Fixes internetwache#5

The ERE grep mode didn't match the git ls-tree data, so to fix the
parsing, we'll use awk now.

Author: gehaxelt

Extractor/extractor.sh

@@ -25,11 +25,11 @@ function traverse_tree() {
     #Read blobs/tree information from root tree
 	git ls-tree $tree |
 	while read leaf; do
-		type=$(echo $leaf | grep -oE "^\d+\s+\K\w{4}");
-		hash=$(echo $leaf | grep -oE "^\d+\s+\w{4}\s+\K\w{40}");
-		name=$(echo $leaf | grep -oE "^\d+\s+\w{4}\s+\w{40}\s+\K.*");
+		type=$(echo $leaf | awk -F' ' '{print $2}') #grep -oP "^\d+\s+\K\w{4}");
+		hash=$(echo $leaf | awk -F' ' '{print $3}') #grep -oP "^\d+\s+\w{4}\s+\K\w{40}");
+		name=$(echo $leaf | awk '{$1=$2=$3=""; print substr($0,4)}') #grep -oP "^\d+\s+\w{4}\s+\w{40}\s+\K.*");
 
-        # Get the blob data 
+        # Get the blob data
 		git cat-file -e $hash;
 		#Ignore invalid git objects (e.g. ones that are missing)
 		if [ $? -ne 0 ]; then