diff --git a/build-tool/scripts/common.sh b/build-tool/scripts/common.sh
index 522bfb6..f9f8f97 100755
--- a/build-tool/scripts/common.sh
+++ b/build-tool/scripts/common.sh
@@ -47,6 +47,7 @@
 FLATBUFFERS_BUILD_HOST="$FLATBUFFERS_BUILD_ROOT"/"$HOST_ARCH"_build # Location of flatc compiler
 
 # Tensorflow
+TENSORFLOW_VERSION="tags/v2.5.0"
 TENSORFLOW_SRC="$SOURCE_DIR"/tensorflow
 TFLITE_SRC="$TENSORFLOW_SRC"/tensorflow/lite
 SCHEMA_SRC="$TFLITE_SRC"/schema/schema.fbs
@@ -72,4 +73,18 @@
 
 # Arm NN / ACL
 ARMNN_SRC="$SOURCE_DIR"/armnn
-ACL_SRC="$SOURCE_DIR"/acl
\ No newline at end of file
+ACL_SRC="$SOURCE_DIR"/acl
+
+# Check if directory at $1 is a repository or not
+check_if_repository()
+{
+  pushd "$1" > /dev/null
+
+  if [ "$(git rev-parse --is-inside-work-tree 2> /dev/null)" ]; then
+    popd > /dev/null
+    return 0
+  else
+    popd > /dev/null
+    return 1
+  fi
+}
\ No newline at end of file