I created this script to remove the hidden .DS_Store file from my projects and automatically initialize and update my .gitignore file to keep it untracked.

rm_ds_store.sh

#!/bin/sh

if [ -f "`find . -name .DS_Store`" ] ; then
	if [ ! -f "`git rev-parse --is-inside-work-tree`" ] ; then
		echo "no git repository found"

		while true; do
    	read -p "Do you wish to initialize git repository in this folder $(echo $(pwd))?" yn

    	case $yn in
    	    [Yy]* ) git init; break;;
    	    [Nn]* ) exit;;
    	    * ) echo "Please answer yes or no.";;
    	esac
		done
	fi

  if[ ! -f "`find . -name .gitignore`" ] ; then
  	touch $(pwd)/.gitignore && echo "created .gitignore"
  fi

  echo "removing .DS_Store"
  find . -name .DS_Store -print0 | xargs -0 git rm

  git config --global core.excludesfile "$(pwd)/.gitignore"
  echo .DS_Store >> ~/.gitignore && echo ".DS_Store added to .gitignore"

else
  echo ".DS_Store not found."
fi

I included this in a blog post.

https://ryankelley.tumblr.com/post/165922779758/a-script-to-remove-dsstore-from-your-project