complete rewrite, now much faster and finds also unset messages

scripts/find_unused_messages.sh

@@ -2,15 +2,30 @@
 
 # Simple script to find unused message strings by Michal Čihař
 
-phpfiles=`find . -type f -a -name '*.php' -a -not -path '*/lang/*'`
+tmp1=`mktemp`
+tmp2=`mktemp`
+grep -o '\<str[A-Z][a-zA-Z0-9_]*\>' lang/english-iso-8859-1.inc.php \
+    | grep -Ev '^str(Transformation_|ShowStatus)' | sort -u > $tmp1
+grep -ho '\<str[A-Z][a-zA-Z0-9_]*\>' `find . -type f -a -name '*.php' -a -not -path '*/lang/*'` \
+    | grep -Ev '^str(Transformation_|ShowStatus)' | sort -u > $tmp2
 
-grep -o 'str[A-Z][a-zA-Z_]*' lang/english-iso-8859-1.inc.php \
-    | grep -Ev '^str(Transformation_|ShowStatus)' \
-    | while read x
-        do
-            echo "Checking for $x" >&2
-            if [ `grep -r "\\<$x\\>" $phpfiles | wc -l` -eq 0 ]
-            then
-                echo $x
-            fi
-        done
+echo Please note that you need to check results of this script, it doesn\'t
+echo understand PHP, it only tries to find what looks like message name.
+
+echo
+echo Used messages not present in english language file:
+echo '(this contains generated messages and composed message names, so these'
+echo 'are not necessary a errors!)'
+echo
+
+# filter out known false positives
+diff $tmp1 $tmp2 | awk '/^>/ {print $2}' | grep -Ev '(strEncto|strXkana|strDBLink|strPrivDesc|strPrivDescProcess|strTableListOptions|strMissingParameter|strAttribute)'
+
+echo
+echo Not used messages present in english language file:
+echo
+
+diff $tmp1 $tmp2 | awk '/^</ {print $2}'
+
+
+rm -f $tmp1 $tmp2