New test script and fixing of MacOSX problems

.travis.yml

@@ -0,0 +1,14 @@
+os:
+  - linux
+  - osx
+
+sudo: false
+
+language: perl
+
+# normally cpanm is called for perl, but we do not need it so skip the installation of dependencies
+install: true
+
+script:
+  - cd t
+  - prove ./test.sh

bin/SeqChunker

@@ -7,9 +7,42 @@
 #
 # Last Modified: Thomas Hackl, 2014-09-10
 
-# Version 0.3 
-# reliable detect binary folder
-Bin="$(dirname "$(readlink -f "$0")")"
+# Version 0.4
+# reliable detect binary folder with compability to MacOSX
+function expand_link {
+        FILE="$1"
+
+        TRACKING_FILE=$(mktemp)
+
+        echo "$FILE" >"$TRACKING_FILE"
+
+        NEW_FILE=$(readlink "$FILE");
+
+        while [ "$?" -eq 0 ]
+        do
+                echo "$NEW_FILE" >>"$TRACKING_FILE"
+
+                # check for duplicates
+                NUM_DUPLICATES=$(cat "$TRACKING_FILE" | sort | uniq -d | wc -l)
+
+                if [ "$NUM_DUPLICATES" -gt 0 ]
+                then
+                        break
+                fi
+
+                FILE=$(dirname "$FILE")/"$NEW_FILE"
+                echo "$FILE" >&2
+                NEW_FILE=$(readlink "$FILE")
+        done
+
+        rm "$TRACKING_FILE"
+
+        echo "FILE should be located at '$FILE'" >&2
+
+        echo "$FILE"
+}
+
+Bin="$(dirname "$(expand_link "$0")")"
 
 # check if perl exists, than use the perl version
 if [ ! -z $(which perl) ]; then