.php"
+  echo
+  $NORMAL
+else
+  $WARNING
+  echo
+  echo "No new config options found."
+  echo
+  $NORMAL
+fi