Shell function that requires that a GIT index is clean before running a command. The script allows modified or untracked files to exist in the repository, so long as the index is empty.

require-clean-git-index.sh

function require_clean_index()
{
	# TODO: Allow to manually set which git directory
	
	git diff-index --quiet --cached HEAD
	if [ $? -ne 0 ]; then
		echo "This command requires a clean index. Please reset or commit changes and try again.";
		exit 2;
	fi
}

# ----- Example use -----
require_clean_index && 
  git add src/modified-file &&
  git commit -m "Modified the file"