diff --git a/scripts/cpplint.py b/scripts/cpplint.py
index 52350b4923..4346bd7a4a 100755
--- a/scripts/cpplint.py
+++ b/scripts/cpplint.py
@@ -1145,6 +1145,7 @@ class FileInfo(object):
             os.path.exists(os.path.join(current_dir, ".hg")) or
             os.path.exists(os.path.join(current_dir, ".svn"))):
           root_dir = current_dir
+          break;
         current_dir = os.path.dirname(current_dir)
 
       if (os.path.exists(os.path.join(root_dir, ".git")) or
diff --git a/scripts/filter_lint_by_diff.py b/scripts/filter_lint_by_diff.py
index 7a4c506e27..e018cce315 100755
--- a/scripts/filter_lint_by_diff.py
+++ b/scripts/filter_lint_by_diff.py
@@ -8,11 +8,11 @@ if len(sys.argv) != 3:
   print >>sys.stderr, "Usage: filter_lint_by_diff.py diff.patch repository_root_directory < cpplint_warnings.txt"
   sys.exit(1)
 
-added_lines = set()
 repository_root = sys.argv[2]
 
-diff = unidiff.PatchSet.from_filename(sys.argv[1])
-for diff_file in diff:
+# Create a set of all the files and the specific lines within that file that are in the diff
+added_lines = set()
+for diff_file in unidiff.PatchSet.from_filename(sys.argv[1]):
   filename = diff_file.target_file
   # Skip files deleted in the tip (b side of the diff):
   if filename == "/dev/null":
@@ -25,11 +25,12 @@ for diff_file in diff:
       if diff_line.line_type == "+":
         added_lines.add((filename, diff_line.target_line_no))
 
-for l in sys.stdin:
-  bits = l.split(":")
-  if len(bits) < 3:
+# Print the lines that are in the set
+for line in sys.stdin:
+  line_parts = line.split(":")
+  if len(line_parts) < 3:
     continue
-  filename = os.path.join(repository_root, bits[0])
-  linenum = int(bits[1])
+  filename = os.path.join(repository_root, line_parts[0])
+  linenum = int(line_parts[1])
   if (filename, linenum) in added_lines:
-    sys.stdout.write(l)
+    sys.stdout.write(line)
diff --git a/scripts/run_lint.sh b/scripts/run_lint.sh
index 9fc724fb92..fa588f084a 100755
--- a/scripts/run_lint.sh
+++ b/scripts/run_lint.sh
@@ -3,7 +3,7 @@
 set -e
 
 script_folder=`dirname $0`
-absolute_repository_root=`readlink -f $script_folder/..`
+absolute_repository_root=`git rev-parse --show-toplevel`
 
 if [[ "$#" -gt 2 ]]
 then
@@ -20,6 +20,13 @@ then
   exit 1
 fi
 
+if ! [[ -e $script_folder/filter_lint_by_diff.py ]]
+then
+  echo "Lint filter script could not be found in the $script_folder directory"
+  echo "Ensure filter_lint_by_diff.py is inside the $script_folder directory then run again"
+  exit 1
+fi
+
 if [[ "$#" -gt 0 ]]
 then
     git_start=$1
@@ -62,7 +69,7 @@ for file in $diff_files; do
 
   # Run the linting script and filter:
   # The errors from the linter go to STDERR so must be redirected to STDOUT
-  result=`$script_folder/cpplint.py $file 2>&1 | $script_folder/filter_lint_by_diff.py $diff_file $absolute_repository_root`
+  result=`$script_folder/cpplint.py $file 2>&1 >/dev/null | $script_folder/filter_lint_by_diff.py $diff_file $absolute_repository_root`
 
   # Providing some errors were relevant we print them out
   if [ "$result" ]