Add a script which can be called in git pre-commit hooks for formatting files. Currently allows for autoformatting python files using black

format_staged_files.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+# This is a script which can be included in a pre-commit hook to auto format code using specified
+# tools. In this script we utilize black for python and intelliJ for Java.
+
+# Only run if black is installed
+if hash black 2>/dev/null; then
+
+    # Find all of the .py files in the current git repo, apply black formatting to them and then 
+    # add them again
+    git diff --cached --name-status | \
+    grep -v '^D' | grep '\.py' | \
+    sed 's/[A-Z][ \t]*//' | \
+    xargs black 2>&1| \
+    grep '^reformatted' | \
+    sed 's/reformatted[ \t]//' | \
+    xargs git add
+
+else
+    "Black isn't installed so not formatting python code"
+fi