diff -r 5a57acce9cae -r f84849acda02 tools/update_lua_locale_files.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/update_lua_locale_files.sh	Fri Oct 20 18:44:41 2017 +0200
@@ -0,0 +1,94 @@
+#!/bin/sh -
+# Script to update all Lua locale files.
+# It's Clunky and slow!
+# Note this script may sooner or later be phased out when we move to Gettext.
+
+# HOW TO USE:
+# - Run this script in the tools/ directory.
+# - All .lua files in share/hedgewars/Data/Locale will be updated.
+# - Change LOCALEFILES below to limit the number of locale files to update
+
+# Space-separated list of locale files to update, or *.lua for all.
+# (Note: always include stub.lua)
+LOCALEFILES="*.lua"
+
+# List of all Lua files to scan:
+# * Missions
+# * Campaign missions
+# * Lua libraries
+# * Styles (aka multiplayer scripts)
+# * Mission maps
+# IMPORTANT: Don't forget to update this list when new places for Lua
+#            directories have been added!
+LUAFILES="../Missions/Challenge/*.lua\
+ ../Missions/Scenario/*.lua\
+ ../Missions/Training/*.lua\
+ ../Missions/Campaign/*/*.lua\
+ ../Scripts/*.lua\
+ ../Scripts/Multiplayer/*.lua\
+ ../Maps/*/map.lua"
+
+cd ../share/hedgewars/Data/Locale;
+
+# Collect strings
+echo "Step 1: Collect strings";
+echo -n "" > __temp_loc;
+for F in loc loc_noop;
+	do
+	grep -F "$F(\"" $LUAFILES | sed 's/")/")\n/g' | sed "s/.*$F(\"/loc(\"/;s/\").*/\")/" | grep loc | sort | uniq >> __temp_loc;
+done
+
+# Update locale files
+# This step is clunky and inefficient. Improve performance (if you are bored)!
+echo "Step 2: Update locale files (this may take a while)";
+for i in $LOCALEFILES;
+do
+	echo $i;
+	cat __temp_loc | while read f
+		do
+		STR=$(echo "$f" | sed 's/loc("//;s/")\s*$//;s/"/\\"/g');
+		MAPS=$(grep -F -l -- "loc(\"${STR}\")" $LUAFILES | sed 's/.*\/\([^\/]*\)\/map.lua/\1/;s/.*Campaign\/\([^\/]*\)\//\1:/;s/.*\///;s/.lua//;s/ /_/g' | xargs | sed 's/ /, /g');
+		C=$(echo $MAPS | sed 's/,/\n/' | wc -l)
+		grep -Fq -- "[\"${STR}\"]" $i;
+		if (($?));
+		then
+			if ((C>0));
+			then
+				echo "--      [\"${STR}\"] = \"\", -- $MAPS" >> $i;
+			else
+				echo "--      [\"${STR}\"] = \"\"," >> $i;
+			fi;
+		fi;
+	done;
+done
+
+# Sort
+echo "Step 3: Sort strings";
+for i in $LOCALEFILES;
+do
+	echo $i;
+	rm -f __temp_head __temp_tail __temp_lua;
+	cat $i | grep -Ev "}|{" | grep -Ev "^[[:space:]]*$" | sort | uniq > __temp_lua;
+	echo "locale = {" > __temp_head;
+	echo "}" > __temp_tail;
+	cat __temp_head __temp_lua __temp_tail > $i;
+done
+
+# Drop unused
+echo "Step 4: Delete unused strings";
+cat stub.lua | grep '"] =' | while read f;
+do
+	PHRASE=$(echo "$f" | sed 's/[^[]*\["//;s/"] =.*//;s/"/\\"/g');
+	CNT=$(grep -Frc "loc(\"$PHRASE\")" __temp_loc);
+	if (($CNT==0));
+	then
+		echo "|$PHRASE|";
+		PHRASE=$(echo "$PHRASE" | sed 's/\\/\\\\/g;s/\[/\\[/g;s/\]/\\]/g;s/\//\\\//g');
+		sed -i "/.*\[\"$PHRASE\"\].*/d" $LOCALEFILES;
+	fi;
+done
+
+# Delete temporary files
+rm __temp_head __temp_tail __temp_lua __temp_loc;
+
+echo "Done."