arx-launcher.sh

 #!/bin/bash
 
-relpathresult=""
-
-relpath() {
-    # both $1 and $2 are absolute paths beginning with /
-    # $1 must be a canonical path; that is none of its directory
-    # components may be ".", ".." or a symbolic link
-    #
-    # returns relative path to $2/$target from $1/$source
-    source=$1
-    target=$2
-
-    common_part=$source
-    result=
-
-    while [ "${target#"$common_part"}" = "$target" ]; do
-        # no match, means that candidate common part is not correct
-        # go up one level (reduce common part)
-        common_part=$(dirname "$common_part")
-        # and record that we went back, with correct / handling
-        if [ -z "$result" ]; then
-            result=..
-        else
-            result=../$result
-        fi
-    done
-
-    if [ "$common_part" = / ]; then
-        # special case for root (no common path)
-        result=$result/
-    fi
-
-    # since we now have identified the common part,
-    # compute the non-common part
-    forward_part=${target#"$common_part"}
-
-    # and now stick all parts together
-    if [ -n "$result" ] && [ -n "$forward_part" ]; then
-        result=$result$forward_part
-    elif [ -n "$forward_part" ]; then
-        # extra slash removal
-        result=${forward_part#?}
-    fi
-
-    relpathresult="$result"
+lowercase () {
+	echo "$@" | tr '[:upper:]' '[:lower:]'
 }
 
-processfile() {
-    fname=$1
-    
-    convertedfilename=$(echo "$fname" | tr '[:upper:]' '[:lower:]')
-	pathexistscheck=$(readlink -e "$convertedfilename")
-	dirname=$(dirname "$convertedfilename")
-	
-	if [ ! -d "$dirname" ]
-	then
-        mkdir -p "$dirname"
-	fi
-	
-	relpath "$dirname" "$fname"
-	relativepathtorealfile="$relpathresult"
-	if [ -z "$pathexistscheck" ]
-	then
-		echo "$fname -> $convertedfilename"
-		ln -s "$relativepathtorealfile" "$convertedfilename"
-	fi
+create_relative_symlink () {
+	local -r target=$1
+	local -r symlink="share/arx/data/$(lowercase "$target")"
+	mkdir -p "$(dirname "$symlink")"
+	ln -rsf "$target" "$symlink"
 }
 
-find . -maxdepth 1 -type f -name "[[:upper:]]*" | while read fname; do
-	processfile "$fname"
-done
+# http://wiki.arx-libertatis.org/Required_data_files_and_checksums
 
-find ./Graph -type f | while read fname; do
-	processfile "$fname"
+find {misc,Graph} -type f  | while read -r file_name ; do
+	create_relative_symlink "$file_name"
 done
-
-find ./misc -type f | while read fname; do
-	processfile "$fname"
+for pak in *.pak ; do
+	create_relative_symlink "$pak"
 done
 
-./arx-bin --data-dir=.
+./arx-bin --data-dir=share/arx/data "$@"